4 seasons pro solar powered polycarbonate vent, quietly cools up to 500 sq ft, 400 cfm, hurricane tested tas 100(a) canadagogreen inspired by the solar energy industry and a family business related to builders, canada go green designs, manufactures and distributes energy efficient products for residential and industrial buildings. in 2010, we designed our first attic ventilator powered by a solar panel built for canadian industry. we are committed to creating top quality products, testing all of our models under stringent conditions to meet the highest standards. designed specifically for sloped roofs and severe weather conditions, the 4 seasons pro solar vent’s polycarbonate body will withstand hurricane winds, hail, freezing rain, and more. with a high-efficiency, brushless motor and japanese ball bearings that eliminate vibration and wear, this motor has a lifespan of 15 years. we build our products using mono-crystalline solar panels, one of the highest quality solar cell types in the industry. these efficient solar panels allow our products to work with less than ideal sun exposure. our solar panels are csa approved, meeting and exceeding international standards (iec 61215:2005). the average lifetime of these solar panels is over 25 years. our pro model is tas 100(a) tested under 110 mph wind-driven rain (high velocity hurricane zones testing).