The Napoleon 100-In Alluravision deep wall mount electric fireplace is the largest in its series. This stylish and rich unit can be installed as either a fully recessed fireplace for built-in installations or simply surface mounted using the included hanging bracket. Additional options include standard 120V plug-in or 120/240V direct-wire power supply's. If simply plugging in or direct wiring to 120V, you'll experience 5,000 BTUs of supplemental heat to warm areas up to 400 Sq. Ft. Alternatively, if you hard-wire to 240V, the heat output will increase to 9,000 BTUs for heating areas up to 800 Sq. Ft.