Attic Ventilation: SolarStar® solar-powered attic fans keep the attic cooler during hot summer months to help reduce air-conditioning costs. In many homes where air conditioning equipment and duct work are located in the attic, hot temperatures can cause the equipment to run longer to remove the additional heat adsorbed. The less run-time of your equipment, the less energy is used saving money. Other benefits may include less maintenance and repair of your HVAC equipment due to less wear and tear. The SolarStar® solar-powered attic fans use sunlight to run a fan keeping your attic cooler during the hottest part of the day. SolarStar® fans come in both roof and gable-mount styles and since it is solar powered, it costs nothing to operate.