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Delta T

1768 Views 5 Replies 4 Participants Last post by  beenthere
What should be the typical temperature difference between the intake and "exhaust" of a split system AC? How much does it depend on the intake temperature? I'm guessing that if the inlet is 40F vs 80F, delta T will be lower.
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I'm talking about cooling.

I recently bought my first home and the HVAC system is very very old. With a 65F return the delta T is only 9 degrees. I'm trying to decide weather to get it serviced and make it last however long it will last, or bite the bullet and get a sweet 16 SEER system and that fat government rebate.
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