Dettson heat pump efficiency: 10 outdoor models compared

Dettson has 10 heat pump outdoor models certified with this refrigerant group, in 36 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 Dettson makes. Dettson has no QMID (IRS Qualified Manufacturer ID) on file, so it is not ranked against other manufacturers.

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ManufacturerData as of Oct 11, 2026updated Oct 11, 2026 · sources

Outdoor models: 10
AHRI certifications: 36
Efficiency index: 52%; Typical model vs same-size, same-type peers (10 models)
Meet CEE 2025: 60%; 6 models

How Dettson 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.

Dettson against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Dettson’s own modelsDettson is strongest on heating capacity at 5°F (its typical model beats 80% of comparable models) and weakest on EER2 (30%).

Dettson
Middle half of its models
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 11, 2026

Average peer percentile of Dettson’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index10 models scored	52%	Not ranked	—
COP at 5°F10 models scored	55%	Not ranked	2.00
Capacity retention at 5°F10 models scored	71%	Not ranked	82%
HSPF210 models scored	78%	Not ranked	9.6
SEER210 models scored	42%	Not ranked	15.4
EER210 models scored	30%	Not ranked	10.6
Heating capacity at 5°F10 models scored	80%	Not ranked	25,000 Btu/h

Standards met

Share of Dettson’s models with at least one qualifying certification
Standard	Share	Models
CEE 2025 Tier 1 (Split ASHP)	60%	6
CEE 2026 Tier 1 (Split ASHP)	60%	6
CEE Advanced Tier (Split ASHP)	0%	0
Xcel Energy Colorado cold-climate ASHP (2025)	80%	8
DOE Cold Climate Heat Pump Challenge	0%	0
ENERGY STAR Cold Climate	100%	10

Sizes and duct types offered

Models per peer group, and how they score against the other models of that group.

Dettson’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

Dettson (median, middle 50%, 10th–90th)
All models of the group

Source: AHRI Directory · as of Oct 11, 2026

Share of comparable models beaten, per peer group
Size and duct type	Models	Index	COP@5°F	HSPF2	SEER2
Ducted, up to 1.5 tons	3	51%	69%	66%	34%
Ducted, 2 tons	2	57%	57%	84%	42%
Ducted, 2.5–3 tons	3	49%	47%	79%	39%
Ducted, 3.5–4.5 tons	2	53%	45%	88%	58%

Every Dettson model in the market

Dettson’s 10 models with a known size and duct type, over the shape of the whole catalog.

Dettson models by size and ratingColoured: Dettson · grey shapes: all 11,475 models · lines: catalog medians by size

Dettson models
Ducted median by size
Non-ducted median by size
Every model at each size (width = count)
Standard threshold

Dots: 10 dettson 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, size	Models	10th pct.	25th	Median	75th	90th
Ducted, 0.5 tons	175	1.70	1.85	1.90	2.10	2.26
Ducted, 1 ton	340	1.85	1.90	2.00	2.40	2.65
Ducted, 1.5 tons	789	1.75	1.85	2.00	2.20	2.55
Ducted, 2 tons	782	1.73	1.80	2.00	2.10	2.33
Ducted, 2.5 tons	735	1.71	1.80	1.90	2.09	2.48
Ducted, 3 tons	652	1.68	1.70	1.90	2.06	2.36
Ducted, 3.5 tons	641	1.61	1.80	1.95	2.20	2.50
Ducted, 4 tons	367	1.70	1.80	1.91	2.02	2.52
Ducted, 4.5 tons	544	1.70	1.80	1.91	2.08	2.34
Ducted, 5 tons	25	1.80	1.80	1.90	1.90	2.15
Non-ducted, 0.5 tons	717	1.75	1.81	1.97	2.10	2.19
Non-ducted, 1 ton	1,064	1.75	1.80	1.90	2.07	2.25
Non-ducted, 1.5 tons	886	1.80	1.80	1.87	2.07	2.21
Non-ducted, 2 tons	564	1.80	1.80	1.83	2.04	2.21
Non-ducted, 2.5 tons	275	1.80	1.81	1.84	1.86	2.03
Non-ducted, 3 tons	502	1.80	1.80	1.90	2.00	2.09
Non-ducted, 3.5 tons	70	1.82	1.83	1.90	2.00	2.28
Non-ducted, 4 tons	263	1.80	1.80	1.98	2.00	2.10
Non-ducted, 4.5 tons	103	1.77	1.77	1.80	1.97	2.02
Non-ducted, 5 tons	29	1.98	2.00	2.10	2.30	2.47

