Built-in Oxygen Depletion System (ODS) for maximum safety, Diamond mesh front grill for added safety, 30,000 maximum BTU"s, 99, 9% Efficient-All of the heat stays in the room!, Easy, economical installation with no vent or chimney required, Fast, continuous heat for only pennies an hour, No electricity required to light or operate-ensure reliable use even during power failures, Thermostat Control, Available in Natural Gas and Propane Gas, CSA design certified, Color: White, Size: 23-1/2"" H x 26-5/8"" W x 8"" D, SKU: HMREX531