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Clima Smart vs ULTRA MAXI AIR heat pumps

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

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingClima SmartULTRA MAXI AIR
Efficiency index61% (higher)median —31% (higher)median —
COP at 5°F81% (higher)median 2.1935% (higher)median 1.80
Capacity retention at 5°F50% (higher)median 72%7% (higher)median 45%
HSPF247% (higher)median 9.038% (higher)median 8.9
SEER262% (higher)median 22.042% (higher)median 21.1
EER264% (higher)median 12.826% (higher)median 10.7
Heating capacity at 5°F51% (higher)median 10,885 Btu/h19% (higher)median 5,400 Btu/h
Outdoor models44
AHRI certifications44

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardClima SmartULTRA MAXI AIR
CEE 2025 Tier 1 (Split ASHP)100%4 models25%1 models
CEE 2026 Tier 1 (Split ASHP)100%4 models0%0 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)75%3 models0%0 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate0%0 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
  • Clima Smart
  • ULTRA MAXI AIR
  • All models of the group
Non-ducted, up to 1.5 tons1.902,417 modelsNon-ducted, 2 tons1.87611 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 SmartULTRA MAXI AIR
Non-ducted, up to 1.5 tons3 · index 64%4 · index 31%
Non-ducted, 2 tons1 · index 53%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 modelULTRA MAXI AIRCold-climate score, best model
Non-ducted, up to 1.5 tons68.8(50 is the typical model of its size class)MCH12-CS-S23-230V-Owith ductless indoor unit MCH12-CS-S23-230V-I3 of 3 models qualify · AHRI 213148996None on this board (0 of 4 models qualify)
Non-ducted, 2 tonsNone on this board (0 of 1 models qualify)No 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 modelULTRA MAXI AIRAll-around score, best model
Non-ducted, up to 1.5 tons70.8(50 is the typical model of its size class) (higher)MCH12-CS-S23-230V-Owith ductless indoor unit MCH12-CS-S23-230V-I3 of 3 models have all five ratings · AHRI 21314899634.6(50 is the typical model of its size class)LSAB-18HRDN1with ductless indoor unit LSAB-18HRDN14 of 4 models have all five ratings · AHRI 205725746
Non-ducted, 2 tons53.0(50 is the typical model of its size class)MCH24-CS-S23-Owith ductless indoor unit MCH24-CS-S23-I1 of 1 models have all five ratings · AHRI 211257106No 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 SmartULTRA MAXI AIR
COP at 5°Fbeats 89% · 2.21MCH18-CS-S23-ONon-ducted, up to 1.5 tonsbeats 86% · 2.18LSAB-18HRDN1Non-ducted, up to 1.5 tons
Capacity retention at 5°Fbeats 61% · 76%MCH12-CS-S23-230V-ONon-ducted, up to 1.5 tonsbeats 21% · 64%LSAB-18HRDN1Non-ducted, up to 1.5 tons
HSPF2beats 57% · 9.5MCH12-CS-S23-230V-ONon-ducted, up to 1.5 tonsbeats 46% · 9.1LSAB-12HRDN1Also listed as NE-T52-ULTRA12ENon-ducted, up to 1.5 tons
SEER2beats 73% · 23.0MCH12-CS-S23-230V-ONon-ducted, up to 1.5 tonsbeats 49% · 21.4LSAB-12HRDN1Also listed as NE-T52-ULTRA12ENon-ducted, up to 1.5 tons
EER2beats 68% · 13.0MCH18-CS-S23-ONon-ducted, up to 1.5 tonsbeats 29% · 10.8LSAB-12HRDN1Also listed as NE-T52-ULTRA12ENon-ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 73% · 12,600 Btu/hMCH18-CS-S23-ONon-ducted, up to 1.5 tonsbeats 71% · 12,050 Btu/hLSAB-18HRDN1Non-ducted, up to 1.5 tons

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