How to warm the ventilation tube of plastic. Watery insulation of ventilation pipes and air ducts: materials and technology. Ready insulated pipes - Proms of application

The main purpose of the ventilation system is the creation of a favorable atmosphere inside the building. The ventilation pipe, which is included in its composition requires compulsory warming during the cold season.

During operation, the ventilation pipe is heated under the influence of the exit air and is simultaneously blown by cold from the outside. As a result of this wall, the design is covered by condensate. The humidity is assembled in water drops and flows down the pipe, becoming the cause of destruction as a building structure and the pipe itself.

Ways to protect against cold ventilation pipes

Protect ventilation from the effects of cold air can be independently without referring to professionals. However, there may be a problem than to insulate the ventilation pipe.

Thermal insulation can be performed using the following materials:

Mineral wool.
Plates of polystyrene or foamflast.
Polyurethane foam.
Basalt fiber.

The insulation can be applied to the pipe in such ways:

In the form of a shell.
In the form of a cylinder and a half-cylinder.
In the form of a cord.

Mineral Wool Protective Sheath

Insulated ventilation pipe obtained as a result of such an algorithm:

Dust and mud sediments are removed from the pipes.
Wipes in one layer of mineral wool.
Additionally, they turn into one layer of foil insulation. This will prevent cold penetration inside.
The formed joints are sampled by aluminum scotch, to obtain a single holistic insulation. You can also use special brackets or locks.

Working with mineral wool, care should be taken, since small particles of this material can get into the eyes or respiratory tract. It is recommended to wear glasses and a respirator.

Insulation tube pipe foam or polystyrene foam

The use of polystyrene foams as a heater reduces corrosion formation, which allows you to extend the operating period of insulated tube for ventilation.

The foam shell can be mounted without special training, for this it is necessary to follow the instructions:

Measure the desired dimensions of the future shell and cut with a knife or saw.
Put parts of the shell on the pipe, making a small displacement, relative to each other.
Close the side locks of the "Ship-Paz" type insulation.

The use of such a shell allows you to easily remove the insulation in the event of an emergency, and then install it.

Polyurethane foam insulation

The insulation of this type is produced in a similar form with polystyrene foam. However, polyurethane foam has a smaller degree of ignition and lower thermal conductivity.

Thermal insulation of ventilation pipes by this material is performed in the following order:

Cut polyurethane foam on semi-cylinders of the required size, making small points.
Install the blanks on the ventilation pipe.
Tighten the connections using bandages.

Using foamed polyethylene as insulation

Household ventilation pipes are most often insulated using foamed polyethylene. This material is the finished shell capable of take the shape of the pipe and isolate it from the cold.

The insulation of the ventilation pipe on the roof is as follows:

Measure the desired amount of material.
Cut the shell along a special seam.
Wrap a pipe.
Blood seams and joints with a special adhesive composition or mounting sticky ribbon.

Foamed polyethylene does not pose a danger to humans, since in the process of its use there is no extraction of harmful substances, and the material itself fully complies with environmental standards.

Warming with basalt fiber

Basalt wool can be used for insulation and ventilation, and gas pipes.

To carry out thermal insulation work, use such a reminder:

Initially, the pipe is wrapped with basalt fiber.
The aluminum foil layer is placed on top of it, performing the fastening of the wire.
Using a soft wire, stitched a longitudinal seam.
The entire design is fixed with bandage buckles made of aluminum or packaging tape.

Fastening of basalt insulation can be performed not only by the ordinary wire, it can also be used for this:

Annealed ferrous wire with a cross section of 2 mm.
Galvanized wire with a similar diameter.
Wire from a stainless steel with a diameter of 1.2 mm.

To support the insulation, you can make a buckle of galvanized steel wires with a diameter of 0.8 mm.

Basalt fiber used for pipe insulation provides uninterrupted functioning of the system and preserving the shape when exposed to a sharp change of temperature, ultraviolet radiation and various microorganisms.

In addition to the answer to the question, whether it is necessary to insulate the ventilation pipe, it can be said that the implementation of thermal insulation in compliance with all rules and rules will prevent frequent repairs and reduce the risk of emergency situations.

In this material, we will completely discern the problem of the need for insulation of ventilation pipes on an unheated attic room. Consider the feasibility of thermal insulation of pipes, how to make it right and what materials to give preference.

The ventilation pipes on the roof and the attic are insulated in order to reduce the risk of condensate: it accumulates inside the non-insulated tube. The resulting condensate flows down the pipes, penetrating into the joints and cracks, which is why wet spots are formed on the walls or in the ceiling. At a minus temperature, this may cause the formation of an inlet, which reduces the inner diameter of the pipe.
This is due to the content in the warm air of a large amount of moisture. In the cold period, warm air comes into contact with a cold pipe, it is sharply cooled, as a result of which pairs are formed, and then condensate. This process can be stopped using pipe insulation.

Ventilation pipe is prepared for isolation

Advantages of insulation

During the work of the drawing there is noise, the level of which can be reduced when pipe insulation;
When choosing a high-quality insulation, the air duct minimizes the heat loss, since the heat exchange between the warm air inside the pipe and the cooled outside is reduced.

