Abstract: Apparatus and methods for a gas furnace are disclosed. The gas furnace includes a variable combustion control which monitors the temperature of the burner and modifies one of the amount of combustion air supplied and the amount of gas fuel supplied to the mixing chamber. The described systems can dynamically accommodate differences in air quality and gas fuel supply to provide an optimum BTU output irrespective of differences in geographic location of usage. The gas furnace can include a dynamic response unit which predicts an optimum rate of heating to maintain a target room temperature, thereby preventing unnecessary shut down and costly re-ignition sequences, and maintaining the gas furnace at an optimum BTU output level.

Abstract: A wall furnace is disclosed in which a secondary heat exchanger is provided to maximize the heat transfer efficiency of the furnace. The secondary heat exchanger faces the room to be heated but is aligned directly behind the primary heat exchanger. The length of the secondary heat exchanger is shortened as compared to the combined length of the combustion chamber and primary heat exchanger so as to reduce inefficiencies due to reheating of the combustion gases and to promote air flow and heat transfer around the secondary heat exchanger. Thus, this configuration provides for two essentially separate circulation circuits for heat transfer and maximum furnace efficiency. Separate heated air deflectors are also provided for each of these circuits. A side venting draft hood is also disclosed.

Abstract: The heat exchanger of a gravity flow wall furnace defines a tortuous, mostly vertical path for the combustion gases to improve heat transfer to the room. The gases are directed upwardly in a combustion chamber and then split into two portions and conducted through two radiators having paths which extend downwardly adjacent to but spaced from the chamber and then upwardly again leading to a flue. The chamber and the radiators are oriented edgewise with respect to the wall so that all can fit within the space between a pair of studdings in a conventional stud wall.

Abstract: A wall-hung cabinet comprising a body portion fixedly attached to a wall. A door is hingedly mounted to said body portion and equipped to independently store items therein. A foldable work bench extends from the bottom body portion of the cabinet. In one embodiment, the bottom of the cabinet is at approximately table height. In another embodiment the cabinet extends practically to the floor. The top of the cabinet is approximately no higher than the reach of an average person. Thus, the wall-hung cabinet provides an ideal and compact unit for storing and making use of craft and hobby tools and apparatus.