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Clima Smart vs YISO heat pumps

Measured against models of the same size and duct type, Clima Smart scores higher on 4 of the 6 ratings. Clima Smart has 8 outdoor models, YISO has 7 outdoor models. Clima Smart and YISO 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.
Clima Smart and YISO 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, Clima Smart scores higher on 4 of the 6 ratings.
  • Clima Smart
  • YISO
  • Other ranked manufacturers
Clima Sm…YISO

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingClima SmartYISO
Efficiency index73% (higher)median —66% (higher)median —
COP at 5°F35%median 1.9050%median 2.00
Capacity retention at 5°F79% (higher)median 98%52% (higher)median 71%
HSPF268%median 10.075%median 9.3
SEER289% (higher)median 25.080% (higher)median 19.0
EER280% (higher)median 13.864% (higher)median 11.2
Heating capacity at 5°F71% (higher)median 21,100 Btu/h55% (higher)median 33,600 Btu/h
Outdoor models87
AHRI certifications10170

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardClima SmartYISO
CEE 2025 Tier 1 (Split ASHP)100%8 models100%7 models
CEE 2026 Tier 1 (Split ASHP)100%8 models100%7 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)100%8 models100%7 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate100%8 models100%7 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 · 0 groups where both have models
  • Clima Smart
  • YISO
  • All models of the group
Ducted, 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 typeClima SmartYISO
Ducted, 2 tonsNone2 · index 69%
Ducted, 2.5–3 tonsNone1 · index 54%
Ducted, 3.5–4.5 tonsNone4 · index 66%
Non-ducted, up to 1.5 tons4 · index 74%None
Non-ducted, 2 tons1 · index 56%None
Non-ducted, 2.5–3 tons2 · index 80%None
Non-ducted, 3.5–4.5 tons1 · index 70%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 typeClima SmartCold-climate score, best modelYISOCold-climate score, best model
Ducted, 2 tonsNo models in this size class71.1(50 is the typical model of its size class)YOHA2-36CBwith ducted air handler YAHA2-24CB1 of 1 models qualify · AHRI 216445235
Ducted, 2.5–3 tonsNo models in this size class69.4(50 is the typical model of its size class)YOHA2-60CBwith ducted air handler YAHA2-36CB4 of 4 models qualify · AHRI 216620320
Ducted, 3.5–4.5 tonsNo models in this size class56.7(50 is the typical model of its size class)YRHA1-60AB2 of 2 models qualify · AHRI 217463589
Non-ducted, up to 1.5 tons70.9(50 is the typical model of its size class)MU-CSU18HEI2NAM0T24-3PO4 of 4 models qualify · AHRI 218044807No models in this size class
Non-ducted, 2 tons58.0(50 is the typical model of its size class)CSU24HEI2NAK0T24with ductless indoor unit CSU24HEI2NAK0T241 of 1 models qualify · AHRI 218043761No models in this size class
Non-ducted, 2.5–3 tons68.0(50 is the typical model of its size class)MU-CSU27HEI2NAM0T24-4PO2 of 2 models qualify · AHRI 218044808No models in this size class
Non-ducted, 3.5–4.5 tons48.1(50 is the typical model of its size class)MU-CSU48HEI2NAM0T24-6PO1 of 1 models qualify · AHRI 218044810No 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 typeClima SmartAll-around score, best modelYISOAll-around score, best model
Ducted, 2 tonsNo models in this size class80.8(50 is the typical model of its size class)YOHA2-36CBwith ducted air handler YAHA2-24CB2 of 2 models have all five ratings · AHRI 216445235
Ducted, 2.5–3 tonsNo models in this size class79.0(50 is the typical model of its size class)YOHA2-60CBwith ducted air handler YAHA2-36CB2 of 2 models have all five ratings · AHRI 216620320
Ducted, 3.5–4.5 tonsNo models in this size class63.7(50 is the typical model of its size class)YRHA1-60AB3 of 3 models have all five ratings · AHRI 217463589
Non-ducted, up to 1.5 tons82.6(50 is the typical model of its size class)MU-CSU18HEI2NAM0T24-3PO4 of 4 models have all five ratings · AHRI 218044807No models in this size class
Non-ducted, 2 tons56.1(50 is the typical model of its size class)CSU24HEI2NAK0T24with ductless indoor unit CSU24HEI2NAK0T241 of 1 models have all five ratings · AHRI 218043761No models in this size class
Non-ducted, 2.5–3 tons83.1(50 is the typical model of its size class)MU-CSU27HEI2NAM0T24-4PO2 of 2 models have all five ratings · AHRI 218044808No models in this size class
Non-ducted, 3.5–4.5 tons70.2(50 is the typical model of its size class)MU-CSU48HEI2NAM0T24-6PO1 of 1 models have all five ratings · AHRI 218044810No 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
RatingClima SmartYISO
COP at 5°Fbeats 63% · 2.00MU-CSU18HEI2NAM0T24-3PONon-ducted, up to 1.5 tonsbeats 69% · 2.10YOHA2-60CBDucted, 3.5–4.5 tons
Capacity retention at 5°Fbeats 90% · 101%CSU09HEI2NAM0T24Non-ducted, up to 1.5 tonsbeats 85% · 100%YOHA2-60CBDucted, 2.5–3 tons
HSPF2beats 80% · 10.5MU-CSU27HEI2NAM0T24-4PONon-ducted, 2.5–3 tonsbeats 86% · 10.0YOHA2-60CBDucted, 3.5–4.5 tons
SEER2beats 99% · 26.5MU-CSU27HEI2NAM0T24-4PONon-ducted, 2.5–3 tonsbeats 87% · 20.0YOHA2-36CBDucted, 2 tons
EER2beats 97% · 14.0MU-CSU27HEI2NAM0T24-4PONon-ducted, 2.5–3 tonsbeats 90% · 12.5YOHA2-60CBDucted, 2.5–3 tons
Heating capacity at 5°Fbeats 98% · 19,800 Btu/hMU-CSU18HEI2NAM0T24-3PONon-ducted, up to 1.5 tonsbeats 65% · 39,500 Btu/hYRHA1-60ABDucted, 3.5–4.5 tons

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