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Clima Smart vs Voltas heat pumps

Measured against models of the same size and duct type, Clima Smart scores higher on 5 of the 6 ratings. Clima Smart has 8 outdoor models, Voltas has 8 outdoor models. Clima Smart and Voltas 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 Voltas 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 5 of the 6 ratings.
  • Clima Smart
  • Voltas
  • Other ranked manufacturers
Clima Sm…Voltas

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingClima SmartVoltas
Efficiency index73% (higher)median —55% (higher)median —
COP at 5°F35%median 1.9082%median 2.39
Capacity retention at 5°F79% (higher)median 98%47% (higher)median 74%
HSPF268% (higher)median 10.044% (higher)median 9.0
SEER289% (higher)median 25.053% (higher)median 19.3
EER280% (higher)median 13.851% (higher)median 11.6
Heating capacity at 5°F71% (higher)median 21,100 Btu/h48% (higher)median 17,600 Btu/h
Outdoor models88
AHRI certifications1020

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardClima SmartVoltas
CEE 2025 Tier 1 (Split ASHP)100%8 models100%8 models
CEE 2026 Tier 1 (Split ASHP)100%8 models100%8 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)100%8 models75%6 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate100%8 models50%4 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 · 2 groups where both have models
  • Clima Smart
  • Voltas
  • 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 modelsDucted, 5 tons and up2.00321 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 SmartVoltas
Ducted, 2 tonsNone1 · index 47%
Ducted, 2.5–3 tonsNone1 · index 66%
Ducted, 3.5–4.5 tonsNone1 · index 82%
Ducted, 5 tons and upNone1 · index 81%
Non-ducted, up to 1.5 tons4 · index 74%3 · index 43%
Non-ducted, 2 tons1 · index 56%1 · index 34%
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 modelVoltasCold-climate score, best model
Ducted, 2 tonsNo models in this size class82.1(50 is the typical model of its size class)VAUWR-24HCDR2with ducted air handler VAUH-24HCDR21 of 1 models qualify · AHRI 217269206
Ducted, 2.5–3 tonsNo models in this size class87.9(50 is the typical model of its size class)VAUWR-36HCDR2with ducted air handler VAUH-36HCDR21 of 1 models qualify · AHRI 217269207
Ducted, 3.5–4.5 tonsNo models in this size class77.3(50 is the typical model of its size class)VAUWR-48HCDR2with ducted air handler VAUH-48HCDR21 of 1 models qualify · AHRI 217269208
Ducted, 5 tons and upNo models in this size class88.7(50 is the typical model of its size class)VAUWR-60HCDR2with ducted air handler VAUH-60HCDR21 of 1 models qualify · AHRI 217269209
Non-ducted, up to 1.5 tons70.9(50 is the typical model of its size class) (higher)MU-CSU18HEI2NAM0T24-3PO4 of 4 models qualify · AHRI 21804480769.1(50 is the typical model of its size class)CU-VST18HC-WIFIDR25with ductless indoor unit EU-VST18HC-WIFIDR251 of 3 models qualify · AHRI 217269475
Non-ducted, 2 tons58.0(50 is the typical model of its size class) (higher)CSU24HEI2NAK0T24with ductless indoor unit CSU24HEI2NAK0T241 of 1 models qualify · AHRI 21804376138.8(50 is the typical model of its size class)CU-VST24HC-WIFIDR25with ductless indoor unit EU- VST24HC-WIFIDR251 of 1 models qualify · AHRI 218457908
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 modelVoltasAll-around score, best model
Ducted, 2 tonsNo models in this size class79.5(50 is the typical model of its size class)VAUWR-24HCDR2with ducted air handler VAUH-24HCDR21 of 1 models have all five ratings · AHRI 217269206
Ducted, 2.5–3 tonsNo models in this size class82.3(50 is the typical model of its size class)VAUWR-36HCDR2with ducted air handler VAUH-36HCDR21 of 1 models have all five ratings · AHRI 217269207
Ducted, 3.5–4.5 tonsNo models in this size class82.3(50 is the typical model of its size class)VAUWR-48HCDR2with ducted air handler VAUH-48HCDR21 of 1 models have all five ratings · AHRI 217269208
Ducted, 5 tons and upNo models in this size class81.1(50 is the typical model of its size class)VAUWR-60HCDR2with ducted air handler VAUH-60HCDR21 of 1 models have all five ratings · AHRI 217269209
Non-ducted, up to 1.5 tons82.6(50 is the typical model of its size class) (higher)MU-CSU18HEI2NAM0T24-3PO4 of 4 models have all five ratings · AHRI 21804480756.7(50 is the typical model of its size class)CU-VST09HC-WIFIDR25with ductless indoor unit EU-VST09HC-WIFIDR253 of 3 models have all five ratings · AHRI 217269474
Non-ducted, 2 tons56.1(50 is the typical model of its size class) (higher)CSU24HEI2NAK0T24with ductless indoor unit CSU24HEI2NAK0T241 of 1 models have all five ratings · AHRI 21804376134.1(50 is the typical model of its size class)CU-VST24HC-WIFIDR25with ductless indoor unit EU- VST24HC-WIFIDR251 of 1 models have all five ratings · AHRI 218457908
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 SmartVoltas
COP at 5°Fbeats 63% · 2.00MU-CSU18HEI2NAM0T24-3PONon-ducted, up to 1.5 tonsbeats 100% · 2.53CU-VST18HC-WIFIDR25Non-ducted, up to 1.5 tons
Capacity retention at 5°Fbeats 90% · 101%CSU09HEI2NAM0T24Non-ducted, up to 1.5 tonsbeats 94% · 75%VAUWR-60HCDR2Ducted, 5 tons and up
HSPF2beats 80% · 10.5MU-CSU27HEI2NAM0T24-4PONon-ducted, 2.5–3 tonsbeats 96% · 10.5VAUWR-36HCDR2Ducted, 2.5–3 tons
SEER2beats 99% · 26.5MU-CSU27HEI2NAM0T24-4PONon-ducted, 2.5–3 tonsbeats 95% · 19.0VAUWR-60HCDR2Ducted, 5 tons and up
EER2beats 97% · 14.0MU-CSU27HEI2NAM0T24-4PONon-ducted, 2.5–3 tonsbeats 90% · 12.1VAUWR-48HCDR2Ducted, 3.5–4.5 tons
Heating capacity at 5°Fbeats 98% · 19,800 Btu/hMU-CSU18HEI2NAM0T24-3PONon-ducted, up to 1.5 tonsbeats 90% · 42,500 Btu/hVAUWR-60HCDR2Ducted, 5 tons and up

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