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1HVAC vs LPS Legacy heat pumps

Measured against models of the same size and duct type, 1HVAC scores higher on 4 of the 6 ratings. 1HVAC has 87 outdoor models, LPS Legacy has 58 outdoor models. 1HVAC and LPS Legacy 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.
1HVAC and LPS Legacy 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, 1HVAC scores higher on 4 of the 6 ratings.
  • 1HVAC
  • LPS Legacy
  • Other ranked manufacturers
1HVACLPS Lega…

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
Rating1HVACLPS Legacy
Efficiency index54% (higher)median —53% (higher)median —
COP at 5°F44%median 1.9051%median 1.97
Capacity retention at 5°F62% (higher)median 77%49% (higher)median 67%
HSPF261%median 9.262%median 9.2
SEER259% (higher)median 18.055% (higher)median 18.5
EER243% (higher)median 11.042% (higher)median 10.6
Heating capacity at 5°F61% (higher)median 23,400 Btu/h50% (higher)median 19,000 Btu/h
Outdoor models8758
AHRI certifications1,190146

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard1HVACLPS Legacy
CEE 2025 Tier 1 (Split ASHP)63.2%55 models58.6%34 models
CEE 2026 Tier 1 (Split ASHP)59.8%52 models55.2%32 models
CEE Advanced Tier (Split ASHP)1.1%1 models3.4%2 models
Xcel Energy Colorado cold-climate ASHP (2025)55.2%48 models39.7%23 models
DOE Cold Climate Heat Pump Challenge1.1%1 models3.4%2 models
ENERGY STAR Cold Climate41.4%36 models43.1%25 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 · 8 groups where both have models
  • 1HVAC
  • LPS Legacy
  • 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, 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

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 type1HVACLPS Legacy
Ducted, up to 1.5 tons9 · index 57%6 · index 61%
Ducted, 2 tons10 · index 58%4 · index 65%
Ducted, 2.5–3 tons18 · index 54%13 · index 53%
Ducted, 3.5–4.5 tons22 · index 53%8 · index 54%
Ducted, 5 tons and upNone3 · index 51%
Non-ducted, up to 1.5 tons21 · index 55%20 · index 53%
Non-ducted, 2 tons6 · index 51%4 · index 47%
Non-ducted, 2.5–3 tons17 · index 53%13 · index 47%
Non-ducted, 3.5–4.5 tons8 · index 47%7 · index 46%

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 type1HVACCold-climate score, best modelLPS LegacyCold-climate score, best model
Ducted, up to 1.5 tons86.9(50 is the typical model of its size class) (higher)ACIQ-18-HPBwith ducted air handler ACIQ-18W-WM8 of 9 models qualify · AHRI 21343322981.3(50 is the typical model of its size class)DLCSRBH18AAKwith ducted air handler DLFSDAH18XHK5 of 6 models qualify · AHRI 211756586
Ducted, 2 tons80.7(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Bwith ducted air handler ACIQ-24CD-HH-MB9 of 9 models qualify · AHRI 20782552279.4(50 is the typical model of its size class)DLCSRBH24AAKwith ducted air handler DLFSDAH24XAK4 of 4 models qualify · AHRI 211756579
Ducted, 2.5–3 tons79.9(50 is the typical model of its size class) (higher)ACIQ-36ZPL-HP230Bwith ducted air handler ACIQ-36CD-HH-MB14 of 19 models qualify · AHRI 21085730178.6(50 is the typical model of its size class)DLCURAH36ABKwith ducted air handler DLFULAH36XCX + CI3 of 13 models qualify · AHRI 213372201
Ducted, 3.5–4.5 tons86.4(50 is the typical model of its size class) (higher)ACIQ-48ZPL-HP230Bwith ducted air handler ACIQ-48CD-HH-MB14 of 22 models qualify · AHRI 21085730274.9(50 is the typical model of its size class)DLCURAH48ABKwith ducted air handler DLFUAAH60XAK4 of 8 models qualify · AHRI 217197708
Ducted, 5 tons and upNo models in this size classNone on this board (0 of 3 models qualify)
Non-ducted, up to 1.5 tons89.3(50 is the typical model of its size class)ACIQ-06ZPL-HP230Bwith ductless indoor unit ACIQ-06W-HH-MC11 of 21 models qualify · AHRI 21085729495.0(50 is the typical model of its size class) (higher)DLCPRBH18AAKwith ductless indoor unit DLFPHBH18XAK11 of 20 models qualify · AHRI 211756581
Non-ducted, 2 tons87.1(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Bwith ductless indoor unit ACIQ-24FM-HH-MB3 of 6 models qualify · AHRI 20782552586.1(50 is the typical model of its size class)DLCSRBH24AAKwith ductless indoor unit DLFSCBH24XAK2 of 4 models qualify · AHRI 211756560
Non-ducted, 2.5–3 tons79.3(50 is the typical model of its size class) (higher)ACIQ-36Z-HH-M4B9 of 17 models qualify · AHRI 20782557073.4(50 is the typical model of its size class)DLCMHBH36DAK2 of 13 models qualify · AHRI 211756577
Non-ducted, 3.5–4.5 tons76.8(50 is the typical model of its size class)ACIQ-60ZPL-HP230Bwith ductless indoor unit ACIQ-60FM-HH-MB5 of 8 models qualify · AHRI 21085730680.5(50 is the typical model of its size class) (higher)DLCMHBH48EAK3 of 7 models qualify · AHRI 211756575

