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MERV stands for minimum efficiency reporting value, and is the standard to rate the overall effectiveness of an air filter. The higher the unit's MERV rating the finer filtration it offers, meaning fewer dust and air particles can pass through.
* Based on sound pressure levels during operation of CBX40UHV-36 with factory installed MERV16 Precision Pleat™media filter and leading competitive three-ton units at equivalent external static pressure when set up per section 4.5.3 of AHRI's test standard. AHRI 260-2001; and efficiency (CFM/Watt) ratings established per AHRI's test standard: ANSI/AHRI 210/240-2008.