The Solar Star Conversion Kit boosts performance and lowers noise of existing attic fans. The Solar Star ventilator is powered by a 10-watt photovoltaic solar panel and features a high-performance brushless motor and five-wing injection-molded fan. The unit works continually to maintain low humidity and temperature levels, eliminate wintertime condensation, and keep attic heat from building up in the summer. It requires no electrical hookup. 888.765.2882. www.solatube.com.