High Efficiency Furnace Problems And Reviews

Question: Can i vent a high efficiency furnace through the side of my foundation, instead of the chimney?

(Posted by: on 2010-03-07 04:32:57)

Posted by: slg70 on 2010-03-07, 05:03:12

Gasman is right. whoever gave him a thumbs down is wrong.

Posted by: gas man on 2010-03-07, 04:55:00

Yes,2 " pvc with a 90 deg ell at end facing down at least 18 " above ground,if u cant get it 18 " above ground with a straight run u may have to put an ell where it exits foundation and go up to get the 18 ",refer to instructions for number of ells and length,1/ 4 " drop per foot towards furnace

Posted by: diesel whales rule on 2010-03-07, 05:01:59

Define high efficiency, MOST 90+ furnaces and boilers are designed to be vented with PVC pipe. LOOK at your INSTRUCTION MANUAL and see how it is recommended to be installed. there is a change in pipe size around 80K btu from 2 " to 3 " pipe depending on how far you are running your pipe. Follow the directions, or call a contractor to get the best advice, and to be CODE legal

Posted by: No name available on 2010-03-07, 06:50:08

It depends on the area. They can be vented out the wall, but our local codes state that the termination must be more than 15 feet from an opening window. This includes the neighbors house if they are that close together. Then the pvc is run up through a wall and out the roof. Check with your local building department first, cheaper than doing it twice.

Posted by: Bill on 2010-03-07, 07:19:17

2nd confirmation Gasman is exactly right. I agree thumbs down ruling is wrong.