Heat saving device
A heat saving device is provided for use in connection with the flue pipe of a stove, furnace, or similar heater. Instead of being exhausted directly into the atmosphere through the flue pipe, hot exhaust gases and other combustion products pass through a heat transfer chamber. An open-ended tube forms the inside wall of the chamber so that heat from the gases and other combustion products passing through the chamber is transferred to the useful air flowing through the tube. A removable shroud open at one end and baffled at the other partially surrounds the outer wall of the heat transfer chamber in spaced relationship to the outer wall, permitting flow of useful air through the space thus formed. The useful air flowing through this space is preheated by heat transferred through the outer wall and subsequently entrained by and mixed with air being blown through the inner tube by a fan. The total volume of useful air heated in this manner is added to the heated air provided by direct heating action of the heater. A two-bladed scraper mechanism is included for removing residue from the inner and outer walls of the chamber through which the combustion products pass.
- Assignee:
- EDB-85-079746
- Patent Number(s):
- US 4488681
- OSTI ID:
- 5755220
- Country of Publication:
- United States
- Language:
- English
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