Important! Some modern manufacturers have insulation are already provided.

Negative effects of lack of insulation

Condensate accumulating in the ventilation mine has a negative effect on overlaps. The appearance of condensate also leads to:

Formation on galvanized rust pipe;
Depressurization of the ventilation system;
Reducing the inside of the duct;
Lower quality air exchange indicators;
The emergence of moisture in the floors between the floors, in the middle of the wall structures and so on

The consequences of the negative effects of condensate from the non-isolated pipe

The lack of insulation of pipes can lead to rapid wear of the construction during the cold season. At lower temperatures there will be more condensate, so the insulation of the ventilation pipes on the cold attic and the roof is necessary.

What places do you need to insulate the pipes?

The thermal insulation is necessary in places of the largest square of the contact of cold air with warm. If in your house the ventilation pipe is carried out through the wall, then it is necessary to insulate a part leading to the deflector. In private homes, another cold place is a attic. If the pipes pass there, they must be insulated.

In office, industrial premises, a warmed ventilation valve is created. It opens or closes access for air flows of different temperatures. The valve can heat the exit air, since the sash is processed by Tan, which reduces the risk of condensate. This method is quite expensive.

Important! To start installing insulation yourself, it is necessary to find a place where the condensate appears - the temperature dew point.

Internal and outdoor insulation: for and against

You can warm the pipes in two ways: inner lining or external insulation. Each method has its advantages and disadvantages.

Inner cladding

More difficult in the installation, but not subject to external mechanical temperature effects.
To avoid reducing the inside of the air duct, it is necessary to carry out some work on the increase in the initial area.
Material must be playproof and sealed to avoid absorbing moisture from the air.
The outer part of the material should be smooth so as not to prevent air circulation.

Example of Ventcanal Outdoor Isolation

Isolation of the outside

It is easier to install, but the material must also be playproof.
It is necessary to provide insulation of the exhaust pipe and the installation of the hydrober.
Material must confront mechanical effects.
Isolation must be non-combustible, as in the event of an open fire, it in contact with air.
This type of isolation does not reduce the area of \u200b\u200bthe internal section of the pipe.
Not subject to the formation of pathogenic bacteria.

Materials for insulation of the ventilation pipe

Must comply with these criteria:

Non-hatching.
Good thermal insulation qualities.
Budget.

Consider the most frequently used materials for this purpose.

Mineral wool

Insulation - Mineral Wat

Has its positive parties:

The most inexpensive and affordable insulation.
Fireproof.

There are negative aspects:

The process of insulation of mineral wool is rather complicated. First, it turns around around the pipe, then around wool galvanized or foil, then the design should be pulled by a bandage.
Over time it is pleasant. Because of this, open areas are formed between the insulation and the surface of the pipe.
Wool can lose its thermal insulation properties with a sharp increase in the level of humidity.

Important! Mineral wool toxic for man! Installation requires protective equipment.

Styrofoam

Foam insulation for pipes

For thermal insulation of pipes, ready-made split structures made of polystyrene foam.

Advantages of foam:

Simple in installation: the finished pipe has spike-groove connections. The design is put on the pipe and pressed to each other, thereby forming a strong connection.
Does not change its characteristics due to a sharp increase in / lowering the humidity level.
Budget.

Disadvantages of foam:

Combustion. Also during combustion of expanded polystyrene, there is a toxic pair for a person.
Finished forms cannot be used on turns, suitable only for open direct sections of the pipe.

Polyurethane foam and polypropropylene

Polyurethenietian shell for warming steel pipes

The design is similar to a foam pipe

Different with high price.
Different with special mechanical strength.
Require an additional layer when installing: it is necessary to use a knitting wire bandage.

Polyethylene foamed

Pretty common solution and inexpensive

It is a tube with different diameters and size.

Benefits:

It is easy to install it. It is necessary to just put on the pipe.
Not subject to external mechanical exposure.
The structure of foamed polyethylene makes it impossible to appear rodents.

For residents of predominantly cold climate, the following materials will be suitable:

Penofol - polyethylene with a layer of aluminum foil. The use of foam prevents the accumulation of dust and other types of pollution.
Self-adhesive insulation based on polyethylene agent. This material is very easy to install: it is necessary to remove the protective film and press it to the surface of the pipe. For greater insulation it is possible to stick into two or more layers.

It looks like ventkanals, heat insulated by foam

From this material you learned some features of the ventilation pipe in the attic or the roof and met various types of materials. Further choice will have to make you.

Procedure of work on the insulation of pipes

To insulate the ventilation pipe, the foam must be followed by these steps:

Find out the exact dimensions of the pipe, including inner diameter.
Make cuts with a knife or saw.
Place the cylinder fragments on the pipe, shift them for several centimeters.
With the force of silently with the castle pairing "Comb-groove" parts on the sides.

This design is easy to install and disassemble.

It is also possible to use structural elements with factory insulation.

To insulate the pipe with a finished shell of foamed polyethylene, you need to perform the following steps:

For tight fit of the insulation, remove all the necessary measurements.
Find a special seam capsule.
Disconnect the capsule on this seam.
Fix the material on the pipe.
Perform the insulation of the joints with a scotch tape or adhesive method.

