Angled Duct On Furnace/plenum - HVAC - DIY Chatroom Home Improvement Forum
Advertisement


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

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Like Tree4Likes
  • 3 Post By yuri
  • 1 Post By Bud9051
Reply
 
Thread Tools Search this Thread
Display Modes
Old 03-30-2020, 01:13 PM   #1
Newbie
 
Join Date: Mar 2020
Posts: 5
Rewards Points: 8
Default

Angled duct on furnace/plenum


Hi -
Wanted to hear you guys opinion on this one. New construction home, HVAC installer placed the furnace too close to the wall with the electric panel, not respecting the 36 inches code at the state I'm at. City inspector rejected, so they moved the furnace 6 inches away and angled the duct to the supply plenum - pictures attached.

Do you guys think that this would impact the system's efficiency by a good amount? My understanding is that it will impact, but not by a considerable amount.

This is bothering more than it should.

I should mention that it's a big ranch, and the baby room at the opposite side of the furnace is getting very little air flow. I ended up closing most of the duct registers. I can't help but blame it on the angle duct at the furnace,

thanks!
Attached Thumbnails
Angled duct on furnace/plenum-20200330_140358.jpg   Angled duct on furnace/plenum-20200330_140405.jpg  
m3rcfh is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-30-2020, 01:37 PM   #2
Hvac Pro
 
yuri's Avatar
 
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 22,428
Rewards Points: 162
Default

Re: Angled duct on furnace/plenum


That offset won't affect anything. It is full size at top and bottom.

Only when it reduces does it restrict airflow. I have installed thousands of furnaces with offsets like that and had no issues.
Bondo, Bud9051 and Gwing21 like this.
__________________
"Cut it twice and it is still too short".
yuri is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-30-2020, 01:49 PM   #3
Member
 
Join Date: Nov 2015
Location: Maine
Posts: 10,645
Rewards Points: 92
Default

Re: Angled duct on furnace/plenum


There is still the other issue you mentioned "the baby room at the opposite side of the furnace is getting very little air flow."
Being a new house the air flow to all rooms should have been part of the design and construction. Get them back and fix it. The solution is not "closing most of the duct registers".

Ask for the duct design, Manual D. The house should also have a manual J for heat loss and gain. That is good information for you to have as part of owning a house.

Bud

PS, I agree Yuri, that offset will have no effect on air flow.
Gwing21 likes this.
__________________
I volunteer my help and opinions, but you are responsible for what YOU choose to do with that information.
Bud9051 is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-30-2020, 03:39 PM   #4
Member
 
Join Date: Nov 2014
Posts: 5,836
Rewards Points: 716
Default

Re: Angled duct on furnace/plenum


Those offsets aren’t going to hurt anything.
Running the furnace with most of the supply vents closed will hurt something. That issue needs to be addressed.
roughneck is online now   Reply With Quote
Old 03-30-2020, 06:19 PM   #5
Newbie
 
Join Date: Mar 2020
Posts: 5
Rewards Points: 8
Default

Re: Angled duct on furnace/plenum


That is very good info guys, thank you!

I am going to talk to them and see if they would send me the Manuals D and J, but duct design is one thing I don't know much about. Does fixing the farthest room problem require re-design of the ducts? I can't imagine how they would fix it
m3rcfh is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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





Top of Page | View New Posts