04360152 is referenced by 8 patents and cites 12 patents.

An auxiliary boiler is provided for substantially reducing fuel consumption of a conventional forced-air heating system. A boiler tank substantially filled with water is connected by hot and cold water lines to a heat exchanger disposed within the cold air duct of the forced-air heating system. A firebox which extends into the boiler tank is adapted to receive combustible material such as wood for heating the water in the tank. A pump directs hot water from the tank through the hot water line to the heat exchanger whereby cool air moving through the cold air duct is preheated as it passes through the heat exchanger. Heating tubes in communication with water in the boiler tank may extend through the firebox for supporting logs therein. Additional heating tubes may extend through a flue directed upwardly from the firebox through the boiler tank.

Auxiliary heating system
Application Number
Publication Number
Application Date
September 8, 1980
Publication Date
November 23, 1982
Steven J Miller
R.R. 1, Wayland, 52654
Lester E Schlatter
R.R. 1, Wayland, 52654
Zarley McKee Thomte Voorhees & Sease
F24D 1/00
View Original Source