NAPOLEON GVF36 VENT FREE GAS FIREPLACE (ZERO CLEARANCE) 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: Fireplace screen, hood, millivolt remote control valve with built-in adjustable flame/heat control, dual receptacle junction box, double flame burner, oxygen depletion sensor (ODS), piezo ignitor, exclusive PHAZER glowing log set, 20 ft. wire. 30,000 BTU's. TESTED AS A HEATER TO THE UNVENTED HEATING STANDARD ANSI Z21.11.2