Ventilation with heat recovery

The intake and exhaust fans may slightly improve the situation, but this will increase the consumption of energy in heating the air coming into the room. Most of this energy you can still return using supply and exhaust ventilation system with heat recovery (recuperator).


How to bring the heat?Classic (without heat recovery) mechanical supply and exhaust ventilation system, cold outdoor air enters the room through a system of supply channels and the polluted air directly through the exhaust ducts is derived from home. With him leaving the house and the heat that was used for heating the air during his stay inside the house. If the supply and the effluent to pass through a special heat exchanging element, the heat from the heated air (exhaust flow) will be transferred to the cold air (supply air flow).

Seventy eight million thirty two thousand eight hundred twenty eight


RecuperatorThe heat exchange element is part of a device called a ventilation unit with heat recovery or a heat exchanger. In addition to the heat exchange element in the block, an insulated thermally and acoustically, there are two fans — supply and exhaust, filter and sometimes heater.

For the heat recovery from the air flow apply different heat transfer elements:
cross made of parallel thin plates, made of plastic or aluminum, between which, without mixing, are supply and exhaust flows. The efficiency of these items is about 60%,
countercurrent  have a design that is similar to the cross, but the contact of the air flow device is longer because of the longer flow paths in it. Due to this, the efficiency of these elements has a larger value – up to 90%.
 rotating have the form of a rotating drum , their efficiency reaches 80%.

Fifty three million two hundred ninety four thousand eight hundred forty six


In the summer, when receiving heat from the effluent is not made, in place of a conventional heat exchange element can be installed the summer version of it, through which streams flow without heat exchange, or you can do the bypass channel, the flow does not pass through the device.

The fans create in the system the flow of air. The rotation speed can be adjusted, it usually has three values: normal, low for working at night or during the absence of tenants, and the maximum for intensive airing of the room. Powered by network single-phase current (230 V) via power socket with grounding. To control the fan operation use the device programmed in two modes – day and night.

Inside the tube, which enters the fresh air filter is mountedclass EU7, which holds, for example, fungi spores, pollen and soot. This air purification is sufficient even for Allergy sufferers. Filters are also installed on the exhaust part of the system. However, it is only used in order to protect the heat exchanger from Sora present in the flow leaving the room, so the filter might not be small (class EU3). It is important to remember that the filters need to be regularly changed or cleaned.

The heater is not a mandatory part of the ventilation unit, however, will come in handy when the temperature of outdoor air falls below -10°C, because then the air is heated only to a warm exit stream, it will be too cold to apply it directly into the room. published  


P. S. And remember, only by changing their consumption — together we change the world! ©



See also

New and interesting