The Rn1 is specifically designed for applications where lower pressure and flow are needed. With a record low power consumption of 20 W, this radon fan is the perfect choice where there is good sub slab communication and lower Radon levels.The fan features a fully sealed plastic housing. The inlet and outlet pieces of the housing are joined via a vibration welding process. The process uses transverse, reciprocating motion under pressure at the point of contact. The friction produces heat that melts the thermoplastic material at the interface. The melted material quickly re-solidifies, resulting in a fused, single piece housing. The fused seam is inherently air tight, very strong and permanent.This air-tight product ensures that efficiency is not lost and contaminants are not spilled due to leakage.