Central A/C temp diff

Does anyone know what the temp difference should be between input and output (register closest to evaporator) air for a properly sized and properly functioning residential central a/c?
Does 20F - 25F sound reasonable 10 minutes after turning the unit on in the morning after being off all night? Note: condenser is in the shade.
The above temp diff looks good to me, but I wanted to get some other opinions.
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It looks excellent, to me.
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On Tue, 07 Aug 2007 07:50:31 -0500, Vic Dura

Properly sized or not the Delta T for an A/C doesn't mean all that much. There are several other readings needed to properly diagnose a system. The delta T could look good for a system but that doesn't mean it is properly sized.
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Vic Dura writes:

It's a good differential, but it is not a conclusive performance test without confirming the proper air flow.
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Without complete operating data, everything would be a WAG.
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kjpro @ usenet.com wrote:

The normal range depending on airflow CFM through the E-Coil per ton of coiling, & the percent of Relative Humidity in your home it could range from say 14-F to 28-F, and yet be within that particular application condition's tolerances. - udarrell
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kjpro @ usenet.com wrote:

The normal range depending on airflow CFM through the E-Coil per ton of cooling, & the percent of Relative Humidity in your home it could range from say 14-F to 28-F, and yet be within that particular application condition's tolerances. - udarrell
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