Exceptional heating capacity of > 70,000 Btu/hr. Օ Large viewing area with 36" wide and 19-1/8" tall opening Firebox assembly is > fully insulated and comes standard with firebrick lining and outside air kit Օ Standard 160 CFM fan with blower control connects directly to stainless steel Heat Tubes for added heat output Ability to control combustion rate and heat output UL safety standards via the air kit and flue damper assembliesՕ A hearth extension is required SL300 Series venting Օ Tested and listed to Heatilator 20-year Buyer Protection Plan > DM Doors Fireside Gas Logs DamperHandle Gasketed...