MSH LEGACY heat pump efficiency: 18 outdoor models compared

MSH LEGACY has 18 heat pump outdoor models certified with this refrigerant group, in 1,716 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 MSH LEGACY makes. MSH LEGACY 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: 18
AHRI certifications: 1,716
Efficiency index: 51%; Typical model vs same-size, same-type peers (14 models)
Meet CEE 2025: 0%; 0 models

How MSH LEGACY 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.

MSH LEGACY against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of MSH LEGACY’s own modelsMSH LEGACY is strongest on EER2 (its typical model beats 91% of comparable models) and weakest on capacity retention at 5°F (16%).

MSH LEGACY
Middle half of its models
Other ranked manufacturers

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

Average peer percentile of MSH LEGACY’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index14 models scored	51%	Not ranked	—
COP at 5°F14 models scored	78%	Not ranked	2.22
Capacity retention at 5°F14 models scored	16%	Not ranked	47%
HSPF214 models scored	33%	Not ranked	7.5
SEER214 models scored	29%	Not ranked	15.0
EER214 models scored	91%	Not ranked	12.5
Heating capacity at 5°F14 models scored	17%	Not ranked	16,600 Btu/h

Standards met

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

Sizes and duct types offered

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

MSH LEGACY’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

MSH LEGACY (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	2	41%	62%	12%	24%
Ducted, 2 tons	2	53%	76%	45%	31%
Ducted, 2.5–3 tons	4	51%	83%	35%	25%
Ducted, 3.5–4.5 tons	6	54%	82%	31%	36%
Ducted, 5 tons and up	4	54%	82%	41%	26%

Every MSH LEGACY model in the market

MSH LEGACY’s 18 models with a known size and duct type, over the shape of the whole catalog.

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

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

Dots: 18 msh legacy 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 MSH LEGACY 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

No MSH LEGACY model keeps at least 70% of its heat at 5°F with all three cold-climate ratings.

All-around best

Top 5 MSH LEGACY 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
1N4H5S42KAAAMSH LEGACY · PERFORMANCE 15 SEER2 HPwith ducted air handler FXM4X48ALAlso listed as R4H5S42K*AAA	3.5 tons41,500 Btu/h · Ducted	49%	2.26	7.8	15.2	12.5	None	173	209693273	Ducted, 3.5–4.5 tons	60.7	49.3	72.0	Not a pick
2N4H5S30KAAAMSH LEGACY · PERFORMANCE 15 SEER2 HPwith ducted air handler FMA4X30ALAlso listed as R4H5S30K*AAA	2.5 tons28,200 Btu/h · Ducted	46%	2.18	8.1	15.2	12.5	None	169	209692125	Ducted, 2.5–3 tons	56.1	46.6	65.6	Not a pick
3N4H5S36KAAAMSH LEGACY · PERFORMANCE 15 SEER2 HPwith indoor coil EA4X37L21A and furnace 92MSN0802120AAlso listed as R4H5S36K*AAA	3 tons34,600 Btu/h · Ducted	46%	2.10	7.8	15.5	12.0	None	186	212338000	Ducted, 2.5–3 tons	54.3	41.8	66.8	Not a pick
4N4H5S60KAAAMSH LEGACY · PERFORMANCE 15 SEER2 HPwith ducted air handler FJMA460LDAlso listed as R4H5S60K*AAA	5 tons57,000 Btu/h · Ducted	50%	2.32	7.5	14.3	12.0	None	14	210998915	Ducted, 5 tons and up	54.0	51.6	56.3	Not a pick
5N4H5S48KAAAMSH LEGACY · PERFORMANCE 15 SEER2 HPwith ducted air handler FEVA0060+NAVA46001CKAlso listed as R4H5S48K*AAA	4 tons46,500 Btu/h · Ducted	47%	2.22	7.5	15.0	12.0	None	6	210538078	Ducted, 3.5–4.5 tons	53.0	43.2	62.9	Not a pick

