Uneven distribution of air in my house


  #1  
Old 07-11-15, 02:43 PM
T
Member
Thread Starter
Join Date: Jul 2008
Location: montreal
Posts: 27
Received 0 Votes on 0 Posts
Uneven distribution of air in my house

Hi,

I have an hot air heat system and heatpump. The blower of electric furnace distribues the air around the house. My problem is that the air distribution is uneven around the house. The airflow from register in back of the house (also where is the furnace) is a lot stronger than the one in the registers in front of the house.

I've look everywhere I can (the ducts are in the ceiling between the basement and the first floor) and I haven't seen any handle or baffle (??) that can be move to change the airflow. Also, my filter is clean.

Can the blower be ajust to throw more air ?

Is there anything I can check ?

Thanks in advance !
 
  #2  
Old 07-11-15, 03:04 PM
S
Member
Join Date: Feb 2014
Location: USA
Posts: 2,101
Received 0 Votes on 0 Posts
I would close the vent maybe 50% on the one in the back. See if you get more air on the one in the front of the house.
 
  #3  
Old 07-11-15, 03:53 PM
T
Member
Thread Starter
Join Date: Jul 2008
Location: montreal
Posts: 27
Received 0 Votes on 0 Posts
There's no way I can close them. Unless you mean to move the tiny plate of metal inside the register.

EDIT: I've close completly the 5 registers at the back of the house...no change at all to those on the front.
 

Last edited by tostaky; 07-11-15 at 05:54 PM.
  #4  
Old 07-12-15, 03:55 AM
F
Member
Join Date: Mar 2006
Location: Wet side of Washington state.
Posts: 18,495
Received 36 Votes on 28 Posts
Unfortunately, this is an all too common problem and it is a problem with the ductwork. For at least the last thirty years it has been a practice to simply install ductwork by "rules of thumb" rather than actually design the system. The result is almost always undersized ducts and then airflow problems. The problem is compounded when the builder then modifies the ductwork to allow for other structural components in the building. As another cost cutting measure balancing dampers in the ducts are rarely installed anymore and this makes balancing the system all but impossible. Using the louvers on the register to try to balance the system usually fails and in addition will often increase the noise of the system.

While you could maybe speed up the blower somewhat to help alleviate the problem, that introduces other problems such as increased noise, lower temperature differential across the heat exchanger and higher operating costs.
 
  #5  
Old 07-12-15, 06:39 AM
T
Member
Thread Starter
Join Date: Jul 2008
Location: montreal
Posts: 27
Received 0 Votes on 0 Posts
So I guess there's nothing I can do ?
 
  #6  
Old 07-12-15, 08:02 AM
B
Member
Join Date: Oct 2008
Location: New England
Posts: 10,524
Received 37 Votes on 34 Posts
Insulating and air sealing all duct is always a good improvement and will at least help the delivered air arrive at closer to the departure temperature.

Have you checked (or I messed it) to see if that fan has a higher speed option?

Bud
 
  #7  
Old 07-13-15, 08:21 AM
S
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 19,635
Received 98 Votes on 86 Posts
Bud just touched on the thing I was thinking - have you checked the ductwork to see if it's leaking air?
 
  #8  
Old 07-14-15, 08:09 PM
T
Member
Thread Starter
Join Date: Jul 2008
Location: montreal
Posts: 27
Received 0 Votes on 0 Posts
I dont know how or where to look if the fan have other speeds options. About leak in the ductwork, like I've said the ductwork is between my basement and first floor and the only way to have access to it would be to destroy me basement ceiling.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: