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ECO AC vs IWAE heat pumps

Measured against models of the same size and duct type, ECO AC scores higher on 6 of the 6 ratings. ECO AC has 22 outdoor models, IWAE has 23 outdoor models. ECO AC and IWAE 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.
ECO AC and IWAE 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, ECO AC scores higher on 6 of the 6 ratings.
  • ECO AC
  • IWAE
  • Other ranked manufacturers
ECO ACIWAE

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingECO ACIWAE
Efficiency index59% (higher)median —52% (higher)median —
COP at 5°F44% (higher)median 1.9526% (higher)median 1.80
Capacity retention at 5°F68% (higher)median 90%61% (higher)median 80%
HSPF247% (higher)median 10.035% (higher)median 8.0
SEER264% (higher)median 21.040% (higher)median 17.0
EER268% (higher)median 12.336% (higher)median 11.2
Heating capacity at 5°F63% (higher)median 18,000 Btu/h50% (higher)median 16,250 Btu/h
Outdoor models2223
AHRI certifications3427

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardECO ACIWAE
CEE 2025 Tier 1 (Split ASHP)95.5%21 models34.8%8 models
CEE 2026 Tier 1 (Split ASHP)95.5%21 models34.8%8 models
CEE Advanced Tier (Split ASHP)13.6%3 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)95.5%21 models34.8%8 models
DOE Cold Climate Heat Pump Challenge13.6%3 models0%0 models
ENERGY STAR Cold Climate100%22 models26.1%6 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
  • ECO AC
  • IWAE
  • All models of the group
Ducted, up to 1.5 tons1.901,783 modelsDucted, 2 tons2.001,090 modelsDucted, 2.5–3 tons2.001,909 modelsDucted, 3.5–4.5 tons2.002,224 modelsNon-ducted, up to 1.5 tons1.953,455 modelsNon-ducted, 2 tons2.00863 modelsNon-ducted, 2.5–3 tons2.001,106 modelsNon-ducted, 3.5–4.5 tons2.00564 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 typeECO ACIWAE
Ducted, up to 1.5 tons1 · index 49%1 · index —
Ducted, 2 tons1 · index 55%2 · index 37%
Ducted, 2.5–3 tons3 · index 63%3 · index 52%
Ducted, 3.5–4.5 tons2 · index 74%5 · index 41%
Non-ducted, up to 1.5 tons10 · index 61%8 · index 58%
Non-ducted, 2 tons4 · index 55%2 · index 65%
Non-ducted, 2.5–3 tons4 · index 52%2 · index —
Non-ducted, 3.5–4.5 tons2 · index 62%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 typeECO ACCold-climate score, best modelIWAECold-climate score, best model
Ducted, up to 1.5 tons39.3(50 is the typical model of its size class)EMH-2O18KBB1 of 1 models qualify · AHRI 218461419None on this board (0 of 1 models qualify)
Ducted, 2 tons49.0(50 is the typical model of its size class) (higher)EMH-3O24KBB1 of 1 models qualify · AHRI 21846142142.5(50 is the typical model of its size class)**AESHV8T2421BAwith ducted air handler **AEAMPVT24D21BA1 of 2 models qualify · AHRI 217732895
Ducted, 2.5–3 tons76.9(50 is the typical model of its size class) (higher)EHI-O36KBBwith ducted air handler EHI-V36KBB3 of 3 models qualify · AHRI 21725840255.4(50 is the typical model of its size class)**AESHV9T3621BAwith ducted air handler **AEAMPVT36D21BA1 of 3 models qualify · AHRI 217732896
Ducted, 3.5–4.5 tons85.1(50 is the typical model of its size class) (higher)EHI-O60KBBwith ducted air handler EHI-V60KBB2 of 2 models qualify · AHRI 21725840143.2(50 is the typical model of its size class)**AESHV8T4821BAwith ducted air handler **AEAMPVT48F21BA2 of 5 models qualify · AHRI 217732897
Non-ducted, up to 1.5 tons87.2(50 is the typical model of its size class) (higher)EHP-O09KBBwith ductless indoor unit EHP-W09KBB10 of 10 models qualify · AHRI 21677232851.8(50 is the typical model of its size class)AEPL**MHV23S0932B1Awith ductless indoor unit AEPL**AWM23E0932B1A5 of 8 models qualify · AHRI 218451556
