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Old 07-27-2011, 12:15 AM   #1
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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.


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Old 07-27-2011, 11:46 AM   #2
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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.


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Old 07-27-2011, 11:49 AM   #3
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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
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Old 07-27-2011, 12:14 PM   #4
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Weak air flow ??? .
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Old 07-27-2011, 03:05 PM   #5
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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.

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