Does anyone know the reason that trickle vents can't be used on very airtight buildings?
In Scotland you can't use trickle vents if your house is tighter than 5m3/m2/h. I think this might be different in England though. Other than the fact that you would need 'bigger' trickle vents I can't see any reason why you should be made to install MVHR if you inadvertently build tight.
Thoughts would be much appreciated.
In Scotland you can't use trickle vents if your house is tighter than 5m3/m2/h. I think this might be different in England though. Other than the fact that you would need 'bigger' trickle vents I can't see any reason why you should be made to install MVHR if you inadvertently build tight.
Thoughts would be much appreciated.