hydrostatic pressure on the underside of the slab or floor and on the walls of the basement and in the process of draining the water from the exterior subterranean surfaces of the dwelling the drain tiles and sump pit will also be accumulating ambient radon therefore the sump pit 33 or drain tile becomes a repository for excess radon and thereby provides an easy opportunity for the disclosed invention to remove the radon from an existing de pressurization point 33 from which to mitigate excessive levels or radon in the dwelling this sump installation will be the least expensive option in most cases because the de pressurization point already exists other optional suction or de pressurization points will add minor cost increases yet the major expense of routing the pipe through the dwelling is still eliminated when installed correctly the disclosed kit draws radon gas out through the de pressurization point by way of the flex duct which is attached to the integrally designed exterior axial fan vent hood combination and exhausts the radon enriched air trough the band board or exterior wall of the dwelling the radon level typically dilutes to a safe level within a few feet of the louver in the hood however the discharge should be at least 10 feet away from any doors opened windows decks patios porches or inhabited areas a complete understanding of the disclosed kit and its intended use is afforded by reference to the drawing fig1 depicts the disclosed kit 10 fully assembled the essential components of the kit include the vent hood 12 the suction pipe 16 and the flex duct 14 also depicted in fig1 is the power cord 27 for operating the axial fan a mundane hose clamp.