For insulation from fire-resistant polypropylene or polyurethane foam must be performed:

Removing the necessary standards from the pipe to determine the size of the material used.
Cutting blanks on half-cylindrical segments. It is necessary to take into account the reserve on the cover layer.
Formation of cut capsule blanks.
Fastening the joints by bandages.

For rectangular ventilation opening:

It is necessary to find a slab or rolled insulation of the desired thickness (basalt fiber is suitable).
The material is cut by fragments desired for mounting.
The segments of the material are bonded between themselves pre-calcined steel wire.
Strips of foil with adhesive layer are sealed seams.

In all these isolation methods, there is a general drawback - "cold bridges". To avoid their education, it is necessary to comply with the technology of work in the installation process. Also needed with special care to isolate joints and seams between house designs and ventilation channels.

Video: An example of insulation of air conditioning air conditioning residential buildings

Heat chimney in the attic

Inside the chimney passing through the non-residential cold attic or roof, the formation of condensate is also possible. To avoid this, you can isolate the pipe polyurethane foam (PPU). The second option is the use of sleeves - "sandwich pipes" - composite insulated parts of the chimney.

In addition to liquid insulation in the form of a foam, it is possible to use double pipes from "sandwich pipes", sleeves and heat-insulating material. This type of insulation performs the function of heat saving and prevents the formation of condensate due to the foil screen.

The principle of thermal insulation of the chimney

With a high probability of water freezing, a thermal insulation electrical cable is used. It is turned around around the pipe or fix next to it. Some pipes are built into a heating cable.

For insulation of the brick tube, kaolin plates are used. For their installation, a special solution is prepared and glued them to the pipe. Top plate are covered with plaster. Kaolin plates are one of the most reliable ways of thermal insulation of brick pipes.

Warming of pipes on the roof or attic is an easy task with which you can cope alone if you know some features of the equipment.

Advantages and disadvantages of ready-made insulated pipes

For those who do not want to engage in independently, there are ready-made insulated tubes with a layer of factory insulation. They have a simple design: a protective layer of basalt fiber is inserted between two channels of different diameters.

Specifications

Such pipes are used in the construction of ventilation systems and chimneys. In the first case, it is necessary to use products from galvanized, in the second - stainless steel. Protection against moisture and the maintenance of heat provides a layer of Minvati with the following characteristics:

flammability - G1 (weakly farming).
the thermal conductivity coefficient is 0.038-0.051 W / (M * K).
strength - from 5 kPa to 80 kPa.
water absorption - 2%.

Ready insulated pipes

The mineral base prevents the formation of fungus and mold, and the structure of the fibers is maintained even after a long period of operation. The melting point of the insulating liner is 1100 ºС, which indicates the fire safety of the product. The combined composition makes products absorbing internal noises and durable. The minus of this product is a high price.

Installation features

If you decide to mount the design yourself, the following reminders can help you:

With a wide cross section of pipes, air flow circulation occurs better (recommended minimum diameter - 14 cm).
Short channels must be made wide enough.
To preserve the thrust force, all channels of the airlows in the house must match each other.
It is better to apply the same type of heat insulation and pipes.
Forced ventilation should be installed in violation of natural heat exchange.

Mounting process insulation

Video: Effective way of insulation of exhaust pipe

Possible ways to prevent deficiencies

There are no shortcomings for insulated pipes that would affect operation .

However, it is worth considering that several steel layers will be harder than corrugated or polymer insulation. Nevertheless, the installation quality does not affect the installation process, so this characteristic is rarely taken into account.

If there are doubts about the cost, you can make a simple calculation: the difference between insulated structures is compare with the sum of the value of pipe sets, insulation with waterproofing and the cost of fixing tools. If the difference is small, you need to choose the material easier in the installation.

Outcome

Warming of pipes on a cold attic or roof is necessary. Material should be chosen based on its budget and features of a particular home.

Before heating the attic in its own private house, it is necessary to define places and elements for insulation. In this case, we will consider the thermal insulation of the unheated attic. The insulation of the attic overlap and its walls will help keep warm in the room in the winter and will not give a lot of hot rooms in the summer.

An important factor is the insulation of communication engineering elements passing through a cold attic. For example, it can be a chimney or ventilation channels (pipes).

How to insulate overlapping on a cold attic

To date, there are many options for insulation overlap the attic with their own hands. The greatest distribution was the following thermal insulation materials:

mineral wool. These include glass, stone and slag cotton wool. Produced in plates and mats;
polystyrene foam and foam. Polystyrene foam is a better material than foam. It has greater durability and density less moisture absorption;
polyurethan (PPU). One of the most technological, high-quality and expensive insulation;
bulk materials (sawdust, ceramzite, slag, etc.).

Before you insulate the attic of a private house with one of the above insulation, it is necessary to determine which one will be the most rational. For example, it is simply impossible to put the plates of mineral wool. For such a case, it is better to use bulk insulation, which will fill all empties and irregularities.