Source: AHRI Directory · as of Oct 11, 2026

Top Dettson 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 Dettson 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 model	Size · type	Cap. 5/47	COP@5°F	HSPF2	Btu/h @5°F	SEER2	Meets	Combos	AHRI ref.	Compared with	Score
1EVD-36-ODettson · EVD serieswith ducted air handler MAC36H2124E	3 tons35,000 Btu/h · Ducted	82%	2.00	10.0	32,000	15.2	CEE 25CEE 26XcelES CC	9	213160483	Ducted, 2.5–3 tons	78.6
2MHD-24Dettson · MHD serieswith ducted air handler MHD-CC2.0-17.5-M	2 tons23,000 Btu/h · Ducted	93%	2.08	9.8	23,000	15.2	XcelES CC	2	210365428	Ducted, 2 tons	75.6
3EVD-48-ODettson · EVD serieswith ducted air handler EVD-48-I	4 tons47,000 Btu/h · Ducted	92%	1.90	9.4	46,000	15.6	ES CC	2	210365435	Ducted, 3.5–4.5 tons	73.8
4EVD-60-ODettson · EVD serieswith ducted air handler EVD-60-I	4.5 tons55,000 Btu/h · Ducted	82%	1.91	9.4	48,500	15.3	ES CC	2	210365436	Ducted, 3.5–4.5 tons	71.3
5EVD-30-ODettsonwith ducted air handler *G8J936+TD	2.5 tons29,800 Btu/h · Ducted	86%	1.85	9.5	27,000	15.2	CEE 25CEE 26XcelES CC	7	213369636	Ducted, 2.5–3 tons	69.5

All-around best

Top 5 Dettson 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 model	Size · type	Cap. 5/47	COP@5°F	HSPF2	SEER2	EER2	Meets	Combos	AHRI ref.	Compared with	Score	Heating half	Cooling half	Cold-climate score
1EVD-36-O-SDettson · EVD serieswith ducted air handler EVD-36-I	3 tons35,000 Btu/h · Ducted	97%	1.80	9.5	16.3	11.7	CEE 25CEE 26XcelES CC	3	213488871	Ducted, 2.5–3 tons	68.5	68.9	68.1	68.9
2EVD-24-ODettson · EVD serieswith ducted air handler EVD-24-I	2 tons24,000 Btu/h · Ducted	94%	1.91	10.0	17.4	11.7	CEE 25CEE 26XcelES CC	4	210365432	Ducted, 2 tons	65.8	66.5	65.1	66.5
3EVD-18-ODettson · EVD serieswith ducted air handler EVD-18-I	1.5 tons18,000 Btu/h · Ducted	87%	2.04	9.3	18.0	12.4	CEE 25CEE 26XcelES CC	4	210365431	Ducted, up to 1.5 tons	63.4	60.4	66.3	63.7
4MHD-24Dettson · MHD serieswith ducted air handler MHD-CC2.0-17.5-M	2 tons23,000 Btu/h · Ducted	93%	2.08	9.8	15.2	11.7	XcelES CC	2	210365428	Ducted, 2 tons	60.0	75.6	44.4	75.6
5EVD-36-ODettson · EVD serieswith ducted air handler EVD-36-I	3 tons36,000 Btu/h · Ducted	86%	1.97	9.5	16.0	10.0	CEE 25CEE 26XcelES CC	9	210365434	Ducted, 2.5–3 tons	56.1	74.7	37.6	78.6

