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EMI vs ISLANDAIRE heat pumps

Measured against models of the same size and duct type, EMI scores higher on 6 of the 6 ratings. EMI has 15 outdoor models, ISLANDAIRE has 15 outdoor models. EMI and ISLANDAIRE 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.
EMI and ISLANDAIRE 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, EMI scores higher on 6 of the 6 ratings.
  • EMI
  • ISLANDAIRE
  • Other ranked manufacturers
EMIISLANDAI…

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingEMIISLANDAIRE
Efficiency index62% (higher)median —17% (higher)median —
COP at 5°F56% (higher)median 2.0022% (higher)median 1.67
Capacity retention at 5°F63% (higher)median 95%17% (higher)median 56%
HSPF269% (higher)median 10.55% (higher)median 6.6
SEER261% (higher)median 21.419% (higher)median 14.4
EER260% (higher)median 12.520% (higher)median 10.4
Heating capacity at 5°F60% (higher)median 18,000 Btu/h33% (higher)median 6,900 Btu/h
Outdoor models1515
AHRI certifications2715

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardEMIISLANDAIRE
CEE 2025 Tier 1 (Split ASHP)86.7%13 models0%0 models
CEE 2026 Tier 1 (Split ASHP)86.7%13 models0%0 models
CEE Advanced Tier (Split ASHP)6.7%1 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)73.3%11 models0%0 models
DOE Cold Climate Heat Pump Challenge6.7%1 models0%0 models
ENERGY STAR Cold Climate73.3%11 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 · 1 groups where both have models
  • EMI
  • ISLANDAIRE
  • 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 typeEMIISLANDAIRE
Ducted, up to 1.5 tons1 · index 77%14 · index 18%
Ducted, 2.5–3 tons2 · index 81%None
Ducted, 3.5–4.5 tons1 · index 84%None
Ducted, 2 tonsNone1 · index 11%
Non-ducted, up to 1.5 tons8 · index 60%None
Non-ducted, 2 tons2 · index 53%None
Non-ducted, 2.5–3 tons4 · index 46%None
Non-ducted, 3.5–4.5 tons1 · index 76%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 typeEMICold-climate score, best modelISLANDAIRECold-climate score, best model
Ducted, up to 1.5 tons70.8(50 is the typical model of its size class) (higher)EMXMZ218DA1 of 1 models qualify · AHRI 21544494141.3(50 is the typical model of its size class)EZMB10L9A1S95AA3 of 14 models qualify · AHRI 218722968
Ducted, 2 tonsNo models in this size classNone on this board (0 of 1 models qualify)
Ducted, 2.5–3 tons82.5(50 is the typical model of its size class)EMXMZ436DA2 of 2 models qualify · AHRI 215444947No models in this size class
Ducted, 3.5–4.5 tons82.7(50 is the typical model of its size class)EMXMZ548DA1 of 1 models qualify · AHRI 215444950No models in this size class
Non-ducted, up to 1.5 tons96.7(50 is the typical model of its size class)EMXSZ106DAwith ductless indoor unit EMXWAL06DA6 of 8 models qualify · AHRI 215444935No models in this size class
Non-ducted, 2 tons88.4(50 is the typical model of its size class)EMXSZ124DAwith ductless indoor unit EMXWAL24DA2 of 2 models qualify · AHRI 215444939No models in this size class
Non-ducted, 2.5–3 tons78.0(50 is the typical model of its size class)EMXMZ436DA2 of 4 models qualify · AHRI 215444948No models in this size class
Non-ducted, 3.5–4.5 tons73.4(50 is the typical model of its size class)EMXMZ548DA1 of 1 models qualify · AHRI 215444951No 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 typeEMIAll-around score, best modelISLANDAIREAll-around score, best model
Ducted, up to 1.5 tons77.4(50 is the typical model of its size class) (higher)EMXMZ218DA1 of 1 models have all five ratings · AHRI 21544494136.3(50 is the typical model of its size class)EZMB10L9A1S95AA14 of 14 models have all five ratings · AHRI 218722968
Ducted, 2 tonsNo models in this size class11.2(50 is the typical model of its size class)EZVV24L**1N*7A*1 of 1 models have all five ratings · AHRI 218807233
Ducted, 2.5–3 tons83.6(50 is the typical model of its size class)EMXMZ436DA2 of 2 models have all five ratings · AHRI 215444947No models in this size class
Ducted, 3.5–4.5 tons83.9(50 is the typical model of its size class)EMXMZ548DA1 of 1 models have all five ratings · AHRI 215444950No models in this size class
Non-ducted, up to 1.5 tons96.2(50 is the typical model of its size class)EMXSZ106DAwith ductless indoor unit EMXWAL06DA8 of 8 models have all five ratings · AHRI 215444935No models in this size class
Non-ducted, 2 tons76.4(50 is the typical model of its size class)EMXSZ124DAwith ductless indoor unit EMXWAL24DA2 of 2 models have all five ratings · AHRI 215444939No models in this size class
Non-ducted, 2.5–3 tons78.3(50 is the typical model of its size class)EMXMZ436DA4 of 4 models have all five ratings · AHRI 215444946No models in this size class
Non-ducted, 3.5–4.5 tons75.6(50 is the typical model of its size class)EMXMZ548DA1 of 1 models have all five ratings · AHRI 215444949No 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
RatingEMIISLANDAIRE
COP at 5°Fbeats 97% · 2.40EMXSZ106DANon-ducted, up to 1.5 tonsbeats 89% · 2.32EZMB10L9A1S95AADucted, up to 1.5 tons
Capacity retention at 5°Fbeats 94% · 110%EMXSZ106DANon-ducted, up to 1.5 tonsbeats 41% · 72%EZMB10L5A1S95AADucted, up to 1.5 tons
HSPF2beats 99% · 14.8EMXSZ106DANon-ducted, up to 1.5 tonsbeats 13% · 7.5EZMB10L5A1S95AADucted, up to 1.5 tons
SEER2beats 96% · 20.4EMXMZ548DADucted, 3.5–4.5 tonsbeats 51% · 16.4EZMB10L9A1S95AADucted, up to 1.5 tons
EER2beats 99% · 18.0EMXSZ106DANon-ducted, up to 1.5 tonsbeats 31% · 11.1EZVV12L8*Also listed as EZVV09L2, EZVV09L8, EZVV15L2, EZVV15L8Ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 97% · 19,000 Btu/hEMXMZ218DANon-ducted, up to 1.5 tonsbeats 58% · 11,100 Btu/hEZVV18L8*Also listed as EZVV24L3, EZVV24L8Ducted, up to 1.5 tons

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