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Dial heat pumps

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

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  1. 1 SZHW18WW230BBEDial
    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 9.2 · 1 pairing

  2. 2 18000Z-23S-230-IDial
    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

  3. 3 18000Z-23S-230-ODial
    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

  4. 4 9000Z-22.5S-230-ODial
    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

  5. 5 SZHW09WW230BBJDial
    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 SZHW12WW115BAGDial
    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 9.5 · 1 pairing

  7. 7 24000Z-03-ODial
    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

  8. 8 MZME24WW3P230BBJDial
    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

  9. 9 12000Z-22S-230-ODial
    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 9.5 · 1 pairing

  10. 10 SZHW12WW230BAJDial
    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 9.5 · 1 pairing

  11. 11 18000-UNI-ODial
    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

  12. 12 SZUN18WW230Dial
    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

  13. 13 12000-UNI-ODial
    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

  14. 14 SZUN12WW230Dial
    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

  15. 15 23400-21S-230-ODial
    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

  16. 16 24000Z-21S-230-ODial
    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

  17. 17 SZHW23WW230BJEDial
    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

  18. 18 36000Z-04-ODial
    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

  19. 19 MZME36WW4P230BAJDial
    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

  20. 20 MZME18WW2P230BAJDial
    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

  21. 21 9000-UNI-ODial
    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

  22. 22 24000-UNI-ODial
    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

  23. 23 SZUN24WW230Dial
    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

  24. 24 9000-19.5S-115-ODial
    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

  25. 25 SZHW09WW115AHEDial
    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

  26. 26 48000-CHP-ODial
    48,000 Btu/hheating at 47°F 48,000 Btu/hcooling at 95°F

    48,000 Btu (4-ton) · Central · 5°F 33,000 Btu/h · Cold output 69% · HSPF2 8.5 · 1 pairing

  27. 27 24000-CHP-ODial
    22,000 Btu/hheating at 47°F 22,000 Btu/hcooling at 95°F

    24,000 Btu (2-ton) · Central · 5°F 16,900 Btu/h · Cold output 77% · HSPF2 9.0 · 1 pairing

Dial 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 SZHW18WW230BBE Dial Mini-split 18,000 Btu (1.5-ton)12,700 18,000 18,000 71% 1.80 22.5 9.2 Variable R-410A CA 1
2 18000Z-23S-230-I Dial 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
3 18000Z-23S-230-O Dial 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
4 9000Z-22.5S-230-O Dial Mini-split 9,000 Btu6,300 9,000 9,000 70% 1.80 22.0 9.0 Variable R-410A US CA 1
5 SZHW09WW230BBJ Dial Mini-split 9,000 Btu6,300 9,000 9,000 70% 1.80 22.0 9.0 Variable R-410A US CA 1
6 SZHW12WW115BAG Dial Mini-split 12,000 Btu (1-ton)8,400 12,000 12,000 70% 1.75 21.7 9.5 Variable R-410A US CA 1
7 24000Z-03-O Dial 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
8 MZME24WW3P230BBJ Dial 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
9 12000Z-22S-230-O Dial Mini-split 12,000 Btu (1-ton)8,400 12,000 12,000 70% 1.75 21.0 9.5 Variable R-410A US CA 1
10 SZHW12WW230BAJ Dial Mini-split 12,000 Btu (1-ton)8,400 12,000 12,000 70% 1.75 21.0 9.5 Variable R-410A US CA 1
11 18000-UNI-O Dial 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
12 SZUN18WW230 Dial 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
13 12000-UNI-O Dial 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
14 SZUN12WW230 Dial 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
15 23400-21S-230-O Dial 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
16 24000Z-21S-230-O Dial 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
17 SZHW23WW230BJE Dial 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
18 36000Z-04-O Dial 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
19 MZME36WW4P230BAJ Dial 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
20 MZME18WW2P230BAJ Dial 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
21 9000-UNI-O Dial Mini-split 9,000 Btu7,100 9,000 9,000 79–92% 2.18 19.3 9.5 Variable R-410A US CA 2
22 24000-UNI-O Dial 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
23 SZUN24WW230 Dial 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
24 9000-19.5S-115-O Dial Mini-split 9,000 Btu6,300 9,000 9,000 70% 1.80 18.5 9.0 Variable R-410A US CA 1
25 SZHW09WW115AHE Dial Mini-split 9,000 Btu6,300 9,000 9,000 70% 1.80 18.5 9.0 Variable R-410A US CA 1
26 48000-CHP-O Dial Central 48,000 Btu (4-ton)33,000 48,000 48,000 69% 1.90 17.5 8.5 Variable R-410A US CA 1
27 24000-CHP-O Dial Central 24,000 Btu (2-ton)16,900 22,000 22,000 77% 2.05 16.5 9.0 Variable R-410A US CA 1

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

27 of 27 units

Other sizes

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