| 摘要 |
This invention relate to the field of gas and oil fired building furnaces a nd heating systems. A methods and systems for heat recapturing loop cycle (10) having at least one heat exchanger type coil (11) located in exhaust gas duc t outlet (22), and at least one radiator type coil (15) located in building ai r inlet return duct (16) both (11) & (15) located close to furnace, an exp ansion tank (18) contains water or other applicable fluid in flow circulation withi n metal conduits (13) & (17) connecting said components. The system loop captures waste heat from exhaust duct and increases the air temperature in the return, which result in overall heating system improvement from less burning time of gas or oil.
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