What is Heat Recovery?
A human being usually consumes about one kilogram of food and two litres of water each day - but at least 15 000 litres of air. Of this, up to 90% may consist of indoor air. For air to be clean to breathe, it has to be replaced with outdoor air every two hours.
An effective ventilation system within a dwelling will protect the building fabric and occupants against potentially harmful condensation and mould growth and other airborne pollutants that are present in today's dwellings.
Heat recovery is a process of continuously preheating incoming cool supply air by warming it with the outgoing exhaust air. Warm air is not simply exhausted through the open window but transfers most of its heat to supply air in a highly efficient heat recovery exchanger before being exhausted. At no time do the airstreams mix as the heat radiates through the plates of the exchanger.
Extract Air
Stale air is contaminated with humidity, toxins and smells extracted from the kitchen, bathroom and toilet. Outlet grilles in toilets and wet room areas, such as the bathroom, en-suite, utility and kitchen allow a constant or demand oriented air flow volume to be extracted.
Supply Air
Fresh air is fed directly from outside into the ventilation system through a filter. The heat taken from the extracted air is used to warm the fresh filtered air in the exchanger and then flows through ducting. By undercutting doors and fitting transfer grilles fresh air circulation is ensured throughout the dwelling.
Watch the Airflow Heat Recovery Video
- Saves energy by reducing heating costs
- Extracts airborne pollutants that can cause allergies and asthma
- Constantly refreshing the internal atmosphere
- Removes condensation and humidity
- Supplies warmed, filtered air to living spaces
The heat recovery exchangers are fitted directly in the ventilation units. This allows the use of heat recovery in all building types with mandatory ventilation, for example! - apartments and family houses, commercial buildings, swimming pools, industrial buildings.
Lately, due to the increasing price of energy, heat recovery is becoming more popular in residential dwellings. Heat recovery exchangers can also be used even in air-conditioned buildings - where during the summer season it serves as "cold recovery" - supplied warm air is cooled by air-conditioned exhaust air.