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.

AIRTEMP and Bosch 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, Bosch scores higher on 4 of the 6 ratings.

AIRTEMP
Bosch
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	AIRTEMP	Bosch
Efficiency index	45%median —	65%median — · 4th ranked
COP at 5°F	32%median 1.81	55%median 2.00 · 12th ranked
Capacity retention at 5°F	65% (higher)median 77%	60% (higher)median 73% · 8th ranked
HSPF2	37%median 8.5	69%median 9.3 · 4th ranked
SEER2	38%median 17.0	70%median 19.2 · 2nd ranked
EER2	44%median 11.0	58%median 11.7 · 8th ranked
Heating capacity at 5°F	63% (higher)median 19,800 Btu/h	56% (higher)median 20,000 Btu/h · 12th ranked
Outdoor models	25	50
AHRI certifications	58	1,560

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	AIRTEMP	Bosch
CEE 2025 Tier 1 (Split ASHP)	48%12 models	76%38 models
CEE 2026 Tier 1 (Split ASHP)	48%12 models	76%38 models
CEE Advanced Tier (Split ASHP)	0%0 models	2%1 models
Xcel Energy Colorado cold-climate ASHP (2025)	52%13 models	64%32 models
DOE Cold Climate Heat Pump Challenge	0%0 models	2%1 models
ENERGY STAR Cold Climate	32%8 models	30%15 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 · 7 groups where both have models

AIRTEMP
Bosch
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	AIRTEMP	Bosch
Ducted, up to 1.5 tons	2 · index 31%	11 · index 65%
Ducted, 2 tons	3 · index 53%	9 · index 72%
Ducted, 2.5–3 tons	6 · index 52%	12 · index 58%
Ducted, 3.5–4.5 tons	4 · index 63%	7 · index 68%
Ducted, 5 tons and up	None	5 · index 60%
Non-ducted, up to 1.5 tons	8 · index 28%	11 · index 68%
Non-ducted, 2 tons	2 · index 57%	2 · index 81%
Non-ducted, 2.5–3 tons	5 · index 60%	10 · index 61%
Non-ducted, 3.5–4.5 tons	None	4 · index 58%

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	AIRTEMPCold-climate score, best model	BoschCold-climate score, best model
Ducted, up to 1.5 tons	35.6(50 is the typical model of its size class)GXH18(5.3)FMK4DH-11 of 2 models qualify · AHRI 210276818	75.2(50 is the typical model of its size class) (higher)BMS500-AAS009-1CSXHBwith ducted air handler BMS500-AAU009-1AHDXB10 of 11 models qualify · AHRI 204014467
Ducted, 2 tons	50.1(50 is the typical model of its size class)GXH24(7.0)FMK4DH-11 of 2 models qualify · AHRI 210276819	82.3(50 is the typical model of its size class) (higher)BMS500-AAS024-1CSXHBwith ducted air handler BMS500-AAU024-1AHDXB8 of 8 models qualify · AHRI 204014470
Ducted, 2.5–3 tons	55.3(50 is the typical model of its size class)GXH24-36MSK4DHwith ducted air handler GMH**-36MSK4DH14 of 7 models qualify · AHRI 206724409	89.0(50 is the typical model of its size class) (higher)BOVD-36HDN1-M20Gwith indoor coil D(A,C,E)36C44+TDR and furnace BGH96M100C5B5 of 12 models qualify · AHRI 215375438
Ducted, 3.5–4.5 tons	58.1(50 is the typical model of its size class)GXH48-60MSK4DHwith ducted air handler GMH48-**MSK4DH11 of 4 models qualify · AHRI 206724410	88.1(50 is the typical model of its size class) (higher)BOVA-60HDN1-M20Gwith ducted air handler L(E,G)M48G45 of 8 models qualify · AHRI 212675690
Ducted, 5 tons and up	No models in this size class	70.2(50 is the typical model of its size class)BRB-60HWD1N1-M19Also listed as BRBA-60HWD1N1-M182 of 5 models qualify · AHRI 202680590
Non-ducted, up to 1.5 tons	73.1(50 is the typical model of its size class)GXH18(5.3)FMK4DH-17 of 8 models qualify · AHRI 210276805	89.3(50 is the typical model of its size class) (higher)BMS500-AAS009-1CSXRCwith ductless indoor unit BMS500-AAU006-1AHWXC7 of 11 models qualify · AHRI 207759993
Non-ducted, 2 tons	76.1(50 is the typical model of its size class)GXH24(7.0)FMK4DH-12 of 2 models qualify · AHRI 210276806	86.1(50 is the typical model of its size class) (higher)BMS500-AAS024-1CSXHCwith ductless indoor unit BMS500-AAU024-1AHCXC2 of 2 models qualify · AHRI 207760018
Non-ducted, 2.5–3 tons	73.7(50 is the typical model of its size class)GXH42(12.3)FMK4DH-15 of 5 models qualify · AHRI 210276804	79.3(50 is the typical model of its size class) (higher)BMS500-AAM036-1CSXHC3 of 10 models qualify · AHRI 207760039
Non-ducted, 3.5–4.5 tons	No models in this size class	76.2(50 is the typical model of its size class)BMS500-AAM048-1CSXHC1 of 4 models qualify · AHRI 207760042

