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Efficient furnaces

Posted by Harold Kestenholz - Hydronic Network on February 22nd, 2001 02:57 PM
In reply to oil furnace replace? by Tom Rehwoldt on February 22nd, 2001 01:56 PM [Go to top of thread]

As of 1991, all furnaces had to be more efficient than 80%. there are some that are more than 90% efficient.

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