Add a Little Warmth for Those Cold DaysForget about those goose bumps when stepping out of the shower on those cold winter days-this unit is equipped with a heater to add a little warmth when the temperature starts to drop. A tubular stainless-steel-sheathed heating element features Nichrome wire with magnesium oxide for optimal heat transfer and electrical insulation at elevated temperatures.So Quiet You Might Not Know its OnWhisperWarm fans feature a totally enclosed condenser motor and a large double suction blower wheel to quietly move air. A small wheel turning very fast will create more noise than a large wheel turning more slowly for a given airflow. Our fan uses a wide blower wheel that moves a large amount of air at reduced RPMs. The blower wheel is also designed to draw air in from both sides which helps keep the noise down as there is more area for the air to enter the wheel. In fact it is quiet enough that you might not even know its on.Continuous Trouble-free Operation for Many YearsThis fan is designed to give you continuous trouble-free operation for many years thanks in part to its high-quality components and permanently lubricated motors which wear at a slower pace. Also since heat is always detrimental to motor life (the cooler the environment the longer the motor will last) we designed the electrical configuration of this models condenser motor to allow it to operate at lower temperatures increasing the life of the motor and bearings. And the fan housing is made of heavy-gauge zinc galvanized steel and painted to protect it from rust.Energy Star Qualified for Energy SavingsEnergy Star qualified products feature super-quiet operation and high CFM-to-Watt efficiency. The Energy Star program was created to help consumers identify products that can save them money and protect the environment by saving energy. As an Energy Star partner all our fans are Energy Star qualified and labeled accordingly.Tired of Cold Air Coming Through Your Ventilation Fan?This Panasonic fan has a built-in damper to prevent backdraft which helps to prevent outside air from coming through the fan. Also thanks to our efficient cool running motors and fluorescent bulbs it does not create excessive heat-a common problem with recessed lighting fixtures and some competitors fan/light combinations. Loose fill or batt insulation can be placed directly over the fan housing to prevent heat from escaping.