Yeah temp drop is probably better depending on how far your closest duct has to run. Lots of heat gain to the ducts in the attic. Our attic runs around 140* in the summer when it's 105*+ outside.
Makes me think more about back age units and running the ducts under the house on pier and beam houses. Much less heat gain there.
Still trying to figure out why your liquid line temp is so cool though... Odd combo but it's hard to argue with results...
I do wonder how the system would work when cooling to normal inside temps. 78* is pretty warm. I would be miserable at that temp. I know I was until I replaced our undersized system. We keep ours set at 73* which puts the warmest area of the house around 76*. When it's really hot and it's 105* to 115* for more than 5 hrs a day I bump it up until around 10 pm when it starts to cool off a little. Even at that our elec bill is around 50% less than it was with the undersized system that struggled on a cool day when it was 95*.
Yes weather here sucks and why we can't wait to move.
|