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InfinityLiving vs KeplerX heat pumps

Measured against models of the same size and duct type, InfinityLiving scores higher on 5 of the 6 ratings. InfinityLiving has 20 outdoor models, KeplerX has 20 outdoor models. InfinityLiving and KeplerX have no QMID on file and are not ranked.

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CompareData as of updated · sources

Against comparable models

Each cell is the share of same-size, same-type models that the manufacturer’s typical model beats (50% is typical); the higher score is in bold. Raw medians are underneath for context: they depend on which sizes each one makes, so they are not compared.
InfinityLiving and KeplerX on every ratingPeer scores, 0–100 · grey ticks: every ranked manufacturer · shaded: the middle half of each one’s modelsMeasured against models of the same size and duct type, InfinityLiving scores higher on 5 of the 6 ratings.
  • InfinityLiving
  • KeplerX
  • Other ranked manufacturers
Infinity…KeplerX

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingInfinityLivingKeplerX
Efficiency index51% (higher)median —42% (higher)median —
COP at 5°F52% (higher)median 2.0034% (higher)median 1.80
Capacity retention at 5°F44% (higher)median 71%41% (higher)median 60%
HSPF258% (higher)median 9.552% (higher)median 8.5
SEER257%median 19.258%median 17.4
EER242% (higher)median 11.226% (higher)median 10.5
Heating capacity at 5°F55% (higher)median 21,600 Btu/h46% (higher)median 23,200 Btu/h
Outdoor models2020
AHRI certifications2620

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardInfinityLivingKeplerX
CEE 2025 Tier 1 (Split ASHP)75%15 models35%7 models
CEE 2026 Tier 1 (Split ASHP)75%15 models35%7 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)65%13 models25%5 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate70%14 models0%0 models

Sizes and duct types offered

Models in each peer group, with the efficiency index of those models against the rest of the group.
Side by side, inside each size and duct typeShape: every model of the group · bars: each manufacturer’s middle half, median dot, 10th–90th line · 3 groups where both have models
  • InfinityLiving
  • KeplerX
  • All models of the group
Ducted, up to 1.5 tons1.901,783 modelsDucted, 2 tons2.001,090 modelsDucted, 2.5–3 tons2.001,909 modelsDucted, 3.5–4.5 tons2.002,224 modelsNon-ducted, up to 1.5 tons1.953,455 modelsNon-ducted, 2 tons2.00863 modelsNon-ducted, 2.5–3 tons2.001,106 modelsNon-ducted, 3.5–4.5 tons2.00564 modelsmedian

Raw ratings are only placed side by side within one size and duct type, where they are comparable.

Source: AHRI Directory · as of

Models per peer group · efficiency index within the group
Size and duct typeInfinityLivingKeplerX
Ducted, 2 tons3 · index 60%4 · index 50%
Ducted, 2.5–3 tons3 · index 60%6 · index 39%
Ducted, 3.5–4.5 tons5 · index 53%8 · index 43%
Ducted, up to 1.5 tonsNone2 · index 34%
Non-ducted, up to 1.5 tons6 · index 48%None
Non-ducted, 2 tons3 · index 44%None
Non-ducted, 2.5–3 tons2 · index 32%None
Non-ducted, 3.5–4.5 tons1 · index 53%None

Cold-climate and all-around picks, size class by size class

Each manufacturer’s best model on each board in every size and duct type, side by side; the higher score is in bold. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there), so the two compare fairly even when they make different sizes.

Cold-climate picks

Best cold-climate pick per size and duct type (keeps at least 70% of its heat at 5°F). Qualifies when its capacity retention at 5°F (capacity at 5°F as a share of capacity at 47°F) is at least 70% and Capacity retention at 5°F, COP at 5°F, HSPF2 are all rated. Score = the equal-weight mean of its peer percentiles on Capacity retention at 5°F, COP at 5°F, HSPF2 (share of the other models in its peer group it beats, 0–100), all from one certified pairing: in each duct type a model is sold in, its qualifying pairing of that type with the best score; equal scores (one decimal) go to the higher heating capacity at 5°F.
Size and duct typeInfinityLivingCold-climate score, best modelKeplerXCold-climate score, best model
Ducted, up to 1.5 tonsNo models in this size classNone on this board (0 of 2 models qualify)
Ducted, 2 tons66.3(50 is the typical model of its size class)EZ-24-HPBwith ducted air handler EZ-24-AHB3 of 3 models qualify · AHRI 21698083770.4(50 is the typical model of its size class) (higher)K18HVH24WD2R2 of 4 models qualify · AHRI 217894015
Ducted, 2.5–3 tons73.1(50 is the typical model of its size class) (higher)EZ-36-HPBwith ducted air handler EZ-36-AHB3 of 3 models qualify · AHRI 21698083843.5(50 is the typical model of its size class)K18HVH36WD2R1 of 6 models qualify · AHRI 217894016
Ducted, 3.5–4.5 tons70.5(50 is the typical model of its size class) (higher)EZ-48Z-M5B5 of 5 models qualify · AHRI 21698091760.3(50 is the typical model of its size class)K18HVH48WD2R2 of 8 models qualify · AHRI 217894017
Non-ducted, up to 1.5 tons73.1(50 is the typical model of its size class)EZ-18ZPL-HP230Bwith ductless indoor unit EZ-18W-MB3 of 6 models qualify · AHRI 216980876No models in this size class
Non-ducted, 2 tons42.8(50 is the typical model of its size class)EZ-27Z-M3B1 of 3 models qualify · AHRI 216980912No models in this size class
Non-ducted, 2.5–3 tons41.3(50 is the typical model of its size class)EZ-36Z-M4B1 of 2 models qualify · AHRI 216980913No models in this size class
Non-ducted, 3.5–4.5 tons45.0(50 is the typical model of its size class)EZ-48Z-M5B1 of 1 models qualify · AHRI 216980918No models in this size class

