Kit makes SolarSheat 1500G or 1500GS (Item#s 456300, 456301, 456302) easy to install. Kit has required hardware to duct air into collector and into your home through an 11 thick wall or roof. For easy installation of SolarSheat 1500G or 1500GS (Item#s 456300, 456301, 456302 Includes gasketing, collars, wall grills, fasteners and a digital DC thermostat Roof flashing and roof mounting hardware not included