Best model on each rating

Dettson’s model with the highest peer percentile on each rating, ranked by that one rating only
Rating	Model	Value	Compared with	Beats	AHRI ref.
COP at 5°F	MHD-18	2.21	Ducted, up to 1.5 tons	79%	210365427
Capacity retention at 5°F	EVD-48-O	92%	Ducted, 3.5–4.5 tons	92%	210365435
HSPF2	EVD-36-O	10.0	Ducted, 2.5–3 tons	93%	213160483
SEER2	EVD-24-O	17.4	Ducted, 2 tons	67%	210365432
EER2	EVD-18-O	12.4	Ducted, up to 1.5 tons	72%	210365431
Heating capacity at 5°F	EVD-36-O-S	38,000 Btu/h	Ducted, 2.5–3 tons	96%	213488871

All 10 Dettson models in Explore

Dettson 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.

Dettson: 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 type	Cold-climate pickCold-climate score, best model	All-around bestAll-around score, best model
Ducted, up to 1.5 tons	65.2(50 is the typical model of its size class)EVD-24-O*with ducted air handler MAC24H1418E3 of 3 models qualify · AHRI 213386698	63.4(50 is the typical model of its size class)EVD-18-Owith ducted air handler EVD-18-I3 of 3 models have all five ratings · AHRI 210365431
Ducted, 2 tons	75.6(50 is the typical model of its size class)MHD-24with ducted air handler MHD-CC2.0-17.5-M2 of 2 models qualify · AHRI 210365428	65.8(50 is the typical model of its size class)EVD-24-Owith ducted air handler EVD-24-I2 of 2 models have all five ratings · AHRI 210365432
Ducted, 2.5–3 tons	78.6(50 is the typical model of its size class)EVD-36-Owith ducted air handler MAC36H2124E3 of 3 models qualify · AHRI 213160483	68.5(50 is the typical model of its size class)EVD-36-O-Swith ducted air handler EVD-36-I3 of 3 models have all five ratings · AHRI 213488871
Ducted, 3.5–4.5 tons	73.8(50 is the typical model of its size class)EVD-48-Owith ducted air handler EVD-48-I2 of 2 models qualify · AHRI 210365435	53.3(50 is the typical model of its size class)EVD-60-Owith ducted air handler EVD-60-I2 of 2 models have all five ratings · AHRI 210365436

All-around board, every manufacturer

Newest Dettson certifications

By AHRI reference number; AHRI issues references in increasing order.

The 5 most recently certified Dettson outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
EVD-30-ODettson · EVD Serieswith ducted air handler MAC36H1724E	2.5 tons29,000 Btu/h · Ducted	1.80	73%	8.5	15.2	CEE 25CEE 26XcelES CC	7	218469227
EVD-36-O-SDettson · EVD serieswith ducted air handler EVD-36-I	3 tons35,000 Btu/h · Ducted	1.80	97%	9.5	16.3	CEE 25CEE 26XcelES CC	3	213488871
EVD-24-ODettson · EVD serieswith ducted air handler MAC24H1418E	2 tons24,000 Btu/h · Ducted	2.00	80%	9.8	16.1	CEE 25CEE 26XcelES CC	4	213386699
EVD-24-O*Dettson · EVD serieswith ducted air handler MAC24H1418E	1.5 tons20,000 Btu/h · Ducted	2.00	80%	10.2	16.3	CEE 25CEE 26XcelES CC	1	213386698
EVD-36-ODettsonwith ducted air handler *G8J936+TD	3 tons34,600 Btu/h · Ducted	1.80	77%	8.5	15.2	CEE 25CEE 26XcelES CC	9	213369639

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Compare with any manufacturer

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