| 摘要 |
This invention is designed to provide a multiple increase in thermal efficiency of an existing conventional fireplace. The device consists of a hollow metal air conveying channel which is designed to fit closely against the inside walls of an existing fireplace without requiring structural modification for installation. When a fire is burning in the fireplace all the exposed surfaces of the air channel become heated. The internal blower and baffle system then direct the entering cool room air to make two horizontal passes through the heated air channel before returning to the room as hot air.
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