Typical Radon Mitigation System
These pictures depict a typical system in a trilevel home. Original radon testing in this Michigan home gave a reading of 6.1 pCi/l. The post-mitigation reading was 0.7 pCi/l, essentially the same as outside air. The most unusual aspect of this system may be its location -- Canton, Michigan, where very few radon problems have been discovered.
Interior View
There is no sump in this house, so a small radon collector was built under the slab in a rear corner, with the pipe run to the outside. Pressure gauge is on the pipe.
Vacuum Fan
Radonaway GP301 vacuum fan is mounted on the exterior. White rubber couplings top and bottom serve as vibration dampers and permit easy fan removal when it eventually fails. The fan is fastened to the building in this photo; in many homes it is set off by 1/2 inch or so to prevent vibrations through the siding & structure.
PVC Piping
Piping terminates just above the eave, with a 90 degree elbow to divert the exhaust away from the structure. Lettering on pipe will be covered when it is painted.
Exterior View
View of the complete exterior. By terminating the exhaust just under the roofline, but still above the eave (per EPA requirement), the system avoids breaking the architectural envelope. This makes it relatively invisible. Paint or a shroud on the lower portion would further improve the appearance.
That's the gas meter to the right of the fan. On some homes, it produces more noise than the fan!
