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Are Fujitsu and WeatherKing heat pumps the same?

16 model numbers are listed under both Fujitsu and WeatherKing. For 4 of them the certified record is the same record under each brand.

  • 16 shared model numbers
  • 4 identical records
  • 12 records that differ
  • Updated Oct 17, 2026

How much of each range overlaps

Each brand's range, and how much of it is shared with the other
Brand Units in the certified data Certified combinations Share of its range that is shared
Fujitsu 130 433 12.3%
WeatherKing 20 419 80%

“Share of its range” is shared model numbers divided by that brand's own units. The two shares differ because the two ranges are different sizes. One row per unit (a certified model number), not per brand entry.

The model numbers they share

16 of 16 shown

Model numbers listed under both brands. The 5°F figure is the median across that unit's own certified pairings.

Model numbers listed under both Fujitsu and WeatherKing
Model number Size class TypeHeat at 5°FBtu/hkW COP at 5°F Pairings Fujitsu WeatherKing Same record Cold climate
WP15AZ60AJ2N 54,000 Btu (4.5-ton) central 30,600 2.30 8 1 1 Identical Yes
WP14AY60AJ2N 54,000 Btu (4.5-ton) central 25,800 2.05 43 7 16 Differs NC
WP15AZ48AJ2N 48,000 Btu (4-ton) central 24,200 2.20 10 1 2 Identical Yes
WP15AY48AJ2N 48,000 Btu (4-ton) central 23,000 2.20 8 1 1 Identical Yes
WP15AZ42AJ2N 42,000 Btu (3.5-ton) central 20,400 2.10 10 1 2 Identical Yes
WP14AY42AJ2N 42,000 Btu (3.5-ton) central 19,900 2.10 28 4 12 Differs NC
WP15AY42AJ2N 42,000 Btu (3.5-ton) central 18,900 2.00 328 57 127 Differs Yes
WP15AY36AJ2N 36,000 Btu (3-ton) central 18,600 2.00 311 2 146 Differs NC
WP15AZ36AJ2N 36,000 Btu (3-ton) central 17,800 2.10 14 1 3 Differs NC
WP15AZ30AJ2N 30,000 Btu (2.5-ton) central 16,000 2.10 82 7 32 Differs Yes
WP15AY30AJ2N 30,000 Btu (2.5-ton) central 13,900 1.90 8 1 1 Differs NC
WP15AZ24AJ2N 24,000 Btu (2-ton) central 12,500 2.20 78 7 30 Differs Yes
WP15AY24AJ2N 24,000 Btu (2-ton) central 11,100 2.00 11 1 2 Differs NC
WP15AZ18AJ2N 18,000 Btu (1.5-ton) central 9,300 2.10 55 6 22 Differs Yes
WP15AY18AJ2N 18,000 Btu (1.5-ton) central 8,600 2.00 12 2 2 Differs Yes
WP15AY60AJ2N 54,000 Btu (4.5-ton) central — — 35 1 16 Differs NC

NC not cold-climate certified — not in the certified data

16 of 16 shared model numbers All brand pairs

Updated Oct 17, 2026 · Methodology