Residential wall furnaces heat small spaces using a heat exchanger. In size, they are closer to movable space heaters, but in function and capacity they are closer to installed furnaces.
Wall furnaces are commonly used in small apartments and condos. If the vent is directed upward, the furnace can be used in a basement.
III Equipment Options
Some residential wall furnaces can be equipped with ducts through the rear to heat more than one room. Other options include auto-ignition pilots and remote thermostats.
1. Equipment Manufacturer Database
2. Natural Gas Efficiency Consortium
Credit: Empire Comfort Systems