BROCK vs ZOKOP heat pumps

Measured against models of the same size and duct type, BROCK scores higher on 3 of the 6 ratings. BROCK has 24 outdoor models, ZOKOP has 17 outdoor models. BROCK and ZOKOP 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.

BROCK and ZOKOP 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, BROCK scores higher on 3 of the 6 ratings.

BROCK
ZOKOP
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	BROCK	ZOKOP
Efficiency index	42% (higher)median —	34% (higher)median —
COP at 5°F	62% (higher)median 2.17	22% (higher)median 1.80
Capacity retention at 5°F	14%median 46%	35%median 68%
HSPF2	26% (higher)median 7.5	18% (higher)median 8.5
SEER2	32%median 14.9	32%median 19.0
EER2	68% (higher)median 11.9	24% (higher)median 10.0
Heating capacity at 5°F	16%median 17,150 Btu/h	44%median 10,350 Btu/h
Outdoor models	24	17
AHRI certifications	2,986	17

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	BROCK	ZOKOP
CEE 2025 Tier 1 (Split ASHP)	16.7%4 models	41.2%7 models
CEE 2026 Tier 1 (Split ASHP)	12.5%3 models	41.2%7 models
CEE Advanced Tier (Split ASHP)	0%0 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	0%0 models	29.4%5 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

BROCK
ZOKOP
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	ZOKOP
Ducted, up to 1.5 tons	1 · index 39%	None
Ducted, 2 tons	3 · index 38%	None
Ducted, 2.5–3 tons	7 · index 40%	None
Ducted, 3.5–4.5 tons	10 · index 42%	None
Ducted, 5 tons and up	3 · index 65%	None
Non-ducted, up to 1.5 tons	None	15 · index 35%
Non-ducted, 2 tons	None	1 · index —
Non-ducted, 2.5–3 tons	None	1 · index 28%

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	ZOKOPCold-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 3 models qualify)	No models in this size class
Ducted, 2.5–3 tons	None on this board (0 of 7 models qualify)	No models in this size class
Ducted, 3.5–4.5 tons	None on this board (0 of 10 models qualify)	No models in this size class
Ducted, 5 tons and up	None on this board (0 of 3 models qualify)	No models in this size class
Non-ducted, up to 1.5 tons	No models in this size class	47.5(50 is the typical model of its size class)TSC-12HA2/I3XI23-Owith ductless indoor unit TSC-12HA2/I3XI23-I5 of 15 models qualify · AHRI 213927374
Non-ducted, 2 tons	No models in this size class	None on this board (0 of 1 models qualify)
Non-ducted, 2.5–3 tons	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	ZOKOPAll-around score, best model
Ducted, up to 1.5 tons	41.0(50 is the typical model of its size class)PH5SAN418*AAwith indoor coil CAP**2517AL and furnace PG80ESUA36040B1 of 1 models have all five ratings · AHRI 211276012	No models in this size class
Ducted, 2 tons	62.2(50 is the typical model of its size class)PH7TAN424*AAwith indoor coil CAP**3721AL and furnace PG80VTLB60090C3 of 3 models have all five ratings · AHRI 213169195	No models in this size class
Ducted, 2.5–3 tons	66.4(50 is the typical model of its size class)PH7TAN436*AAwith ducted air handler PF4TNBD60L5 of 7 models have all five ratings · AHRI 213925458	No models in this size class
Ducted, 3.5–4.5 tons	72.2(50 is the typical model of its size class)PH7TAN448*AAwith ducted air handler PF4TNBD60L8 of 10 models have all five ratings · AHRI 213280649	No models in this size class
Ducted, 5 tons and up	64.7(50 is the typical model of its size class)PH5SAN460*AAwith ducted air handler PF4TNBD60L1 of 3 models have all five ratings · AHRI 213280500	No models in this size class
Non-ducted, up to 1.5 tons	No models in this size class	60.2(50 is the typical model of its size class)TSC-12HA2/I3XI23-Owith ductless indoor unit TSC-12HA2/I3XI23-I9 of 15 models have all five ratings · AHRI 213927374
Non-ducted, 2 tons	No models in this size class	None on this board (0 of 1 models have all five ratings)
Non-ducted, 2.5–3 tons	No models in this size class	28.1(50 is the typical model of its size class)TMSC-27HA2/I2XI19-O1 of 1 models have all five ratings · AHRI 213927380

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	ZOKOP
COP at 5°F	beats 90% · 2.34PH7TAN436*AADucted, 2.5–3 tons	beats 22% · 1.80TSC-18HA2/I2XI19-ONon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 35% · 60%PH5SAN436*AADucted, 2.5–3 tons	beats 60% · 76%TSC-12HA2/I3XI23-ONon-ducted, up to 1.5 tons
HSPF2	beats 52% · 8.1PH5SAN460*AADucted, 5 tons and up	beats 57% · 9.5TSC-12HA2/I3XI23-ONon-ducted, up to 1.5 tons
SEER2	beats 82% · 17.5PH7TAN448*AADucted, 3.5–4.5 tons	beats 73% · 23.0TSC-09HA1/I3XI22-ONon-ducted, up to 1.5 tons
EER2	beats 98% · 13.0PH7TAN448*AADucted, 3.5–4.5 tons	beats 68% · 13.0TSC-12HA2/I3XI23-ONon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 39% · 30,200 Btu/hPH7TAN460*AADucted, 3.5–4.5 tons	beats 78% · 13,000 Btu/hTMSC-18HA2/I2XI20-ONon-ducted, up to 1.5 tons

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