re: Whats more energy efficient ?

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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.

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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.