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	AIRTEMPAll-around score, best model	BoschAll-around score, best model
Ducted, up to 1.5 tons	31.2(50 is the typical model of its size class)GXH18(5.3)FMK4DH-11 of 2 models have all five ratings · AHRI 210276818	85.2(50 is the typical model of its size class) (higher)BMS500-AAS009-1CSXHCwith ducted air handler BMS500-AAU009-1AHDXB11 of 11 models have all five ratings · AHRI 207760001
Ducted, 2 tons	60.8(50 is the typical model of its size class)GXH24-36MSK4DHwith ducted air handler GMH24-**MSK4DH12 of 3 models have all five ratings · AHRI 206724408	87.9(50 is the typical model of its size class) (higher)BOVA-36HDN1-M20Gwith ducted air handler AE(D,N,U)+CM36B34+TDR9 of 9 models have all five ratings · AHRI 213885831
Ducted, 2.5–3 tons	53.1(50 is the typical model of its size class)GXH30(8.8)FMK4DH-13 of 6 models have all five ratings · AHRI 210276820	85.5(50 is the typical model of its size class) (higher)BOVD-36HDN1-M20Gwith indoor coil D(A,C,E)36C44+TDR and furnace BGH96M100C5B11 of 12 models have all five ratings · AHRI 215375438
Ducted, 3.5–4.5 tons	63.3(50 is the typical model of its size class)GXH48-60MSK4DHwith ducted air handler GMH48-**MSK4DH11 of 4 models have all five ratings · AHRI 206724410	88.4(50 is the typical model of its size class) (higher)BOVA-60HDN1-M20Gwith ducted air handler L(E,G)M48G46 of 7 models have all five ratings · AHRI 212675690
Ducted, 5 tons and up	No models in this size class	75.1(50 is the typical model of its size class)BRB-60HWD1N1-M19Also listed as BRBA-60HWD1N1-M185 of 5 models have all five ratings · AHRI 202680590
Non-ducted, up to 1.5 tons	58.0(50 is the typical model of its size class)GXH18(5.3)FMK4DH-18 of 8 models have all five ratings · AHRI 210276805	92.0(50 is the typical model of its size class) (higher)BMS500-AAS009-1CSXRCwith ductless indoor unit BMS500-AAU006-1AHWXC11 of 11 models have all five ratings · AHRI 207759993
Non-ducted, 2 tons	71.5(50 is the typical model of its size class)GXH24(7.0)FMK4DH-12 of 2 models have all five ratings · AHRI 210276806	84.3(50 is the typical model of its size class) (higher)BMS500-AAS024-1CSXHCwith ductless indoor unit BMS500-AAU024-1AHWXC2 of 2 models have all five ratings · AHRI 207759997
Non-ducted, 2.5–3 tons	70.2(50 is the typical model of its size class)GXH42(12.3)FMK4DH-15 of 5 models have all five ratings · AHRI 210276804	82.8(50 is the typical model of its size class) (higher)BMS500-AAM036-1CSXHC8 of 10 models have all five ratings · AHRI 207760039
Non-ducted, 3.5–4.5 tons	No models in this size class	77.9(50 is the typical model of its size class)BMS500-AAM048-1CSXHC3 of 4 models have all five ratings · AHRI 207760042

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	AIRTEMP	Bosch
COP at 5°F	beats 89% · 2.21GXH18(5.3)FMK4DH-1Non-ducted, up to 1.5 tons	beats 99% · 3.03BOVD-36HDN1-M20GDucted, 2.5–3 tons
Capacity retention at 5°F	beats 85% · 89%GXH30(8.8)FMK4DH-1Ducted, 2.5–3 tons	beats 100% · 126%BOVD-36HDN1-M20GDucted, 2.5–3 tons
HSPF2	beats 82% · 10.0GXH36(10.6)FMK4DH-1Non-ducted, 2.5–3 tons	beats 98% · 13.6BMS500-AAS009-1CSXRCNon-ducted, up to 1.5 tons
SEER2	beats 83% · 24.0GXH12(3.5)LSK4DH2Non-ducted, up to 1.5 tons	beats 99% · 24.6BMS500-AAM027-1CSXRCNon-ducted, 2.5–3 tons
EER2	beats 84% · 12.5GXH30(8.8)FMK4DH-1Non-ducted, 2.5–3 tons	beats 98% · 16.2BMS500-AAS009-1CSXHCNon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 86% · 14,500 Btu/hGXH18(5.3)LSK4DH2Non-ducted, up to 1.5 tons	beats 96% · 20,000 Btu/hBMS500-AAM018-1CSXHCNon-ducted, up to 1.5 tons

More comparisons

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AIRTEMP vs Bosch heat pumps