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Furnace Replacement 80% vs. 90%??

From: bhinders@msn.com
Category: Select Category From List....
Remote Name: 67.248.70.55
Date: 09 Apr 2004
Time: 11:38 PM

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I recently bought a home that has a 90% eficient furnace that is vented via PVC through the roof. I have been told this is not right, that it should be vented through the wall. An 80% efficient furnace can be vented through the roof. Is this true? Are there requirements or rules for venting/exhuasting? Thanks

 

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