Is There Any Advantage to Adding A Second Return Grill?
I have a 3.5 ton split system with air the handler in the garage and my return grill 20 x 24 x 1 just above the floor. I use a washable filter because I had to change a pleated filer monthly due to clogging, desert dust and parrots. For test purposes only when removing the filter my static presure with mesaurments taken above the evaporator jumped higher with filter removed. Would it be to my advantage to add a second return grill?
Last edited by roberzie; 07-08-2009 at 03:15 AM.
Your current return is sufficient for a 2&1/2 ton system. Yes add another return and your filters will last longer.
Originally Posted by roberzie
Also when your return is undersized you will run at a high static pressure, and high static =dead compressor
and get rid of the washable it is highly restrictive with that filter and the undersized return you are chocking your system
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