The Key to Energy Efficiency
The seamless, blow-molded polybutlene tank is impervious to rust and corrosion. Multiple layers of filament wound fiberglass give the tank unmatched strength. The tank is designed, built, and warranted not to leak "for as long as you own your home". All plastic tank eliminated the need for an anode rod preventing potential odor problems. Energy factor between .92 - .94 depending on the model.

FV-08VQ5 We have found that Home Performance Contractors use this item frequently after sealing the home tight, they ventilate right!
WhisperCeiling fans feature a totally enclosed condenser motor and a double-tapered, dolphin-shaped bladed blower wheel to quietly move air. This fan is designed to give you continuous, trouble-free operation for many years thanks to its high-quality components and permanently lubricated motors that wear at a slower pace. The electrical configuration of this model's condenser motor allows it to operate at lower temperatures, increasing the life of the motor and bearings, and the housing is made of heavy-gauge zinc galvanized steel and painted to protect it from rust. Rated at .25" water gauge, this fan meets the industry standard for performance for ASHRAE, ENERGY STAR®, LEED for Homes, and HVI.