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Maratherm heat pumps

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

Filters Maratherm
  1. 1 N5H8T48*K*AAA*ACiQ, Airquest + 8 more
    51,500 Btu/hheating at 47°F 49,500 Btu/hcooling at 95°F

    48,000 Btu (4-ton) · Central · 5°F 25,000 Btu/h · Cold output 48–53% · HSPF2 8.1 · 3,888 pairings

  2. 2 N5H8T24*K*AAA*ACiQ, Airquest + 8 more
    24,800 Btu/hheating at 47°F 23,600 Btu/hcooling at 95°F

    24,000 Btu (2-ton) · Central · 5°F 11,100 Btu/h · Cold output 44–46% · HSPF2 8.0 · 4,839 pairings

  3. 3 N5H8T60*K*AAA*ACiQ, Airquest + 8 more
    57,500 Btu/hheating at 47°F 56,000 Btu/hcooling at 95°F

    54,000 Btu (4.5-ton) · Central · 5°F 30,200 Btu/h · Cold output 51–53% · HSPF2 8.0 · 1,164 pairings

  4. 4 N5H8T36*K*AAA*ACiQ, Airquest + 8 more
    38,000 Btu/hheating at 47°F 35,400 Btu/hcooling at 95°F

    36,000 Btu (3-ton) · Central · 5°F 19,000 Btu/h · Cold output 45–51% · HSPF2 8.1 · 2,442 pairings

  5. 5 R5H5S31*K*AAA*ACiQ, Airquest + 9 more
    30,600 Btu/hheating at 47°F 29,200 Btu/hcooling at 95°F

    30,000 Btu (2.5-ton) · Central · 5°F 14,000 Btu/h · Cold output 45–46% · HSPF2 8.0 · 382 pairings

  6. 6 R5H5S19*K*AAA*ACiQ, Airquest + 9 more
    19,500 Btu/hheating at 47°F 19,200 Btu/hcooling at 95°F

    18,000 Btu (1.5-ton) · Central · 5°F 8,400 Btu/h · Cold output 43–44% · HSPF2 8.0 · 749 pairings

  7. 7 N5H5S24*K*AAA*ACiQ, Airquest + 9 more
    23,800 Btu/hheating at 47°F 24,200 Btu/hcooling at 95°F

    24,000 Btu (2-ton) · Central · 5°F 11,400 Btu/h · Cold output 47–54% · HSPF2 7.8 · 1,985 pairings

  8. 8 R5H5S24*K*AAA*ACiQ, Airquest + 9 more
    23,800 Btu/hheating at 47°F 24,200 Btu/hcooling at 95°F

    24,000 Btu (2-ton) · Central · 5°F 11,400 Btu/h · Cold output 47–54% · HSPF2 7.8 · 1,988 pairings

  9. 9 PHB560000K000BAirquest, Arcoaire + 9 more
    55,500 Btu/hheating at 47°F 56,000 Btu/hcooling at 95°F

    54,000 Btu (4.5-ton) · Central · 5°F 25,800 Btu/h · Cold output 46% · HSPF2 7.7 · 11 pairings

  10. 10 PHR548000K***K1ACiQ, Airquest + 9 more
    45,000 Btu/hheating at 47°F 47,000 Btu/hcooling at 95°F

    48,000 Btu (4-ton) · Central · 5°F 18,200 Btu/h · Cold output 40% · HSPF2 7.2 · 11 pairings

  11. 11 PHR536000K***K1ACiQ, Airquest + 9 more
    34,400 Btu/hheating at 47°F 34,200 Btu/hcooling at 95°F

    36,000 Btu (3-ton) · Central · 5°F 12,700 Btu/h · Cold output 37% · HSPF2 7.2 · 11 pairings

  12. 12 N5H5S60*K*AAA*ACiQ, Airquest + 9 more
    55,500 Btu/hheating at 47°F 57,000 Btu/hcooling at 95°F

    54,000 Btu (4.5-ton) · Central · 5°F 28,600 Btu/h · Cold output 52% · HSPF2 7.8 · 11 pairings

  13. 13 R5H5S60*K*AAA*ACiQ, Airquest + 9 more
    55,500 Btu/hheating at 47°F 57,000 Btu/hcooling at 95°F

