Select pipes and air ducts for ventilation devices

By Admin | Garden And Buildings / Communication
02 May 2016

Organization of the ventilation system, which supplies the house with fresh air and the outdoors spent a lot, necessity dictated by providing a standard of hygiene.The device ventilation - strict requirement for the presence of gas heating.A system with natural air circulation erect small one-storey houses.Devices for venting necessarily set in bathrooms, sauna, kitchen, fireplace rooms, if they exist.Regardless of the method of ventilation is mainly constructing the system of channel type, using air ducts for ventilation, the characteristics of which are worth reading.


Specificity facilities Duct ↑

If the ventilation system is produced in the process of construction of the building, they are usually lay in the wall in order not to spoil the interior is not too attractive communications.Best of all, if

the ducts positioned vertically near the chimney (not closer than 10 cm) that will enhance traction.Optimally, if for each room is arranged a separate duct, and they are all combined in one discharge channel.Admitted and other wiring schemes, if the premises are located in different parts of cottages.

Ventilation shafts, laid during construction
If the ventilation system is made in the construction process, paving the vents in the walls or in the facilities for their installation mines

attention.Crossing ducts with sewage, gas pipelines, water utilities building codes prohibited.The ventilation shafts can not lay a sewer pipe.

Channels can lay bricks or mount using a ready-made pipe for ventilation.The latter method is less labor intensive, it is easier to carry out himself.Most often used for organizing duct galvanized steel or aluminum pipe rolling.Metal products and is now installed in offices, public buildings, industrial buildings, characterized by a high degree of explosion.However, with the introduction of polymer products in various areas of construction plastic pipes for ventilation have been actively displace metal counterparts.

Two ways to duct device
Two variants of the device duct on the left - all united in a common duct system with one outlet pipe, to the right for each room set your duct

What better plastic or metal?↑

Before comparison made of materials with different technical characteristics, examine the list of requirements to air ducts.After the function of metal products, galvanized and PVC pipes for ventilation must perform one.

comparing the technical characteristics ↑

General requirements for ventilation ducts:

  • Providing impeccable integrity.
  • Creating conditions for free flow with a specific amount of a given design speed.
  • Compliance with health and safety standards on the composition of products and the level of noise generated.
  • Resistance combustion.
  • maximum alignment with the design of the premises.
  • high insulating properties.

for forming tight joints as plastic air ducts for ventilation and metal products are equipped with special flange elements.That is, to build both versions of the system can be of any complexity.PVC products and metal pipe rolling comes with different shapes and volume of the section.Hence, complications with selecting suitable pipe not in both cases.But at insulating characteristics of the innovative material is substantially ahead of the metal, which requires mandatory thermal insulation in the area of ​​the passage through the roof.

Galvanized rectangular duct with insulation
In the area of ​​the passage through the roof structure galvanized necessary to insulate the ducts in order to avoid condensation, corrosive metal, plastic is not afraid of moisture accumulation

nonflammable galvanized pipes for ventilation systems are indispensable for the construction of air in production shops with the threat of dangerous fires.However, for the housing arrangement with standard operating conditions are not required, but to spoil the picture of an interior sheet metal ducts can be cumbersome completely.In addition, a metal channel in the case of turbulence noise is amplified negative, bouncing off the walls, which does not happen in plastic ducts.

Council.To eliminate the "twists" with the characteristic sound negative corrugated pipe for ventilation and rigid channels, it is desirable to build a minimum number of turns.Avoid the need to 90º angles and abrupt transitions from one pipe diameter to another.

Flanged joints for galvanized pipes for ventilation
welded flanges for tin galvanized pipe necessary to carry sealed connections to perform bends with a certain model of the flange degrees, for routing and switching to a different diameter

As the amount of operational benefits Plastic ahead metal, the only drawback of PVC is the lack of fire.If the chimney ventilation is set next to the chimney, from polymer products should be abandoned.

hard and corrugated channels ↑

Depending on the complexity of the system being built in the course of its devices use rigid and flexible ducts.With the rigid elements is clear, they are both variations with round and square cross-section.Round nice and compact, and they are mainly used for the construction of ventilation in a country house.

Flexible pipes needed if a small area of ​​the channel is necessary to rotate several times for connection to the main line.

  • Metal flexible air ducts for ventilation systems made of multilayer aluminum foil with a corrugated structure.Bend can be at any angle, but it must be remembered that there are smooth inner surface creates additional drag.
Metal flexible duct made of aluminum foil
using metal flexible duct system makes it easier to arrange and use the minimum number of flanges
  • flexible corrugated plastic pipe for ventilation is made of polyester and aluminum foil.The multilayer structure of its reinforced steel wire, paving the windings between the layers.Now Producing PVC products with high thermal insulation and sound-absorbing qualities.That they are used for lining ducts in the housing.
Flexible corrugated pipe for ventilation
plastic corrugated pipes - the most common option for the unit ventilation country cottages: a minimum of connections and fastenings, the maximum rate facilities

Corrugated products are suitable for the installation of ventilation channels with low pressure (800-5000 Pa) and low speedair flow (30 m / s).

rank in terms of assembling ↑

sure to include any ventilation ducts: the installation of their inevitable and is not easy, but it is possible to choose a material that can reduce labor costs.

  • Plastic easier.This quality of the priority and during construction, and during transport and during operation.
  • For mounting channels do not require tools, the ability to keep a heavy load.Sagging channels should not exceed 4%.
  • PVC ducting for ventilation with their hands can be freely cut to the size required for the installation of a complex configuration.Working with metal is much more complicated.
Plastic pipes for ventilation
plastic vent easier to build with their own hands, the pipes are easy to cut, so you can make the ventilation of any complexity, to carry out the corners and joints have special elements, the smooth surface does not create obstacles to the airflow, they almost do not need to be cleaned

Suit Is sewers?↑

for laying ducts produce special plastic products with a diameter of 120 mm.The structure and composition of the material they are similar to sewers, but the cost is almost five times higher in the size and diameter of 110 mm.The forums craftsmen question of whether there can be constructed ventilation of sewer pipes, are actively discussing.Possible, for example, corrugated plastic, with a diameter of 120 mm connected to chimney made of a sewer pipe?

Pipes for ventilation
scheme of mechanical ventilation: 1) ventilation grills on the windows for fresh air intake, 2) exhaust hole for discharging waste air mass, 3) flexible ducts, 4) equipment for the control, 5) output device with a diameter greater than the size of the duct

On Building Regulations output device should be wider.However, many believe that narrowed to 10 mm passage will not affect the functionality of the system.The main thing, according to them, the compound was sealed to ensure that the joint is tightened double sided tape and other insulation materials.Generally move to another Diameter, building ventilation network is not recommended.And in place of the air outlet passage narrowed to obstruct the movement.But if it turns out otherwise, the transition should be smooth, without "steps".

Ventilation of sewers
pipe connection into a single channel should be smooth with no sharp transitions from one diameter to another and "steps»

no accident that so actively consumers are switching to plastic products.They are lighter, cheaper, on technological, aesthetic, and performance parameters ahead of outdated versions of the metal.Weighty addition to the pluses - a rare departure, because the smooth surface of the plastic antistatic clog the duct does not accumulate sediment.