2 furnaces- one chimney


Old 02-12-03, 06:31 PM
Visiting Guest
Posts: n/a
2 furnaces- one chimney

I have an oil furnace and a air tight wood/coal furnace. Can I have both of them hooked up to the same flue with only one inlet to chimney? Right now I use oil in fall then disconnect and use wood in winter. Thanks for any replies.
Sponsored Links
Old 02-12-03, 08:07 PM
GregH's Avatar
Super Moderator
Join Date: Jan 2001
Location: Manitoba
Posts: 9,937
Upvotes: 0
Received 5 Votes on 5 Posts

Regardless of whether or not it would work, most codes require that if more than one appliance is connected to a single chimney, it must be sized to carry the flue gas from all the appliances combined.
Old 02-13-03, 06:09 AM
KField's Avatar
Join Date: Dec 2002
Location: Easton, PA
Posts: 3,245
Upvotes: 0
Received 0 Votes on 0 Posts
I would recommend that you continue doing it the way you do now. The alternative would be to put dampers in each one and just close the damper when the unit is not in use. It is frowned on by oil furnace manufacturers to share the flue with another appiliance, but it happens all the time with water heaters. I am more concerned with draft problems than anything. You could consider powerventing the oil furnace. The new powerventers are much better than they were 5 years ago.
Old 02-13-03, 04:03 PM
Visiting Guest
Posts: n/a
Thanks for the feedback. Jim

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes