SpecDirectory

American Standard / Mitsubishi Electric MUZ-FS18NA***vsWillis MZUHW18KCH21S2-O

Side-by-side heat pump comparison

American Standard / Mitsubishi Electric MUZ-FS18NA***

SEER2

21BTU/Wh

HSPF2

10.7BTU/Wh

Cooling Capacity

17200BTU/hr

Cold Climate

Yes

Cold climate certified

Willis MZUHW18KCH21S2-O

SEER2

21BTU/Wh

HSPF2

10BTU/Wh

Cooling Capacity

17000BTU/hr

Cold Climate

Yes

Cold climate certified

Key differences

The American Standard / Mitsubishi Electric MUZ-FS18NA*** is larger at 17200 BTU/hr versus 17000 BTU/hr.

Efficiency

SpecAmerican Standard / Mitsubishi ElectricWillis
SEER2 (best combination)(BTU/Wh)2121
SEER2 (worst combination)(BTU/Wh)2121
HSPF2 (best combination)(BTU/Wh)10.710
HSPF2 (worst combination)(BTU/Wh)10.710
EER2 (best combination)(BTU/Wh)12.512
COP at 5 °F22.22

Capacity

SpecAmerican Standard / Mitsubishi ElectricWillis
Cooling Capacity (max)(BTU/hr)1720017000
Cooling Capacity (min)(BTU/hr)1720017000
Heating at 47 °F(BTU/hr)1900018000
Heating at 17 °F(BTU/hr)1280015000
Heating at 5 °F(BTU/hr)2240013600

Configuration

SpecAmerican Standard / Mitsubishi ElectricWillis
Product TypeHP - Mini or Multi SplitHP - Mini or Multi Split
Compressor StagingContinuously variableContinuously variable
Cold Climate CertifiedYesYes
Connected CapabilityNoNo
SeriesM-SeriesMultiHeat
Indoor-Unit Combinations Rated11

Refrigerant

SpecAmerican Standard / Mitsubishi ElectricWillis
TypeR-410AR-410A
GWP RatingR-410A (GWP:2088)R-410A (GWP:2088)
View MUZ-FS18NA*** specs →View MZUHW18KCH21S2-O specs →

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