Is there a ratio or difference between return cfm and supply cfm on a package self contained unit. I have a 5 ton unit pulling 430 retrun cfm. i didnt check supply yet. I was gonna til I noticed as I was connecting thermocouples and gauges to get readings, compressor wasnt staying on. Call for cooling at unit was gone also. Turns out the accustat was like 4 ft underneath the frigging diffuser. What moron would put it there. Unless its really hot in there, its gonna short cycle everytime. Im goin back now to move it first, or atleast jump it to get system goin and check readings. But I really dont feel the air movement infront of that evap like I do on other similar units. Is there a ratio of supply/return cfm?