This great little heater unit is made by a company called Envi that we installed in a small (6x7) mudroom addition from this winter. It has a built in thermostat and works as a convection unit, drawing cool air from below and sending it up to create a circular air flow and maintain a consistent room temperature. We also put in a well insulated and air-sealed entry door in a stairwell to replace a cold and drafty old hollow core door. The door trim is fir to match the existing older trim. True Colors paint store in Montpelier did a fantastic job doing a stain match to the old varnished trim.