Furnace Exhaust To Outdoors - HVAC - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


Thread Tools Display Modes
Old 08-30-2007, 09:26 PM   #1
Join Date: Aug 2007
Posts: 1
Rewards Points: 10

Furnace Exhaust To Outdoors

I recently purchase a brand new home and have a question regarding the proper installation of my gas furnace exhaust plumbing.

The exhaust comes out the top of the furnace and along the basement ceiling out to the back of the house ( as well as the intake ). It runs about 15 ft. along the ceiling from the furnace until it clears a support beam, then goes straight up 1.5 ft. on a 45 degrees then goes another 10 ft. along the ceiling and out of the house. Should the slope or the angle of the exhaust plumbing run down away from the furnace slightly? Or, is level sufficient? The length of the exhaust is about 20-25 ft.

It seems to me that when condensation builds up in the exhaust it will roll back into the furnace. Here is why I think this....

Between the first elbow or 90 fitting that makes the exhaust level above the furnace (which seems too low) and the next elbow that brings it up around the support beam ( the 15 ft. run ) is not level, and in fact slopes slightly toward the furnace!! Not to mention again that after that it goes straight up! I have a bad feeling about this.

I move into the house in three weeks and have a Pre Delivery Inspection coming up. Can anyone who knows HVAC reply with some advice?



celticFC is offline   Reply With Quote
Old 09-01-2007, 01:27 PM   #2
Join Date: Sep 2007
Posts: 3
Rewards Points: 10

hi frank , condensing furnaces already have built in drains to accomodate this drainage as you'll see when u install this system have fun , Jack


rojacman is offline   Reply With Quote

Thread Tools
Display Modes

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Heil Furnace Burner Problem timothyr HVAC 79 02-12-2014 07:01 PM
Gas furnace exhaust vent question nowell HVAC 7 01-30-2012 08:31 AM
Bryant Furnace main burner goes out after 5 seconds Da_Bears HVAC 8 01-03-2012 01:24 AM
Furnace not firing jax HVAC 5 02-22-2009 12:41 PM
Replacing My Furnace, few simple questions compression HVAC 10 02-03-2007 05:00 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1