AprilAire helps make your home a Healthy Air environment with the ARN25F 6-in. Radon Mitigation Fan. This is the dependable way to deal with elevated radon levels around your new or existing home between 1,500 and 2,500 sq. ft. The quiet, energy-efficient fan connects to PVC piping installed in the soil underneath your home and draws up radon gas to safely exhaust outdoors before it can accumulate in your home. Plus, the fan's patent-pending design has double-snap sealed seams to prevent radon leakage. The AprilAire Radon Mitigation Fan is built to last for both indoor and outdoor installation and its housing resists discoloration to stay white over time. It also boasts a water-hardened, motorized impeller and a thermally protected motor for long-term, reliable radon protection.