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RAMSOND heat pump efficiency: 8 outdoor models compared

RAMSOND has 8 heat pump outdoor models certified with this refrigerant group, in 8 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 RAMSOND makes. RAMSOND 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
8
AHRI certifications
8
Efficiency index
46%
Typical model vs same-size, same-type peers (8 models)
Meet CEE 2025
100%
8 models

How RAMSOND 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.
RAMSOND against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of RAMSOND’s own modelsRAMSOND is strongest on SEER2 (its typical model beats 58% of comparable models) and weakest on EER2 (37%).
  • RAMSOND
  • Middle half of its models
  • Other ranked manufacturers
RAMSOND

Source: AHRI Directory, NEEP · as of

Average peer percentile of RAMSOND’s models
RatingBeats comparable modelsRankRaw median
Efficiency index8 models scored46%Not ranked—
COP at 5°F8 models scored41%Not ranked2.00
Capacity retention at 5°F8 models scored38%Not ranked72%
HSPF28 models scored55%Not ranked9.8
SEER28 models scored58%Not ranked21.5
EER28 models scored37%Not ranked11.2
Heating capacity at 5°F8 models scored43%Not ranked16,200 Btu/h

Standards met

Share of RAMSOND’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)100%8
CEE 2026 Tier 1 (Split ASHP)100%8
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)75%6
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.
RAMSOND’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
  • RAMSOND (median, middle 50%, 10th–90th)
  • All models of the group
Non-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

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 tons442%27%55%46%
Non-ducted, 2 tons140%71%44%49%
Non-ducted, 2.5–3 tons258%53%70%79%
Non-ducted, 3.5–4.5 tons142%37%40%73%

Every RAMSOND model in the market

RAMSOND’s 8 models with a known size and duct type, over the shape of the whole catalog.
RAMSOND models by size and ratingColoured: RAMSOND · grey shapes: all 14,508 models · lines: catalog medians by size
  • RAMSOND models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 8 ramsond models, each through its representative certification, in the colour of the rating shown. The grey shapes count all 14,508 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 tons8261.641.711.751.852.24
Ducted, 1 ton4071.801.902.052.412.45
Ducted, 1.5 tons9921.751.862.002.172.40
Ducted, 2 tons9991.751.862.002.182.30
Ducted, 2.5 tons1,0401.701.802.002.102.36
Ducted, 3 tons6961.801.902.002.102.42
Ducted, 3.5 tons8641.701.802.002.102.46
Ducted, 4 tons7271.801.862.002.122.40
Ducted, 4.5 tons6901.701.801.902.102.20
Ducted, 5 tons861.892.002.102.102.10
Non-ducted, 0.5 tons1,1861.751.801.902.002.22
Non-ducted, 1 ton1,3431.801.801.992.102.21
Non-ducted, 1.5 tons1,2611.801.802.002.102.31
Non-ducted, 2 tons7611.801.982.002.102.30
Non-ducted, 2.5 tons4031.801.852.002.002.10
Non-ducted, 3 tons4731.901.982.002.032.20
Non-ducted, 3.5 tons2802.002.002.002.052.10
Non-ducted, 4 tons2041.962.002.052.102.11
Non-ducted, 4.5 tons781.901.911.952.012.01
Non-ducted, 5 tons841.992.002.052.202.20

Source: AHRI Directory · as of

Top RAMSOND 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 RAMSOND 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
1RDZ-18MHP-230V-ORAMSOND1.5 tons18,000 Btu/h · Non-ducted80%2.0010.516,00024.0CEE 25CEE 26Xcel1217563453Non-ducted, up to 1.5 tons68.6
2RDZ-28MHP-230V-ORAMSOND2.5 tons27,000 Btu/h · Non-ducted71%2.0010.519,80024.0CEE 25CEE 26Xcel1217563454Non-ducted, 2.5–3 tons57.5
3RDZ-36MHP-230V-ORAMSOND3 tons35,000 Btu/h · Non-ducted72%2.0010.026,00022.5CEE 25CEE 26Xcel1217563455Non-ducted, 2.5–3 tons52.5
4GW-12HP-230VORAMSONDwith ductless indoor unit GW-12HP-230VI1 ton12,000 Btu/h · Non-ducted76%1.809.59,10020.0CEE 25CEE 26Xcel1218352807Non-ducted, up to 1.5 tons38.5
5GW-12HP-115VORAMSONDwith ductless indoor unit GW-12HP-115VI1 ton12,000 Btu/h · Non-ducted75%1.799.59,00020.0CEE 25CEE 26Xcel1218352806Non-ducted, up to 1.5 tons34.4

