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Antarctic Star vs Endura heat pumps

Measured against models of the same size and duct type, Endura scores higher on 5 of the 6 ratings. Antarctic Star has 9 outdoor models, Endura has 9 outdoor models. Antarctic Star and Endura 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.
Antarctic Star and Endura 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, Endura scores higher on 5 of the 6 ratings.
  • Antarctic Star
  • Endura
  • Other ranked manufacturers
Antarcti…Endura

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingAntarctic StarEndura
Efficiency index34%median —63%median —
COP at 5°F62% (higher)median 2.0547% (higher)median 1.99
Capacity retention at 5°F26%median 67%73%median 77%
HSPF225%median 9.057%median 9.0
SEER238%median 20.569%median 19.0
EER222%median 10.566%median 12.0
Heating capacity at 5°F34%median 8,200 Btu/h69%median 36,000 Btu/h
Outdoor models99
AHRI certifications925

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardAntarctic StarEndura
CEE 2025 Tier 1 (Split ASHP)77.8%7 models100%9 models
CEE 2026 Tier 1 (Split ASHP)77.8%7 models100%9 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)44.4%4 models100%9 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate0%0 models100%9 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
  • Antarctic Star
  • Endura
  • 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 modelsDucted, 5 tons and up2.00321 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 typeAntarctic StarEndura
Ducted, up to 1.5 tonsNone1 · index 65%
Ducted, 2 tonsNone1 · index 44%
Ducted, 2.5–3 tonsNone4 · index 63%
Ducted, 3.5–4.5 tonsNone2 · index 71%
Ducted, 5 tons and upNone1 · index 81%
Non-ducted, up to 1.5 tons7 · index 37%1 · index 69%
Non-ducted, 2 tons2 · index 24%None
Non-ducted, 2.5–3 tonsNone2 · index 63%
Non-ducted, 3.5–4.5 tonsNone1 · index 44%

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 typeAntarctic StarCold-climate score, best modelEnduraCold-climate score, best model
Ducted, up to 1.5 tonsNo models in this size class66.2(50 is the typical model of its size class)HBEFLM2-OD181 of 1 models qualify · AHRI 218457862
Ducted, 2 tonsNo models in this size class82.1(50 is the typical model of its size class)HBEFU-24R454Bwith ducted air handler HBEC-FC24R454B1 of 1 models qualify · AHRI 218457845
Ducted, 2.5–3 tonsNo models in this size class87.9(50 is the typical model of its size class)HBEFU-36R454Bwith ducted air handler HBEC-FC36R454B4 of 4 models qualify · AHRI 218457846
Ducted, 3.5–4.5 tonsNo models in this size class77.3(50 is the typical model of its size class)HBEFU-48R454Bwith ducted air handler HBEC-FC48R454B2 of 2 models qualify · AHRI 218457847
Ducted, 5 tons and upNo models in this size class88.7(50 is the typical model of its size class)HBEFU-60R454Bwith ducted air handler HBEC-FC60R454B1 of 1 models qualify · AHRI 218457848
Non-ducted, up to 1.5 tons47.3(50 is the typical model of its size class)SE7203P-9Kwith ductless indoor unit SE7203S-9KAlso listed as SE7203PW-9K-ZAZ4 of 7 models qualify · AHRI 21878787069.5(50 is the typical model of its size class) (higher)HBEFLM2-OD181 of 1 models qualify · AHRI 218457861
Non-ducted, 2 tonsNone on this board (0 of 2 models qualify)No models in this size class
Non-ducted, 2.5–3 tonsNo models in this size class53.7(50 is the typical model of its size class)HBEFLM4-OD362 of 2 models qualify · AHRI 218457871
Non-ducted, 3.5–4.5 tonsNo models in this size class16.4(50 is the typical model of its size class)HBEFLM5-OD421 of 1 models qualify · AHRI 218457868

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 typeAntarctic StarAll-around score, best modelEnduraAll-around score, best model
Ducted, up to 1.5 tonsNo models in this size class64.6(50 is the typical model of its size class)HBEFLM2-OD181 of 1 models have all five ratings · AHRI 218457862
Ducted, 2 tonsNo models in this size class79.5(50 is the typical model of its size class)HBEFU-24R454Bwith ducted air handler HBEC-FC24R454B1 of 1 models have all five ratings · AHRI 218457845
Ducted, 2.5–3 tonsNo models in this size class82.3(50 is the typical model of its size class)HBEFU-36R454Bwith ducted air handler HBEC-FC36R454B4 of 4 models have all five ratings · AHRI 218457846
Ducted, 3.5–4.5 tonsNo models in this size class82.3(50 is the typical model of its size class)HBEFU-48R454Bwith ducted air handler HBEC-FC48R454B2 of 2 models have all five ratings · AHRI 218457847
Ducted, 5 tons and upNo models in this size class81.1(50 is the typical model of its size class)HBEFU-60R454Bwith ducted air handler HBEC-FC60R454B1 of 1 models have all five ratings · AHRI 218457848
Non-ducted, up to 1.5 tons39.5(50 is the typical model of its size class)SE7203P-9Kwith ductless indoor unit SE7203S-9KAlso listed as SE7203PW-9K-ZAZ7 of 7 models have all five ratings · AHRI 21878787069.2(50 is the typical model of its size class) (higher)HBEFLM2-OD181 of 1 models have all five ratings · AHRI 218457861
Non-ducted, 2 tons23.5(50 is the typical model of its size class)SE7203P-24Kwith ductless indoor unit SE7203S-24KAlso listed as SE7203PW-24K-ZAZ2 of 2 models have all five ratings · AHRI 218787873No models in this size class
Non-ducted, 2.5–3 tonsNo models in this size class64.2(50 is the typical model of its size class)HBEFLM3-OD272 of 2 models have all five ratings · AHRI 218457864
Non-ducted, 3.5–4.5 tonsNo models in this size class43.7(50 is the typical model of its size class)HBEFLM5-OD421 of 1 models have all five ratings · AHRI 218457868

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
RatingAntarctic StarEndura
COP at 5°Fbeats 74% · 2.09SE7203S-18KAlso listed as SE7203SW-18K-ZAZNon-ducted, up to 1.5 tonsbeats 98% · 2.42HBEFU-60R454BDucted, 5 tons and up
Capacity retention at 5°Fbeats 61% · 80%SE7203P-9KAlso listed as SE7203PW-9K-ZAZNon-ducted, up to 1.5 tonsbeats 94% · 75%HBEFU-60R454BDucted, 5 tons and up
HSPF2beats 29% · 9.0SE7203P-9KAlso listed as SE7203PW-9K-ZAZNon-ducted, up to 1.5 tonsbeats 96% · 10.5HBEFU-36R454BDucted, 2.5–3 tons
SEER2beats 56% · 22.0A7201P-12K-ELAlso listed as A7201PW-12K-EL, A7201PW-12K-ZAZNon-ducted, up to 1.5 tonsbeats 95% · 19.0HBEFU-60R454BDucted, 5 tons and up
EER2beats 28% · 11.0SE7203S-18KAlso listed as SE7203SW-18K-ZAZNon-ducted, up to 1.5 tonsbeats 94% · 12.9HBEFLM4-OD36Ducted, 2.5–3 tons
Heating capacity at 5°Fbeats 73% · 12,600 Btu/hSE7203S-18KAlso listed as SE7203SW-18K-ZAZNon-ducted, up to 1.5 tonsbeats 93% · 18,000 Btu/hHBEFLM2-OD18Non-ducted, up to 1.5 tons

More comparisons

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