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iFFALCON vs KeplerX heat pumps

Measured against models of the same size and duct type, iFFALCON scores higher on 3 of the 6 ratings. iFFALCON has 20 outdoor models, KeplerX has 20 outdoor models. iFFALCON 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.
iFFALCON 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, iFFALCON scores higher on 3 of the 6 ratings.
  • iFFALCON
  • KeplerX
  • Other ranked manufacturers
iFFALCONKeplerX

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingiFFALCONKeplerX
Efficiency index49% (higher)median —42% (higher)median —
COP at 5°F28%median 1.8034%median 1.80
Capacity retention at 5°F51% (higher)median 76%41% (higher)median 60%
HSPF254% (higher)median 10.052% (higher)median 8.5
SEER258%median 22.558%median 17.4
EER237% (higher)median 11.526% (higher)median 10.5
Heating capacity at 5°F46%median 13,000 Btu/h46%median 23,200 Btu/h
Outdoor models2020
AHRI certifications2220

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardiFFALCONKeplerX
CEE 2025 Tier 1 (Split ASHP)70%14 models35%7 models
CEE 2026 Tier 1 (Split ASHP)70%14 models35%7 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)75%15 models25%5 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate75%15 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 · 1 groups where both have models
  • iFFALCON
  • 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 typeiFFALCONKeplerX
Ducted, 3.5–4.5 tons1 · index 61%8 · index 43%
Ducted, up to 1.5 tonsNone2 · index 34%
Ducted, 2 tonsNone4 · index 50%
Ducted, 2.5–3 tonsNone6 · index 39%
Non-ducted, up to 1.5 tons13 · index 48%None
Non-ducted, 2 tons2 · index 46%None
Non-ducted, 2.5–3 tons3 · index 42%None
Non-ducted, 3.5–4.5 tons2 · index 60%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 typeiFFALCONCold-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 tonsNo models in this size class70.4(50 is the typical model of its size class)K18HVH24WD2R2 of 4 models qualify · AHRI 217894015
Ducted, 2.5–3 tonsNo models in this size class43.5(50 is the typical model of its size class)K18HVH36WD2R1 of 6 models qualify · AHRI 217894016
Ducted, 3.5–4.5 tons53.7(50 is the typical model of its size class)F48FMHD6XPC1 of 1 models qualify · AHRI 21874376160.3(50 is the typical model of its size class) (higher)K18HVH48WD2R2 of 8 models qualify · AHRI 217894017
Non-ducted, up to 1.5 tons61.9(50 is the typical model of its size class)F18FMH24XQC10 of 13 models qualify · AHRI 218451117No models in this size class
Non-ducted, 2 tons61.6(50 is the typical model of its size class)F24SBH23XQCwith ductless indoor unit F24SBH23XQE1 of 2 models qualify · AHRI 218451112No models in this size class
Non-ducted, 2.5–3 tons55.0(50 is the typical model of its size class)F27FMH24XQC2 of 3 models qualify · AHRI 218451118No models in this size class
Non-ducted, 3.5–4.5 tons48.1(50 is the typical model of its size class)F48FMHD6XPC2 of 2 models qualify · AHRI 218743760No 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 typeiFFALCONAll-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 tonsNo models in this size class76.9(50 is the typical model of its size class)K20HVH24WD2VN3with ducted air handler K20HVH24WD2HN34 of 4 models have all five ratings · AHRI 218043800
Ducted, 2.5–3 tonsNo models in this size class54.1(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 tons60.9(50 is the typical model of its size class)F48FMHD6XPC1 of 1 models have all five ratings · AHRI 21874376165.5(50 is the typical model of its size class) (higher)K18HVH48WD2R8 of 8 models have all five ratings · AHRI 217894017
Non-ducted, up to 1.5 tons63.4(50 is the typical model of its size class)F12SBH23BQCwith ductless indoor unit F12SBH23BQEAlso listed as F12SBH24XQC11 of 13 models have all five ratings · AHRI 218451108No models in this size class
Non-ducted, 2 tons64.8(50 is the typical model of its size class)F24SBH23XQCwith ductless indoor unit F24SBH23XQE2 of 2 models have all five ratings · AHRI 218451112No models in this size class
Non-ducted, 2.5–3 tons54.8(50 is the typical model of its size class)F36FMH22XQC3 of 3 models have all five ratings · AHRI 218451119No models in this size class
Non-ducted, 3.5–4.5 tons70.2(50 is the typical model of its size class)F48FMHD6XPC2 of 2 models have all five ratings · AHRI 218743760No 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
RatingiFFALCONKeplerX
COP at 5°Fbeats 71% · 2.10F24SBH23XQCNon-ducted, 2 tonsbeats 90% · 2.35K20HVH48WD2VN3Ducted, 3.5–4.5 tons
Capacity retention at 5°Fbeats 71% · 85%F48FMHD6XPCDucted, 3.5–4.5 tonsbeats 97% · 103%K18HVH24WD2RDucted, 2 tons
HSPF2beats 69% · 9.0F48FMHD6XPCDucted, 3.5–4.5 tonsbeats 69% · 9.0K18HVH48WD2RDucted, 3.5–4.5 tons
SEER2beats 94% · 24.0F42FMH22XQCNon-ducted, 3.5–4.5 tonsbeats 86% · 19.3K20HVH36WD2VN3Ducted, 2.5–3 tons
EER2beats 81% · 12.3F48FMHD6XPCNon-ducted, 3.5–4.5 tonsbeats 81% · 12.5K20HVH24WD2VN3Ducted, 2 tons
Heating capacity at 5°Fbeats 86% · 15,000 Btu/hF18SBH23XQCNon-ducted, up to 1.5 tonsbeats 97% · 25,800 Btu/hK18HVH24WD2RDucted, 2 tons

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