Warming with mineral wool with their own hands is found quite often due to good thermal insulation and soundproof properties. Before laying minvati to Paul, the attic is stacked by vapor insulation to prevent moisture from entering the lower rooms.

In case of moisture in the mineral wool, its thermal insulation characteristics decrease sharply, which leads to significant heat loss from the lower premises of the private house.

Most often, Minvatu is laid in two layers. From above also laid vapor barrier and already then make a draft floor for movement in the attic.

The insulation of polystyrene foam (foam) is also recommended to produce a layer of vapor insulating membrane with a lining. The moisture permeability of these materials, though insignificant, but it is better to progress and get rid of possible future difficulties. For self-insulation on a cold attic it is better to use polystyrene foam plates, as they are stronger than foam.

The insulation of a cold attic is better to produce polystyrene foam plates with a stepped edge. This will make it possible to make a seamless heat insulating layer, which will not give the opportunity to pass the air from the outside.

The insulation of a non-residential attic polyurethane foam (PPU) is the most efficient and qualitative way for a wooden private house. The main advantages of polyurethane foam are the following:

absolute seamlessness. After applying, the PPU creates a monolithic layer of heat insulation;
ecology. The material does not contain volatile components that may be allocated during its operation;
high adhesion. PPU is connected with almost any surfaces other than polyethylene and fluoroplastic surfaces;
PPU has one of the lowest thermal conductivity coefficients;

However, it is worth considering that the material should be applied on a dry surface with a temperature of +10 ° C. In addition, it will not be possible to apply the PPU. This will require equipment and specialists who will be able to properly select the content of the components and configure the equipment. Therefore, for insulation, the attic of this material will require substantial financial investments.

The most old and proven way of insulation of the attic overlap with their own hands is thermal insulation by bulk materials. Before filling material, the lining layer is stacked - parchment, vapor barrier membrane, and the like. It all depends on the specific type of insulation and the technology of its preparation before direct laying on the church of the attic.

When insulating walls in the attic, if any, you can use all the above materials. The exception is only bulk materials, which, for obvious reasons, are not suitable for thermal insulation of the walls.

Warming on the attic of ventilation pipes

To maintain the stability of heating indicators in a private house and avoid the appearance of excess moisture and mold requires high-quality warming of ventilation pipes and air canals on a cold attic. Condensate can be formed in the air ducts due to the temperature difference between the environment and the room. Condensate can cause serious damage not only by ventilation pipes and channels, but also by building structures, penetrating into their porous structure.

With proper and correct warming of ventilation pipes, the following list of obvious advantages appears:

condensate does not appear on the inner and outer surface of the ventilation pipes;
with high-quality thermal insulation of ventkanalov, it is possible to avoid vibration when moving air flows through pipes, as a result, noise insulation increases;
significant reduction in thermal losses. The simple insulation of the ventilation and heating tubes in the attic allows you to significantly save resources and make a comfortable thermal mode in a private house;
modern heaters have good refractory properties, which makes it possible to prevent the movement of fire on the ventilation pipes during the fire.

For insulation of ventilation pipes, it is better to use the following materials.:

polyurethane foam (PPU);
mineral wool.

Polyurethane foam shells

Shell from polyurethane foam has the following:

Polyurethane foam (PPU) has one of the best thermal conductivity coefficient compared to other thermal insulation materials. It is this fact that allows it to be used in many areas of construction.
The price of products from the PPU shell is lower than that of similar products made from other materials, such as minvats.
Many are deeply mistaken in the ecology of this material, preferring to use mineral products. PPU does not rot and disintegrate over time on small particles that can be distinguished and harm others.
The shell can be attached to their own hands without using a specialized tool or professional installers.
The operating temperature range varies from -160 to 90 ° C.
The durability of the PPU is also at the height. The service life under normal conditions reaches 25 years.

To the only lack, you can attribute the fragility of the material that may appear when mechanically exposed to it.

Installation of the PPU The shell is performed at temperatures from -35 to 40 ° C. The semi-cylinders are fixed with the help of polymer or metal "clashes", stainless wire or assembly tape. Before performing installation work, the ventilation pipes are treated with an anti-corrosion solution, which allows you to increase the life of the pipe and insulation.

In order to avoid the gaps and cracks of the shell and the pipe should have the same diameter. The shell thickness (heat-insulating material) is calculated according to weather conditions in your region by SNUP 2.04.14-88 (thermal insulation of equipment and pipelines). Semi-cylinders The shell is fixed using a spike-groove compound, but for pipes with a small diameter, a "Step" connection is used.

Each element of the shell is put on a pipe with some displacement of 5-10 cm, thus creating a fiscal of material. In the joints of the joint items are recorded in one of the above methods.

Mineral wool

This insulation is distinguished by relative cheap and fire safety. However, one should consider a number of difficulties with which you will encounter when using it:

the installation process is quite laborious. Ventkanal in the attic turns into a layer of minvati, which is turned around with galvania or foil. Fixation occurs with a screed of bandages;
when working with glass, it is necessary to protect the respiratory organs, skin and eyes from its hit;
this material over time has the property to lift, which leads to the appearance of cold bridges and the loss of thermal insulation qualities;
moisturizing dramatically impairs the thermal insulating properties of the material.

