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STEALTH vs WABBAN heat pumps

Measured against models of the same size and duct type, STEALTH scores higher on 5 of the 6 ratings. STEALTH has 42 outdoor models, WABBAN has 41 outdoor models. STEALTH and WABBAN have no QMID on file and are not ranked.

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CompareData as of updated · 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.
STEALTH and WABBAN 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, STEALTH scores higher on 5 of the 6 ratings.
  • STEALTH
  • WABBAN
  • Other ranked manufacturers
STEALTHWABBAN

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingSTEALTHWABBAN
Efficiency index57% (higher)median —50% (higher)median —
COP at 5°F45% (higher)median 1.9335% (higher)median 1.81
Capacity retention at 5°F61% (higher)median 80%60% (higher)median 75%
HSPF269% (higher)median 9.540% (higher)median 8.5
SEER261% (higher)median 18.349% (higher)median 20.0
EER245%median 10.548%median 11.3
Heating capacity at 5°F62% (higher)median 22,765 Btu/h56% (higher)median 16,100 Btu/h
Outdoor models4241
AHRI certifications11963

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardSTEALTHWABBAN
CEE 2025 Tier 1 (Split ASHP)61.9%26 models56.1%23 models
CEE 2026 Tier 1 (Split ASHP)52.4%22 models53.7%22 models
CEE Advanced Tier (Split ASHP)2.4%1 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)47.6%20 models51.2%21 models
DOE Cold Climate Heat Pump Challenge2.4%1 models0%0 models
ENERGY STAR Cold Climate50%21 models0%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 · 7 groups where both have models
  • STEALTH
  • WABBAN
  • All models of the group
Ducted, up to 1.5 tons2.00884 modelsDucted, 2 tons2.00821 modelsDucted, 2.5–3 tons1.901,614 modelsDucted, 3.5–4.5 tons1.911,492 modelsNon-ducted, up to 1.5 tons1.902,417 modelsNon-ducted, 2 tons1.87611 modelsNon-ducted, 2.5–3 tons1.85975 modelsNon-ducted, 3.5–4.5 tons1.97438 modelsmedian

Raw ratings are only placed side by side within one size and duct type, where they are comparable.

Source: AHRI Directory · as of

Models per peer group · efficiency index within the group
Size and duct typeSTEALTHWABBAN
Ducted, up to 1.5 tons8 · index 60%2 · index 43%
Ducted, 2 tons3 · index 69%2 · index 36%
Ducted, 2.5–3 tons11 · index 54%6 · index 43%
Ducted, 3.5–4.5 tons10 · index 54%4 · index 41%
Non-ducted, up to 1.5 tons10 · index 58%22 · index 52%
Non-ducted, 2 tons2 · index 50%5 · index 63%
Non-ducted, 2.5–3 tons9 · index 59%6 · index 60%
Non-ducted, 3.5–4.5 tons6 · index 52%None

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 typeSTEALTHCold-climate score, best modelWABBANCold-climate score, best model
Ducted, up to 1.5 tons86.9(50 is the typical model of its size class) (higher)ACIQ-18-HPBwith ducted air handler ACIQ-18W-WM7 of 8 models qualify · AHRI 21343330537.0(50 is the typical model of its size class)BB12HXP2A1DO*with ducted air handler BBM12HSFDI2 of 2 models qualify · AHRI 216743379
Ducted, 2 tons79.4(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Bwith ducted air handler ACIQ-24CD-HH-MB3 of 3 models qualify · AHRI 21231616755.6(50 is the typical model of its size class)BB36-24WADUwith ducted air handler BBD24-24AH2ADU2 of 3 models qualify · AHRI 207196961
Ducted, 2.5–3 tons79.9(50 is the typical model of its size class) (higher)ACIQ-36ZPL-HP230Bwith ducted air handler ACIQ-36CD-HH-MB6 of 11 models qualify · AHRI 21231619154.7(50 is the typical model of its size class)BBM30HX4O*3 of 5 models qualify · AHRI 216743364
Ducted, 3.5–4.5 tons86.4(50 is the typical model of its size class) (higher)ACIQ-48ZPL-HP230Bwith ducted air handler ACIQ-48CD-HH-MB6 of 10 models qualify · AHRI 21231619260.3(50 is the typical model of its size class)BB60-48WADUwith ducted air handler BBD48-24AH2ADU1 of 4 models qualify · AHRI 207196959
Non-ducted, up to 1.5 tons89.3(50 is the typical model of its size class) (higher)ACIQ-06ZPL-HP230Bwith ductless indoor unit ACIQ-06W-HH-MC5 of 10 models qualify · AHRI 21231618480.1(50 is the typical model of its size class)BB09HQ4D6DO*with ductless indoor unit BB09HQ4D6DI13 of 22 models qualify · AHRI 216743350
Non-ducted, 2 tons85.4(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Bwith ductless indoor unit ACIQ-24FM-HH-MB1 of 2 models qualify · AHRI 21231617076.1(50 is the typical model of its size class)BBM24HX4O*3 of 5 models qualify · AHRI 216743360
Non-ducted, 2.5–3 tons79.3(50 is the typical model of its size class) (higher)ACIQ-36Z-HH-M4B3 of 9 models qualify · AHRI 21231617773.7(50 is the typical model of its size class)BBM42HX4O*5 of 6 models qualify · AHRI 216743358
Non-ducted, 3.5–4.5 tons76.8(50 is the typical model of its size class)ACIQ-60ZPL-HP230Bwith ductless indoor unit ACIQ-60FM-HH-MB4 of 6 models qualify · AHRI 212316196No models in this size class

