<1 yr old a/c and furnace
Furnace: Carrier Infinity 58MVCO8O
A/C:Carrier Performance 24APA53OA003
Carrier Media Filter Box 16x25
Filter: 4 inch MERV 8 Carrier FILXXCAR0020 (first one said FILXXCAR0016)
-I get the warning to change or clean filter after only about 2 months of use.
-When cooling when I set the fan to high, the airflow does not seem to move all that fast.
-The A/C does not quite keep up (maintain cool enough temp) on 90 degree days
I checked the A/C status with the Infinity controler, here are my results:
Fan set to auto, thermostat temp set to 71, outdoor temp 81, indoor temp 74.
Airflow CFM 875
Coil Temp 81
Outdoor temp 81
Blower RPM 720
Static Pressure .40
If I remove the filter from the cabinet:
Blower RPM drops to 657 and static press drops to .30
I tried setting the fan to high, it didn't change the #s
Correct me if I am wrong, but I think my static press is limiting my airflow, so in order to protect the system the blower never kicks in high RPMs...always under 876 when cooling.
I have already added a return when I had the system installed. Everyone of the installers (some from this forum) said my ductwork was OK.
I can (not so happily) live with the way the system works now (although it does not keep pace like my old oversized system).
1. Do my #s look OK?
2. Would using an even less restrictive filter help (only MERV 8 now)...any suggestions on a filter that would work?