MVHR (Mechanical Ventilation with Heat Recovery)
What is MVHR?
Mechanical Ventilation with Heat Recovery (MVHR) is a whole house ventilation system that supplies fresh air and extracts contaminated or damp air in a property. Air is extracted from the wet rooms, such as kitchens, bathrooms and WC’s. The extracted air is used to heat the incoming air (without mixing with it). Up to 95% of the heat, normally wasted in the vented air, is recovered and re-used. The pre-warmed fresh air is distributed to the other rooms in the property such as bedrooms, lounge, dining rooms etc.

heat pumps
-
The MVHR unit uses low energy. Low noise fans together with low velocity ductwork to minimise system noise, keeps system running costs to a minimum.
-
The running costs are a small fraction of the heating cost saved by the heat recovery.
-
The system runs a low extract/supply level during normal operation, however it goes into boost mode when it detects high humidity levels or is triggered by a light switch or proximity sensor in the 'wet' rooms.
-
During the summer months the heat recovery is by-passed, bringing in cooler fresh air and venting warm air to the outside
-
For those who suffer from sensitivity to airborne pollutants, a filtration system can be optionally incorporated on the inlet air.