Best model on each rating

MSH LEGACY’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	N4H5S42KAAAAlso listed as R4H5S42K*AAA	2.28	Ducted, 3.5–4.5 tons	83%	210838286
Capacity retention at 5°F	N4H5S60KAAAAlso listed as R4H5S60K*AAA	50%	Ducted, 5 tons and up	36%	210998915
HSPF2	N4H5S30KAAAAlso listed as R4H5S30K*AAA	8.1	Ducted, 2.5–3 tons	40%	209692125
SEER2	N4H5S42KAAAAlso listed as R4H5S42K*AAA	15.2	Ducted, 3.5–4.5 tons	40%	209693197
EER2	N4H5S42KAAAAlso listed as R4H5S42K*AAA	12.5	Ducted, 3.5–4.5 tons	92%	209693197
Heating capacity at 5°F	N4H5S60KAAAAlso listed as R4H5S60K*AAA	28,400 Btu/h	Ducted, 5 tons and up	31%	210998915

All 18 MSH LEGACY models in Explore

MSH LEGACY 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.

MSH LEGACY: 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	None on this board (0 of 2 models qualify)	41.0(50 is the typical model of its size class)N4H5S18KAAAwith indoor coil EA4X25L17A and furnace 80ESU0401712AAlso listed as R4H5S18K*AAA2 of 2 models have all five ratings · AHRI 210300397
Ducted, 2 tons	None on this board (0 of 2 models qualify)	52.7(50 is the typical model of its size class)N4H5S24KAAAwith ducted air handler FMA4X30ALAlso listed as R4H5S24K*AAA2 of 2 models have all five ratings · AHRI 210099429
Ducted, 2.5–3 tons	None on this board (0 of 4 models qualify)	56.1(50 is the typical model of its size class)N4H5S30KAAAwith ducted air handler FMA4X30ALAlso listed as R4H5S30K*AAA4 of 4 models have all five ratings · AHRI 209692125
Ducted, 3.5–4.5 tons	None on this board (0 of 6 models qualify)	60.7(50 is the typical model of its size class)N4H5S42KAAAwith ducted air handler FXM4X48ALAlso listed as R4H5S42K*AAA4 of 6 models have all five ratings · AHRI 209693273
Ducted, 5 tons and up	None on this board (0 of 4 models qualify)	54.0(50 is the typical model of its size class)N4H5S60KAAAwith ducted air handler FJMA460LDAlso listed as R4H5S60K*AAA2 of 4 models have all five ratings · AHRI 210998915

All-around board, every manufacturer

Newest MSH LEGACY certifications

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

The 5 most recently certified MSH LEGACY outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
R4H5S36KAAAMSH LEGACY · 15 SEER2 R SERIES R410A HPwith indoor coil EA4X48L24A and furnace *80MSU0802120A	3 tons34,600 Btu/h · Ducted	2.12	46%	7.8	15.2	None	186	212348325
N4H5S36KAAAMSH LEGACY · PERFORMANCE 15 SEER2 HPwith indoor coil EA4X48L24A and furnace *80MSU0802120A	3 tons34,600 Btu/h · Ducted	2.12	46%	7.8	15.2	None	186	212348324
R4H5S30KAAAMSH LEGACY · 15 SEER2 R SERIES R410A HPwith indoor coil EA4X37L17A and furnace *96MSN0601716A	2.5 tons27,200 Btu/h · Ducted	2.04	46%	7.5	14.3	None	169	212348235
N4H5S30KAAAMSH LEGACY · PERFORMANCE 15 SEER2 HPwith indoor coil EA4X37L17A and furnace *96MSN0601716A	2.5 tons27,200 Btu/h · Ducted	2.04	46%	7.5	14.3	None	169	212348234
R4H5S24KAAAMSH LEGACY · 15 SEER2 R SERIES R410A HPwith indoor coil EHD4X30AAL and furnace 92MSN1002122A	2 tons23,800 Btu/h · Ducted	2.10	47%	7.5	14.5	None	72	212348189

Shares hardware with

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

No shared hardware found for MSH LEGACY in this group.

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Manufacturers of a similar size, side by side.

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