NAPOLEON GD33NR DIRECT VENT GAS FIREPLACE (ZERO CLEARANCE REAR VENT) Napoleon's Direct Vent Gas Fireplaces do not require a chimney and can be vented directly through a wall or roof. The direct vent draws its combustion air from outside while venting to the same outside atmosphere - thereby not consuming warm house air, nor competing with other appliances and furnaces for combustion air. Direct venting also eliminates drafts and heat loss associated with other fireplaces. Unit Includes: Millivolt remote control natural gas valve with built-in adjustable flame/heat control, dual receptacle junction box, heat resistant ceramic glass, 20ft wire, piezo ignitor, firestop, 4" x 7" x 20" rigid vent, exclusive PHAZER glosing log set and glowing embers. Bathroom and Bedroom approved. Suitable for mobil homes. 22,000 BTU's TESTED AS A HEATER. MEETS DEPARTMENT OF ENERGY REQUIREMENTS AS A WALL FURNACE TESTED TO BOTH ANSI Z21.86, Z21.88 AND CSA 2.32 AND CSA 2.33