Warming in the attic of the chimney

To avoid condensate formation on a chimney, which passes through a non-residential attic you can use liquid insulation of polyurethane foam (PPU). You can also use the sleeves that are sandwich pipes - the warmed composite sections of the chimney.

In addition to liquid insulation, which is applied to a pipe as a foam, double pipes can be used, which consist of thermal insulation material, sleeves and heaters sandwich. These materials have a foil screen and perform the heat resistant function and prevent condensate formation. If the probability of freezing the pipe is high, then you can apply a special electrical cable, which is fixed to the pipe, or turn around it with turns. There are also pipes with built-in cable for heating.

If there is a need to warm the brick tube, which is rare enough, you can use the plates from Kaolina. For this prepare a solution and glue the plates on the pipe. The plaster is applied on top of the plates. As a rule, after these events, you can forget about condensate.

As you can see, insulate the attic of a private house - the task is simple, from which you can cope with yourself. It is enough to know some theoretical foundations based on insulation materials and basic construction skills.

Thermal insulation (insulation, heat insulator) is a design element or material that provides heat transfer resistance or its decrease. Its use is the main way to prevent condensate in the ventilation systems. Insulation to properly operate ventilation pipes (ventrub, ventrukavov) - the need. In addition to the protection against moisture appearance, the insulation performs an additional function - dries wind noise.

Fig.1 Insulation of the ventilation system

What is dangerous condensate

The appearance of water droplets inside the venture is an inevitable process in the collision of the flows of warm and cold air, high humidity, disorders in the operation of the system and the rules of operation of the premises. Condensate not only gradually destroys material, but creates favorable conditions for the development of mold, fungi. This increases the risk of spreading allergic and respiratory diseases. Especially it is especially necessary insulation of ventilation pipes on an unheated attic. In winter, the difference in air temperatures in the ventilation system and pipe walls increases. Moisture is formed more, it can accumulate not only on the inner surface of the duct, but also outside. It does not need heat insulation only relatively new textile (tissue) pipes, due to the peculiarities of the material moisture in them do not accumulate.

Fig.2 Condensate on a pipe

Types of ventilation systems

Ventsystems are divided according to the principle of work on exhaust, supply, imputy-exhaust. There are no differences in the installation of thermal insulation for them. At the place of installation of the ventilation system there are household and industrial. The area, air exchange pipelines, the volume of harmful evaporation in production is many times higher than in a residential, office or commercial premises - more powerful equipment is required. Another difference - plastic pipes are used in domestic ventsystems, in industrial metal galvanized.

Metal ventrics are particularly needed to protect against condensate. In the process of cutting into pieces of the desired length, the α-dying layer is broken. From contact with moisture metal quickly rust, the pipe comes in disrepair for 2 to 3 years.

Fig.3 Industrial Ventcils

Insulation for household premises

Heat the ventilation pipe in a residential building or private house with the following materials:

Mineral Wat (Minvata).
Polyethylene foamed.
Foamed rubber.
Styrofoam.
Polystyrene foam.
Asbestos plates.
PIR plates.

Organic thermal insulators, such as cellulose eco-water, for insulation of ventilation indoors or in the attic, are not suitable, as they are flattened for 2 to 3 years and lose properties. Wipe the pipe with a cloth, felt meaningless. Such protection is quickly soaked in moisture and give the effect inversely desired.

Fig. 4 Warming Valent Service Household System

Mineral wool

Titled "Mineral Wat", sellers and manufacturers understand insulation materials from glass, slag or basalt fibers, in the form of plates or flexible mats. Basalt wool differs significantly at the price and characteristics, the slag on sale is rare (due to harm), so mineral is usually called glass gamble. Other names are Minvat, glass gamble, glass wool.

Advantages:

good insulation and noise absorbing properties - the thermal insulation coefficient of 0.030-0.052 W / m ° C;
elasticity, just mounted on top of the circular pipes;
strength;
fire safety, withstand temperatures up to 450 ° C;
low price.

Disadvantages:

The fibers are frky, in the process of cutting and mounting, many very small and sharp fragments are formed. They easily penetrate the clothes, in the skin, lungs, eyes, work in the respirator, protective glasses and workwear.
The composition of cheap minvats may include phenol formaldehyde resins. They cause poisoning and oncological diseases. When buying a heater to ask the seller from the seller an expert opinion on the compliance of the goods by sanitary and epidemiological and hygienic requirements.
Glasswater strongly absorbs water from the air, moisture is delayed inside and with difficulty is displayed. The solution of this problem is a foil coating minor service that performs the role of vapor barrier.
With constant contact with moisture for 3 years, glass gamble loses up to 50% of heat insulating properties. This does not concern the Minvata foil.
Even in dry glazed rooms, glazed is gradually lung.

Fig. 5 Minvata

For insulation of round ventilation pipes, minvatu are used in mats (rolled). It is turned around as a blanket, the pipe and fix the annealed wire (for mating fittings), metal or synthetic packaging tape. Square Ventrukawa can be protected by glass gamble plates. They are glued with special glue.

Basalt Wat.

