Featuring a sleek, clean-face design and a modern, smooth refractory-lined firebox, the WRT4820 adds a touch of sophisticated elegance to any room. Aesthetics Smooth refractory-lined firebox creates a contemporary appearance that exudes style. Single rectangular black door allows for an unobstructed view of the fire. Streamlined Meets EPA Phase II-certified and Washington State emissions requirements (3.7 gr/hr). 55,000 BTU/hr* effectively heats up to 1,500 sq. ft.* Airtight combustion chamber delivers maximum efficiency to ensure steady home heating. Double-air combustion features two controls that allow you to customize the heating of your home, including: Main control for variable heat output Air boost for faster ignition Ease of Operation Efficient air wash system keeps the glass clean, reducing the hassle of maintenance. Heat-resistant handle stays cool to the touch. Burn time is approximately 6–8 hours for long-lasting comfort. Required Venting 6" ASHT+, S-2100+, HT6000+, HT6103+ or AC Chimney Design Versatility Choose between the clean-face panel kit* for a more contemporary design or the louver kit for a traditional look. *Requires gravity air distribution kit EPA-CERTIFIED FIREPLACE COLLECTION EPA-certified wood-burning fireplaces from Superior are expertly designed and crafted from over 30 years of experience creating high efficiency EPA fireplaces. You can count on a lifetime of warmth from our fireplaces with the added bonus of responsible burning.