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Westinghouse heat pumps

17 certified models, ranked by seasonal cooling efficiency (SEER2), then heating efficiency (HSPF2), highest first.

Filters Westinghouse
  1. 1 WHZ09SZA21SWestinghouse
    9,000 Btu/hheating at 47°F 9,000 Btu/hcooling at 95°F

    9,000 Btu · Mini-split · 5°F 7,000 Btu/h · Cold output 78% · HSPF2 10.5 · 1 pairing

  2. 2 WHZ12SZA21SWestinghouse
    12,000 Btu/hheating at 47°F 12,000 Btu/hcooling at 95°F

    12,000 Btu (1-ton) · Mini-split · 5°F 8,400 Btu/h · Cold output 70% · HSPF2 9.8 · 1 pairing

  3. 3 WHS09SZB21SWestinghouse
    9,000 Btu/hheating at 47°F 9,000 Btu/hcooling at 95°F

    9,000 Btu · Mini-split · 5°F 5,400 Btu/h · Cold output 60% · HSPF2 9.0 · 1 pairing

  4. 4 WHP18SZA21SWestinghouse
    18,000 Btu/hheating at 47°F 18,000 Btu/hcooling at 95°F

    18,000 Btu (1.5-ton) · Mini-split · 5°F 12,700 Btu/h · Cold output 71% · HSPF2 8.6 · 1 pairing

  5. 5 WHP09SZA21SWestinghouse
    9,000 Btu/hheating at 47°F 9,000 Btu/hcooling at 95°F

    9,000 Btu · Mini-split · 5°F 6,300 Btu/h · Cold output 70% · HSPF2 9.0 · 1 pairing

  6. 6 WHP24M3A21SWestinghouse
    24,000 Btu/hheating at 47°F 24,000 Btu/hcooling at 95°F

    24,000 Btu (2-ton) · Mini-split · 5°F 24,000 Btu/h · Cold output 100% · HSPF2 8.8 · 2 pairings

  7. 7 WHU18SZA21SWestinghouse
    18,000 Btu/hheating at 47°F 18,000 Btu/hcooling at 95°F

    18,000 Btu (1.5-ton) · Mini-split · 5°F 13,200 Btu/h · Cold output 73% · HSPF2 10.0 · 1 pairing

  8. 8 WHU12SZA21SWestinghouse
    12,000 Btu/hheating at 47°F 12,000 Btu/hcooling at 95°F

    12,000 Btu (1-ton) · Mini-split · 5°F 8,500 Btu/h · Cold output 71% · HSPF2 9.5 · 1 pairing

  9. 9 WHP24SZA21SWestinghouse
    23,000 Btu/hheating at 47°F 23,000 Btu/hcooling at 95°F

    24,000 Btu (2-ton) · Mini-split · 5°F 18,000 Btu/h · Cold output 78% · HSPF2 8.6 · 1 pairing

  10. 10 WHP36M4A21SWestinghouse
    32,000 Btu/hheating at 47°F 32,000 Btu/hcooling at 95°F

    30,000 Btu (2.5-ton) · Mini-split · 5°F 36,000 Btu/h · Cold output 113% · HSPF2 9.0 · 2 pairings

  11. 11 WHS18SZB21SWestinghouse
    18,000 Btu/hheating at 47°F 18,000 Btu/hcooling at 95°F

    18,000 Btu (1.5-ton) · Mini-split · 5°F 13,400 Btu/h · Cold output 74% · HSPF2 9.8 · 1 pairing

  12. 12 WHP18M2A21SWestinghouse
    18,000 Btu/hheating at 47°F 18,000 Btu/hcooling at 95°F

    18,000 Btu (1.5-ton) · Mini-split · 5°F 18,000 Btu/h · Cold output 100% · HSPF2 9.5 · 2 pairings

  13. 13 WHU09SZA21SWestinghouse
    9,000 Btu/hheating at 47°F 9,000 Btu/hcooling at 95°F

    9,000 Btu · Mini-split · 5°F 7,100 Btu/h · Cold output 79–92% · HSPF2 9.5 · 2 pairings

  14. 14 WHP42M5A21SWestinghouse
    41,000 Btu/hheating at 47°F 41,000 Btu/hcooling at 95°F

    42,000 Btu (3.5-ton) · Mini-split · 5°F 36,000 Btu/h · Cold output 86–88% · HSPF2 8.9 · 2 pairings

  15. 15 WHS30SZB21SWestinghouse
    30,000 Btu/hheating at 47°F 30,000 Btu/hcooling at 95°F

