Abstract: A geothermal heating and cooling system is provided. The geothermal heating and cooling system is used for a house or building structure where the foundation extends to a depth below the ground surface layer and into the ground stable layer. The geothermal heating and cooling system includes insulation provided about outer surfaces of the house or building structure. The geothermal heating and cooling system may also be used in conjunction with water tanks and swimming pools.

Abstract: A flue restrictor to control air flow in a combustion apparatus having an exhaust system that includes a flue. The restrictor has a housing to be attached in the flue. There is a first valve member located in the housing and a second valve member located in the housing. Each valve member is composed of open and closed areas, and cooperates with the other valve member to act as a valve. Movement of one valve member relative to the other controls air flow in the restrictor, and thus in the combustion apparatus. The restrictor provides sensitive control and ease of adjustment in position.