Conserve mechanical ventilation and heat recovery system

If you've built or renovated an energy efficient home, it may certainly be worth fitting a mechanical ventilation and heat recovery system that exchanges stale indoor air for fresh outdoor air, and recovers heat in the process.

A mechanical ventilation and heat recovery system will extract warm, moist air from rooms such as your kitchen and bathroom via a concealed duct system. 

mechanical ventilation and heat recovery system
25 Maximum lifetime of measure (yrs)

This air is then passed through a heat exchanger which removes any warmth and ducts outside. Fresh outside air is then drawn inside, passed through the heat exchanger which then warms it, and is ducted to the living rooms and bedrooms.

This process removes stale and damp air and pollutants and this is both good for your health, and the integrity of the building.

  • mechanical ventilation and heat recovery system Advantages

  • Will save you money and reduce your energy requirements for heating by re-using the heat that is normally lost via standard extract systems.
  • Reduce the need to open windows to cool and air your home which loses energy.
  • Many systems come with air filters, so they’re helpful in preventing potential allergens entering the house.
  • Your home will be more comfortable as it will be draft free.
  • Condensation is eliminated.
  • mechanical ventilation and heat recovery system Disadvantages

  • You will need to have room to site the MVHR unit. This is normally sited in a fitted in the loft, although it could also be installed in a void in the eaves or ceiling, a cupboard in the kitchen or utility room, or even in the garage.
  • Relatively expensive initial outlay compared with some alternatives.
  • Relies heavily on air tightness of the building so only suitable for new builds or extensively renovated and insulated homes.
  • You will have to replace the filters every 9 to 12 months.

Available with

You can get grants for mechanical ventilation and heat recovery system, below are the schemes this is available with.

* According to data sourced from the Energy Saving Trust website.