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Posted on 8/2/16 at 12:29 pm to Brazos
quote:
It's a 4.5 ton unit for 2050 sq feet. The rule of thumb is 1/2 ton per 500 sq feet. That equals 1/2 ton per 455 sq feet. This is what 3 different AC companies have told me.
To be fair, you did admit you've had blown-in insulation added on top of existing insulation that has helped keep the temperature down and the house more efficient. If your hose is more efficient, you don't need the same size unit.
Posted on 8/2/16 at 12:36 pm to Brazos
quote:The rule of thumb is just that... a rule of thumb. Did you tell any of these AC companies that it only runs for 5 minutes? Actually, have you timed it yourself? Does it do this in the heat of the day? How long does it stay off for?
The rule of thumb is 1/2 ton per 500 sq feet
Anyway, back to your original question, you are much, MUCH better off as far as energy use the less total time the unit runs. If you try to save energy by making it run more, you're not doing it right. The startup current for your compressor is probably only 5X higher than the running current, and it's only for a few seconds. So, at worst, two 5 minutes cycles is about equivalent to one 11 minute cycle in energy use. In other words, you will always be better off the less the unit runs.
Posted on 8/2/16 at 1:09 pm to Brazos
quote:
It's a 4.5 ton unit for 2050 sq feet. The rule of thumb is 1/2 ton per 500 sq feet. That equals 1/2 ton per 455 sq feet. This is what 3 different AC companies have told me.
If the rule of thumb is 1/2 ton per 500 square feet, then that would be 1 ton per 1,000 square feet. You would require a little more than 2 tons of cooling...so a 2.5 ton unit would be more appropriate than a 4.5 ton....unless I've misscalculated.
ETA...for clarification...4.5 tons for 2,050 square feet equals 1 ton per 455 square feet...not 1/2 ton per 455 square feet.
This post was edited on 8/2/16 at 1:19 pm
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