    54,000 Btu (4.5-ton) · Central · 5°F 28,600 Btu/h · Cold output 52% · HSPF2 7.8 · 11 pairings

  14. 14 N5H5S48*K*AAA*ACiQ, Airquest + 9 more
    46,500 Btu/hheating at 47°F 46,500 Btu/hcooling at 95°F

    48,000 Btu (4-ton) · Central · 5°F 24,400 Btu/h · Cold output 50–52% · HSPF2 7.8 · 53 pairings

  15. 15 R5H5S48*K*AAA*ACiQ, Airquest + 9 more
    46,500 Btu/hheating at 47°F 46,500 Btu/hcooling at 95°F

    48,000 Btu (4-ton) · Central · 5°F 24,400 Btu/h · Cold output 50–52% · HSPF2 7.8 · 53 pairings

  16. 16 N5H5S42*K*AAA*ACiQ, Airquest + 9 more
    40,500 Btu/hheating at 47°F 42,500 Btu/hcooling at 95°F

    42,000 Btu (3.5-ton) · Central · 5°F 19,900 Btu/h · Cold output 49% · HSPF2 7.8 · 43 pairings

  17. 17 R5H5S42*K*AAA*ACiQ, Airquest + 9 more
    40,500 Btu/hheating at 47°F 42,500 Btu/hcooling at 95°F

    42,000 Btu (3.5-ton) · Central · 5°F 19,900 Btu/h · Cold output 49% · HSPF2 7.8 · 43 pairings

  18. 18 N5H5S36*K*AAA*ACiQ, Airquest + 9 more
    33,800 Btu/hheating at 47°F 34,400 Btu/hcooling at 95°F

    36,000 Btu (3-ton) · Central · 5°F 17,500 Btu/h · Cold output 48–54% · HSPF2 7.8 · 312 pairings

  19. 19 R5H5S36*K*AAA*ACiQ, Airquest + 9 more
    33,800 Btu/hheating at 47°F 34,400 Btu/hcooling at 95°F

    36,000 Btu (3-ton) · Central · 5°F 17,500 Btu/h · Cold output 48–54% · HSPF2 7.8 · 312 pairings

  20. 20 N5H5S30*K*AAA*ACiQ, Airquest + 9 more
    28,000 Btu/hheating at 47°F 27,600 Btu/hcooling at 95°F

    30,000 Btu (2.5-ton) · Central · 5°F 13,500 Btu/h · Cold output 47–48% · HSPF2 7.8 · 64 pairings

  21. 21 R5H5S30*K*AAA*ACiQ, Airquest + 9 more
    28,000 Btu/hheating at 47°F 27,600 Btu/hcooling at 95°F

    30,000 Btu (2.5-ton) · Central · 5°F 13,500 Btu/h · Cold output 47–48% · HSPF2 7.8 · 64 pairings

  22. 22 N4H5S30*K*AAA*Airquest, Arcoaire + 9 more
    28,000 Btu/hheating at 47°F 27,800 Btu/hcooling at 95°F

    30,000 Btu (2.5-ton) · Central · 5°F 12,900 Btu/h · Cold output 46% · HSPF2 7.8 · 11 pairings

  23. 23 R4H5S30*K*AAA*Airquest, Arcoaire + 9 more
    28,000 Btu/hheating at 47°F 27,800 Btu/hcooling at 95°F

    30,000 Btu (2.5-ton) · Central · 5°F 12,900 Btu/h · Cold output 46% · HSPF2 7.8 · 11 pairings

  24. 24 N5H5S18*K*AAA*ACiQ, Airquest + 9 more
    16,700 Btu/hheating at 47°F 18,100 Btu/hcooling at 95°F

    18,000 Btu (1.5-ton) · Central · 5°F 8,400 Btu/h · Cold output 46–52% · HSPF2 7.8 · 505 pairings

  25. 25 R5H5S18*K*AAA*ACiQ, Airquest + 9 more
    16,700 Btu/hheating at 47°F 18,100 Btu/hcooling at 95°F

    18,000 Btu (1.5-ton) · Central · 5°F 8,400 Btu/h · Cold output 46–52% · HSPF2 7.8 · 505 pairings

