IAIR vs MANUFLOW heat pumps

Measured against models of the same size and duct type, MANUFLOW scores higher on 5 of the 6 ratings. IAIR has 35 outdoor models, MANUFLOW has 34 outdoor models. IAIR and MANUFLOW 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.

IAIR and MANUFLOW 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, MANUFLOW scores higher on 5 of the 6 ratings.

IAIR
MANUFLOW
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	IAIR	MANUFLOW
Efficiency index	18%median —	56%median —
COP at 5°F	2%median 1.40	34%median 1.80
Capacity retention at 5°F	4%median 36%	48%median 70%
HSPF2	19%median 7.5	28%median 8.6
SEER2	15%median 14.3	39%median 19.8
EER2	60% (higher)median 11.5	50% (higher)median 11.7
Heating capacity at 5°F	4%median 13,300 Btu/h	45%median 8,400 Btu/h
Outdoor models	35	34
AHRI certifications	103	34

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	IAIR	MANUFLOW
CEE 2025 Tier 1 (Split ASHP)	0%0 models	35.3%12 models
CEE 2026 Tier 1 (Split ASHP)	0%0 models	35.3%12 models
CEE Advanced Tier (Split ASHP)	0%0 models	0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)	0%0 models	29.4%10 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

IAIR
MANUFLOW
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	IAIR	MANUFLOW
Ducted, up to 1.5 tons	3 · index —	None
Ducted, 2 tons	5 · index 12%	None
Ducted, 2.5–3 tons	10 · index 16%	None
Ducted, 3.5–4.5 tons	15 · index 21%	None
Ducted, 5 tons and up	2 · index 19%	None
Non-ducted, up to 1.5 tons	None	26 · index 55%
Non-ducted, 2 tons	None	6 · index 59%
Non-ducted, 2.5–3 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	IAIRCold-climate score, best model	MANUFLOWCold-climate score, best model
Ducted, up to 1.5 tons	None on this board (0 of 3 models qualify)	No models in this size class
Ducted, 2 tons	None on this board (0 of 5 models qualify)	No models in this size class
Ducted, 2.5–3 tons	None on this board (0 of 10 models qualify)	No models in this size class
Ducted, 3.5–4.5 tons	None on this board (0 of 15 models qualify)	No models in this size class
Ducted, 5 tons and up	None on this board (0 of 2 models qualify)	No models in this size class
Non-ducted, up to 1.5 tons	No models in this size class	75.7(50 is the typical model of its size class)AS-09UW3SXEDJ(O)with ductless indoor unit AS-09UW3SXEDJ(I)9 of 26 models qualify · AHRI 202021915
Non-ducted, 2 tons	No models in this size class	64.0(50 is the typical model of its size class)AST-24UW3SDBDJ01(O)with ductless indoor unit AST-24UW3SDBDJ01(I)1 of 6 models qualify · AHRI 203446798
Non-ducted, 2.5–3 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	IAIRAll-around score, best model	MANUFLOWAll-around score, best model
Ducted, up to 1.5 tons	None on this board (0 of 3 models have all five ratings)	No models in this size class
Ducted, 2 tons	12.4(50 is the typical model of its size class)APH3024E100AAlso listed as IPH3024E100A2 of 5 models have all five ratings · AHRI 211289991	No models in this size class
Ducted, 2.5–3 tons	17.3(50 is the typical model of its size class)APH3036E100AAlso listed as IPH3036E100A4 of 10 models have all five ratings · AHRI 212255584	No models in this size class
Ducted, 3.5–4.5 tons	21.5(50 is the typical model of its size class)APH3048E100AAlso listed as IPH3048E100A4 of 15 models have all five ratings · AHRI 212255588	No models in this size class
Ducted, 5 tons and up	19.3(50 is the typical model of its size class)APH3060E100AAlso listed as IPH3060E100A2 of 2 models have all five ratings · AHRI 212255589	No models in this size class
Non-ducted, up to 1.5 tons	No models in this size class	85.4(50 is the typical model of its size class)AS-09UW3SXEDJ(O)with ductless indoor unit AS-09UW3SXEDJ(I)12 of 26 models have all five ratings · AHRI 202021915
Non-ducted, 2 tons	No models in this size class	58.5(50 is the typical model of its size class)AST-24UW3SDBDJ01(O)with ductless indoor unit AST-24UW3SDBDJ01(I)1 of 6 models have all five ratings · AHRI 203446798
Non-ducted, 2.5–3 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	IAIR	MANUFLOW
COP at 5°F	beats 4% · 1.40APH3060E100AAlso listed as IPH3060E100ADucted, 5 tons and up	beats 81% · 2.13AST-24UW3SDBDJ01(O)Non-ducted, 2 tons
Capacity retention at 5°F	beats 5% · 38%APH3060E100AAlso listed as IPH3060E100ADucted, 5 tons and up	beats 73% · 89%AS-09UW3SXEDJ(O)Non-ducted, up to 1.5 tons
HSPF2	beats 39% · 7.8AHP5042E1000AAlso listed as IHP5042E1000ADucted, 3.5–4.5 tons	beats 79% · 10.5AS-09UR3SXEDJ(O)Non-ducted, up to 1.5 tons
SEER2	beats 40% · 15.2AHP5042E1000AAlso listed as IHP5042E1000ADucted, 3.5–4.5 tons	beats 96% · 27.5AS-09UR3SXEDJ(O)Non-ducted, up to 1.5 tons
EER2	beats 82% · 12.0AHP5042E1000AAlso listed as IHP5042E1000ADucted, 3.5–4.5 tons	beats 93% · 15.5AS-09UR3SXEDJ(O)Non-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 11% · 21,600 Btu/hAPH3060E100AAlso listed as IPH3060E100ADucted, 5 tons and up	beats 83% · 13,770 Btu/hAST-18UW3SBBDJ00(O)Non-ducted, up to 1.5 tons

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