To breathe: how to choose the ventilation

How to choose the right air handling unit, which parameters to take into account that you need to know about the recuperators and differ from each other identical at first glance, the model

For their homes FORUMHOUSE participants are increasingly choosing energy-efficient ventilation, which allows you to minimize the cost of electricity. In this article, with the help of a specialist of "Development", the manufacturer of ventilation equipment NAVEKA, we will tell about the features of the modular air handling units, and how to choose them, taking into account the parameters of your home.

Content:

• Criteria for selection of the ventilation unit
• Selecting the installation depending on the type of accommodation
• Strengths and weaknesses of models of air handling units with heat recovery
• When it is compact enough supply installation

How to choose the air handling unit

The ventilation system with air handling units is considered to be the most effective in existence at the present time. Energy consumption when in use reduced to a minimum, and it is very important for FORUMHOUSE users who want to create passive houses. For such people, air handling units with heat recovery "are becoming the standard de facto».

R666a

Member FORUMHOUSE

Other variants either do not provide the desired air parameters or provide, requiring a high operating cost.

What criteria are important when choosing the installation and you need to pay attention in the first place, explains the chief engineer of the company "Development" Victor Pykhachov.

Victor Pykhachov

To select ventilation unit should first calculate the required volumetric flow rate, which will ensure compliance with the rules and create a comfortable atmosphere.

The air flow rate is determined by the multiplicity of air exchange, the number of people staying in the room, by the presence of harmful emissions.

The multiplicity of air exchange in the main living spaces may be drawn from the lowest (0.35 h-1) to a comfortable (1-3 h -1).

Victor Pykhachov

External climatic conditions will affect mainly on the use of additional heating elements. Thus, for regions at a temperature less than -25 outdoors C is recommended to install a pre-heater.

That is not essential for the general ventilation, as is the material of the walls of the house. No "specificity SIP" or "specificity timber" does not have to be taken into account. But the essential is the presence or absence vlagopritoka.

Possible sources vlagopritoka:

• construction materials in newly built housing (they give a substantial vlagopritok);
•  open water sources and wet surface (pool, drying laundry, water the plants);
•  poor-quality waterproofing premises. Victor Pykhachov

Victor Pykhachov

At the time of selection of air handling units is necessary to understand, whether to keep the humidity in the room (to make restitution of moisture) it is necessary or humidity for this type of premises is not desirable.

Depending on the layout of the installation is divided into three types.

Victor Pykhachov

Compact plant maintenance is carried out mainly at the bottom. This point should be taken into account if after installation will settle false ceiling mounting. Panel completely removable compact units - fixing lambs, so even after the installation of the profile of the ceiling, you can still (albeit limited) to open the service door.

How to "read" the components of the installation

When selecting air handling units Our expert advises to pay attention to the ingredients used in them. Much depends on the type of heat exchanger, but other components are equally important. Let us consider the following examples.

installation aluminum plate heat exchanger, Multi-speed snail fan, PTC-heaters, bag filters, built-in automation and remote control.

Victor Pykhachov

aluminum heat exchangermore reliable and durable, than others. The best use for it - in areas where undesirable return of moisture from the exhaust air. It is justified in areas with excessive humidity (saunas, swimming pools ...).

Multispeed incorporating scroll fans run silently and consume little electricity. Self-regulating heating elements based PTC-elements securely heated air does not burn oxygen.

Bag filters have a large surface area, and therefore less resistance and greater durability. The filters are installed differential pressure switch to monitor the clogging: when there is excessive contamination of the remote message appears.

Setting with rotary heat exchanger, PTC-heaters, bag filters, built-in automation and remote control.

Victor Pykhachov

Rotary heat exchanger is more efficient than plate (20-30% on average), andIt saves more heat.In this type of heat exchanger is possible a small flow of the exhaust air to supply air, so it is not recommended for use where the exhaust air has a harmful substance.