  26. 26 PHR560000K***K1ACiQ, Airquest + 9 more
    56,500 Btu/hheating at 47°F 56,000 Btu/hcooling at 95°F

    54,000 Btu (4.5-ton) · Central · 5°F 22,200 Btu/h · Cold output 39% · HSPF2 7.5 · 11 pairings

  27. 27 PHB548000K000BAirquest, Arcoaire + 9 more
    44,500 Btu/hheating at 47°F 46,500 Btu/hcooling at 95°F

    48,000 Btu (4-ton) · Central · 5°F 18,200 Btu/h · Cold output 41% · HSPF2 7.2 · 11 pairings

  28. 28 PHB536000K000BAirquest, Arcoaire + 9 more
    34,400 Btu/hheating at 47°F 35,200 Btu/hcooling at 95°F

    36,000 Btu (3-ton) · Central · 5°F 14,100 Btu/h · Cold output 41% · HSPF2 7.2 · 11 pairings

  29. 29 PHR524000K***K1ACiQ, Airquest + 9 more
    23,800 Btu/hheating at 47°F 22,400 Btu/hcooling at 95°F

    24,000 Btu (2-ton) · Central · 5°F 8,600 Btu/h · Cold output 36% · HSPF2 7.2 · 11 pairings

  30. 30 PHB524000K000BAirquest, Arcoaire + 9 more
    23,400 Btu/hheating at 47°F 22,200 Btu/hcooling at 95°F

    24,000 Btu (2-ton) · Central · 5°F 8,400 Btu/h · Cold output 36% · HSPF2 7.2 · 11 pairings

