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 04-10-2013, 10:34 AM   #1
Member
 
Join Date: Apr 2012
Posts: 153
Share |
Default

Sealing attic furnace room


Hello and I apologize if this was discussed previously. We have our second furnace in the attic space that the builder had built a room around for energy efficiency. It's fully insulated with drywall. The high efficiency dual stage furnace has both intake and exhaust going to the outside through the roof.

I am reading that mechanical rooms with water heater needs additional vent to ensure it gets adequate air for combustion. Does this rule apply to me if I don't have water heater in the attic furnace room?

Thanks!

sbkim is offline   Reply With Quote
Old 04-10-2013, 11:22 AM   #2
Member
 
Join Date: Mar 2012
Location: Lynnwood, WA
Posts: 729
Default

Sealing attic furnace room


You just said the furnace has both intake and exhaust going through the roof and that there's no water heater in there. So, what the problem?

Seattle2k is offline   Reply With Quote
Old 04-10-2013, 11:32 AM   #3
Member
 
Join Date: Apr 2012
Posts: 153
Default

Sealing attic furnace room


Thanks for the reply! Perhaps it's paranoia of reading various posts on this and other forums and my misunderstanding about having adequate combustion air in addition to the air intake from outside.... The room which is sealed with a non louvered door is about 10' x 10' x 7' The BTU of the furnace is 100,000. No other equipment exists. I guess what I am hearing is that I don't need additional vents to let air in from rest of the attic?

This was the article I was reading about having adequate space for combustion which may not apply to me since I have direct vent?

http://staff.jccc.edu/jbennett/curre...ng/COMBUST.htm

Last edited by sbkim; 04-10-2013 at 11:51 AM.
sbkim is offline   Reply With Quote
Old 04-10-2013, 10:00 PM   #4
Member
 
Join Date: Oct 2012
Posts: 273
Default

Sealing attic furnace room


You're correct, you don't need combustion air in the room if the furnace is rated as sealed combustion and installed correctly to meet that specification.
old_squid is offline   Reply With Quote
Old 04-11-2013, 05:03 AM   #5
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 24,735
Default

Sealing attic furnace room


As long as your furnace has its own combustion air intake as you described. The room doesn't require any additional air intake. The link you posted to would apply if your furnace got its combustion air from the room.
__________________
When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions.
beenthere is online now   Reply With Quote
Old 04-11-2013, 08:29 AM   #6
Member
 
Join Date: Apr 2012
Posts: 153
Default

Sealing attic furnace room


Quote:
Originally Posted by beenthere View Post
As long as your furnace has its own combustion air intake as you described. The room doesn't require any additional air intake. The link you posted to would apply if your furnace got its combustion air from the room.
Thanks so much! I guess I got confused with set up in my basement which had water heaters that my inspector required vents be installed.

sbkim is offline   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
Nordyne furnace, error code: Pressure switch stuck closed. javagrendel HVAC 21 03-25-2013 01:14 PM
Ideas for retrofitting baffles/insulation in vaulted ceiling of built out attic room rachelsue20 Insulation 5 04-28-2012 07:49 PM
Quote for new furnace. Reasonable? dengle HVAC 16 03-04-2012 07:01 AM
Water Inside/Around American Standard Furnace michrob HVAC 8 12-08-2011 03:51 PM
Gas furnace in SPF sealed attic dmcmillen HVAC 4 06-27-2009 08:39 PM




Top of Page | View New Posts

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