Installation with diaphragm plate heat exchanger, Motor-wheels with a transformer speed regulation (they allow you to develop a greater pressure, but Compared with snails have a little more aerodynamic noise), PTC-heaters, cartridge filter, automatic and remote control.

Victor Pykhachov

membrane heat exchangerpermits the return of moisture from the exhaust air.Such an effect is needed in areas where the humidity is very low in the winter, and "returning the moisture" does not bear risk for the microclimate.

Manage the process to set up there. When the relative humidity in the room becomes very low and it can critically affect materials premises or human health, there is a way to maintain a high quality moisture - using moisturizer air.

Material exchanger membrane has a lower mechanical strength, and the probability of substitution can occur for 4-5 year of operation. But this change does not require special skills and high financial costs.

exhaust duct

Getting ventilation arrangement, members of our portal often worried due to possible 'suction of odors and gases "for the outlet of the riser in the exhaust heat recovery channel.

Troer

Member FORUMHOUSE

Tell me, how far on the roof must be observed between the output of the ventilation for the outlet of the riser and outlet exhaust duct heat exchanger? The influx of planning to do in the pediment.

Installing a heat recovery - forced ventilation. If it is operated continuously, no "suction odors and gases" for the outlet of the riser in the exhaust passage impossible.

Victor Pykhachov

If the setting is off, the flow is stopped, and that there was no spontaneous overflow of air from outside into the room, it is recommended the air damper with a drive or check valves that automatically block the airway in the absence of pressure air. And if there is no air overflowing, the distance for the outlet of the riser and outlet hoods exhaust duct heat exchanger is not important.

Inside the exhaust duct, located on the street or in an unheated attic condensation may form. Such duct sections should be insulated with mineral wool with a minimum thickness of 50 mm.

By choosing the intake grille space for supply air should be treated more thoroughly: near should not be exhausting mines, both on the general exchange and special (from toilets, boilers, and so on. d.).

When compact enough supply installation

With all the advantages of supply and exhaust systems, their use is sometimes excessive - just enough fresh air system, for example, to compensate for a small air flow rate in the boiler room. Such compact ventilation units and convenient to install and to operate.

Victor Pykhachov

If we consider the ready supply installation, it is strongly recommended to stop the choice on the version with built-in automation. Such devices are assembled and tested at the factory, which is the guaranteed result of quality performance. Despite the seeming simplicity, there are many of its nuances, for example, for blowing off the electric heater after installation should be implemented blower off delay.

Usually even professional installers prefer to install with built-in automation, because it is important to quickly and qualitatively carry out their work and not to go to numerous customer complaints, in which something is not working properly.

conclusions

Even a very good installation can spoil incorrect calculations, incorrect installation and illiterate shaped materials selected. The system will work 100% with the following components:

• correct calculation of the entire ventilation system;
• good equipment and materials;
• proper installation.

Pressure must push fan duct network and a bulk diffusers at rated air flow rate.

Victor Pykhachov

We have products like setting with quiet snail small fan pressure and be installed on the basis of the motor-wheel, which is much larger head.

As practice shows, for household installations of small expenditures (up to 500-800 m³/ H) is the optimum one for incorporating scroll fans are low noise quality.

Victor Pykhachov

Regarding the use of the heat exchanger, it can actually result in significant savings, but here it is necessary to focus on the available energy resources.

If you have at home there is no problem with the restriction or price of energy, the heat recovery you definitely nowhere. If you pay for the resources consumed, the heat recovery will give you much to save.

When buying ventilation equipment Naveka big discount for registered users FORUMHOUSE. When you call to call - FORUMHOUSE and your nickname.

On FORUMHOUSE can participate in the discussion air handling units with heat recovery, read the article about especially the ventilation systemsWho arranged for the participants FORUMHOUSE.Vse topics the device and the ventilation operation assembled in the profile section.

Video explains how to construct Ventilation and heating in a straw house.

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