Quote:
Originally Posted by dstankov
The split is measured at the cold air return vent and at a register, preferably the furthest away from the cold air return.
I would need to verify this, but I believe the blockage referred to a blockage of an air duct feeding a register which in turns causes more cold air to flow at one or more of the other registers and thereby causing an uneven cooling condition. That is the way I understood it.
I'm not a pro and with the exception of a five year period these folks have been servicing my systems since 1994 and they haven't steered me in a wrong direction yet.
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Dave, that's what I expected, and makes sense. While also very important, it's a different issue (or limitation) from what the OP asked about, which is inside versus outside temperatures. In this case they just happen to both be in the 20 F range which could add to confusion.
Thinking back on original question, I live in very hot and humid southeast Texas and my AC at home can cool house to 75 F when it's 105 F outside. And my son's new home which is insulated much better and has an AC that is too large can do even better. The system just has to have enough cooling capacity to meet or exceed the actual load at whatever conditions one wants to operate.
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