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Gridless heat pump efficiency: 11 outdoor models compared

Gridless has 11 heat pump outdoor models certified with this refrigerant group, in 11 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 Gridless makes. Gridless 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
11
AHRI certifications
11
Efficiency index
60%
Typical model vs same-size, same-type peers (11 models)
Meet CEE 2025
100%
11 models

How Gridless 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.
Gridless against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Gridless’s own modelsGridless is strongest on capacity retention at 5°F (its typical model beats 77% of comparable models) and weakest on COP at 5°F (40%).
  • Gridless
  • Middle half of its models
  • Other ranked manufacturers
Gridless

Source: AHRI Directory, NEEP · as of

Average peer percentile of Gridless’s models
RatingBeats comparable modelsRankRaw median
Efficiency index11 models scored60%Not ranked—
COP at 5°F11 models scored40%Not ranked1.84
Capacity retention at 5°F11 models scored77%Not ranked86%
HSPF211 models scored60%Not ranked9.5
SEER211 models scored68%Not ranked21.0
EER211 models scored56%Not ranked12.5
Heating capacity at 5°F11 models scored67%Not ranked22,800 Btu/h

Standards met

Share of Gridless’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)100%11
CEE 2026 Tier 1 (Split ASHP)100%11
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)100%11
DOE Cold Climate Heat Pump Challenge0%0
ENERGY STAR Cold Climate90.9%10

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
Gridless’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
  • Gridless (median, middle 50%, 10th–90th)
  • All models of the group
Ducted, 2 tons2.00821 modelsDucted, 2.5–3 tons1.901,614 modelsDucted, 3.5–4.5 tons1.911,492 modelsNon-ducted, up to 1.5 tons1.902,417 modelsNon-ducted, 2 tons1.87611 modelsNon-ducted, 2.5–3 tons1.85975 modelsNon-ducted, 3.5–4.5 tons1.97438 modelsmedian

Source: AHRI Directory · as of

Share of comparable models beaten, per peer group
Size and duct typeModelsIndexCOP@5°FHSPF2SEER2
Ducted, 2 tons146%50%68%58%
Ducted, 2.5–3 tons163%75%84%78%
Ducted, 3.5–4.5 tons157%41%64%83%
Non-ducted, up to 1.5 tons463%37%64%64%
Non-ducted, 2 tons264%18%65%80%
Non-ducted, 2.5–3 tons170%45%48%65%
Non-ducted, 3.5–4.5 tons145%41%14%45%

Every Gridless model in the market

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

Dots: 11 gridless 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 Gridless 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 5 Gridless 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
1O-AYC36SD-1Gridless · Gridless HDwith ducted air handler I-AYC36VAH-13 tons34,000 Btu/h · Ducted76%2.059.526,00018.0CEE 25CEE 26Xcel1213249674Ducted, 2.5–3 tons75.1
2O-AYD09SD-1Gridless · Gridless HDwith ductless indoor unit I-AYD09W-11 ton9,000 Btu/h · Non-ducted96%1.9410.58,60025.5CEE 25CEE 26XcelES CC1213265552Non-ducted, up to 1.5 tons72.9
3O-AYD36SD-4Gridless · Gridless HD2.5 tons32,000 Btu/h · Non-ducted113%1.849.036,00021.0CEE 25CEE 26XcelES CC1213255585Non-ducted, 2.5–3 tons64.0
4O-AYD12SD-1Gridless · Gridless HDwith ductless indoor unit I-AYD12W-11 ton12,000 Btu/h · Non-ducted83%1.899.510,00023.5CEE 25CEE 26XcelES CC1213265553Non-ducted, up to 1.5 tons58.2
5O-AYC24SD-1Gridless · Gridless HDwith ducted air handler I-AYC24VAH-12 tons22,000 Btu/h · Ducted77%2.009.016,90016.5CEE 25CEE 26XcelES CC1213249673Ducted, 2 tons57.5

All-around best

Top 5 Gridless 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
1O-AYD09SD-1Gridless · Gridless HDwith ductless indoor unit I-AYD09W-11 ton9,000 Btu/h · Non-ducted96%1.9410.525.514.5CEE 25CEE 26XcelES CC1213265552Non-ducted, up to 1.5 tons81.472.989.972.9
2O-AYD36SD-4Gridless · Gridless HD2.5 tons32,000 Btu/h · Non-ducted113%1.849.021.012.5CEE 25CEE 26XcelES CC1213255585Non-ducted, 2.5–3 tons69.564.075.064.0
3O-AYD24SD-3Gridless · Gridless HD2 tons24,000 Btu/h · Non-ducted100%1.809.122.012.5CEE 25CEE 26XcelES CC1213255584Non-ducted, 2 tons67.556.878.256.8
4O-AYD12SD-1Gridless · Gridless HDwith ductless indoor unit I-AYD12W-11 ton12,000 Btu/h · Non-ducted83%1.899.523.512.7CEE 25CEE 26XcelES CC1213265553Non-ducted, up to 1.5 tons65.058.271.758.2
5O-AYC36SD-1Gridless · Gridless HDwith ducted air handler I-AYC36VAH-13 tons34,000 Btu/h · Ducted76%2.059.518.010.1CEE 25CEE 26Xcel1213249674Ducted, 2.5–3 tons63.275.151.375.1

