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ARMSCO heat pump efficiency: 7 outdoor models compared

ARMSCO has 7 heat pump outdoor models certified with this refrigerant group, in 7 AHRI-certified combinations. Each model is compared with models of the same size and duct type, so the scores below do not depend on which sizes ARMSCO makes. ARMSCO has no QMID (IRS Qualified Manufacturer ID) on file, so it is not ranked against other manufacturers.

New to heat pump ratings? The Simple view explains them in plain words →

ManufacturerData as of updated · sources

Outdoor models
7
AHRI certifications
7
Efficiency index
22%
Typical model vs same-size, same-type peers (7 models)
Meet CEE 2025
71.4%
5 models

How ARMSCO compares with comparable models

For each rating: the share of same-size, same-type models that a typical model of this manufacturer beats (50% is typical), its rank, and the raw median for context. Raw medians are not comparable across manufacturers that make different sizes.
ARMSCO against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of ARMSCO’s own modelsARMSCO is strongest on heating capacity at 5°F (its typical model beats 32% of comparable models) and weakest on EER2 (16%).
  • ARMSCO
  • Middle half of its models
  • Other ranked manufacturers
ARMSCO

Source: AHRI Directory, NEEP · as of

Average peer percentile of ARMSCO’s models
RatingBeats comparable modelsRankRaw median
Efficiency index7 models scored22%Not ranked—
COP at 5°F7 models scored19%Not ranked1.80
Capacity retention at 5°F7 models scored30%Not ranked70%
HSPF27 models scored19%Not ranked8.5
SEER27 models scored27%Not ranked19.0
EER27 models scored16%Not ranked10.0
Heating capacity at 5°F7 models scored32%Not ranked8,600 Btu/h

Standards met

Share of ARMSCO’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)71.4%5
CEE 2026 Tier 1 (Split ASHP)57.1%4
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)57.1%4
DOE Cold Climate Heat Pump Challenge0%0
ENERGY STAR Cold Climate0%0

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
ARMSCO’s models inside each size and duct typeShape: every model of the group · blue: the middle half of this manufacturer’s models there, median dot, 10th–90th percentile line
  • ARMSCO (median, middle 50%, 10th–90th)
  • All models of the group
Non-ducted, up to 1.5 tons1.902,417 modelsNon-ducted, 2 tons1.87611 modelsNon-ducted, 2.5–3 tons1.85975 modelsmedian

Source: AHRI Directory · as of

Share of comparable models beaten, per peer group
Size and duct typeModelsIndexCOP@5°FHSPF2SEER2
Non-ducted, up to 1.5 tons521%19%16%23%
Non-ducted, 2 tons125%26%22%37%
Non-ducted, 2.5–3 tons123%15%26%36%

Every ARMSCO model in the market

ARMSCO’s 7 models with a known size and duct type, over the shape of the whole catalog.
ARMSCO models by size and ratingColoured: ARMSCO · grey shapes: all 11,475 models · lines: catalog medians by size
  • ARMSCO models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 7 armsco models, each through its representative certification, in the colour of the rating shown. The grey shapes count all 11,475 models, half a ton at a time.
Show the data as a table
COP at 5°F by size and duct type (every model, by rated cooling capacity)
Duct type, sizeModels10th pct.25thMedian75th90th
Ducted, 0.5 tons1751.701.851.902.102.26
Ducted, 1 ton3401.851.902.002.402.65
Ducted, 1.5 tons7891.751.852.002.202.55
Ducted, 2 tons7821.731.802.002.102.33
Ducted, 2.5 tons7351.711.801.902.092.48
Ducted, 3 tons6521.681.701.902.062.36
Ducted, 3.5 tons6411.611.801.952.202.50
Ducted, 4 tons3671.701.801.912.022.52
Ducted, 4.5 tons5441.701.801.912.082.34
Ducted, 5 tons251.801.801.901.902.15
Non-ducted, 0.5 tons7171.751.811.972.102.19
Non-ducted, 1 ton1,0641.751.801.902.072.25
Non-ducted, 1.5 tons8861.801.801.872.072.21
Non-ducted, 2 tons5641.801.801.832.042.21
Non-ducted, 2.5 tons2751.801.811.841.862.03
Non-ducted, 3 tons5021.801.801.902.002.09
Non-ducted, 3.5 tons701.821.831.902.002.28
Non-ducted, 4 tons2631.801.801.982.002.10
Non-ducted, 4.5 tons1031.771.771.801.972.02
Non-ducted, 5 tons291.982.002.102.302.47

Source: AHRI Directory · as of

Top ARMSCO models

Its top five cold-climate picks and its top five all-around models across sizes (both scores compare each model with models of its own size and duct type, so sizes compare), then, on each single rating, the model that beats the largest share of comparable models.

