Temp Drops Very Slow In The House - HVAC - DIY Chatroom Home Improvement Forum

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


Thread Tools Display Modes
Old 07-27-2011, 12:15 AM   #1
Join Date: Jul 2011
Posts: 51
Rewards Points: 75

Temp drops very slow in the house

If it is 75 outside and 55 blowing out my vents and it takes 45 minutes to drop from 78 to 77, what are the possibilities of something wrong?

I am guessing insulation and size of the unit would be some.

Filters and coils are very clean and freon is full.


blarose is offline   Reply With Quote
Old 07-27-2011, 11:46 AM   #2
Join Date: Jan 2011
Posts: 78
Rewards Points: 75

Is the home leaky? In the winter does it hold heat? My old home was 1990s construction with none of the drywall running all the way to the floors - so behind the trim I found lots of gaps to cauk.


Mrdippy is offline   Reply With Quote
Old 07-27-2011, 11:49 AM   #3
fabrk8r's Avatar
Join Date: Feb 2010
Location: Iowa
Posts: 849
Rewards Points: 500

Latent heat from excess humidity could be the problem. It may take a while for the humidity level to drop.

Originally Posted by blarose View Post
Filters and coils are very clean and freon is full.
How did you determine proper refrigerant charge?
"The physician can bury his mistakes, but the architect can only advise his clients to plant vines." -- Frank Lloyd Wright
fabrk8r is offline   Reply With Quote
Old 07-27-2011, 12:14 PM   #4
Join Date: Oct 2010
Posts: 275
Rewards Points: 250

Weak air flow ??? .
clocert is offline   Reply With Quote
Old 07-27-2011, 03:05 PM   #5
concretemasonry's Avatar
Join Date: Oct 2006
Location: Minneapolis/St. Paul, Minnesota - Latitude 45.057 Longitude -93.074
Posts: 4,068
Rewards Points: 2,626

When you are changing the temperature in a house, you have mass of warm and humid air to cool. When you address a house and everything in it there is even more mass to heat or cool in the long run. The more mass, the longer it takes - It is called thermal inertia and is something the pink panther never did understand.

My system working hard to get the interior to where I want it and after that it takes so little to maintain it, I do not fiddle with the thermostat and just set it and leave it and do not use the set-back features because my home has a lot of mass and thermal inertia. If it is a nice day, I open windows to get a breeze and fresh air and then close them and the catch-up time is minimal with little load because the temperature of the mass is not affected for a day or so of fresh air.

When it comes to the weather, short term micro-managing is not a good way to go.

concretemasonry is offline   Reply With Quote

Thread Tools
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
Weird wiring in house fdmillion Electrical 13 06-14-2013 06:49 PM
Connecting main house to guest house... hlavine Building & Construction 31 03-28-2012 09:04 AM
Solutions for slow to have hot water at far end of house? vsheetz Plumbing 16 04-29-2011 11:14 PM
Big water leak under house Puzzles Plumbing 4 04-27-2011 02:50 PM
Trane XR12 1.5 ton-Too small for my house? Badfish740 HVAC 7 09-23-2009 05:48 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1