Williams Part # 2509621A - Williams 25,000 Btu Monterey Top-Vented Propane Gas Wall Heater With 70% Afue - Gas Unit Heaters - Home Depot Pro

Williams Direct-Vent Gravity Wall Heater 30,000 BTUH, 66% AFUE, Natural Gas 3003822 - The Home Depot

Williams Direct-Vent Gravity Wall Heater 30,000 BTUH, 66% AFUE, Natural Gas 3003822 - The Home Depot

Williams 22,000 BTU Direct-Vent Liquid Propane Gas Wall Heater 2203821 - The Home Depot

You may only know of Rinnai for their tankless hot water heaters but they also have an extremely efficient line of vent free fan convector gas heaters. The FC824 is a great solution for hard to heat rooms. It includes a convection fan that helps to evenly distribute the 24,000 BTUs (NG; 22,000 BTUs LP) of warmth throughout your space. It features modulating technology which includes a modulating gas valve and variable speed blower.

Rinnai fc824p Vent-Free Propane Heater

Pleasant Hearth Liquid Propane Conversion Safety Pilot Kit SPK100 - The Home Depot

This Comfort Glow direct vent PROPANE gas wall heater is a space saving unit that provides the perfect solution for zone heating. Provides 25,000 Btu's and heats approximately 750 sq. ft. with the included hardware this unit mounts to any exterior wall, and the adjustable vent assembly adjusts to fit walls from 4-1/2 in. to 10 in. thick. With the gas flame completely sealed inside away from all contact with room air, this unit provides comfortable, clean heat when and where you want it.