Cold-climate picks

Top 3 ARMSCO cold-climate picks across sizes. 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.
# · Outdoor modelSize · typeCap. 5/47COP@5°FHSPF2Btu/h @5°FSEER2MeetsCombosAHRI ref.Compared withScore
1ACMS122419AAARMSCOwith ductless indoor unit ACMS122419AAAlso listed as ACMS122420AB1 ton12,000 Btu/h · Non-ducted70%1.808.58,60019.0CEE 25CEE 26Xcel1213829858Non-ducted, up to 1.5 tons28.4
2ACMS122419ABARMSCOwith ductless indoor unit ACMS122419AB1 ton9,000 Btu/h · Non-ducted70%1.808.57,00019.0CEE 25CEE 26Xcel1213829859Non-ducted, up to 1.5 tons26.2
3ACMS092419AAARMSCOwith ductless indoor unit ACMS092419AA1 ton9,000 Btu/h · Non-ducted70%1.758.57,00019.0CEE 25CEE 26Xcel1213829857Non-ducted, up to 1.5 tons20.8

All-around best

Top 5 ARMSCO models on the all-around score across sizes. 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.
# · Outdoor modelSize · typeCap. 5/47COP@5°FHSPF2SEER2EER2MeetsCombosAHRI ref.Compared withScoreHeating halfCooling halfCold-climate score
1ACMS242420ABARMSCOwith ductless indoor unit ACMS242420AB2 tons24,000 Btu/h · Non-ducted61%1.808.519.010.0CEE 251213829862Non-ducted, 2 tons24.819.130.5Not a pick
2ACMS122419AAARMSCOwith ductless indoor unit ACMS122419AAAlso listed as ACMS122420AB1 ton12,000 Btu/h · Non-ducted70%1.808.519.010.0CEE 25CEE 26Xcel1213829858Non-ducted, up to 1.5 tons23.628.418.928.4
3ACMS362420ABARMSCOwith ductless indoor unit ACMS362420AB3 tons36,000 Btu/h · Non-ducted58%1.808.519.09.0None1213829863Non-ducted, 2.5–3 tons23.417.928.8Not a pick
4ACMS122419ABARMSCOwith ductless indoor unit ACMS122419AB1 ton9,000 Btu/h · Non-ducted70%1.808.519.010.0CEE 25CEE 26Xcel1213829859Non-ducted, up to 1.5 tons22.526.218.926.2
5ACMS092419AAARMSCOwith ductless indoor unit ACMS092419AA1 ton9,000 Btu/h · Non-ducted70%1.758.519.010.0CEE 25CEE 26Xcel1213829857Non-ducted, up to 1.5 tons19.920.818.920.8

Best model on each rating

ARMSCO’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FACMS242420AB1.80Non-ducted, 2 tons26%213829862
Capacity retention at 5°FACMS122419AAAlso listed as ACMS122420AB70%Non-ducted, up to 1.5 tons46%213829858
HSPF2ACMS362420AB8.5Non-ducted, 2.5–3 tons25%213829863
SEER2ACMS362420AB19.0Non-ducted, 2.5–3 tons35%213829863
EER2ACMS242420AB10.0Non-ducted, 2 tons25%213829862
Heating capacity at 5°FACMS182420AB11,600 Btu/hNon-ducted, up to 1.5 tons61%213829861

All 7 ARMSCO models in Explore

ARMSCO size class by size class: cold-climate and all-around

Its best model on each board in every size and duct type it makes. Both scores are 0–100 against every model of that size class (the line on each bar is 50, the typical model there). Cold-climate picks must keep at least 70% of their heat at 5°F; the all-around score needs all five ratings and has no such bar.
ARMSCO: best cold-climate pick and best all-around model per size and duct type, with how many of its models are on each board (top 5 and 5 per class are in the snapshot)
Size and duct typeCold-climate pickCold-climate score, best modelAll-around bestAll-around score, best model
Non-ducted, up to 1.5 tons28.4(50 is the typical model of its size class)ACMS122419AAwith ductless indoor unit ACMS122419AAAlso listed as ACMS122420AB4 of 5 models qualify · AHRI 21382985823.6(50 is the typical model of its size class)ACMS122419AAwith ductless indoor unit ACMS122419AAAlso listed as ACMS122420AB5 of 5 models have all five ratings · AHRI 213829858
Non-ducted, 2 tonsNone on this board (0 of 1 models qualify)24.8(50 is the typical model of its size class)ACMS242420ABwith ductless indoor unit ACMS242420AB1 of 1 models have all five ratings · AHRI 213829862
Non-ducted, 2.5–3 tonsNone on this board (0 of 1 models qualify)23.4(50 is the typical model of its size class)ACMS362420ABwith ductless indoor unit ACMS362420AB1 of 1 models have all five ratings · AHRI 213829863

All-around board, every manufacturer

Newest ARMSCO certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified ARMSCO outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
ACMS362420ABARMSCOwith ductless indoor unit ACMS362420AB3 tons36,000 Btu/h · Non-ducted1.8058%8.519.0None1213829863
ACMS242420ABARMSCOwith ductless indoor unit ACMS242420AB2 tons24,000 Btu/h · Non-ducted1.8061%8.519.0CEE 251213829862
ACMS182420ABARMSCOwith ductless indoor unit ACMS182420AB1.5 tons18,000 Btu/h · Non-ducted1.8059%8.519.0None1213829861
ACMS122420ABARMSCOwith ductless indoor unit ACMS122420AB1 ton12,000 Btu/h · Non-ducted1.8070%8.519.0CEE 25CEE 26Xcel1213829860
ACMS122419ABARMSCOwith ductless indoor unit ACMS122419AB1 ton9,000 Btu/h · Non-ducted1.8070%8.519.0CEE 25CEE 26Xcel1213829859

Shares hardware with

Manufacturers whose models are the same equipment under another badge. About OEM families

No shared hardware found for ARMSCO in this group.

Compare ARMSCO

Manufacturers of a similar size, side by side.

Compare with any manufacturer

ARMSCO includes these brand names as listed in AHRI: ARMSCO. Standards are checked against published thresholds; program rules beyond ratings are not checked.