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Old 01-07-2018, 09:01 AM   #76
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Re: System Sizing


[QUOTE=user_12345a;5014114]At 78 it's almost not worth turning on at all.

Overall, it sounds like heating is more of a priority than cooling.

What kind of backup heat do you have? is it a dual fuel or propane/oil or do you have an air handler heat strips?
QUOTE]

Air handler heat strips are used for backup plus I have a pellet stove to take the edge off if it gets too cold.

AC is used in those high humidity times and the temps reach the 90's. If the wife complains I might set it lower in the evenings when sleeping.
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Old 01-07-2018, 10:42 AM   #77
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Re: System Sizing


i would go 3 ton 2-stage for the extra heating capacity.

Unless you can switch to gas if u have it, then you can size for ac only with no operating cost increase.
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Old 01-07-2018, 11:49 AM   #78
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Re: System Sizing


No access to natural gas. I appreciate everyone's input but as you can see there are several opinions out there. I've had several estimates but none of the big companies around here did a load calc and just recommended replacing the current system with 3 tons. Thanks again!
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Old 01-07-2018, 12:24 PM   #79
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Re: System Sizing


Well, the consensus except for one is not to upsize.

The load calc is supposed to tell you what to put in, but with heating, if you downsize it means higher bills due to heat strip use.

Going 2-stage so you're not 40 to 50% oversized for cooling is worth looking into, more money to purchase and repair though.
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