Non-ducted, 2 tons67.5(50 is the typical model of its size class) (higher)EMH-3O24KBB3 of 4 models qualify · AHRI 21677234061.6(50 is the typical model of its size class)AEPL**MHV22S2431B1Awith ductless indoor unit AEPL**AWM22E2431B1A1 of 2 models qualify · AHRI 218451561
Non-ducted, 2.5–3 tons77.2(50 is the typical model of its size class)EMH-4O36KBB4 of 4 models qualify · AHRI 216772342None on this board (0 of 2 models qualify)
Non-ducted, 3.5–4.5 tons66.5(50 is the typical model of its size class)EMH-5O42KBB2 of 2 models qualify · AHRI 216772343No 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 typeECO ACAll-around score, best modelIWAEAll-around score, best model
Ducted, up to 1.5 tons48.6(50 is the typical model of its size class)EMH-2O18KBB1 of 1 models have all five ratings · AHRI 218461419None on this board (0 of 1 models have all five ratings)
Ducted, 2 tons72.4(50 is the typical model of its size class) (higher)EHI-O36KBBwith ducted air handler EHI-V24KBB2 of 2 models have all five ratings · AHRI 21745274437.2(50 is the typical model of its size class)**AESHV8T2421BAwith ducted air handler **AEAMPVT24D21BA1 of 2 models have all five ratings · AHRI 217732895
Ducted, 2.5–3 tons61.6(50 is the typical model of its size class) (higher)EMH-4O30KBB2 of 2 models have all five ratings · AHRI 21846141751.6(50 is the typical model of its size class)**AESHV9T3621BAwith ducted air handler **AEAMPVT36D21BA1 of 3 models have all five ratings · AHRI 217732896
Ducted, 3.5–4.5 tons83.1(50 is the typical model of its size class) (higher)EHI-O60KBBwith ducted air handler EHI-V48KBB2 of 2 models have all five ratings · AHRI 21745274343.2(50 is the typical model of its size class)**AESHV8T4821BAwith ducted air handler **AEAMPVT48F21BA2 of 5 models have all five ratings · AHRI 217732897
Non-ducted, up to 1.5 tons92.6(50 is the typical model of its size class) (higher)EHP-O09KBBwith ductless indoor unit EHP-W09KBB10 of 10 models have all five ratings · AHRI 21677232863.4(50 is the typical model of its size class)AEPL**MHV23S1232B1Awith ductless indoor unit AEPL**AWM23E1232B1AAlso listed as AEPL**MHV23S1231B1A5 of 8 models have all five ratings · AHRI 218451557
Non-ducted, 2 tons78.1(50 is the typical model of its size class) (higher)EHP-O24KBBwith ductless indoor unit EHP-W24KBB4 of 4 models have all five ratings · AHRI 21677232564.8(50 is the typical model of its size class)AEPL**MHV22S2431B1Awith ductless indoor unit AEPL**AWM22E2431B1A1 of 2 models have all five ratings · AHRI 218451561
Non-ducted, 2.5–3 tons70.5(50 is the typical model of its size class)EMH-4O30KBB4 of 4 models have all five ratings · AHRI 216772341None on this board (0 of 2 models have all five ratings)
Non-ducted, 3.5–4.5 tons67.7(50 is the typical model of its size class)EMH-5O42KBB2 of 2 models have all five ratings · AHRI 216772343No 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
RatingECO ACIWAE
COP at 5°Fbeats 88% · 2.10EMH-4O36KBBNon-ducted, 2.5–3 tonsbeats 71% · 2.10AEPL**MHV22S2431B1ANon-ducted, 2 tons
Capacity retention at 5°Fbeats 94% · 100%EHP-O24KBBNon-ducted, 2 tonsbeats 70% · 89%AEPL**MHV23S0932B1ANon-ducted, up to 1.5 tons
HSPF2beats 90% · 10.5EHI-O60KBBDucted, 3.5–4.5 tonsbeats 69% · 10.0AEPL**MHV22S2431B1ANon-ducted, 2 tons
SEER2beats 99% · 27.0EHP-O24KBBNon-ducted, 2 tonsbeats 82% · 19.0**AESHV9T3621BADucted, 2.5–3 tons
EER2beats 98% · 16.8EHP-O09KBBNon-ducted, up to 1.5 tonsbeats 70% · 13.0AEPL**MHV23S1232B1AAlso listed as AEPL**MHV23S1231B1ANon-ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 98% · 54,000 Btu/hEHI-O60KBBDucted, 3.5–4.5 tonsbeats 86% · 15,000 Btu/hAEPL**MHV22S1831B1ANon-ducted, up to 1.5 tons

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