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Old 09-26-2009, 10:59 AM   #1
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Venting a Furnace (Creatively)...

This is my first post and I would really appreciate your support. I am installing a new AC Unit and Furnace. Unfortunately, my previous unit vented through the chimney while at the same time the AC and Furnace duct work also goes throught the same chimney. I believe this is illegal. But if it is possible I would like to keep the duct work in the chimney and find a way to vent the furnace somewhere else. Is it possible to vent the furnace out the wall? Any other ideas?

Joe in Baltimore

(FYI-This is a historic row house in Fells Point, circa 1890)


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Old 09-26-2009, 11:50 AM   #2
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Then you'll need approval from the historical society to side wall vent it.
It will require a power vent if its an 80% furnace.
If its a 90%+ then it can be direct vented out the wall, if you have the clearances.

What efficiency furnace is it.


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Old 09-26-2009, 01:10 PM   #3
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I haven't purchased the furnace yet. But, if it is true that I can vent through the wall with a 90% efficient furnace I would go that way.

Thanks for the reply!
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ductwork , furnace repair

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