Basalt (stone) wool consists of fibers of molten rocks (basalt). This is a more modern, improved mineral insulation. Stone wool, as well as glass, sold in plates and mats. Their installation is carried out in the same way as when insulation of the Minvata.

For the rapid and convenient implementation of thermal insulation of chimney pipes or round-section ventilation, some manufacturers produce ready-made cylinders from basalt fiber, with foil coating or without it. The cylinders are easily cut into pieces of the desired length. They are put on a pipe, like a case or shell. The locking locks on the cylinders provide a dense bond without cracks.

Fig. 6 cylinders from basalt wool

The advantages of basalt wool :

fireproof - Material refers to non-combustible, withstands the temperature to 1000 ° C;
durability - Unlike Minvati, basalt mats are not deformed over time, do not settle (the thickness of the insulation layer does not change);
the thermal insulation coefficient from 0, 034 to 0, 038 W / m ° C.

disadvantages :

the danger to human health - applies only to cheap brands, in expensive instead of phenol formaldehyde resins use a biopolymer binder;
higher, compared to the mining price.

To protect against absorbing moisture, high-quality basalt cotton sweat is impregnated with water-repellent composition (hydrophobizer) and coated on one side by aluminum foil.

Fig. 7.

Polyethylene foamed

Inexpensive Easy way to insulate round air ducts or ventilation boxes - to cover them with foamed polyethylene. This material is externally similar to the foam rubber, but with larger cells. His varieties:

Normal. Trade names - isolon, foam, heat and other material cut into pieces, turn them with a pipe and glue with scotch.
Fungalized. On the one hand, it is covered with aluminum foil. She pushes moisture and reflects heat. Trade names - Penofol, Ultraflex, Pharaal, Mosfol, Tepopol. Aluminum adhesive tape or special glue are suitable for gluing the seams of insulation with the reflecting layer (for example, the anti-mock).
Self-adhesive. A layer of glue is already applied to one of the sides of this material. This makes it easier to work.
Pipe heat insulation. Of the foamed polyethylene, as from basalt fiber, make ready-made cylinders-shells for round-section pipes. Trade names -Energoflex, thermalflex, etc.

Fig. 8 Polyethylene foamed

Characteristics :

thermal conductivity coefficient - depending on the brand from 0.031 to 0.051 W / m ° C;
moisture resistance - water absorption from 0.2 to 1%;
range of operating temperatures - from -60 ° C to + 100 ° C;
service life - up to 10 years.

Dignity :

elasticity;
strength;
resistance to the effects of acids, alkalis, other aggressive substances;
simple installation without waste, is cut by a conventional knife, little weighs;
the ability to dismantle and reuse.

disadvantages :

melts at temperatures above +100 ° C;
class of flammability G2 (moderate-burning) - now brands have appeared on sale with the addition of flames, which belong to the class G1 (weaklyan);
high smoke-forming ability - class D3;
it is harmful to ecology - a period of decomposition of 200 years.

When buying foamed polyethylene, pay attention to the marking. According to the method of production, two of its kind distinguish:

stitched - PPE;
susty (gaspen) - NPE.

PPE is a bit more expensive, but superior to NPE in all characteristics. It is possible to distinguish the NPE from the PPE in the smell of gas (button, freon is used in its production). In Europe, for the construction of an unstituted foamed polyethylene to apply generally prohibited.

Fig. 9 Stitched and notchy foamed polyethylene

Foamed synthetic rubber

This material is designed specifically for insulation of pipes, 90% consists of closed pores. Externally foamed rubber looks like PPE, but is distinguished by increased flexibility. It is released in the form of sheets, mats, rolls and tubes (cylinders), including the foil layer. Installation is performed in the same way as when using foamed polyethylene, there are brands with a glue layer on one side.

Characteristics :

the coefficient of thermal conductivity - from 0.024 to 0.038 W / m ° C
range of operating temperatures - from -200 ° C to + 175 ° C;
service life - up to 30 years.

Advantages of foamed rubber :

moisture resistance;
resistance to the appearance of mold;
class of flammability G1, self-fighting;
does not emit dust, fibers, harmful substances and unpleasant odors - is suitable for use on facilities with increased sanitary and hygienic requirements;
low price.

Fig. 10 foamed rubber

Styrofoam

Polyfoam - foamed mass of polymers (plastic), the bulk of which occupies gas. One part can be covered with foil. The material is hard, produce it in the form of plates or tubular isolation (shells from two to three sections connected by the zip-groove lock). The foam in the plates is suitable for insulation of pipes of only square section.

Characteristics :

thermal conductivity coefficient - from 0.032 to 0.050 W / m ° C;
water absorption - 4% in 30 days;
strength limit with static bending - from 0, 07 to 0.20 kgf / m2;
service life - up to 25 years.

Dignity :

low weight;
and installation;
resistance to rotting;
low price.

disadvantages :

it is easily ignited - a group of flammability G3 or G4;
when burning, it distinguishes harmful substances - it is possible to buy foam only known brands, high quality;
attractive for rodents.

Installation of plates or cylinders from this insulation is carried out according to the principle of brickwork (with displacement of elements relative to each other). Slices fasten with special glue for foam - anyone does not fit, as this material is melted at contact with many substances.

