When placed so there is 1-1/2 inches of clearance from the walls

which is 1 millimeter thick

Serves Two Compartments

the unit measures 12 inches in width by 11 inches in height

To leave room to unlock the unit and open the door for refilling

Crown Verity CV-3050-NG Patio Heater, Stainless Steel, Natural Gas With Reflector Capacity 5 L When placed so there isOutdoor Heaters Designed To Extend The Use Of Your Patio, Deck Or Dining Area. Completely Self Contained , Provides Clean Circle Of Warmth, Piezo Ignition System Fail Safe Piezo System, Weather Resistant Construction, 45,000 Hourly Btu'S, Adjustable Heat Output, Csa Approved, High Output & Fuel Efficient Conical Burner