APLUS vs ARCTIC KING heat pumps

Measured against models of the same size and duct type, ARCTIC KING scores higher on 2 of the 6 ratings. APLUS has 5 outdoor models, ARCTIC KING has 5 outdoor models. APLUS and ARCTIC KING have no QMID on file and are not ranked.

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CompareData as of Oct 9, 2026updated Oct 10, 2026 · 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.

APLUS and ARCTIC KING 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, ARCTIC KING scores higher on 2 of the 6 ratings.

APLUS
ARCTIC KING
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 9, 2026

Average peer percentile, raw median and rank among ranked manufacturers
Rating	APLUS	ARCTIC KING
Efficiency index	—median —	35%median —
COP at 5°F	—median —	40%median 1.85
Capacity retention at 5°F	—median —	28%median 64%
HSPF2	21%median 7.5	29%median 9.0
SEER2	13%median 14.3	23%median 17.0
EER2	51% (higher)median 11.5	27% (higher)median 9.0
Heating capacity at 5°F	—median —	29%median 15,900 Btu/h
Outdoor models	5	5
AHRI certifications	9	5

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	APLUS	ARCTIC KING
CEE 2025 Tier 1 (Split ASHP)	0%0 models	20%1 models
CEE 2026 Tier 1 (Split ASHP)	0%0 models	20%1 models
CEE Advanced Tier (Split ASHP)	0%0 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	0%0 models	0%0 models
DOE Cold Climate Heat Pump Challenge	0%0 models	0%0 models
ENERGY STAR Cold Climate	0%0 models	0%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 · 0 groups where both have models

APLUS
ARCTIC KING
All models of the group

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

Source: AHRI Directory · as of Oct 9, 2026

Models per peer group · efficiency index within the group
Size and duct type	APLUS	ARCTIC KING
Ducted, up to 1.5 tons	1 · index —	None
Ducted, 2 tons	2 · index —	None
Ducted, 2.5–3 tons	2 · index —	None
Non-ducted, 2 tons	None	2 · index 35%
Non-ducted, 2.5–3 tons	None	1 · index —
Non-ducted, 3.5–4.5 tons	None	2 · index —

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 type	APLUSCold-climate score, best model	ARCTIC KINGCold-climate score, best model
Ducted, up to 1.5 tons	None on this board (0 of 1 models qualify)	No models in this size class
Ducted, 2 tons	None on this board (0 of 2 models qualify)	No models in this size class
Ducted, 2.5–3 tons	None on this board (0 of 2 models qualify)	No models in this size class
Non-ducted, 2 tons	No models in this size class	None on this board (0 of 2 models qualify)
Non-ducted, 2.5–3 tons	No models in this size class	None on this board (0 of 1 models qualify)
Non-ducted, 3.5–4.5 tons	No models in this size class	None on this board (0 of 2 models qualify)

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 type	APLUSAll-around score, best model	ARCTIC KINGAll-around score, best model
Ducted, up to 1.5 tons	None on this board (0 of 1 models have all five ratings)	No models in this size class
Ducted, 2 tons	None on this board (0 of 2 models have all five ratings)	No models in this size class
Ducted, 2.5–3 tons	None on this board (0 of 2 models have all five ratings)	No models in this size class
Non-ducted, 2 tons	No models in this size class	56.4(50 is the typical model of its size class)MOD33-24HFN1-MT0Wwith ductless indoor unit MSAG11D-23HRFN1-MU0W2 of 2 models have all five ratings · AHRI 207821945
Non-ducted, 2.5–3 tons	No models in this size class	None on this board (0 of 1 models have all five ratings)
Non-ducted, 3.5–4.5 tons	No models in this size class	None on this board (0 of 2 models have all five ratings)

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
Rating	APLUS	ARCTIC KING
COP at 5°F	—	beats 55% · 1.90MOD33-24HFN1-MT0WNon-ducted, 2 tons
Capacity retention at 5°F	—	beats 29% · 64%MOD33-24HFN1-MT0WNon-ducted, 2 tons
HSPF2	beats 21% · 7.5ATD-HF30SMR1-A01/SE143Ducted, 2.5–3 tons	beats 57% · 9.3MOD30U-36HFN1-MNon-ducted, 2.5–3 tons
SEER2	beats 13% · 14.3ATD-HF30SMR1-A01/SE143Ducted, 2.5–3 tons	beats 66% · 21.0MOD33-24HFN1-MT0WNon-ducted, 2 tons
EER2	beats 57% · 11.5ATD-HF30SMR1-A01/SE143Ducted, 2.5–3 tons	beats 84% · 13.0MOD33-24HFN1-MT0WNon-ducted, 2 tons
Heating capacity at 5°F	—	beats 35% · 16,700 Btu/hMOD33-24HFN1-MT0WNon-ducted, 2 tons

More comparisons

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