Proper Heat Pump Size

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Old 08-01-04, 10:19 AM
water0627
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Proper Heat Pump Size

Can someone tell me the correct size of a Heat Pump for an 1800 sq. ft. home located in the Gainesville, FL. region? I'm told a minimum 3-ton would do it, but several people have told me a 3 1/2 - ton is the best to go with. My home is a 2001 model, medium rooms with about 10 windows.

Also, is it more important to pay attention to the warranty of the unit rather than the brand name?

Thanks.
 
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Old 08-01-04, 01:50 PM
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What did they come up with on the heatloss and AC load on the home. They for sure should have worked one out for the home. This should tell you what you need. Did you get 3 bids for the same job?????? Also I dont know for there if a heatpump will pay you back are not. Thats like here we use just the strip heaters is all. they dont run that much on heat. look into the V /S blowers and yes the warranties count some have 10 years parts and labor now. you can also look at a hot water recovery unit on the AC thats free hot water down here for almost 8 months.

ED
 
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Old 08-01-04, 02:37 PM
water0627
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V/S blowers?

My current heat pump system is three years old and sized at 2 1/2 ton. It comes on around 3 pm (heat of the day) and runs until 8 pm to cool the home. I had two different technicians tell me there is nothing wrong except that it is under sized. 1 indicated a 3 ton is needed and the other a 3 1/2 ton.

I'm planning on obtaining 5 or 6 quotes on Train, Rheem, Armstrong, and Kenmore models and I'm also attempting to trade in my current unit on this deal. I'm also told to pay attention to Scroll compressors. They also said my interior unit would have to be replaced along with the out door unit so they would be match with each other.

V/S Blowers? Need Imput!

Thanks.
 
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Old 08-01-04, 05:51 PM
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They also said my interior unit would have to be replaced along with the out door unit so they would be match with each other.
For sure they have to match.
A Trane LX19i heat pump will give you a SEER of 17.90 and a HSPF of 8.90 on the heat pump With a two stage cooling and a Three stage heating. If you are going to stay in the home for a time go for the higher seer down here. Also look at the hot water recovery unit it helps more on the seer of a AC unit. http://wwwjacobhac.com/hottap.htm

V/S Blowers? Need Imput!
Is the blower speed works with the heat or ac load at the time. Does a better job of taking the moisture out of the air

ED
 
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Old 08-03-04, 02:09 AM
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Sizing story.
I made the mistake of letting the HVAC company that had been doing maintenance on our old 4-ton Amana heatpump system to install a completely new heatpump system, without getting bids. They are the only HVAC company around here (several counties) that offers 7-days-a-week on-call maintenance.
They put in a 4-ton Carrier 12-SEER heatpump without doing a load calculation, although they knew that we had just replaced our old aluminum slider windows and doors with all new Andersens. At the time, we knew nothing about the all-important requirement for a proper load calculation.
Long story short, the new system promptly caused mold and mildew all over our home, ruining our new interior paint job, etc. The new system would cool quickly, but not run long enough to dehumidify our home.
The 4-ton was simply WAY too large for our remodeled home. We subsequently had Carrier people and three other HVAC companies to do load calculations.
ALL told us that the first nitwits should have done a load calculation because they ALL agreed that they shouldn't have installed one larger than 3-ton.
The people that I have talked to with them, like the variable speed types. (Ours isn't, but it had dual zone controls, which I have disabled...works much better.)
Good Luck!
Mike
 
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