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 typeSTEALTHAll-around score, best modelWABBANAll-around score, best model
Ducted, up to 1.5 tons85.2(50 is the typical model of its size class) (higher)ACIQ-09ZPL-HP230Bwith ducted air handler ACIQ-09CD-HH-MB8 of 8 models have all five ratings · AHRI 21231616455.2(50 is the typical model of its size class)BB12HXP2A1DO*with ducted air handler BBM12HSFDI2 of 2 models have all five ratings · AHRI 216743379
Ducted, 2 tons80.1(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Bwith ducted air handler ACIQ-24CD-HH-MB3 of 3 models have all five ratings · AHRI 21231616762.0(50 is the typical model of its size class)BB36-24WADUwith ducted air handler BBD24-24AH2ADU3 of 3 models have all five ratings · AHRI 207196961
Ducted, 2.5–3 tons75.4(50 is the typical model of its size class) (higher)ES-27Z-M3B11 of 11 models have all five ratings · AHRI 21231621053.1(50 is the typical model of its size class)BBM30HX4O*5 of 5 models have all five ratings · AHRI 216743364
Ducted, 3.5–4.5 tons82.0(50 is the typical model of its size class) (higher)ACIQ-48Z-HH-M5B9 of 9 models have all five ratings · AHRI 21231618164.3(50 is the typical model of its size class)BB60-48WADUwith ducted air handler BBD48-24AH2ADU4 of 4 models have all five ratings · AHRI 207196959
Ducted, 5 tons and up41.7(50 is the typical model of its size class)ACIQ-60-EHPBwith ducted air handler ACIQ-60AHB1 of 1 models have all five ratings · AHRI 213433299No models in this size class
Non-ducted, up to 1.5 tons92.0(50 is the typical model of its size class) (higher)ACIQ-06ZPL-HP230Bwith ductless indoor unit ACIQ-06W-HH-MC10 of 10 models have all five ratings · AHRI 21231618488.7(50 is the typical model of its size class)BB09HQ4D6DO*with ductless indoor unit BB09HQ4D6DI15 of 22 models have all five ratings · AHRI 216743350
Non-ducted, 2 tons84.3(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Bwith ductless indoor unit ACIQ-24W-HH-MB2 of 2 models have all five ratings · AHRI 21231616076.3(50 is the typical model of its size class)BB24HQ3D6DO*with ductless indoor unit BB24HQ3D6DI3 of 5 models have all five ratings · AHRI 216743347
Non-ducted, 2.5–3 tons82.8(50 is the typical model of its size class) (higher)ACIQ-36Z-HH-M4B7 of 9 models have all five ratings · AHRI 21231617770.2(50 is the typical model of its size class)BBM42HX4O*5 of 6 models have all five ratings · AHRI 216743358
Non-ducted, 3.5–4.5 tons77.9(50 is the typical model of its size class)ACIQ-48Z-HH-M5B6 of 6 models have all five ratings · AHRI 212316180No models in this size class

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
RatingSTEALTHWABBAN
COP at 5°Fbeats 91% · 2.21ACIQ-24ZPL-HP230BNon-ducted, 2 tonsbeats 89% · 2.21BBM18HX4O*Non-ducted, up to 1.5 tons
Capacity retention at 5°Fbeats 95% · 113%ACIQ-06ZPL-HP230BNon-ducted, up to 1.5 tonsbeats 99% · 144%BB09HQ4D6DO*Non-ducted, up to 1.5 tons
HSPF2beats 99% · 10.3ACIQ-48ZPL-HP230BDucted, 3.5–4.5 tonsbeats 88% · 11.0BB09HQ4D6DO*Non-ducted, up to 1.5 tons
SEER2beats 99% · 24.6ES-27Z-M3BNon-ducted, 2.5–3 tonsbeats 96% · 27.5BB09UW3SXETE00/ONon-ducted, up to 1.5 tons
EER2beats 98% · 16.2ACIQ-09ZPL-HP230BNon-ducted, up to 1.5 tonsbeats 99% · 16.6BB09HQ4D6DO*Non-ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 99% · 56,500 Btu/hACIQ-60ZPL-HP230BNon-ducted, 3.5–4.5 tonsbeats 96% · 20,000 Btu/hBB18HQ3D6DO*Non-ducted, up to 1.5 tons

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