ClassicFlame 23II210GRA 23" Infrared Quartz Fireplace Insert 5,200 BTU heater provides supplemental zone heating for up to 1,000 square feet Flame effect can be operated with or without heat, providing the ambiance of a gentle rolling fire all year long Spectrafire flame effect technology offers 5 blue flame brightness settings and an additional setting with a traditional flame effect The infrared heat helps to maintain the natural humidity within the air, resulting in moist, comfortable heat without drying out the room's air Adjustable thermostat allows you to decide the temperature of your room