Hello,
We are having an extension which is going to be a solid slab floor. However the exisitng house is suspended floor and requires ventilation. I know you can get a duct from the new external wall, in the ground to the exisitng airbrick.
My question is, how deep below the FFL does the ducting have to be?
Thank you
We are having an extension which is going to be a solid slab floor. However the exisitng house is suspended floor and requires ventilation. I know you can get a duct from the new external wall, in the ground to the exisitng airbrick.
My question is, how deep below the FFL does the ducting have to be?
Thank you