Fig. 11 foam cylinders

Polystyrene foam

Polystyrene foam (Penoplex, Technoplex, EPPS) - improved more durable, moisture resistant and expensive variety of foam. We produce this insulation in the form of plates or tubes (shell) with spike-groove locks.

Characteristics :

the coefficient of thermal conductivity - from 0.028 to 0.034 W / m ° C;
water absorption - 0.4% in 30 days;
strength limit with static bending - from 0, 4 to 1 kgf / m2;
range of operating temperatures - from -50 ° C to + 75 ° C;
service life - up to 50 years.

The advantages and disadvantages of EPPS, the installation rules are the same as a foam.

Fig. 12 polystyrene foam

Asbestos plates

For insulation of ventilation pipes and insulating roof insulation, asbestos (asbestos-cement) plates were previously used. Now in many countries to apply materials made on the basis of asbestos is prohibited. This is due to the risk of developing oncological diseases with regular inhalation of asbestos dust, which inevitably appears in the manufacture, cutting, installation.

Pir plate

Polyenemiosianorate made a new generation insulation with a rigid cellular structure - PIR. On both sides of the slab from this material are covered with foil.

Characteristics :

thermal conductivity coefficient - 0.021 W / m ° C;
water absorption - no more than 1%;
compression strength - 120 kPa;
service life - up to 50 years.

Dignity :

the combustion system of G1 - r2 (weakly or moderate);
there is no risk of damage to fasteners during installation;
resistance to rotting.

Disadvantage - When combustion, poisonous substances allocate.

Fig. 13 PIR plate

Insulation for industrial systems

For thermal insulation of pipes of industrial ventilation systems, in addition to listed insulation, more expensive ways are suitable:

Pouring sprayed polyurethane foam.
Installation of finished air ducts with thermal insulation.

Polyurene Foolder

One of the best ways to protect ventilation pipes of industrial systems - sprayed thermal insulation from polyurethane foam. With the help of special equipment, the surface of the air ducts is poured with a layer of foam.

Types of polyurethane foam:

Close (hard) - in addition to excellent thermal insulation properties, it provides waterproofing (absorbs not more than 4% of moisture).
An open (elastic, light) - several times less weighs, better absorbs the sound, it is cheaper, but requires additional waterproofing (absorbs up to 15% of moisture), unsuitable for external work.

Characteristics :

thermal conductivity coefficient - from 0.019 to 0.04 W / m ° C;
range of operating temperatures - from -160 ° C to + 150 ° C;
the combustible group - G1;
compression strength - from 150 kPa;
service life - from 20 years.

Dignity :

tight fit of the layer of insulation to the pipes;
complete lack of seams;
the possibility of applying any complex forms on pipes;
quick installation.

disadvantages :

high price;
complex installation - work experience with this material is required;
the composition includes toxic substances - it is necessary to use overalls, respirator, glasses (after frozen the danger of poisoning of poisoning).

Fig. 14 Warming of pipes polyurethane

Heat insulated air ducts

Another option to solve the problem of condensate appearance in the ventilation system - use when installing already insulated air ducts.

Flexible - consist of a wire spiral carcass, a metallized film, a layer of insulation and the cover from the same film.

Fig. 15. Flexible insulated air duct

Hard - from Pir-plates (PirrowentItiTuct), from fiberglass plates Climaver and so on . According to the strength of the pipe from this material are comparable to the familiar steel. Air ducts from insulation plates can be connected with standard steel ventresses using flanges.

Fig. 16 Air Ducts from PIR-Plate

Dignity Heat insulated ducts:

reduction of consumption for materials;
reduction of weight of the entire system;
quick installation.

There are no significant disadvantages of thermally insulated ducts.

When choosing a suitable material for thermal insulation of the ventilation system, consider:

The thermal conductivity coefficient must be as low as possible.
Moisture resistance. The loss of insulation properties due to absorption moisture can be reduced to zero all the advantages of the material, including a low price.
Mounting complexity. The cost of services of specialists depends on the danger of the material and the features of its attachment. The insulation is a cheap insulation may eventually cost more than the highest quality. If the work is supposed to be performed independently, then the value has the costs of time and strength.
Fire safety class. This indicator can be decisive when choosing between two insulation with similar characteristics, if it comes to a high risk of fire.

According to experts, the optimal version of the insulation of the venture - foamed polyethylene. Foamed rubber exceeds it in all characteristics and does not have drawbacks.

Low temperatures harm not only living organisms, household appliances are also afraid of supercooling. And most often owners of private houses, country houses or summer cottage houses face the problem of insulation of the exhaust. Properly insulate the hood with your own hands should be able to every owner. Such measures will ensure the safety of the air purification system.

Hood insulation - an important process that provides the safety of the system

Why is it important to warm up the exhaust system

The ventilation system is a set of equipment designed to circulate air indoors. Air masses are transferred through ventilation air ducts, which are located inside the house (under the ceiling, in the attic and roof) and on the street. But this process is accompanied by a number of problems:

heat loss at the expense of air exchange;
high level of vibration, noise;
condensate accumulation.

