Broan 70 CFM 2 Bulb Heater/Fan Combination Unit. It is UL listed for 60 °C wiring, retrofits, and type IC. Quiet, highly efficient polymeric blower wheels and polymeric dampers eliminate metallic clatter and prevent backdrafts. Polymeric 4" round duct connectors with tapered sleeves provide easier, positive ducting. Adjustable mounting brackets with keyhole slots span up to 24". Uses 250W BR40 size infrared bulbs (not included). Backed by a 1-year limited warranty.