The tunnel design places the motor in the center of the air flow for cooler operation, which results in lower amperage draw. All models are BIA approved and rated and meet U.S.C.G. Safety Standards. Blower housing of ABS plastic. Special clips on all hose flanges eliminate the need for hose clamps.

89-754: 3" intake, 3" exhaust with remote mounting bracket. 8" length, 4-3/4" mounted height. 158 CFM.

89-751: 4" intake, 4" exhaust with remote mounting bracket. 5-3/4" length, 4-3/4" mounted height. 240 CFM.