Inline Radon Duct Fan Comes with Flex Couplings) Size: 4" - Adjustable Speed

A new inline fan from Fantech is about to revolutionize the radon mitigation industry, setting new standards for owner satisfaction and application specific performance. The new Rn 4-4 and Rn 4-3 do what no other inline radon fan has done to date, which is provide whisper quiet, 24/7-hour operation at a fan speed that can be adjusted to meet the exact depressurization or air flow requirements of a given application. It's quieter, more efficient, and easier to apply than any other sub-slab depressurization method available today..