Freestanding pellet stoves, such as this Harman XXV model, have a minimal footprint in a room. They can typically be placed 1 to 3 inches from the back wall and 6 to 7 inches from sidewalls.
Because of the heat they generate, pellet stoves should be at least 36 inches from furniture and draperies and placed out of the main foot-traffic areas, especially in households with small children.
The exhaust pipe, which can go straight out an exterior wall or up through the roof or chimney, must be tightly sealed to prevent flue gases from entering the home. A second intake line provides outside air for combustion.
Almost all pellet stoves require a nearby outlet to run the fans, thermostat, and circuit board. If the stove is your sole heater, consider adding a battery backup (about $300) in case your electricity goes out.
Pellet stoves must rest on a noncombustible surface, such as stone or ceramic tile, to guard against errant embers. A pad should extend 6 inches beyond the door.