Self-powered solar air heater system is designed for small rooms. Helps reduce heating bills. Air is drawn from the room into the collector, heated and blown back into the room with an integrated solar-powered fan. Thermostat controls room temperature. Unit is a supplemental heater and does not replace existing furnace. Approved by the Solar Rating and Certification Corp. (SRCC) for SRCC OG-100 certification. Application: Solar air heater system for small rooms, Dimensions L x W x H (in.): 56 x 43 x 3.8, Panel Type: Aluminum construction with tempered glass panels and insulated backs and sides, Panels (qty.): 1 Can heat a 70-300 sq. ft. room when the sun is shining Reduces 1/6 ton of C02 greenhouse gases per year Mounts easily on south-facing wall or roof Roof mounting requires additional DC fan kit Item# 456305, sold separately Includes thermostat, mount and duct kit