Any house with a concrete slab floor on the lowest level (basement or
first floor) where the primary Radon source is below the house (virtually all houses with
PRINCIPLE OF OPERATION
A negative pressure field is created below the slab
preventing the entry of Radon Gas into the house.
One or more penetrations are made in the slab and a small
pit is created beneath each penetration. PVC duct pipe is connected to the slab
penetration(s) and is routed unobtrusively (through closets, plumbing chases, or other
unexposed areas) to the suction side of the fan. PVC pipe is then connected to the
pressure side of the fan and routed through the roof using a standard roof flange and
waterproof sealant. The Radon Gas is discharged safely above the roofline.
The PVC vent pipe protrudes slightly above the roof (12") and has the same appearance
as a standard plumbing vent pipe. An electrical outlet is provided for the fan in