According to a load analysis, I should have a 1.5 to 2 ton unit where I currently have a 3 ton outdoor unit and a 4 ton coil in the attic (Goodman).
One of the bids provides two alternatives - replace only the outdoor unit with a 1.5 ton, install a recirculating duct, and drop the fan speed,
use a 1.5 ton outdoor unit and replace the coil with a 2 ton.
I'm being told either will achieve the same results.
The recommendation is to go with Trane 12 SEER because it is so small and won't draw too much power but he could put in a RUUD 14 if I wanted.
This is a unit used to cool an addition over a garage - all super insulated, sealed, shaded, etc. and the load calculation has been confirmed. Location is Dallas.
Any suggestions /opinions?
Change out the indoor and outdoor both with matched and rated units.No way would I put a 1.5 ton on a 4 ton coil.
Pick the brand that you ,or your favorite installation contractor wants,as long it has the features you want!Takes a lot of research to check out All the features of the top of the line systems of each brand,and there is a difference when it comes to the top of the line stuff.
Hes right. The coil would be so big it would trap oil and slug refrigerat. Kill the compressor.