Abstract: A wall mounted control device such as a thermostat includes a front panel housing having a plurality of locating elements formed therein which allow the mounting of a display, a keyboard unit and a printed circuit board with respect to each other. The front panel housing includes a latch which engages an edge of the display following placement of the display into position within the front panel housing. The keyboard unit is positioned relative to the latched display. The printed circuit board is snapped into place beneath certain raised elements formed in the periphery of the front panel housing. The front panel housing with the thus assembled display, keyboard unit and printed circuit board therein is aligned and snap fitted to a rear or back housing of the wall mounted device.

Abstract: A fireplace including a heat exchanger beneath the combustion chamber floor. The front panel or surround of the fireplace housing includes a central opening which accesses the combustion chamber. Room air inlets and outlets, which are ducted to the heat exchanger, are horizontally arranged in a duct manifold that is positioned above the front panel opening. By positioning the room air inlets and outlets within the front panel opening rather than in the surround, the entire surround can be faced with marble, brick or other decorative material without having to provide a break therein for the ingress and egress of room air. A fan within the heat exchanger circulates room air in a flow path from the room being heated into the duct manifold inlets, through a first duct and into the heat exchanger, from the heat exchanger and through a second duct, and out through the duct manifold outlets. The fireplace also includes a raiseable hearth overlaying an opening accessing the heat exchanger fan.