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Classic America vs THERMOFLUX heat pumps

Measured against models of the same size and duct type, THERMOFLUX scores higher on 4 of the 6 ratings. Classic America has 9 outdoor models, THERMOFLUX has 9 outdoor models. Classic America and THERMOFLUX 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.
Classic America and THERMOFLUX 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, THERMOFLUX scores higher on 4 of the 6 ratings.
  • Classic America
  • THERMOFLUX
  • Other ranked manufacturers
Classic …THERMOFL…

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingClassic AmericaTHERMOFLUX
Efficiency index32%median —43%median —
COP at 5°F33% (higher)median 1.9025% (higher)median 1.80
Capacity retention at 5°F22%median 70%66%median 75%
HSPF243%median 9.561%median 8.1
SEER238%median 17.050%median 15.2
EER227% (higher)median 9.522% (higher)median 10.0
Heating capacity at 5°F28%median 16,000 Btu/h67%median 36,000 Btu/h
Outdoor models99
AHRI certifications99

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardClassic AmericaTHERMOFLUX
CEE 2025 Tier 1 (Split ASHP)44.4%4 models44.4%4 models
CEE 2026 Tier 1 (Split ASHP)44.4%4 models44.4%4 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)44.4%4 models44.4%4 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate44.4%4 models44.4%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 · 0 groups where both have models
  • Classic America
  • THERMOFLUX
  • 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 typeClassic AmericaTHERMOFLUX
Ducted, 2 tonsNone2 · index 47%
Ducted, 2.5–3 tonsNone3 · index 37%
Ducted, 3.5–4.5 tonsNone4 · index 46%
Non-ducted, up to 1.5 tons4 · index 28%None
Non-ducted, 2 tons1 · index 13%None
Non-ducted, 2.5–3 tons3 · index 41%None
Non-ducted, 3.5–4.5 tons1 · index 42%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 typeClassic AmericaCold-climate score, best modelTHERMOFLUXCold-climate score, best model
Ducted, 2 tonsNo models in this size class68.9(50 is the typical model of its size class)TMFS24HDI2NAJ0H26with ducted air handler TMFS24IDI2NAJ0H261 of 2 models qualify · AHRI 218787998
Ducted, 2.5–3 tonsNo models in this size class64.5(50 is the typical model of its size class)TMFS36HDI2NAJ0H26with ducted air handler TMFS36IDI2NAJ0H261 of 3 models qualify · AHRI 218787999
Ducted, 3.5–4.5 tonsNo models in this size class69.4(50 is the typical model of its size class)TMFS48HDI2NAJ0H26with ducted air handler TMFS48IDI2NAJ0H264 of 4 models qualify · AHRI 218788000
Non-ducted, up to 1.5 tons68.6(50 is the typical model of its size class)MZR454-18CHA2-O1 of 4 models qualify · AHRI 217734698No models in this size class
Non-ducted, 2 tonsNone on this board (0 of 1 models qualify)No models in this size class
Non-ducted, 2.5–3 tons57.5(50 is the typical model of its size class)MZR454-27CHA2-O2 of 3 models qualify · AHRI 217734699No models in this size class
Non-ducted, 3.5–4.5 tons31.2(50 is the typical model of its size class)MZR454-42CHA2-O1 of 1 models qualify · AHRI 217734701No 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 typeClassic AmericaAll-around score, best modelTHERMOFLUXAll-around score, best model
Ducted, 2 tonsNo models in this size class70.0(50 is the typical model of its size class)TMFS24HDI2NAJ0H26with ducted air handler TMFS24IDI2NAJ0H262 of 2 models have all five ratings · AHRI 218787998
Ducted, 2.5–3 tonsNo models in this size class57.9(50 is the typical model of its size class)TMFS36HDI2NAJ0H26with ducted air handler TMFS36IDI2NAJ0H263 of 3 models have all five ratings · AHRI 218787999
Ducted, 3.5–4.5 tonsNo models in this size class65.0(50 is the typical model of its size class)TMFS48HDI2NAJ0H26with ducted air handler TMFS48IDI2NAJ0H264 of 4 models have all five ratings · AHRI 218788000
Non-ducted, up to 1.5 tons72.2(50 is the typical model of its size class)MZR454-18CHA2-O4 of 4 models have all five ratings · AHRI 217734698No models in this size class
Non-ducted, 2 tons13.4(50 is the typical model of its size class)MSCR32-23CHSA2-Owith ductless indoor unit MSCR32-23CHSA2-I1 of 1 models have all five ratings · AHRI 217734533No models in this size class
Non-ducted, 2.5–3 tons65.1(50 is the typical model of its size class)MZR454-27CHA2-O3 of 3 models have all five ratings · AHRI 217734699No models in this size class
Non-ducted, 3.5–4.5 tons42.4(50 is the typical model of its size class)MZR454-42CHA2-O1 of 1 models have all five ratings · AHRI 217734701No 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
RatingClassic AmericaTHERMOFLUX
COP at 5°Fbeats 63% · 2.00MZR454-18CHA2-ONon-ducted, up to 1.5 tonsbeats 32% · 1.85TMFS48HDI2NAJ0H26Ducted, 3.5–4.5 tons
Capacity retention at 5°Fbeats 61% · 80%MZR454-18CHA2-ONon-ducted, up to 1.5 tonsbeats 94% · 100%TMFS48HDI2NAJ0H26Ducted, 3.5–4.5 tons
HSPF2beats 80% · 10.5MZR454-27CHA2-ONon-ducted, 2.5–3 tonsbeats 81% · 10.0TMFS24HDI2NAJ0H26Ducted, 2 tons
SEER2beats 91% · 24.0MZR454-27CHA2-ONon-ducted, 2.5–3 tonsbeats 76% · 18.0TMFS48HDI2NAJ0H26Ducted, 3.5–4.5 tons
EER2beats 70% · 13.0MZR454-18CHA2-ONon-ducted, up to 1.5 tonsbeats 60% · 12.0TMFS24HDI2NAJ0H26Ducted, 2 tons
Heating capacity at 5°Fbeats 88% · 16,000 Btu/hMZR454-18CHA2-ONon-ducted, up to 1.5 tonsbeats 91% · 50,000 Btu/hTMFS55HDI2NAJ0H26Ducted, 3.5–4.5 tons

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