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MVHR is an energy-saving system that enables you to ventilate an energy efficient or airtight home, supplying fresh air whilst avoiding heat loss through open windows, vents and extractor fans.

MVHR stands for Mechanical Ventilation with Heat Recovery and is also known as Heat Recovery Ventilation and Comfort Ventilation. It is typically installed in new build or refurbishment projects.

MVHR uses very little energy, compared to conventional air conditioning systems and can have a very significant impact in terms of reducing energy use, CO2 emissions and heating bills.  

Further benefits include:

      • Improved indoor air quality (IAQ) – odours, pollutants and pollen are filtered out by the system, so it’s great for allergy sufferers
      • Comfortable humidity levels – preventing condensation, mould, mildew, fungus and dust mites
      • Quiet operation
      • Balanced heat distribution throughout a property
      • Minimal maintenance and control – MVHR units run constantly and boost automatically when they detect changes in humidity.

How does MVHR heat recovery ventilation work?

An MVHR system consists of a central heat exchanger which is usually installed in the roof space, and a network of ducting installed within the walls of your home.

Ducting will draw stale and humid air from bathrooms, kitchens and utility rooms. The heat exchanger will extract around 90 per cent of the heat from this air and use it to warm incoming fresh, filtered air which is blown to all rooms by a quiet fan.


Will an MVHR system save me money?

An efficient MVHR system should reduce heating bills by up to 30 per cent because it will retain so much heat compared to a naturally ventilated building.

MVHR systems operate using very small motors to circulate the air. These use the same amount of electricity as a low energy light bulb, costing around 10p per day.