Maratherm 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 N5H8T48*K*AAA* ACiQ, Airquest + 8 more Central 48,000 Btu (4-ton)25,000 51,500 49,500 48–53% 2.15 16.5 8.1 2-stage R-454B US CA 3,888
2 N5H8T24*K*AAA* ACiQ, Airquest + 8 more Central 24,000 Btu (2-ton)11,100 24,800 23,600 44–46% 2.06 16.5 8.0 2-stage R-454B US CA 4,839
3 N5H8T60*K*AAA* ACiQ, Airquest + 8 more Central 54,000 Btu (4.5-ton)30,200 57,500 56,000 51–53% 2.25 16.0 8.0 2-stage R-454B US CA 1,164
4 N5H8T36*K*AAA* ACiQ, Airquest + 8 more Central 36,000 Btu (3-ton)19,000 38,000 35,400 45–51% 2.24 15.5 8.1 2-stage R-454B US CA 2,442
5 R5H5S31*K*AAA* ACiQ, Airquest + 9 more Central 30,000 Btu (2.5-ton)14,000 30,600 29,200 45–46% 2.06 15.5 8.0 1-stage R-454B US CA 382
6 R5H5S19*K*AAA* ACiQ, Airquest + 9 more Central 18,000 Btu (1.5-ton)8,400 19,500 19,200 43–44% 2.00 15.5 8.0 1-stage R-454B US CA 749
7 N5H5S24*K*AAA* ACiQ, Airquest + 9 more Central 24,000 Btu (2-ton)11,400 23,800 24,200 47–54% 2.10 15.5 7.8 1-stage R-454B US CA 1,985
8 R5H5S24*K*AAA* ACiQ, Airquest + 9 more Central 24,000 Btu (2-ton)11,400 23,800 24,200 47–54% 2.10 15.5 7.8 1-stage R-454B US CA 1,988
9 PHB560000K000B Airquest, Arcoaire + 9 more Central 54,000 Btu (4.5-ton)25,800 55,500 56,000 46% 2.00 15.5 7.7 2-stage R-454B US CA 11
10 PHR548000K***K1 ACiQ, Airquest + 9 more Central 48,000 Btu (4-ton)18,200 45,000 47,000 40% 1.95 15.5 7.2 2-stage R-410A US CA 11
11 PHR536000K***K1 ACiQ, Airquest + 9 more Central 36,000 Btu (3-ton)12,700 34,400 34,200 37% 1.77 15.5 7.2 2-stage R-410A US CA 11
12 N5H5S60*K*AAA* ACiQ, Airquest + 9 more Central 54,000 Btu (4.5-ton)28,600 55,500 57,000 52% 2.18 15.2 7.8 1-stage R-454B US CA 11
13 R5H5S60*K*AAA* ACiQ, Airquest + 9 more Central 54,000 Btu (4.5-ton)28,600 55,500 57,000 52% 2.18 15.2 7.8 1-stage R-454B US CA 11
14 N5H5S48*K*AAA* ACiQ, Airquest + 9 more Central 48,000 Btu (4-ton)24,400 46,500 46,500 50–52% 2.28 15.2 7.8 1-stage R-454B US CA 53
15 R5H5S48*K*AAA* ACiQ, Airquest + 9 more Central 48,000 Btu (4-ton)24,400 46,500 46,500 50–52% 2.28 15.2 7.8 1-stage R-454B US CA 53
16 N5H5S42*K*AAA* ACiQ, Airquest + 9 more Central 42,000 Btu (3.5-ton)19,900 40,500 42,500 49% 2.26 15.2 7.8 1-stage R-454B US CA 43
17 R5H5S42*K*AAA* ACiQ, Airquest + 9 more Central 42,000 Btu (3.5-ton)19,900 40,500 42,500 49% 2.26 15.2 7.8 1-stage R-454B US CA 43
18 N5H5S36*K*AAA* ACiQ, Airquest + 9 more Central 36,000 Btu (3-ton)17,500 33,800 34,400 48–54% 2.18 15.2 7.8 1-stage R-454B US CA 312
19 R5H5S36*K*AAA* ACiQ, Airquest + 9 more Central 36,000 Btu (3-ton)17,500 33,800 34,400 48–54% 2.18 15.2 7.8 1-stage R-454B US CA 312
20 N5H5S30*K*AAA* ACiQ, Airquest + 9 more Central 30,000 Btu (2.5-ton)13,500 28,000 27,600 47–48% 2.10 15.2 7.8 1-stage R-454B US CA 64
21 R5H5S30*K*AAA* ACiQ, Airquest + 9 more Central 30,000 Btu (2.5-ton)13,500 28,000 27,600 47–48% 2.10 15.2 7.8 1-stage R-454B US CA 64
22 N4H5S30*K*AAA* Airquest, Arcoaire + 9 more Central 30,000 Btu (2.5-ton)12,900 28,000 27,800 46% 2.10 15.2 7.8 1-stage R-410A US CA 11
23 R4H5S30*K*AAA* Airquest, Arcoaire + 9 more Central 30,000 Btu (2.5-ton)12,900 28,000 27,800 46% 2.10 15.2 7.8 1-stage R-410A US CA 11
24 N5H5S18*K*AAA* ACiQ, Airquest + 9 more Central 18,000 Btu (1.5-ton)8,400 16,700 18,100 46–52% 2.04 15.2 7.8 1-stage R-454B US CA 505
25 R5H5S18*K*AAA* ACiQ, Airquest + 9 more Central 18,000 Btu (1.5-ton)8,400 16,700 18,100 46–52% 2.04 15.2 7.8 1-stage R-454B US CA 505
26 PHR560000K***K1 ACiQ, Airquest + 9 more Central 54,000 Btu (4.5-ton)22,200 56,500 56,000 39% 2.00 15.2 7.5 2-stage R-410A US CA 11
27 PHB548000K000B Airquest, Arcoaire + 9 more Central 48,000 Btu (4-ton)18,200 44,500 46,500 41% 1.80 15.2 7.2 2-stage R-454B US CA 11
28 PHB536000K000B Airquest, Arcoaire + 9 more Central 36,000 Btu (3-ton)14,100 34,400 35,200 41% 1.70 15.2 7.2 2-stage R-454B US CA 11
29 PHR524000K***K1 ACiQ, Airquest + 9 more Central 24,000 Btu (2-ton)8,600 23,800 22,400 36% 1.90 15.2 7.2 2-stage R-410A US CA 11
30 PHB524000K000B Airquest, Arcoaire + 9 more Central 24,000 Btu (2-ton)8,400 23,400 22,200 36% 1.60 15.2 7.2 2-stage R-454B US CA 11

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

30 of 30 units

Other sizes

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