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 type1HVACAll-around score, best modelLPS LegacyAll-around score, best model
Ducted, up to 1.5 tons85.2(50 is the typical model of its size class)ACIQ-09ZPL-HP230Bwith ducted air handler ACIQ-09CD-HH-MB9 of 9 models have all five ratings · AHRI 20782551985.2(50 is the typical model of its size class)DLCSRBH09AAKwith ducted air handler DLFSDAH09XAK6 of 6 models have all five ratings · AHRI 211756568
Ducted, 2 tons80.8(50 is the typical model of its size class) (higher)ACIQ-24ZPL-HP230Bwith ducted air handler ACIQ-24CD-HH-MB10 of 10 models have all five ratings · AHRI 20782552280.1(50 is the typical model of its size class)DLCSRBH24AAKwith ducted air handler DLFSDAH24XAK4 of 4 models have all five ratings · AHRI 211756579
Ducted, 2.5–3 tons75.4(50 is the typical model of its size class) (higher)HVH837GKA2*with indoor coil EN(A,D,W)4X60L24**+WALLCON and furnace *95CSU0802120A18 of 18 models have all five ratings · AHRI 21047087872.0(50 is the typical model of its size class)DLCMHBH30DAK12 of 13 models have all five ratings · AHRI 211756500
Ducted, 3.5–4.5 tons82.0(50 is the typical model of its size class)ACIQ-48Z-HH-M5B21 of 21 models have all five ratings · AHRI 20782557482.0(50 is the typical model of its size class)DLCMHBH48EAK7 of 8 models have all five ratings · AHRI 211756576
Ducted, 5 tons and up41.7(50 is the typical model of its size class)ACIQ-60-EHPBwith ducted air handler ACIQ-60AHB1 of 1 models have all five ratings · AHRI 21343322357.1(50 is the typical model of its size class) (higher)DLCLRCH58AAKwith ducted air handler DLFLDAH58XHK3 of 3 models have all five ratings · AHRI 211756477
Non-ducted, up to 1.5 tons92.0(50 is the typical model of its size class)ACIQ-06ZPL-HP230Bwith ductless indoor unit ACIQ-06W-HH-MC21 of 21 models have all five ratings · AHRI 21085729493.6(50 is the typical model of its size class) (higher)DLCPRBH18AAKwith ductless indoor unit DLFPHBH18XAK20 of 20 models have all five ratings · AHRI 211756581
Non-ducted, 2 tons84.3(50 is the typical model of its size class)ACIQ-24ZPL-HP230Bwith ductless indoor unit ACIQ-24W-HH-MC6 of 6 models have all five ratings · AHRI 21085729884.3(50 is the typical model of its size class)DLCSRBH24AAKwith ductless indoor unit DLFSHCH24XAK4 of 4 models have all five ratings · AHRI 211756584
Non-ducted, 2.5–3 tons82.8(50 is the typical model of its size class) (higher)ACIQ-36Z-HH-M4B15 of 17 models have all five ratings · AHRI 20782557070.8(50 is the typical model of its size class)DLCMHBH36DAK11 of 13 models have all five ratings · AHRI 211756577
Non-ducted, 3.5–4.5 tons77.9(50 is the typical model of its size class) (higher)ACIQ-48Z-HH-M5B8 of 8 models have all five ratings · AHRI 20782557373.8(50 is the typical model of its size class)DLCMHBH48EAK5 of 7 models have all five ratings · AHRI 211756575

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
Rating1HVACLPS Legacy
COP at 5°Fbeats 91% · 2.21ACIQ-24ZPL-HP230BNon-ducted, 2 tonsbeats 99% · 2.89DLCPRBH18AAKNon-ducted, up to 1.5 tons
Capacity retention at 5°Fbeats 99% · 144%SC-09ZPL-HP230Non-ducted, up to 1.5 tonsbeats 97% · 120%DLCPRBH18AAKNon-ducted, up to 1.5 tons
HSPF2beats 99% · 10.3ACIQ-48ZPL-HP230BDucted, 3.5–4.5 tonsbeats 100% · 15.0DLCPRBH09AAKNon-ducted, up to 1.5 tons
SEER2beats 99% · 24.6ES-27Z-M3BNon-ducted, 2.5–3 tonsbeats 99% · 20.9DLCMHBH48EAKDucted, 3.5–4.5 tons
EER2beats 99% · 16.6SC-09ZPL-HP230Non-ducted, up to 1.5 tonsbeats 98% · 16.2DLCSRBH09AAKNon-ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 99% · 56,500 Btu/hACIQ-60ZPL-HP230BNon-ducted, 3.5–4.5 tonsbeats 100% · 24,000 Btu/hDLCPRBH18AAKNon-ducted, up to 1.5 tons

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