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THERMAL ZONE heat pump efficiency: 88 outdoor models compared

THERMAL ZONE has 88 heat pump outdoor models certified with this refrigerant group, in 509 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 THERMAL ZONE makes. THERMAL ZONE 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
88
AHRI certifications
509
Efficiency index
43%
Typical model vs same-size, same-type peers (35 models)
Meet CEE 2025
12.5%
11 models

How THERMAL ZONE 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.
THERMAL ZONE against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of THERMAL ZONE’s own modelsTHERMAL ZONE is strongest on COP at 5°F (its typical model beats 68% of comparable models) and weakest on SEER2 (26%).
  • THERMAL ZONE
  • Middle half of its models
  • Other ranked manufacturers
THERMAL …

Source: AHRI Directory, NEEP · as of

Average peer percentile of THERMAL ZONE’s models
RatingBeats comparable modelsRankRaw median
Efficiency index35 models scored43%Not ranked—
COP at 5°F35 models scored68%Not ranked2.10
Capacity retention at 5°F35 models scored37%Not ranked56%
HSPF268 models scored31%Not ranked7.5
SEER268 models scored26%Not ranked14.3
EER268 models scored36%Not ranked10.6
Heating capacity at 5°F35 models scored40%Not ranked19,900 Btu/h

Standards met

Share of THERMAL ZONE’s models with at least one qualifying certification
StandardShareModels
CEE 2025 Tier 1 (Split ASHP)12.5%11
CEE 2026 Tier 1 (Split ASHP)11.4%10
CEE Advanced Tier (Split ASHP)0%0
Xcel Energy Colorado cold-climate ASHP (2025)6.8%6
DOE Cold Climate Heat Pump Challenge0%0
ENERGY STAR Cold Climate21.6%19

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.
THERMAL ZONE’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
  • THERMAL ZONE (median, middle 50%, 10th–90th)
  • All models of the group
Ducted, up to 1.5 tons2.00884 modelsDucted, 2 tons2.00821 modelsDucted, 2.5–3 tons1.901,614 modelsDucted, 3.5–4.5 tons1.911,492 modelsDucted, 5 tons and up1.90239 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
Ducted, up to 1.5 tons832%68%24%21%
Ducted, 2 tons942%73%36%28%
Ducted, 2.5–3 tons2744%70%30%22%
Ducted, 3.5–4.5 tons3146%64%35%30%
Ducted, 5 tons and up1255%61%30%31%
Non-ducted, 2.5–3 tons1——5%5%

Every THERMAL ZONE model in the market

THERMAL ZONE’s 88 models with a known size and duct type, over the shape of the whole catalog.
THERMAL ZONE models by size and ratingColoured: THERMAL ZONE · grey shapes: all 11,475 models · lines: catalog medians by size
  • THERMAL ZONE models
  • Ducted median by size
  • Non-ducted median by size
  • Every model at each size (width = count)
  • Standard threshold

Dots: 88 thermal zone 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 THERMAL ZONE 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 THERMAL ZONE 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
1TZPLV362PATHERMAL ZONE · TZP Serieswith ducted air handler MAC-36HWDN1-MN03 tons35,000 Btu/h · Ducted82%2.0010.032,00015.2CEE 25CEE 26XcelES CC7213885869Ducted, 2.5–3 tons78.6
2TZPLV482PATHERMAL ZONE · TZP Serieswith ducted air handler TZHVLE4821JA4 tons47,000 Btu/h · Ducted92%1.909.446,00015.6XcelES CC4211126512Ducted, 3.5–4.5 tons73.8
3TZPLV602PATHERMAL ZONE · TZP Serieswith ducted air handler TZHVLE6024JA4.5 tons55,000 Btu/h · Ducted82%1.919.448,50015.3ES CC3211126504Ducted, 3.5–4.5 tons71.3
4TZPLV302PATHERMAL ZONE · TZP Serieswith ducted air handler MAC-36HWDN1-MN02.5 tons30,000 Btu/h · Ducted82%1.859.727,00015.5CEE 25CEE 26XcelES CC5213885867Ducted, 2.5–3 tons67.8
5TZPLV182PATHERMAL ZONEwith ducted air handler H,RG21924+TD1.5 tons17,700 Btu/h · Ducted109%2.048.918,62916.0CEE 25CEE 26XcelES CC4214311494Ducted, up to 1.5 tons67.7

