High efficiency heating system
CA 1105789 A · Owner: Penner, George G. · Inventors: Penner, George G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention consists of a recirculating hot air or hot water heating system in which the cold atmospheric air entering the combustion chamber of the furnace is preheated by combustion gases before entering the chamber so as to provide, more efficient combustion at a reduced quantity of fuel. The amount of heat obtained from the system for a given amount of fuel, is further enhanced by providing a heat exchanger in which spent return air is again heated in the heat exchanger by the hot combustion gases.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted July 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 28, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.