I've been a long time lurker on this great forum and now I could really use some advise.
To begin I have 1800 sq ft with 11 registers (2 in 2 rooms,1 in all others) and a 20X30 return.
I recently replaced my 17 yr old Carrier (38CKB) 3T, which was working fine but the evap was rusting out.
It was replaced with a Carrier 24ABC 3T, 58PHA090 furn, and CSPHP4812 coil.
Now both units were 42K btu, and 88K for the furnace,but the old system had the "N" type coil.
All the "pros" recommended the Slab type for the SE Texas hot and humid climate.
The first thing I've noticed is the new system doesn't seem to have the same "pull" toward the return ?
Also, the output doesn't seem as strong and the rooms get stagnate quickly once the unit shuts off.
The output is cool, but with the old system it would remain comfortable until the next cycle.
Both run about 8 min cycles, and I noticed the old plenum had only 4 outlets compared to 6 on the new install ?
So if all the "specs" match up, and the only variant is the Slab coil versus the "N" coil,could that be the culprit after all ? Perhaps the humidity is now noticeably out of balance ?
The installer is coming back out tomorrow to address my concerns, but any input would be greatly appreciated.