All-around best

Top 5 THERMAL ZONE 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
1TZP15AZ60AJ2NTHERMAL ZONE · Serieswith ducted air handler TZHDLTST6024*NANAlso listed as TZPLAD1560AJN5 tons57,000 Btu/h · Ducted54%2.308.116.011.7CEE 25CEE 26ES CC2211641701Ducted, 5 tons and up67.661.873.4Not a pick
2TZPLV242PATHERMAL ZONE · TZP Serieswith ducted air handler TZHVLE2417JA2 tons24,000 Btu/h · Ducted94%1.9110.017.411.7CEE 25CEE 26XcelES CC7211126503Ducted, 2 tons65.866.565.166.5
3TZPLV182PATHERMAL ZONE · TZP Serieswith ducted air handler TZHVLE1817JA1.5 tons18,000 Btu/h · Ducted87%2.049.318.012.4CEE 25CEE 26XcelES CC4211126509Ducted, up to 1.5 tons63.460.466.367.7
4TZPLAD1548AJNTHERMAL ZONE · Performancewith ducted air handler TZHDLVST4821*NAN4 tons45,500 Btu/h · Ducted60%2.508.115.211.7ES CC30212508016Ducted, 3.5–4.5 tons62.160.963.2Not a pick
5TZP15AZ42AJ2NTHERMAL ZONE · Valuewith indoor coil TCFZ4821STANM and furnace TZ80DZ2V100C5*A3.5 tons40,000 Btu/h · Ducted58%2.408.115.211.7ES CC4212508047Ducted, 3.5–4.5 tons60.858.463.2Not a pick

Best model on each rating

THERMAL ZONE’s model with the highest peer percentile on each rating, ranked by that one rating only
RatingModelValueCompared withBeatsAHRI ref.
COP at 5°FTZPLAD1560AJN2.50Ducted, 3.5–4.5 tons90%212506483
Capacity retention at 5°FTZPLV362PA102%Ducted, 2.5–3 tons97%214311498
HSPF2TZPLV362PA10.0Ducted, 2.5–3 tons93%213885869
SEER2TZP15AZ60AJ2NAlso listed as TZPLAD1560AJN16.0Ducted, 5 tons and up70%211641701
EER2TZP15AZ60AJ2NAlso listed as TZPLAD1560AJN11.7Ducted, 5 tons and up78%211641701
Heating capacity at 5°FTZPLV602PA48,500 Btu/hDucted, 3.5–4.5 tons95%211126504

All 88 THERMAL ZONE models in Explore

THERMAL ZONE 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.
THERMAL ZONE: 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, up to 1.5 tons67.7(50 is the typical model of its size class)TZPLV182PAwith ducted air handler H,RG21924+TD1 of 8 models qualify · AHRI 21431149463.4(50 is the typical model of its size class)TZPLV182PAwith ducted air handler TZHVLE1817JA6 of 8 models have all five ratings · AHRI 211126509
Ducted, 2 tons66.5(50 is the typical model of its size class)TZPLV242PAwith ducted air handler TZHVLE2417JA2 of 9 models qualify · AHRI 21112650365.8(50 is the typical model of its size class)TZPLV242PAwith ducted air handler TZHVLE2417JA6 of 9 models have all five ratings · AHRI 211126503
Ducted, 2.5–3 tons78.6(50 is the typical model of its size class)TZPLV362PAwith ducted air handler MAC-36HWDN1-MN02 of 27 models qualify · AHRI 21388586958.0(50 is the typical model of its size class)TZPLAD1530AJNwith ducted air handler TZHDLVST3617*NAN10 of 27 models have all five ratings · AHRI 212508013
Ducted, 3.5–4.5 tons73.8(50 is the typical model of its size class)TZPLV482PAwith ducted air handler TZHVLE4821JA2 of 31 models qualify · AHRI 21112651262.1(50 is the typical model of its size class)TZPLAD1548AJNwith ducted air handler TZHDLVST4821*NAN10 of 30 models have all five ratings · AHRI 212508016
Ducted, 5 tons and upNone on this board (0 of 12 models qualify)67.6(50 is the typical model of its size class)TZP15AZ60AJ2Nwith ducted air handler TZHDLTST6024*NANAlso listed as TZPLAD1560AJN3 of 13 models have all five ratings · AHRI 211641701
Non-ducted, 2.5–3 tonsNone on this board (0 of 1 models qualify)None on this board (0 of 1 models have all five ratings)

All-around board, every manufacturer

Newest THERMAL ZONE certifications

By AHRI reference number; AHRI issues references in increasing order.
The 5 most recently certified THERMAL ZONE outdoor models
Outdoor modelSize · typeCOP@5°FCap. 5/47HSPF2SEER2MeetsCombosAHRI ref.
TZPLAS1418AJNTHERMAL ZONEwith ducted air handler M2430C*1-BA*+M2430B**-EC1.5 tons15,000 Btu/h · Ducted—57%6.812.0None5216707367
TZPLAD1548AJNTHERMAL ZONEwith ducted air handler V3642B-1EC*B3.5 tons40,000 Btu/h · Ducted—59%7.212.0ES CC30216707366
TZPLAD1536AJNTHERMAL ZONEwith ducted air handler M3036C*1-BA*+M3036B**-EC2.5 tons30,000 Btu/h · Ducted—67%6.812.0ES CC26216707364
TZPLAD1530AJNTHERMAL ZONEwith ducted air handler V2430B-1EC*B2 tons24,800 Btu/h · Ducted—65%6.812.0CEE 25CEE 26ES CC27216707363
TZPLAD1524AJNTHERMAL ZONEwith ducted air handler M2430C*1-BA*+M2430B**-EC1.5 tons20,000 Btu/h · Ducted—64%6.812.0CEE 25CEE 26ES CC23216707360

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