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.

Bosch and DIRECT AIR 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, DIRECT AIR scores higher on 5 of the 6 ratings.

Bosch
DIRECT AIR
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	Bosch	DIRECT AIR
Efficiency index	62%median — · 3rd ranked	67%median —
COP at 5°F	63% (higher)median 2.10 · 5th ranked	62% (higher)median 2.00
Capacity retention at 5°F	62%median 75% · 4th ranked	64%median 83%
HSPF2	68%median 9.5 · 4th ranked	76%median 10.3
SEER2	65%median 19.0 · 3rd ranked	71%median 20.5
EER2	55%median 11.7 · 12th ranked	62%median 12.0
Heating capacity at 5°F	65%median 23,000 Btu/h · 4th ranked	66%median 26,000 Btu/h
Outdoor models	47	47
AHRI certifications	1,789	198

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	Bosch	DIRECT AIR
CEE 2025 Tier 1 (Split ASHP)	93.6%44 models	93.6%44 models
CEE 2026 Tier 1 (Split ASHP)	91.5%43 models	93.6%44 models
CEE Advanced Tier (Split ASHP)	14.9%7 models	2.1%1 models
Xcel Energy Colorado cold-climate ASHP (2025)	83%39 models	85.1%40 models
DOE Cold Climate Heat Pump Challenge	14.9%7 models	2.1%1 models
ENERGY STAR Cold Climate	85.1%40 models	87.2%41 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 · 10 groups where both have models

Bosch
DIRECT AIR
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	Bosch	DIRECT AIR
Ducted, up to 1.5 tons	10 · index 70%	12 · index 73%
Ducted, 2 tons	7 · index 65%	6 · index 63%
Ducted, 2.5–3 tons	12 · index 55%	13 · index 69%
Ducted, 3.5–4.5 tons	11 · index 68%	11 · index 65%
Ducted, 5 tons and up	4 · index 63%	1 · index 63%
Non-ducted, up to 1.5 tons	9 · index 71%	11 · index 75%
Non-ducted, 2 tons	3 · index 64%	2 · index 82%
Non-ducted, 2.5–3 tons	10 · index 51%	13 · index 61%
Non-ducted, 3.5–4.5 tons	3 · index 60%	8 · index 55%
Non-ducted, 5 tons and up	2 · index 35%	1 · index 59%

