An ideal choice for heating larger rooms with just one heater--two heaters behind a single grille quickly heat a large area and help eliminate drafts and cold spots in your open areas, such as a foyer. The Com-Pak Twin fan-forced in-wall electric heater features a recess-mount design that requires minimal wall space - ideal for renovations or new construction. A simple and affordable way to add extra warmth to any living space, this product is an interior replacement heater assembly only with a built-in thermostat. A full heater unit requires a wall can and grille sold separately.