A balanced heat recovery ventilation system (MVHR) works by continuously extracting air from the wet rooms within your property (e.g. kitchens and bathrooms) and simultaneously pulling in fresh air from outside which is filtered, introduced and extracted via a network of ducting.
The heat from the extracted stale air is drawn through an air heat exchanger located within the heat recovery ventilation unit itself and is used to warm the incoming fresh filtered air for the habitable rooms in your property such as living rooms and bedrooms. In some cases up to 95% of the heat generated within your property can be retained.
The system is designed to work continuously on trickle and can be boosted manually or automatically when higher levels of moisture are present (.e.g. when cooking and bathing).
Some systems also offer a summer bypass facility which normally activates during the summer months and allows the heat to exit the property without passing through the air heat exchanger. Depending on the unit specification, this feature can be controlled automatically or via a manual switch.
There are numerous ways in which to enhance your MVHR system by adding an additional heat source to lift the temperature of the incoming air, and also cooling devices to provide an air tempering provision.
Download our Guide-to-Ventilation now. This simple to follow guide is design to help lead you through the selection process.