Best model on each rating

Gridless’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FO-AYC36SD-12.05Ducted, 2.5–3 tons75%213249674
Capacity retention at 5°FO-AYD36SD-4113%Non-ducted, 2.5–3 tons99%213255585
HSPF2O-AYC36SD-19.5Ducted, 2.5–3 tons83%213249674
SEER2O-AYD09SD-125.5Non-ducted, up to 1.5 tons89%213265552
EER2O-AYD09SD-114.5Non-ducted, up to 1.5 tons89%213265552
Heating capacity at 5°FO-AYD18SD-218,000 Btu/hNon-ducted, up to 1.5 tons92%213255583

All 11 Gridless models in Explore

Gridless 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.
Gridless: 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
Ducted, 2 tons57.5(50 is the typical model of its size class)O-AYC24SD-1with ducted air handler I-AYC24VAH-11 of 1 models qualify · AHRI 21324967346.3(50 is the typical model of its size class)O-AYC24SD-1with ducted air handler I-AYC24VAH-11 of 1 models have all five ratings · AHRI 213249673
Ducted, 2.5–3 tons75.1(50 is the typical model of its size class)O-AYC36SD-1with ducted air handler I-AYC36VAH-11 of 1 models qualify · AHRI 21324967463.2(50 is the typical model of its size class)O-AYC36SD-1with ducted air handler I-AYC36VAH-11 of 1 models have all five ratings · AHRI 213249674
Ducted, 3.5–4.5 tons56.6(50 is the typical model of its size class)O-AYC48SD-1with ducted air handler I-AYC48VAH-11 of 1 models qualify · AHRI 21324967557.3(50 is the typical model of its size class)O-AYC48SD-1with ducted air handler I-AYC48VAH-11 of 1 models have all five ratings · AHRI 213249675
Non-ducted, up to 1.5 tons72.9(50 is the typical model of its size class)O-AYD09SD-1with ductless indoor unit I-AYD09W-14 of 4 models qualify · AHRI 21326555281.4(50 is the typical model of its size class)O-AYD09SD-1with ductless indoor unit I-AYD09W-14 of 4 models have all five ratings · AHRI 213265552
Non-ducted, 2 tons56.8(50 is the typical model of its size class)O-AYD24SD-32 of 2 models qualify · AHRI 21325558467.5(50 is the typical model of its size class)O-AYD24SD-32 of 2 models have all five ratings · AHRI 213255584
Non-ducted, 2.5–3 tons64.0(50 is the typical model of its size class)O-AYD36SD-41 of 1 models qualify · AHRI 21325558569.5(50 is the typical model of its size class)O-AYD36SD-41 of 1 models have all five ratings · AHRI 213255585
Non-ducted, 3.5–4.5 tons41.8(50 is the typical model of its size class)O-AYD42SD-51 of 1 models qualify · AHRI 21325558644.5(50 is the typical model of its size class)O-AYD42SD-51 of 1 models have all five ratings · AHRI 213255586

All-around board, every manufacturer

Newest Gridless certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified Gridless outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
O-AYD24SD-1Gridless · Gridless HDwith ductless indoor unit I-AYD24W-12 tons24,000 Btu/h · Non-ducted1.7695%10.021.0CEE 25CEE 26XcelES CC1213265555
O-AYD18SD-1Gridless · Gridless HDwith ductless indoor unit I-AYD18W-11.5 tons18,000 Btu/h · Non-ducted1.8086%9.520.5CEE 25CEE 26XcelES CC1213265554
O-AYD12SD-1Gridless · Gridless HDwith ductless indoor unit I-AYD12W-11 ton12,000 Btu/h · Non-ducted1.8983%9.523.5CEE 25CEE 26XcelES CC1213265553
O-AYD09SD-1Gridless · Gridless HDwith ductless indoor unit I-AYD09W-11 ton9,000 Btu/h · Non-ducted1.9496%10.525.5CEE 25CEE 26XcelES CC1213265552
O-AYD42SD-5Gridless · Gridless HD3.5 tons42,000 Btu/h · Non-ducted1.8486%9.020.0CEE 25CEE 26XcelES CC1213255586

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Manufacturers of a similar size, side by side.

Compare with any manufacturer

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