WhisperValue DC Single Speed Fan, high speed 50/80/100 CFM, <0.3/0.4/0.9 sone, ENERGY STAR -qualified, 2x4 construction, ceiling or wall mount, multi-family
WhisperValue DC Dual Speed Fan, high speed 50/80/100 CFM, low speed down to 30 CFM for continuous operation, <0.3/0.4/0.9 sone, ENERGY STAR -qualified, 2x4 construction, ceiling or wall mount,...