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	BoschCold-climate score, best model	DIRECT AIRCold-climate score, best model
Ducted, up to 1.5 tons	80.1(50 is the typical model of its size class)BMS500-AAS009-1CSXRDwith ducted air handler BMS500-AAU009-1AHDXD10 of 10 models qualify · AHRI 215223297	82.3(50 is the typical model of its size class) (higher)DIRM4-18HXPRO28-1Zwith ducted air handler DIRM4-18HP-DU11 of 12 models qualify · AHRI 217447834
Ducted, 2 tons	85.7(50 is the typical model of its size class)BMS500-AAS024-1CSXHDwith ducted air handler BMS500-AAU024-1AHDXD8 of 8 models qualify · AHRI 215223291	85.7(50 is the typical model of its size class)DIRM4-24HXPRO28-1Zwith ducted air handler DIRM4-24HP-DU6 of 6 models qualify · AHRI 216788527
Ducted, 2.5–3 tons	83.7(50 is the typical model of its size class) (higher)BOVB-36MTB-M19Ewith ducted air handler BIVB-36MCB-M19X8 of 12 models qualify · AHRI 217903121	83.2(50 is the typical model of its size class)DIRM4-36LCHX-1Zwith ducted air handler DIRM4-36HP-DU11 of 13 models qualify · AHRI 216788531
Ducted, 3.5–4.5 tons	90.9(50 is the typical model of its size class) (higher)BOVA-60MTB-M19Ewith ducted air handler AE*L+DM60B4Z+TXV+TDR10 of 10 models qualify · AHRI 218693518	82.7(50 is the typical model of its size class)DIRM4-48HXPRO28-5ZAlso listed as DIRM4-48HXPRO28-6Z11 of 11 models qualify · AHRI 215213809
Ducted, 5 tons and up	63.4(50 is the typical model of its size class)BPBA-60RCB-M18SAlso listed as BPBB-60RTB-M18S3 of 4 models qualify · AHRI 216011943	None on this board (0 of 1 models qualify)
Non-ducted, up to 1.5 tons	97.5(50 is the typical model of its size class) (higher)BMS500-AAS009-1CSXRDwith ductless indoor unit BMS500-AAU006-1AHWXD8 of 9 models qualify · AHRI 217656832	96.7(50 is the typical model of its size class)DIRM4-06HXPRO28-1Zwith ductless indoor unit DIRM4-06HP-WM11 of 11 models qualify · AHRI 216571371
Non-ducted, 2 tons	89.4(50 is the typical model of its size class)BMS500-AAS024-1CSXHDwith ductless indoor unit BMS500-AAU024-1AHCXD3 of 3 models qualify · AHRI 215223292	89.4(50 is the typical model of its size class)DIRM4-24HXPRO28-1Zwith ductless indoor unit DIRM4-24HP-CA2 of 2 models qualify · AHRI 216788526
Non-ducted, 2.5–3 tons	78.0(50 is the typical model of its size class)BMS500-AAM036-1CSXHD8 of 10 models qualify · AHRI 215223324	89.4(50 is the typical model of its size class) (higher)DIRM4-36LCHX-1Zwith ductless indoor unit DIRM4-36HP-CF11 of 13 models qualify · AHRI 216571385
Non-ducted, 3.5–4.5 tons	73.4(50 is the typical model of its size class)BMS500-AAM048-1CSXHD3 of 3 models qualify · AHRI 215223327	73.4(50 is the typical model of its size class)DIRM4-48HXPRO28-5ZAlso listed as DIRM4-48HXPRO28-6Z7 of 8 models qualify · AHRI 215213810
Non-ducted, 5 tons and up	50.6(50 is the typical model of its size class)BOHA-60MTB-M18S2 of 2 models qualify · AHRI 218059677	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	BoschAll-around score, best model	DIRECT AIRAll-around score, best model
Ducted, up to 1.5 tons	86.7(50 is the typical model of its size class) (higher)BMS500-AAS009-1CSXHDwith ducted air handler BMS500-AAU009-1AHDXD10 of 10 models have all five ratings · AHRI 215223281	86.5(50 is the typical model of its size class)DIRM4-09HXPRO28-1Zwith ducted air handler DIRM4-09HP-DU12 of 12 models have all five ratings · AHRI 217447830
Ducted, 2 tons	85.6(50 is the typical model of its size class) (higher)BOVA-36RTB-M20Swith ducted air handler L(E,G)M36FJ9 of 9 models have all five ratings · AHRI 217887951	78.8(50 is the typical model of its size class)DIRM4-24DA25-1Zwith ducted air handler DIRM4-24HP-DU6 of 6 models have all five ratings · AHRI 216788529
Ducted, 2.5–3 tons	83.6(50 is the typical model of its size class)BMS500-AAM036-1CSXHD10 of 10 models have all five ratings · AHRI 215223323	83.6(50 is the typical model of its size class)DIRM4-36HXPRO28-4ZAlso listed as DIRM4-36HXPRO28-5Z13 of 13 models have all five ratings · AHRI 215213806
Ducted, 3.5–4.5 tons	86.3(50 is the typical model of its size class) (higher)BOVA-60MTB-M19Ewith ducted air handler (V,R)60H210P19*+TXV+AEFE511 of 11 models have all five ratings · AHRI 218796938	85.1(50 is the typical model of its size class)DIRM4-48DA25-5ZAlso listed as DIRM4-48DA25-6Z11 of 11 models have all five ratings · AHRI 215213797
Ducted, 5 tons and up	70.1(50 is the typical model of its size class) (higher)BPBA-60RCB-M18SAlso listed as BPBB-60RTB-M18S4 of 4 models have all five ratings · AHRI 216011943	62.5(50 is the typical model of its size class)DIRM4-60DA25-6Z1 of 1 models have all five ratings · AHRI 218331780
Non-ducted, up to 1.5 tons	95.8(50 is the typical model of its size class)BMS500-AAS009-1CSXRDwith ductless indoor unit BMS500-AAU006-1AHWXD9 of 9 models have all five ratings · AHRI 217656832	96.2(50 is the typical model of its size class) (higher)DIRM4-06HXPRO28-1Zwith ductless indoor unit DIRM4-06HP-WM11 of 11 models have all five ratings · AHRI 216571371
Non-ducted, 2 tons	86.8(50 is the typical model of its size class)BMS500-AAS024-1CSXRDwith ductless indoor unit BMS500-AAU024-1AHWXD3 of 3 models have all five ratings · AHRI 215223306	86.8(50 is the typical model of its size class)DIRM4-24DA25-1Zwith ductless indoor unit DIRM4-24HP-WM2 of 2 models have all five ratings · AHRI 216571370
Non-ducted, 2.5–3 tons	78.3(50 is the typical model of its size class)BMS500-AAM036-1CSXHD10 of 10 models have all five ratings · AHRI 215223322	78.3(50 is the typical model of its size class)DIRM4-36HXPRO28-4ZAlso listed as DIRM4-36HXPRO28-5Z13 of 13 models have all five ratings · AHRI 215213805
Non-ducted, 3.5–4.5 tons	75.6(50 is the typical model of its size class)BMS500-AAM048-1CSXHD3 of 3 models have all five ratings · AHRI 215223325	75.6(50 is the typical model of its size class)DIRM4-48HXPRO28-5ZAlso listed as DIRM4-48HXPRO28-6Z8 of 8 models have all five ratings · AHRI 215213808
Non-ducted, 5 tons and up	36.0(50 is the typical model of its size class)BOHA-60MTB-M18S2 of 2 models have all five ratings · AHRI 218059677	58.6(50 is the typical model of its size class) (higher)DIRM4-60DA25-6Z1 of 1 models have all five ratings · AHRI 218331779