All-around best

Top 5 RAMSOND 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
1RDZ-18MHP-230V-ORAMSOND1.5 tons18,000 Btu/h · Non-ducted80%2.0010.524.013.0CEE 25CEE 26Xcel1217563453Non-ducted, up to 1.5 tons72.268.675.868.6
2RDZ-28MHP-230V-ORAMSOND2.5 tons27,000 Btu/h · Non-ducted71%2.0010.524.012.0CEE 25CEE 26Xcel1217563454Non-ducted, 2.5–3 tons65.157.572.657.5
3RDZ-36MHP-230V-ORAMSOND3 tons35,000 Btu/h · Non-ducted72%2.0010.022.511.1CEE 25CEE 26Xcel1217563455Non-ducted, 2.5–3 tons51.152.549.752.5
4RDZ-45MHP-230V-ORAMSOND3.5 tons42,000 Btu/h · Non-ducted71%2.0010.022.011.2CEE 25CEE 26Xcel1217563456Non-ducted, 3.5–4.5 tons42.431.253.731.2
5GW-24HP-230VORAMSONDwith ductless indoor unit GW-24HP-230VI2 tons24,000 Btu/h · Non-ducted68%2.109.521.010.5CEE 25CEE 261218352809Non-ducted, 2 tons40.445.935.0Not a pick

Best model on each rating

RAMSOND’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FGW-24HP-230VO2.10Non-ducted, 2 tons71%218352809
Capacity retention at 5°FRDZ-18MHP-230V-O80%Non-ducted, up to 1.5 tons61%217563453
HSPF2RDZ-28MHP-230V-O10.5Non-ducted, 2.5–3 tons80%217563454
SEER2RDZ-28MHP-230V-O24.0Non-ducted, 2.5–3 tons91%217563454
EER2RDZ-18MHP-230V-O13.0Non-ducted, up to 1.5 tons70%217563453
Heating capacity at 5°FRDZ-18MHP-230V-O16,000 Btu/hNon-ducted, up to 1.5 tons88%217563453

All 8 RAMSOND models in Explore

RAMSOND 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.
RAMSOND: 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 tons68.6(50 is the typical model of its size class)RDZ-18MHP-230V-O3 of 4 models qualify · AHRI 21756345372.2(50 is the typical model of its size class)RDZ-18MHP-230V-O4 of 4 models have all five ratings · AHRI 217563453
Non-ducted, 2 tonsNone on this board (0 of 1 models qualify)40.4(50 is the typical model of its size class)GW-24HP-230VOwith ductless indoor unit GW-24HP-230VI1 of 1 models have all five ratings · AHRI 218352809
Non-ducted, 2.5–3 tons57.5(50 is the typical model of its size class)RDZ-28MHP-230V-O2 of 2 models qualify · AHRI 21756345465.1(50 is the typical model of its size class)RDZ-28MHP-230V-O2 of 2 models have all five ratings · AHRI 217563454
Non-ducted, 3.5–4.5 tons31.2(50 is the typical model of its size class)RDZ-45MHP-230V-O1 of 1 models qualify · AHRI 21756345642.4(50 is the typical model of its size class)RDZ-45MHP-230V-O1 of 1 models have all five ratings · AHRI 217563456

All-around board, every manufacturer

Newest RAMSOND certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified RAMSOND outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
GW-24HP-230VORAMSONDwith ductless indoor unit GW-24HP-230VI2 tons24,000 Btu/h · Non-ducted2.1068%9.521.0CEE 25CEE 261218352809
GW-18HP-230VORAMSONDwith ductless indoor unit GW-18HP-230VI1.5 tons18,000 Btu/h · Non-ducted1.8069%9.521.0CEE 25CEE 261218352808
GW-12HP-230VORAMSONDwith ductless indoor unit GW-12HP-230VI1 ton12,000 Btu/h · Non-ducted1.8076%9.520.0CEE 25CEE 26Xcel1218352807
GW-12HP-115VORAMSONDwith ductless indoor unit GW-12HP-115VI1 ton12,000 Btu/h · Non-ducted1.7975%9.520.0CEE 25CEE 26Xcel1218352806
RDZ-45MHP-230V-ORAMSOND3.5 tons42,000 Btu/h · Non-ducted2.0071%10.022.0CEE 25CEE 26Xcel1217563456

Shares hardware with

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

No shared hardware found for RAMSOND in this group.

Compare RAMSOND

Manufacturers of a similar size, side by side.

Compare with any manufacturer

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