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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-11-2012, 09:05 AM   #1
Member
 
PoleCat's Avatar
 
Join Date: Sep 2009
Location: Dayton, Ohio
Posts: 1,524
Rewards Points: 730
Default

REALLY hot duct.


The ducts coming off the back of the plenum are almost too hot to hold your hand on while the ones on the front are only warm. Should I be concerned about this? Janitrol 70s vintage gas forced air furnace.

PoleCat is offline   Reply With Quote
Old 10-11-2012, 10:12 AM   #2
Newbie
 
Join Date: Oct 2012
Posts: 4
Rewards Points: 10
Default

REALLY hot duct.


What do you mean by plenum? A plenum is basically a space meant to allow air flow.

I think you mean front and back of the furnace itself? If so, the hot ones are supply to the room and the warm ones are returns.

Too hot to hold starts at about 120F and paper burns at 451F so you're far from hazardous temps - unless the ducts are insulated and that's how hot the insulation is getting - then you're in trouble!

If the supply air is too hot then I'd suspect the air filter being clogged or too restrictive. The slower the air flows through your heat exchanger the hotter the air coming out will be so the less air your filter lets through the hotter the air will be.

How hot is the air blowing into your rooms?

pmeloy is offline   Reply With Quote
Old 10-11-2012, 06:46 PM   #3
Member
 
PoleCat's Avatar
 
Join Date: Sep 2009
Location: Dayton, Ohio
Posts: 1,524
Rewards Points: 730
Default

REALLY hot duct.


No, it is an up flow in the basement. Blower on the floor, firebox, a coil, plenum - metal box with four branchs going out from it at ceiling level. Return air goes into the bottem side of the blower enclosure. The difference in temperature from one side of this plenum to the other just seemed to be extreme to me. Sounds like it is a non issue though. Some outlets upstairs are hotter than others but not by that much.

Last edited by PoleCat; 10-11-2012 at 06:52 PM. Reason: Clarification?
PoleCat is offline   Reply With Quote
Old 10-11-2012, 06:52 PM   #4
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,047
Rewards Points: 3,758
Default

REALLY hot duct.


Probably due to heat exchange design.
beenthere is online now   Reply With Quote
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Repaired HVAC duct. What did I do wrong? What did I do right? SingleGuy HVAC 12 07-07-2012 03:12 PM
?an Insulated Flexible Duct - half attached and half unattached ? tran Roofing/Siding 2 06-21-2012 07:25 PM
Planning on New duct work..any feedback... kilosos2 HVAC 28 01-26-2011 10:21 AM
Metal duct or flex? smokey982 HVAC 6 08-06-2010 07:20 AM
Condensation in Wall: Can I Seal a Dryer Duct With Caulk? xquercus HVAC 5 07-01-2007 03:33 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.