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	Bosch	DIRECT AIR
COP at 5°F	beats 99% · 2.73BOHA-24MTB-M18SDucted, up to 1.5 tons	beats 99% · 2.51DIRM4-12DA25-1ZNon-ducted, up to 1.5 tons
Capacity retention at 5°F	beats 100% · 127%BOVA-60MTB-M19EDucted, 3.5–4.5 tons	beats 98% · 126%DIRM4-09HXPRO28-1ZNon-ducted, up to 1.5 tons
HSPF2	beats 99% · 11.0BMS500-AAM048-1CSXHDDucted, 3.5–4.5 tons	beats 99% · 14.8DIRM4-06HXPRO28-1ZNon-ducted, up to 1.5 tons
SEER2	beats 97% · 25.0BMS500-AAM027-1CSXRDNon-ducted, 2.5–3 tons	beats 97% · 25.0DIRM4-27DA25-3Z*Also listed as DIRM4-27DA25-4ZNon-ducted, 2.5–3 tons
EER2	beats 100% · 18.1BMS500-AAS009-1CSXRDNon-ducted, up to 1.5 tons	beats 99% · 18.0DIRM4-06HXPRO28-1ZNon-ducted, up to 1.5 tons
Heating capacity at 5°F	beats 100% · 64,000 Btu/hBOVA-60MTB-M19EDucted, 3.5–4.5 tons	beats 98% · 39,500 Btu/hDIRM4-36LCHX-1ZNon-ducted, 2.5–3 tons

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Bosch vs DIRECT AIR heat pumps