All-around best

Best all-around model per size and duct type. Score = 50% heating, the mean of its peer percentiles on COP at 5°F, Capacity retention at 5°F, HSPF2, plus 50% cooling, the mean of its peer percentiles on SEER2 and EER2 (share of the other models in its peer group it beats, 0–100). All five ratings are required; there is no minimum heat kept at 5°F. In each duct type a model is sold in, it is scored on its pairing of that type with the best score; equal scores (one decimal) go to the higher cold-climate score, then the higher heating capacity at 5°F.
Size and duct typeInfinityLivingAll-around score, best modelKeplerXAll-around score, best model
Ducted, up to 1.5 tonsNo models in this size class38.9(50 is the typical model of its size class)K18HVH18WD2UN3with ducted air handler K18HVH18WD2HN32 of 2 models have all five ratings · AHRI 217894009
Ducted, 2 tons68.3(50 is the typical model of its size class)EZ-27Z-M3B3 of 3 models have all five ratings · AHRI 21698091176.9(50 is the typical model of its size class) (higher)K20HVH24WD2VN3with ducted air handler K20HVH24WD2HN34 of 4 models have all five ratings · AHRI 218043800
Ducted, 2.5–3 tons67.3(50 is the typical model of its size class) (higher)EZ-36-HPBwith ducted air handler EZ-36-AHB3 of 3 models have all five ratings · AHRI 21698083854.1(50 is the typical model of its size class)K20HVH36WD2VN3with ducted air handler K20HVH36WD2HN36 of 6 models have all five ratings · AHRI 218043801
Ducted, 3.5–4.5 tons80.2(50 is the typical model of its size class) (higher)EZ-48Z-M5B5 of 5 models have all five ratings · AHRI 21698091765.5(50 is the typical model of its size class)K18HVH48WD2R8 of 8 models have all five ratings · AHRI 217894017
Non-ducted, up to 1.5 tons73.3(50 is the typical model of its size class)EZ-18ZPL-HP230Bwith ductless indoor unit EZ-18W-MB6 of 6 models have all five ratings · AHRI 216980876No models in this size class
Non-ducted, 2 tons56.2(50 is the typical model of its size class)EZ-24ZPL-HP230Bwith ductless indoor unit EZ-24W-MB3 of 3 models have all five ratings · AHRI 216980877No models in this size class
Non-ducted, 2.5–3 tons53.2(50 is the typical model of its size class)EZ-36Z-M4B2 of 2 models have all five ratings · AHRI 216980913No models in this size class
Non-ducted, 3.5–4.5 tons52.8(50 is the typical model of its size class)EZ-48Z-M5B1 of 1 models have all five ratings · AHRI 216980916No models in this size class

All-around board, every manufacturer

Standout model on each rating

Each manufacturer’s model that beats the largest share of comparable models on the rating; the higher share is in bold.
Top model per rating by peer percentile, with its AHRI-certified value and peer group
RatingInfinityLivingKeplerX
COP at 5°Fbeats 98% · 2.44EZ-18ZPL-HP230BNon-ducted, up to 1.5 tonsbeats 90% · 2.35K20HVH48WD2VN3Ducted, 3.5–4.5 tons
Capacity retention at 5°Fbeats 91% · 105%EZ-36-HPBDucted, 2.5–3 tonsbeats 97% · 103%K18HVH24WD2RDucted, 2 tons
HSPF2beats 91% · 10.3EZ-36-HPBDucted, 2.5–3 tonsbeats 69% · 9.0K18HVH48WD2RDucted, 3.5–4.5 tons
SEER2beats 91% · 20.0EZ-48Z-M5BDucted, 3.5–4.5 tonsbeats 86% · 19.3K20HVH36WD2VN3Ducted, 2.5–3 tons
EER2beats 83% · 12.0EZ-48Z-M5BDucted, 3.5–4.5 tonsbeats 81% · 12.5K20HVH24WD2VN3Ducted, 2 tons
Heating capacity at 5°Fbeats 97% · 39,000 Btu/hEZ-36-HPBDucted, 2.5–3 tonsbeats 97% · 25,800 Btu/hK18HVH24WD2RDucted, 2 tons

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