MVHR

Fresh Air all year around

MVHR (Mechanical Ventilation with Heat Recovery) provides fresh filtered air into a building whilst retaining most of the energy that has already been used in heating the building. Heat Recovery Ventilation is the solution to the ventilation needs of energy efficient buildings. Mechanical ventilation with heat recovery (MVHR), heat recovery ventilation (HRV) or Comfort ventilation are all names for the same thing. A heat recovery ventilation system properly fitted into a house provides a constant supply of fresh filtered air, maintaining the air quality whilst being practically imperceptible.

MVHR works quite simply by extracting the air from the polluted sources e.g. kitchen, bathroom, toilets and utility rooms and supplying air to the ‘living’ rooms e.g. bedrooms, living rooms, studies etc. The extracted air is taken through a central heat exchanger and the heat recovered into the supply air. This works both ways, if the air temperature inside the building is colder than the outside air temperature then the coolth is maintained in the building.

When is MVHR Recommended?

MVHR Systems provide controlled ventilation with slow but constant air movements. In contrast, natural ventilation through background ventilators (trickle vents) is a form of uncontrolled ventilation, which fluctuates with wind speeds, temperatures, internal obstructions, such as the opening or closure of internal doors, trickle vents, blinds and curtains. Therefore, it is recommended to install such systems only in properties with relatively good air tightness. We recommend an airtightness of at least 5 m3/(m2*h) at the pressure test (q50), ideally below 3 m3/(m2*h). Air tightness targets should always be set for new built and refurbishment properties.

SOME ADVANTAGES OF MVHR

Continuous supply of fresh air to provide good indoor air quality

No drastic CO2 peaks

No build up of air pollution, e.g. from carpets, cleaning products or radon

Elimination of bad odours

A controlled air flow path throughout the building, rather than 'by-chance' ventilation

Keeps mould, fungus, dust mites in check

Little energy use to operate the system

Less noise inside (windows can remain closed); undisturbed sleep

To make a positive impact on the environment get in touch and we will explain the benefits of Air Source heating and provide you with a competitive quotation.

Find Out More From Our Experts

Air Source Heat Pumps are ideal for well insulated homes and it is advisable to combine with underfloor heating systems for best savings and year round comfort.