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COMFORMATIC vs GE APPLIANCES ZONELINE heat pumps

Measured against models of the same size and duct type, COMFORMATIC scores higher on 3 of the 6 ratings. COMFORMATIC has 4 outdoor models, GE APPLIANCES ZONELINE has 4 outdoor models. COMFORMATIC and GE APPLIANCES ZONELINE 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.
COMFORMATIC and GE APPLIANCES ZONELINE 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, COMFORMATIC scores higher on 3 of the 6 ratings.
  • COMFORMATIC
  • GE APPLIANCES ZONELINE
  • Other ranked manufacturers
COMFORMA…GE APPLI…

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingCOMFORMATICGE APPLIANCES ZONELINE
Efficiency index44%median ——median —
COP at 5°F37%median 1.90—median —
Capacity retention at 5°F64%median 74%—median —
HSPF242% (higher)median 9.38% (higher)median 7.4
SEER244% (higher)median 20.530% (higher)median 15.7
EER239% (higher)median 11.729% (higher)median 11.6
Heating capacity at 5°F64%median 11,200 Btu/h—median —
Outdoor models44
AHRI certifications84

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardCOMFORMATICGE APPLIANCES ZONELINE
CEE 2025 Tier 1 (Split ASHP)50%2 models0%0 models
CEE 2026 Tier 1 (Split ASHP)50%2 models0%0 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)50%2 models0%0 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate50%2 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
  • COMFORMATIC
  • GE APPLIANCES ZONELINE
  • All models of the group
Ducted, up to 1.5 tons2.00884 modelsDucted, 2 tons2.00821 modelsNon-ducted, up to 1.5 tons1.902,417 modelsNon-ducted, 2 tons1.87611 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 typeCOMFORMATICGE APPLIANCES ZONELINE
Ducted, up to 1.5 tons1 · index 32%4 · index —
Ducted, 2 tons1 · index 46%None
Non-ducted, up to 1.5 tons3 · index 39%None
Non-ducted, 2 tons1 · index 72%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 typeCOMFORMATICCold-climate score, best modelGE APPLIANCES ZONELINECold-climate score, best model
Ducted, up to 1.5 tons36.0(50 is the typical model of its size class)GFMCX18-H21 of 1 models qualify · AHRI 212925600None on this board (0 of 4 models qualify)
Ducted, 2 tons50.1(50 is the typical model of its size class)GFMCX24-H21 of 1 models qualify · AHRI 212925603No models in this size class
Non-ducted, up to 1.5 tons73.4(50 is the typical model of its size class)GFMCX18-H23 of 3 models qualify · AHRI 212925599No models in this size class
Non-ducted, 2 tons76.1(50 is the typical model of its size class)GFMCX24-H21 of 1 models qualify · AHRI 212925602No 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 typeCOMFORMATICAll-around score, best modelGE APPLIANCES ZONELINEAll-around score, best model
Ducted, up to 1.5 tons31.5(50 is the typical model of its size class)GFMCX18-H21 of 1 models have all five ratings · AHRI 212925600None on this board (0 of 4 models have all five ratings)
Ducted, 2 tons45.9(50 is the typical model of its size class)GFMCX24-H21 of 1 models have all five ratings · AHRI 212925603No models in this size class
Non-ducted, up to 1.5 tons58.1(50 is the typical model of its size class)GFMCX18-H23 of 3 models have all five ratings · AHRI 212925599No models in this size class
Non-ducted, 2 tons71.5(50 is the typical model of its size class)GFMCX24-H21 of 1 models have all five ratings · AHRI 212925602No 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
RatingCOMFORMATICGE APPLIANCES ZONELINE
COP at 5°Fbeats 90% · 2.22GFMCX18-H2Non-ducted, up to 1.5 tons—
Capacity retention at 5°Fbeats 75% · 96%GFMCX24-H2Ducted, 2 tons—
HSPF2beats 73% · 10.0GFMCX24-H2Non-ducted, 2 tonsbeats 9% · 7.5AZ9VH12DACH1Also listed as AZ9VH12DBMH2Ducted, up to 1.5 tons
SEER2beats 66% · 21.0GFMCX24-H2Non-ducted, 2 tonsbeats 23% · 15.9AZ9VH12DACH1Also listed as AZ9VH12DBMH2Ducted, up to 1.5 tons
EER2beats 62% · 12.5GFMCX24-H2Non-ducted, 2 tonsbeats 26% · 11.6AZ9VH12DACH1Also listed as AZ9VH12DBMH2Ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 84% · 13,800 Btu/hGFMCX18-H2Non-ducted, up to 1.5 tons—

More comparisons

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