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Every house has some sort of ventilation, be it through leaky sash windows, cracks in Victorian plaster or active fans.  Without a doubt one of the most important steps in low energy building design is the ventilation strategy and greentomatoenergy has experience designing and installing passive and active ventilation systems. 

Once a house has been made airtight and all of the small holes allowing air to escape are closed off, it is possible to control the flow of air and install a mechanically ventilated heat recovery unit (“MVHR” to its friends) which captures heat from outgoing air and uses it to preheat air coming into the house.

What’s so great about draught proofing and heat recovery?

• allows you to live in a much more comfortable environment - say goodbye to sitting next to draughty windows and doors
• recovers up to 94% of the heat from the outgoing air
• filters keep out pollen and other airborne nasties
• reduces condensation and dampness
• bad odours are whisked away - no more pongy bathrooms or kitchens
• the system is so efficient that not only is the air in your building much fresher, but your building will stay much warmer too
• saves money on your bills - 60% of energy bills are spent on heating your building