No Cold Air Return.

 
Thread Tools Search this Thread Display Modes
Old 01-02-2009, 07:36 AM   #1
Pro
 
Wolfgang's Avatar
 
Trade: Painting & Remodeling
Join Date: Nov 2008
Posts: 514
Rewards Points: 500

No Cold Air Return.


House was built in 1924 and has cold air returns throughout the first floor. Prior owner(s) decided to finish attic and ran Furn/AC duct to it. No cold air returns though. Colder than rest of house in winter, and in the summer have to use a window AC unit and open a window with a small exhaust fan to keep it cool.

I was thinking of putting in an inline (in duct) auxillary fan to push more air up there but am stumped on what to do about the return. Is there a way to have a passive type cold air return to vent to the crawl space or outside? I really dont want to have to run duct through the ceiling and first floor to the basement if I dont have to.
Wolfgang is offline  

Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. ContractorTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

   
 

Old 01-03-2009, 01:40 PM   #2
New Guy
 
HVAC_Ryan's Avatar
 
Trade: Heating, Ventilation, Cooling & Sheet Metal
Join Date: Jun 2008
Location: Alberta
Posts: 29
Rewards Points: 25

Re: No Cold Air Return.


Seems simple but has the door been undercut? Back in the day before returns to every room they did this. Cold air migrated to floor, under door and back down to R/A. How big of a room are we talking?
Personally I'd steer clear of additional penetrations in such and old house. Even with a back draft damper there is infiltration.

__________________
"They must find it difficult...Those who have taken authority as the truth, rather than truth as the authority." - Gerald Massey
HVAC_Ryan is offline  
Old 01-03-2009, 03:40 PM   #3
Pro
 
user38755's Avatar
 
Join Date: Jan 2009
Posts: 337
Rewards Points: 250

Re: No Cold Air Return.


I owned a Craftsman home from 1922 and had the same problem. Right or wrong here's what I did. Insulated duct up through old chimney, no longer in use, with a booster wired in to furnace in basement. This fed two 12x16 rooms through the north wall. For a return I used two 3" PVC pipes cut into approx. 24" pieces and spliced together in side of chimney one by one, twice, for two 3" returns. Both returns I then ran under floor to bathroom on the south, and opened the floor. Used OEM gravity cover from house. Another heat duct and plumbing for bathroom came up from a pocket door cavity below also. Like I said, right or wrong, but it worked well.
user38755 is offline  
Old 01-03-2009, 06:47 PM   #4
Pro
 
Wolfgang's Avatar
 
Trade: Painting & Remodeling
Join Date: Nov 2008
Posts: 514
Rewards Points: 500

Re: No Cold Air Return.


I think I might try going with a louvered door at the bottom of the steps going upstairs. I really dont want to cut into anymore ceilings and floors. If it doesnt work, than on to plan B...which I have no idea what it is at this time.
Wolfgang is offline  
Old 01-04-2009, 02:38 AM   #5
Pro
 
flashheatingand's Avatar
 
Trade: H.v.a.c.
Join Date: May 2008
Location: Boise, Id
Posts: 3,436
Rewards Points: 2,548

Re: No Cold Air Return.


The lack of return may be a contributing problem during the summer months, but I wouldn't think it's the reason that the attic is the coldest part of the house now. I would think that you aren't getting enough supply air & the t-stat location are the major factors. But, as an experiment, you might just leave the door to the area in question open 24/7 to see if that helps with the heating situation (or take it off temporarily). If so, then go with the louvered door.

Just a thought
flashheatingand is online now  
Old 01-13-2009, 05:41 PM   #6
Dr Heat
 
Dr Heat's Avatar
 
Trade: hvac
Join Date: Dec 2008
Location: Mid West
Posts: 508
Rewards Points: 290

Re: No Cold Air Return.


heat rises if it is cold upstairs maybe you need more insulation. Opening the door will rule out the need for a return.

Dr Heat is offline  


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
very cold outside air from cold air return ?? slawek HVAC 3 12-24-2008 08:30 AM
Return Grill in the Basement orson HVAC 7 10-02-2008 11:01 PM
cold air return on slab construction LeroyJnks HVAC 4 07-11-2008 03:08 PM
FDA to declare cold medicines too risky for babies, toddlers eagleandbaby Off Topic (Non Trade) 0 01-17-2008 08:36 AM
Build to order computer daArch Technology 53 11-08-2007 11:35 AM

Join Now... It's Fast and FREE!

I am a professional contractor
I am a DIY Homeowner
Drywall Talk is for
PROFESSIONAL CONTRACTORS ONLY!

At DrywallTalk.com we cater exlusivly to professional contractors who make their living as a contractor. Knowing that many homeowners and DIYers are looking for a community to call home, we've created www.DIYChatroom.com DIY Chatroom is full of helpful advices and perfect for DIY homeowners.

Redirecing in 10 seconds
No Thanks
terms of service

Already Have an Account?