The FP-35 can be installed as a freestanding stove or a fireplace insert. It heats 500 - 1,600 square feet, with a maximum heat output of 35,000 BTUs. Its black control panel turns to colored control icons when touched. The user has six heat settings, thermostatic or manual control, noise level, and automatic or manual control of combustion air supply. The stove dimensions are 22.25" width, 28.5" height, 25.19" depth. There is a full size ash drawer in the pedestal base. The insert dimension are 22.63" width, 18.19" height, 25.5" depth; it requires a minimum fireplace opening of 23" width, 20" height, 24" depth. Either unit may be vented with 3" or 4" pellet vent.