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Della vs EMI heat pumps

Measured against models of the same size and duct type, EMI scores higher on 6 of the 6 ratings. Della has 22 outdoor models, EMI has 22 outdoor models. EMI has no QMID on file and is 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.
Della and EMI 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, EMI scores higher on 6 of the 6 ratings.
  • Della
  • EMI
  • Other ranked manufacturers
DellaEMI

Source: AHRI Directory, NEEP · as of

Average peer percentile, raw median and rank among ranked manufacturers
RatingDellaEMI
Efficiency index39%median — · 27th ranked58%median —
COP at 5°F42%median 1.80 · 25th ranked49%median 1.90
Capacity retention at 5°F37%median 70% · 26th ranked67%median 82%
HSPF223%median 8.5 · 27th ranked68%median 9.6
SEER235%median 19.0 · 27th ranked57%median 18.4
EER228%median 10.0 · 27th ranked48%median 10.9
Heating capacity at 5°F37%median 11,600 Btu/h · 26th ranked64%median 20,000 Btu/h
Outdoor models2222
AHRI certifications2241

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
StandardDellaEMI
CEE 2025 Tier 1 (Split ASHP)54.5%12 models68.2%15 models
CEE 2026 Tier 1 (Split ASHP)45.5%10 models68.2%15 models
CEE Advanced Tier (Split ASHP)0%0 models0%0 models
Xcel Energy Colorado cold-climate ASHP (2025)36.4%8 models63.6%14 models
DOE Cold Climate Heat Pump Challenge0%0 models0%0 models
ENERGY STAR Cold Climate18.2%4 models72.7%16 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 · 3 groups where both have models
  • Della
  • EMI
  • 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 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 typeDellaEMI
Ducted, up to 1.5 tonsNone2 · index 55%
Ducted, 2 tonsNone1 · index 51%
Ducted, 2.5–3 tonsNone4 · index 63%
Ducted, 3.5–4.5 tonsNone3 · index 63%
Non-ducted, up to 1.5 tons16 · index 43%8 · index 56%
Non-ducted, 2 tons3 · index 39%2 · index 49%
Non-ducted, 2.5–3 tons3 · index 27%5 · index 57%
Non-ducted, 3.5–4.5 tonsNone1 · index 78%

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 typeDellaCold-climate score, best modelEMICold-climate score, best model
Ducted, up to 1.5 tonsNo models in this size class63.7(50 is the typical model of its size class)MHSD118DACFCwith ducted air handler MHCO24DACFC2 of 2 models qualify · AHRI 218631472
Ducted, 2 tonsNo models in this size class66.5(50 is the typical model of its size class)MHSD124DACFCwith ducted air handler MHAH124DACFC1 of 1 models qualify · AHRI 216372808
Ducted, 2.5–3 tonsNo models in this size class78.6(50 is the typical model of its size class)MHSD136DACFCwith ducted air handler MHCO37DACFC4 of 4 models qualify · AHRI 218631475
Ducted, 3.5–4.5 tonsNo models in this size class74.9(50 is the typical model of its size class)MHMZ548DA3 of 3 models qualify · AHRI 208121942
Non-ducted, up to 1.5 tons68.8(50 is the typical model of its size class)048-TP-12K2V-23S-OUTwith ductless indoor unit 048-TP-12K2V-23S-IN8 of 16 models qualify · AHRI 21392734389.3(50 is the typical model of its size class) (higher)MHSZ106DAwith ductless indoor unit MHWAL06DA6 of 8 models qualify · AHRI 208121923
Non-ducted, 2 tonsNone on this board (0 of 3 models qualify)86.1(50 is the typical model of its size class)MHSZ124DAwith ductless indoor unit MHCAS24DA1 of 2 models qualify · AHRI 208121931
Non-ducted, 2.5–3 tonsNone on this board (0 of 3 models qualify)79.3(50 is the typical model of its size class)MHMZ436DA2 of 5 models qualify · AHRI 208121938
Non-ducted, 3.5–4.5 tonsNo models in this size class76.2(50 is the typical model of its size class)MHMZ548DA1 of 1 models qualify · AHRI 208121941

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 typeDellaAll-around score, best modelEMIAll-around score, best model
Ducted, up to 1.5 tonsNo models in this size class63.4(50 is the typical model of its size class)MHSD118DACFCwith ducted air handler MHAH118DACFC2 of 2 models have all five ratings · AHRI 216372807
Ducted, 2 tonsNo models in this size class65.8(50 is the typical model of its size class)MHSD124DACFCwith ducted air handler MHAH124DACFC1 of 1 models have all five ratings · AHRI 216372808
Ducted, 2.5–3 tonsNo models in this size class74.6(50 is the typical model of its size class)MHMZ327DA4 of 4 models have all five ratings · AHRI 208121936
Ducted, 3.5–4.5 tonsNo models in this size class82.0(50 is the typical model of its size class)MHMZ548DA3 of 3 models have all five ratings · AHRI 208121942
Non-ducted, up to 1.5 tons70.8(50 is the typical model of its size class)048-TP-12K2V-23S-OUTwith ductless indoor unit 048-TP-12K2V-23S-IN10 of 16 models have all five ratings · AHRI 21392734392.0(50 is the typical model of its size class) (higher)MHSZ106DAwith ductless indoor unit MHWAL06DA8 of 8 models have all five ratings · AHRI 208121923
Non-ducted, 2 tons53.0(50 is the typical model of its size class)048-TP-24K2V-20S-OUTwith ductless indoor unit 048-TP-24K2V-20S-IN2 of 3 models have all five ratings · AHRI 21392734584.3(50 is the typical model of its size class) (higher)MHSZ124DAwith ductless indoor unit MHWAL24DA2 of 2 models have all five ratings · AHRI 208121927
Non-ducted, 2.5–3 tons29.5(50 is the typical model of its size class)048-TL-36K-MODU3 of 3 models have all five ratings · AHRI 21104206782.8(50 is the typical model of its size class) (higher)MHMZ436DA4 of 5 models have all five ratings · AHRI 208121938
Non-ducted, 3.5–4.5 tonsNo models in this size class77.9(50 is the typical model of its size class)MHMZ548DA1 of 1 models have all five ratings · AHRI 208121941

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
RatingDellaEMI
COP at 5°Fbeats 89% · 2.21048-TP-18K2V-22S-OUTNon-ducted, up to 1.5 tonsbeats 91% · 2.21MHSZ124DANon-ducted, 2 tons
Capacity retention at 5°Fbeats 64% · 77%048-TP-9K2V-23S-OUTNon-ducted, up to 1.5 tonsbeats 92% · 107%MHSZ106DANon-ducted, up to 1.5 tons
HSPF2beats 57% · 9.5048-TP-12K2V-23S-OUTNon-ducted, up to 1.5 tonsbeats 98% · 13.6MHSZ106DANon-ducted, up to 1.5 tons
SEER2beats 79% · 23.5048-TP-9K2V-23S-OUTNon-ducted, up to 1.5 tonsbeats 99% · 20.9MHMZ548DADucted, 3.5–4.5 tons
EER2beats 68% · 13.0048-TP-9K2V-23S-OUTNon-ducted, up to 1.5 tonsbeats 98% · 16.2MHSZ109DANon-ducted, up to 1.5 tons
Heating capacity at 5°Fbeats 78% · 13,000 Btu/h048-TL-18K-MODUNon-ducted, up to 1.5 tonsbeats 96% · 20,000 Btu/hMHMZ218DANon-ducted, up to 1.5 tons

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