    30,000 Btu (2.5-ton) · Mini-split · 5°F 21,400 Btu/h · Cold output 71% · HSPF2 8.0 · 1 pairing

  16. 16 WHU24SZA21SWestinghouse
    24,000 Btu/hheating at 47°F 24,000 Btu/hcooling at 95°F

    24,000 Btu (2-ton) · Mini-split · 5°F 19,000 Btu/h · Cold output 79% · HSPF2 10.0 · 1 pairing

  17. 17 WHM48SZA21SWestinghouse
    42,000 Btu/hheating at 47°F 42,000 Btu/hcooling at 95°F

    42,000 Btu (3.5-ton) · Central · 5°F 34,600 Btu/h · Cold output 82% · HSPF2 8.6 · 1 pairing

Westinghouse heat pumps, ranked by seasonal cooling efficiency (SEER2), then heating efficiency (HSPF2)
# Model Brands Type Size At 5°FBtu/h · heating At 47°FBtu/h · heating At 95°FBtu/h · cooling Cold output% of 47°F rating COP 5°Ffull speed SEER2median pairing HSPF2Btu/Wh · median pairing Compressor Refrigerant Market Pairings
1 WHZ09SZA21S Westinghouse Mini-split 9,000 Btu7,000 9,000 9,000 78% 2.10 27.5 10.5 Variable R-410A US CA 1
2 WHZ12SZA21S Westinghouse Mini-split 12,000 Btu (1-ton)8,400 12,000 12,000 70% 1.75 23.5 9.8 Variable R-410A US CA 1
3 WHS09SZB21S Westinghouse Mini-split 9,000 Btu5,400 9,000 9,000 60% 2.10 22.5 9.0 Variable R-32 US CA 1
4 WHP18SZA21S Westinghouse Mini-split 18,000 Btu (1.5-ton)12,700 18,000 18,000 71% 1.80 22.5 8.6 Variable R-410A US CA 1
5 WHP09SZA21S Westinghouse Mini-split 9,000 Btu6,300 9,000 9,000 70% 1.80 22.0 9.0 Variable R-410A US CA 1
6 WHP24M3A21S Westinghouse Mini-split 24,000 Btu (2-ton)24,000 24,000 24,000 100% 1.84 21.5 8.8 Variable R-410A US CA 2
7 WHU18SZA21S Westinghouse Mini-split 18,000 Btu (1.5-ton)13,200 18,000 18,000 73% 2.36 20.5 10.0 Variable R-410A US CA 1
8 WHU12SZA21S Westinghouse Mini-split 12,000 Btu (1-ton)8,500 12,000 12,000 71% 2.30 20.5 9.5 Variable R-410A US CA 1
9 WHP24SZA21S Westinghouse Mini-split 24,000 Btu (2-ton)18,000 23,000 23,000 78% 1.75 20.5 8.6 Variable R-410A US CA 1
10 WHP36M4A21S Westinghouse Mini-split 30,000 Btu (2.5-ton)36,000 32,000 32,000 113% 1.84 20.3 9.0 Variable R-410A US CA 2
11 WHS18SZB21S Westinghouse Mini-split 18,000 Btu (1.5-ton)13,400 18,000 18,000 74% 2.40 20.0 9.8 Variable R-32 US CA 1
12 WHP18M2A21S Westinghouse Mini-split 18,000 Btu (1.5-ton)18,000 18,000 18,000 100% 1.84 20.0 9.5 Variable R-410A US CA 2
13 WHU09SZA21S Westinghouse Mini-split 9,000 Btu7,100 9,000 9,000 79–92% 2.18 19.3 9.5 Variable R-410A US CA 2
14 WHP42M5A21S Westinghouse Mini-split 42,000 Btu (3.5-ton)36,000 41,000 41,000 86–88% 1.84 19.0 8.9 Variable R-410A US CA 2
15 WHS30SZB21S Westinghouse Mini-split 30,000 Btu (2.5-ton)21,400 30,000 30,000 71% 2.00 19.0 8.0 Variable R-32 US CA 1
16 WHU24SZA21S Westinghouse Mini-split 24,000 Btu (2-ton)19,000 24,000 24,000 79% 2.20 18.5 10.0 Variable R-410A US CA 1
17 WHM48SZA21S Westinghouse Central 42,000 Btu (3.5-ton)34,600 42,000 42,000 82% 1.94 15.6 8.6 Variable R-410A US 1

The share is heat output at 5°F divided by the 47°F rating. Tests use different compressor speeds.

17 of 17 units

Other sizes

Every size class, with how many units it holds and its median heat output at 5°F