Maximum MERV rating for return air filters

Old 02-03-11, 02:59 PM
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Join Date: Feb 2011
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Maximum MERV rating for return air filters

I have a Goodman CPKE30-18 heat pump paired with an A30-15 air handler that has a Honeywell MERV 13 media filter installed. Return air duct grille area is about 1160 sq. inches. I would like to install filter grilles at the 7 return air grille locations but am worried about excessive airflow restrictions damaging the system. What maximum MERV rating would you recommend the filters in the filter grilles? Would electrostatic filters be a better choice or should I stick to Polyester disposable filters?
Old 02-03-11, 04:57 PM
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Join Date: Dec 2005
Location: VA
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Would not add any more filters to your system! The media filter is fine

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