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.