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.

BROCK and KEEN Home 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, KEEN Home scores higher on 5 of the 6 ratings.

BROCK
KEEN Home
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	BROCK	KEEN Home
Efficiency index	35%median —	66%median —
COP at 5°F	41%median 1.80	55%median 2.00
Capacity retention at 5°F	13%median 41%	73%median 93%
HSPF2	24%median 6.7	77%median 10.1
SEER2	24%median 13.4	67%median 20.0
EER2	64%median 11.1	64%median 12.0
Heating capacity at 5°F	17%median 17,000 Btu/h	75%median 22,600 Btu/h
Outdoor models	36	35
AHRI certifications	3,770	66

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	BROCK	KEEN Home
CEE 2025 Tier 1 (Split ASHP)	19.4%7 models	91.4%32 models
CEE 2026 Tier 1 (Split ASHP)	11.1%4 models	91.4%32 models
CEE Advanced Tier (Split ASHP)	0%0 models	5.7%2 models
Xcel Energy Colorado cold-climate ASHP (2025)	0%0 models	94.3%33 models
DOE Cold Climate Heat Pump Challenge	0%0 models	5.7%2 models
ENERGY STAR Cold Climate	0%0 models	88.6%31 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 · 5 groups where both have models

BROCK
KEEN Home
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	BROCK	KEEN Home
Ducted, up to 1.5 tons	2 · index 45%	4 · index 69%
Ducted, 2 tons	4 · index 35%	3 · index 63%
Ducted, 2.5–3 tons	11 · index 35%	6 · index 70%
Ducted, 3.5–4.5 tons	17 · index 31%	6 · index 75%
Ducted, 5 tons and up	2 · index 61%	1 · index 63%
Non-ducted, up to 1.5 tons	None	13 · index 76%
Non-ducted, 2 tons	None	2 · index 62%
Non-ducted, 2.5–3 tons	None	4 · index 59%
Non-ducted, 3.5–4.5 tons	None	5 · index 46%
Non-ducted, 5 tons and up	None	1 · index 27%

