First Co. vs InfinityLiving heat pumps

Measured against models of the same size and duct type, InfinityLiving scores higher on 6 of the 6 ratings. First Co. has 21 outdoor models, InfinityLiving has 20 outdoor models. First Co. and InfinityLiving have no QMID on file and are not ranked.

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CompareData as of Oct 11, 2026updated Oct 11, 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.

First Co. and InfinityLiving 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, InfinityLiving scores higher on 6 of the 6 ratings.

First Co.
InfinityLiving
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 11, 2026

Average peer percentile, raw median and rank among ranked manufacturers
Rating	First Co.	InfinityLiving
Efficiency index	11%median —	51%median —
COP at 5°F	34%median 1.90	52%median 2.00
Capacity retention at 5°F	12%median 49%	44%median 71%
HSPF2	1%median 6.3	58%median 9.5
SEER2	0%median 11.9	57%median 19.2
EER2	12%median 10.0	42%median 11.2
Heating capacity at 5°F	14%median 8,000 Btu/h	55%median 21,600 Btu/h
Outdoor models	21	20
AHRI certifications	61	26

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	First Co.	InfinityLiving
CEE 2025 Tier 1 (Split ASHP)	0%0 models	75%15 models
CEE 2026 Tier 1 (Split ASHP)	0%0 models	75%15 models
CEE Advanced Tier (Split ASHP)	0%0 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	0%0 models	65%13 models
DOE Cold Climate Heat Pump Challenge	0%0 models	0%0 models
ENERGY STAR Cold Climate	0%0 models	70%14 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 · 2 groups where both have models

First Co.
InfinityLiving
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 11, 2026

Models per peer group · efficiency index within the group
Size and duct type	First Co.	InfinityLiving
Ducted, up to 1.5 tons	11 · index 9%	None
Ducted, 2 tons	7 · index 13%	3 · index 60%
Ducted, 2.5–3 tons	3 · index 15%	3 · index 60%
Ducted, 3.5–4.5 tons	None	5 · index 53%
Non-ducted, up to 1.5 tons	None	6 · index 48%
Non-ducted, 2 tons	None	3 · index 44%
Non-ducted, 2.5–3 tons	None	2 · index 32%
Non-ducted, 3.5–4.5 tons	None	1 · index 53%

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	First Co.Cold-climate score, best model	InfinityLivingCold-climate score, best model
Ducted, up to 1.5 tons	None on this board (0 of 11 models qualify)	No models in this size class
Ducted, 2 tons	None on this board (0 of 7 models qualify)	66.3(50 is the typical model of its size class)EZ-24-HPBwith ducted air handler EZ-24-AHB3 of 3 models qualify · AHRI 216980837
Ducted, 2.5–3 tons	None on this board (0 of 3 models qualify)	73.1(50 is the typical model of its size class)EZ-36-HPBwith ducted air handler EZ-36-AHB3 of 3 models qualify · AHRI 216980838
Ducted, 3.5–4.5 tons	No models in this size class	70.5(50 is the typical model of its size class)EZ-48Z-M5B5 of 5 models qualify · AHRI 216980917
Non-ducted, up to 1.5 tons	No models in this size class	73.1(50 is the typical model of its size class)EZ-18ZPL-HP230Bwith ductless indoor unit EZ-18W-MB3 of 6 models qualify · AHRI 216980876
Non-ducted, 2 tons	No models in this size class	42.8(50 is the typical model of its size class)EZ-27Z-M3B1 of 3 models qualify · AHRI 216980912
Non-ducted, 2.5–3 tons	No models in this size class	41.3(50 is the typical model of its size class)EZ-36Z-M4B1 of 2 models qualify · AHRI 216980913
Non-ducted, 3.5–4.5 tons	No models in this size class	45.0(50 is the typical model of its size class)EZ-48Z-M5B1 of 1 models qualify · AHRI 216980918

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	First Co.All-around score, best model	InfinityLivingAll-around score, best model
Ducted, up to 1.5 tons	25.1(50 is the typical model of its size class)18WHHPBAwith ducted air handler 37CLX(*,Q,W)11 of 11 models have all five ratings · AHRI 216831931	No models in this size class
Ducted, 2 tons	30.4(50 is the typical model of its size class)24WHHPBAwith ducted air handler 37CLX(*,Q,W)7 of 7 models have all five ratings · AHRI 216831932	68.3(50 is the typical model of its size class) (higher)EZ-27Z-M3B3 of 3 models have all five ratings · AHRI 216980911
Ducted, 2.5–3 tons	20.0(50 is the typical model of its size class)30WHHPBAwith ducted air handler 37CLX(*,Q,W)3 of 3 models have all five ratings · AHRI 216831933	67.3(50 is the typical model of its size class) (higher)EZ-36-HPBwith ducted air handler EZ-36-AHB3 of 3 models have all five ratings · AHRI 216980838
Ducted, 3.5–4.5 tons	No models in this size class	80.2(50 is the typical model of its size class)EZ-48Z-M5B5 of 5 models have all five ratings · AHRI 216980917
Non-ducted, up to 1.5 tons	No models in this size class	73.3(50 is the typical model of its size class)EZ-18ZPL-HP230Bwith ductless indoor unit EZ-18W-MB6 of 6 models have all five ratings · AHRI 216980876
Non-ducted, 2 tons	No models in this size class	56.2(50 is the typical model of its size class)EZ-24ZPL-HP230Bwith ductless indoor unit EZ-24W-MB3 of 3 models have all five ratings · AHRI 216980877
Non-ducted, 2.5–3 tons	No models in this size class	53.2(50 is the typical model of its size class)EZ-36Z-M4B2 of 2 models have all five ratings · AHRI 216980913
Non-ducted, 3.5–4.5 tons	No models in this size class	52.8(50 is the typical model of its size class)EZ-48Z-M5B1 of 1 models have all five ratings · AHRI 216980916

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	First Co.	InfinityLiving
COP at 5°F	beats 63% · 2.00EHE12*DAAlso listed as EHE12E*ADucted, up to 1.5 tons	beats 98% · 2.44EZ-18ZPL-HP230BNon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 24% · 54%EPE30*DAlso listed as EPE30*EDucted, 2.5–3 tons	beats 91% · 105%EZ-36-HPBDucted, 2.5–3 tons
HSPF2	beats 16% · 6.830WHHPBADucted, 2.5–3 tons	beats 91% · 10.3EZ-36-HPBDucted, 2.5–3 tons
SEER2	beats 20% · 14.218WHHPBADucted, up to 1.5 tons	beats 91% · 20.0EZ-48Z-M5BDucted, 3.5–4.5 tons
EER2	beats 76% · 12.518WHHPBADucted, up to 1.5 tons	beats 83% · 12.0EZ-48Z-M5BDucted, 3.5–4.5 tons
Heating capacity at 5°F	beats 38% · 8,000 Btu/hEHE18*DAAlso listed as EHE18E*ADucted, up to 1.5 tons	beats 97% · 39,000 Btu/hEZ-36-HPBDucted, 2.5–3 tons

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