To avoid such problems, it is better to warm ventilation. Let's look at how to insulate the hood in a private house with your own hands.

Pluses of insulation

The difference in air temperature is outside the room and inside ventilation - the cause of condensate. The accumulation of moisture on the surface of the pipes leads to icing of pipes in winter. The concomitant problems are corrosion of metal pipes, sedimentation of water droplets on the walls of the house (with a further manifestation of fungus), reducing the lumen of the pipe under frost. The insulation on Ventkanals prevents the appearance of condensate.

Air turbulence in conjunction with the operation of fans - the causes of noise. Wenting insulation will reduce this irritating factor.

Warming will reduce the noise level occurring during the work of the hood

Properly selected insulation of air ducts reduces heat loss, since heat exchange between cold air outside and warm inside the ventilation shaft is minimized.

In the proportion of modern ventilation elements, insulation is provided by the manufacturer. There are exhaust and air ducts in which there are already insulation. Take into account this factor before purchasing and installing ventilation, because you initially save on further insulation.

Where to warm the pipe?

If you decide to warm the ventilation pipe in a private house, remember one rule - first of all warm the temperature of the temperature drop. These are the outlets of the pipes outside the building, the place of passage through the ceiling, the air duct in the attic must be inspired in full.

Before the start of insulation, it is necessary to find the "dew point". This is the place of changing the temperature of the vents of the ventilation channel. From this point there is a laying of the insulation.

Warming is carried out both inside and outside the building. In the first case, it is technically difficult to carry out insulation, but the material used does not require protection against physical impact. To preserve the bandwidth, it will take an increase in the area of \u200b\u200bthe cross section of the air ducts. The insulation is covered with a durable film with a smooth surface, which helps to reduce the resistance of the moved air. To avoid absorption of moisture insulation, it is better to use a steamproof material.

Vaporizolation will be required at external thermal insulation. But, unlike internal works, you will need a hydrobarier and mechanical protection. Do not forget fire safety: thermal insulation material - a good fire distribution catalyst. Make your choice of ventilation insulation in favor of non-combustible materials (mineral wool, glass gamble, basalt fiber).

How to insulate ventilation?

Modern consumers prevent the same requirements for thermal insulation materials: functionality, price, fire safety. But you need to know what to insulate the ventilation system is safe and inexpensive. Therefore, manufacturers provide a wide range of materials for insulation of different forms and properties:

Mineral wool - cheap, but effective material

In standard form, it has the form of mats, but for pipes it is more convenient to use a cylinder from the same material. The thermal insulation of the air ducts with the use of cylinders reduces the consumption of the material, speeds up the process of mounting the insulation.

price (cheapest material);
high level of fire safety.

mounting difficulty;
storing material with time;
reducing thermal insulation properties during wetting.

Polystyrene foam or foam

Cheap and durable material. Easily mounted, produced in the form of plates and cylinders, the fastening of which is connected to the type "spike-groove". But this material has a number of disadvantages: flammable (it is easily flammable and toxic waste in the combustion process), fragility (absolutely does not tolerate mechanical exposure) and no elasticity (not bend to obtain the desired form);

Polyurenenitan - according to properties and indicators is almost identical to the foam, but it has one advantage - high mechanical strength. The material itself is more expensive than the polystyrene foam, besides, when installing the shells, we use a bandage from the wire. This factor significantly increases the cost of installation.

The foamed polyethylene (foam) is produced in the form of split tubes coated with aluminum foil, the diameter of which is selected for the desired exhaust pipe. Mount this material is easy - just put it on the insulated pipe. The main advantages of such insulation are strength, moisture resistance and price. Aluminum coating gives the material of dust-repellent properties, increases the ability to thermal insulation and reduces the likelihood of ignition.

Basalt plates are not ignited and do not ignite

Basalt plates are not amenable to rotting and do not burn, but you will need an additional parobarrier and a layer of waterproofing.

Regardless of the selection of the material, there is a specific insulation mounting algorithm.

First of all, the pipe is cleaned of dirt and dust. The second step is to find the "dew point", which will give to understand the location of the temperature inside the ventilation system. Then the insulation itself is mounted according to the manufacturer's instructions. After the end of the insulation, it is necessary to check the entire volume of installation for the presence of defects - missed places, weak fasteners, etc.

For insulation of rectangular ventilation, plates or rolls from mineral wool or basalt fiber are used. For fastening the plates requires steel wire and adhesive tape from foil. Be sure to use personal protective equipment when working with this type of materials! This will help protect the eyes and respiratory organs from the fields of materials.

You can warm the ventilation system in a private house with your own hands, but if you are not confident - contact the insulation specialists. The wizard will conduct an analysis of existing ventilation, performs measurements of all pipes, hoods, will advise and select the material that is suitable for your home.

If you have decided to perform work on your own, you should remember the main points:

Spend a detailed analysis of air ducts and find the "dew point";
Explore the properties of the material selected for insulation;
Do not save on the quality of materials if you want to get the desired result;
Remember the safety technique when working - use PPE (glasses, respirators, gloves).

Properly insulated ventilation system will last for many years with fictional functionality. It will require less repair of individual details.