Heat Recovery Ventilation or MVHR
Efficient mechanical ventilation is essential in any building that utilises an airtight passive house system as a suitable source of fresh air is required to permeate through the house.
Efficient mechanical ventilation
Efficient mechanical heat recovery ventilation or MVHR as it is sometimes called, is essential in any building that utilises an airtight passive house system as a suitable source of fresh air is required to permeate through the house. While opening a window does provide a certain level of isolated ventilation, the building’s heat is quickly lost. Heat Recovery Ventilation or MVHR, is an energy recovery and heat exchange, mechanical ventilation system which provides fresh air throughout a passive house. This method of ventilation dramatically improves climate control and air quality, whilst saving significant amounts of energy by reducing heating and cooling demands.
The Heat Recovery Ventilation or MVHR system discreetly supplies a constant supply of fresh heated or cooled air, delivering superior air quality without any unpleasant draughts. This highly efficient MVHR unit allows for the heat contained within exhausted stale air, coming from rooms such as the bathrooms, and the kitchen, to be extracted, cleaned and reused to heat incoming fresh air. Within a Passive House, a minimum 75% of the heat from the exhausted stale air is transferred or ‘exchanged’ to heat the fresh inflowing air by means of the heat exchanger mechanism.
Heat Recovery Ventilation Process
- Warm, stale air is drawn out from the kitchen and bathrooms so it can be directed back towards the HRV unit.
- Fresh, cold external air is drawn in to the HRV unit from the outside.
- Heat from the warm stale air is extracted and used to heat the fresh incoming air. Importantly, this exchange of heat is achieved without crossing and mixing stale and fresh air streams with one another. The now warm fresh air is directed to the bedrooms and living area.
- Stale, cold air is now exhausted out of the building.
Discuss your project with us
MBC specialise in the production of Timber Frame Passive Houses and High Thermal Efficiency Timber Frame Houses throughout the UK, for people looking to benefit from huge energy savings and reduce their heating demands by up to 90%.
Precisely engineered Passive solutions from MBC Timber Frame requiring 90% less energy for space heating and cooling.
Near Passive Builds
MBC Timber Frame’s “optional levels of insulation” applied to a 140mm stud frame. 3 great options delivery differing U-Values.
The MBC Passive Foundation system, suitable for both Passive and Standard timber frame projects.