House full of air
“Home” is always associated with a friendly atmosphere and comfort.
The crucial factor influencing the comfort of the inhabitants is air.
When we breathe it in and out every day, it is easy to forget that it exists.
Any problems with air exchange usually surface when we discover the stale odour usually associated with damp or when the air is too dry and we can feel fatigued and dry eyes or throat.
The modern buildings are quite hermetic, which does not allow for proper air exchange.
The air in the rooms collects various impurities, such as carbon dioxide, dust, pollen or steam.
Excess water condenses on the walls causing dampness, which leads to the development of mould and fungus.
To ensure proper air exchange, a ventilation system is needed.
Ventilation systems can be divided into mechanical, natural and hybrid – which combine these two types.
Lighter, warmer air on the inside is forced away by the cooler, damper air from the outside.
The exchange happens via the grilles and ventilation holes in doors and windows installed in kitchens or bathrooms.
Air-tight windows disrupt the natural air exchange process.
Problems may arise in winter when the temperature difference is higher, which may cool the interiors down too much.
Summertime when the temperatures inside and outside are similar can almost stop the air exchange.
Opening the windows frequently can help a little bit, although it may not be enough to maintain the proper level of humidity.
More effective air exchange are mechanical ventilation systems where air movement is caused by the ventilator fan.
Intake air may be filtered to limit the amount of pollen and other impurities.
Mechanical ventilation systems allow adjusting the intensity of interior airing depending for example on what we do or how many people are present in the room considerably improves the comfort of the inhabitants and guests.
Heat recovery unit
Heat recovery unit due to the heat exchanger inside – extracted air gives off its heat and moisture to the supplied air, intake and offtake air flows connect, but do not mixed.
In winter, as heat exchangers cut down the required amount of energy to keep the air warm, it also is moister despite being dried by the heating system.