NuTone 9427P Two Bulb Heater with Ventilation Fan, 500-Watt, White N/A Imported Two 250-watt R40 or BR40 size infrared bulbs (not included) provide a total of 500 watts of heat and are required to ensure the warmth you expect Fan and heater can operate independently or together giving you the choice of warmth and ventilation you require, and complete control over your own comfort Compact steel housings with adjustable mounting brackets have keyhole slots that span up to 24, making this a sure fit no matter what distance you find between joists, assisting ease of installation Attractive white polymeric grille is a suitable match for any dcor, no matter how many times you change the paint color Two-function control (sold separately) is required for proper operation; available through NuTone