Has a 5 year warranty! The soil gas mitigation fan is used to evacuate soil gases like Radon, Methane and other harmful gases emitted from the soil. It comes with 3" collars so it can be used with our Sump Pump Kit™ and Sump Pump Basin. Mitigating soil gases is very important to the health of everyone living in the home.Most soil gases cause a very unpleasant odor even after encapsulation,...