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	BROCKCold-climate score, best model	KEEN HomeCold-climate score, best model
Ducted, up to 1.5 tons	None on this board (0 of 2 models qualify)	85.5(50 is the typical model of its size class)KEENHYDHP18AAwith ducted air handler KEENULDAH18AA3 of 4 models qualify · AHRI 217596881
Ducted, 2 tons	None on this board (0 of 4 models qualify)	75.8(50 is the typical model of its size class)KEENHYDHP24AAwith ducted air handler KEENULDAH24AA3 of 3 models qualify · AHRI 217596882
Ducted, 2.5–3 tons	None on this board (0 of 11 models qualify)	82.5(50 is the typical model of its size class)KEENHYZHP36AA6 of 6 models qualify · AHRI 217596929
Ducted, 3.5–4.5 tons	None on this board (0 of 17 models qualify)	82.7(50 is the typical model of its size class)KEENHYZHP49AA6 of 6 models qualify · AHRI 217596932
Ducted, 5 tons and up	None on this board (0 of 2 models qualify)	None on this board (0 of 1 models qualify)
Non-ducted, up to 1.5 tons	No models in this size class	94.4(50 is the typical model of its size class)KEENUMHP06AAwith ductless indoor unit KEENOWAH06AA12 of 13 models qualify · AHRI 217596898
Non-ducted, 2 tons	No models in this size class	87.6(50 is the typical model of its size class)KEENUMHP24AAwith ductless indoor unit KEENFCAH24AA2 of 2 models qualify · AHRI 217596903
Non-ducted, 2.5–3 tons	No models in this size class	89.4(50 is the typical model of its size class)KEENUMHP36AAwith ductless indoor unit KEENFCAH36AA4 of 4 models qualify · AHRI 217596904
Non-ducted, 3.5–4.5 tons	No models in this size class	69.9(50 is the typical model of its size class)KEENHYZHP55AA5 of 5 models qualify · AHRI 217596936
Non-ducted, 5 tons and up	No models in this size class	None on this board (0 of 1 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	BROCKAll-around score, best model	KEEN HomeAll-around score, best model
Ducted, up to 1.5 tons	48.3(50 is the typical model of its size class)PH5SAN519*AAwith indoor coil CAA**1917AM and furnace PG92MSAA42060B2 of 2 models have all five ratings · AHRI 217702474	79.3(50 is the typical model of its size class) (higher)KEENHYDHP18AAwith ducted air handler KEENULDAH18AA4 of 4 models have all five ratings · AHRI 217596881
Ducted, 2 tons	60.6(50 is the typical model of its size class)PH8TAN524*AAwith indoor coil CAA**3721AM and furnace PG80MSUA48060B4 of 4 models have all five ratings · AHRI 215647876	71.7(50 is the typical model of its size class) (higher)KEENHYDHP24AAwith ducted air handler KEENULDAH24AA3 of 3 models have all five ratings · AHRI 217596882
Ducted, 2.5–3 tons	66.7(50 is the typical model of its size class)PH8TAN536*AAwith ducted air handler PF5TNBD60L11 of 11 models have all five ratings · AHRI 215628948	83.6(50 is the typical model of its size class) (higher)KEENHYZHP36AA6 of 6 models have all five ratings · AHRI 217596929
Ducted, 3.5–4.5 tons	72.7(50 is the typical model of its size class)PH8TAN548*AAwith ducted air handler QFVA5D6021X16 of 16 models have all five ratings · AHRI 218695444	85.1(50 is the typical model of its size class) (higher)KEENSTZHP48AA6 of 6 models have all five ratings · AHRI 217596917
Ducted, 5 tons and up	80.2(50 is the typical model of its size class) (higher)PH8TAN560*AAwith ducted air handler PF5TNBD60L3 of 3 models have all five ratings · AHRI 215560743	62.5(50 is the typical model of its size class)KEENSTZHP60AA1 of 1 models have all five ratings · AHRI 217596920
Non-ducted, up to 1.5 tons	No models in this size class	93.4(50 is the typical model of its size class)KEENHYMHP06AAwith ductless indoor unit KEENHYMAH612AAlso listed as KEENHYMHP09AA, KEENHYMHP12AA12 of 13 models have all five ratings · AHRI 217596895
Non-ducted, 2 tons	No models in this size class	67.1(50 is the typical model of its size class)KEENUMHP24AAwith ductless indoor unit KEENFCAH24AA2 of 2 models have all five ratings · AHRI 217596903
Non-ducted, 2.5–3 tons	No models in this size class	66.3(50 is the typical model of its size class)KEENHYZHP36AA4 of 4 models have all five ratings · AHRI 217596928
Non-ducted, 3.5–4.5 tons	No models in this size class	62.6(50 is the typical model of its size class)KEENHYZHP55AA5 of 5 models have all five ratings · AHRI 217596934
Non-ducted, 5 tons and up	No models in this size class	32.5(50 is the typical model of its size class)KEENSTZHP60AA1 of 1 models have all five ratings · AHRI 217596919

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	BROCK	KEEN Home
COP at 5°F	beats 92% · 2.48PH8TAN536*AADucted, 2.5–3 tons	beats 97% · 2.40KEENUMHP06AANon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 41% · 52%PH5SAN560*AAAlso listed as PH5SAP560**AADucted, 5 tons and up	beats 100% · 150%KEENHYMHP06AAAlso listed as KEENHYMHP09AA, KEENHYMHP12AANon-ducted, up to 1.5 tons
HSPF2	beats 58% · 8.5PH8TAN548*AADucted, 3.5–4.5 tons	beats 100% · 15.6KEENHYMHP06AAAlso listed as KEENHYMHP09AA, KEENHYMHP12AANon-ducted, up to 1.5 tons
SEER2	beats 81% · 17.5PH8TAN560*AADucted, 5 tons and up	beats 100% · 35.0KEENHYMHP06AAAlso listed as KEENHYMHP09AA, KEENHYMHP12AANon-ducted, up to 1.5 tons
EER2	beats 99% · 13.5PH8TAN548*AADucted, 3.5–4.5 tons	beats 99% · 17.4KEENHYMHP06AAAlso listed as KEENHYMHP09AA, KEENHYMHP12AANon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 44% · 8,600 Btu/hPH5SAN518*AADucted, up to 1.5 tons	beats 99% · 22,600 Btu/hKEENHYMHP18AANon-ducted, up to 1.5 tons

More comparisons

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BROCK vs KEEN Home heat pumps