Rena Air 100 The Rena Air pumps are very attractive and blend well with any decor. EXTREMELY QUIET; Unique construction of the Rena Air pumps reduces vibrations and residual noises : less than 30 dB at a distance of 1 meter. Unique design: fitting of base to casing guarantees soundproofing. Special extension chambers (Rena Air 200 to 400) absorb vibrations and reduce noise from valves.