Nortek Global HVAC heat pump efficiency: 75 outdoor models compared

Nortek Global HVAC has 75 heat pump outdoor models certified with this refrigerant group, in 280 AHRI-certified combinations. They are also sold as BROAN, FRIGIDAIRE, GIBSON, INTERTHERM, MAYTAG, MILLER, NORTEK, NORTEK GLOBAL HVAC LLC and 2 more names. Each model is compared with models of the same size and duct type, so the scores below do not depend on which sizes Nortek Global HVAC makes. Ranks are among manufacturers with a QMID on file and at least 10 scored models.

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ManufacturerData as of Oct 9, 2026updated Oct 10, 2026 · sources

Outdoor models: 75
AHRI certifications: 280
Efficiency index: 51%; Typical model vs same-size, same-type peers (55 models)
Meet CEE 2025: 38.7%; 29 models

How Nortek Global HVAC 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.

Nortek Global HVAC against every ranked manufacturerPeer scores, 0–100 · grey ticks: each ranked manufacturer · shaded: the middle half of Nortek Global HVAC’s own modelsNortek Global HVAC is strongest on capacity retention at 5°F (its typical model beats 64% of comparable models) and weakest on HSPF2 (38%).

Nortek Global HVAC
Middle half of its models
Other ranked manufacturers

Source: AHRI Directory, NEEP · as of Oct 9, 2026

Average peer percentile of Nortek Global HVAC’s models
Rating	Beats comparable models	Rank	Raw median
Efficiency index55 models scored	51%	20th of 27	—
COP at 5°F58 models scored	44%	23rd of 27	1.85
Capacity retention at 5°F55 models scored	64%	4th of 27	80%
HSPF291 models scored	38%	22nd of 27	8.2
SEER291 models scored	39%	22nd of 27	16.5
EER291 models scored	46%	21st of 27	11.0
Heating capacity at 5°F55 models scored	56%	10th of 27	14,500 Btu/h

Standards met

Share of Nortek Global HVAC’s models with at least one qualifying certification
Standard	Share	Models
CEE 2025 Tier 1 (Split ASHP)	38.7%	29
CEE 2026 Tier 1 (Split ASHP)	38.7%	29
CEE Advanced Tier (Split ASHP)	0%	0
Xcel Energy Colorado cold-climate ASHP (2025)	41.3%	31
DOE Cold Climate Heat Pump Challenge	0%	0
ENERGY STAR Cold Climate	29.3%	22

Sizes and duct types offered

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

Nortek Global HVAC’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

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

Source: AHRI Directory · as of Oct 9, 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	10	47%	45%	29%	34%
Ducted, 2 tons	7	52%	35%	45%	55%
Ducted, 2.5–3 tons	20	55%	37%	38%	36%
Ducted, 3.5–4.5 tons	13	58%	50%	41%	39%
Non-ducted, up to 1.5 tons	23	47%	45%	33%	35%
Non-ducted, 2 tons	7	53%	50%	42%	44%
Non-ducted, 2.5–3 tons	10	56%	46%	50%	45%
Non-ducted, 3.5–4.5 tons	1	45%	41%	14%	45%

Every Nortek Global HVAC model in the market

Nortek Global HVAC’s 91 models with a known size and duct type, over the shape of the whole catalog.

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

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

Dots: 91 nortek global hvac 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 9, 2026

Top Nortek Global HVAC 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 Nortek Global HVAC 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
1WHU09SZA21SWESTINGHOUSE · Hi UNIwith ductless indoor unit WHU09CTA21S	1 ton9,000 Btu/h · Non-ducted	92%	2.19	10.0	8,300	20.5	CEE 25CEE 26XcelES CC	2	207237535	Non-ducted, up to 1.5 tons	78.4
2WHU36SZA21SWESTINGHOUSEwith ducted air handler WHU36DHA21S	3 tons36,000 Btu/h · Ducted	76%	2.20	9.5	27,400	17.5	CEE 25CEE 26Xcel	2	207237544	Ducted, 2.5–3 tons	78.1
3WHU36SZA21SWESTINGHOUSEwith ductless indoor unit WHU36CTA21S	3 tons36,000 Btu/h · Non-ducted	74%	2.28	9.8	26,800	18.0	CEE 25CEE 26Xcel	2	207237539	Non-ducted, 2.5–3 tons	77.2
4GXH24(7.0)FMK4DH-1GIBSON · Flex Match	2 tons23,200 Btu/h · Non-ducted	90%	2.10	10.0	21,600	21.0	CEE 25CEE 26XcelES CC	3	210276801	Non-ducted, 2 tons	76.1
5WHZ09SZA21SWESTINGHOUSE · Hi UNIwith ductless indoor unit WHZ09WMA21S	1 ton9,000 Btu/h · Non-ducted	89%	2.05	10.5	8,050	27.5	CEE 25CEE 26XcelES CC	1	207337194	Non-ducted, up to 1.5 tons	75.7

All-around best

Top 5 Nortek Global HVAC 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
1WHZ09SZA21SWESTINGHOUSE · Hi UNIwith ductless indoor unit WHZ09WMA21S	1 ton9,000 Btu/h · Non-ducted	89%	2.05	10.5	27.5	15.5	CEE 25CEE 26XcelES CC	1	207337194	Non-ducted, up to 1.5 tons	85.4	75.7	95.1	75.7
2WHP36M4A21SWESTINGHOUSE · Hi MULTI Xtreme	2.5 tons32,000 Btu/h · Ducted	113%	1.84	8.9	19.5	12.0	CEE 25CEE 26XcelES CC	3	208404158	Ducted, 2.5–3 tons	78.6	69.2	88.0	69.2
3WHZ12SZA21SWESTINGHOUSE · Hi UNIwith ductless indoor unit WHZ12WMA21S	1 ton12,000 Btu/h · Non-ducted	81%	1.95	9.8	23.5	15.4	CEE 25CEE 26XcelES CC	1	207337195	Non-ducted, up to 1.5 tons	75.3	63.9	86.7	63.9
4WHP24M3A21SWESTINGHOUSE · Hi MULTI Xtreme	2 tons24,000 Btu/h · Ducted	100%	1.80	8.6	21.0	12.1	CEE 25CEE 26XcelES CC	3	208404156	Ducted, 2 tons	71.6	55.3	87.9	55.3
5GXH24(7.0)FMK4DH-1GIBSON · Flex Match	2 tons23,200 Btu/h · Non-ducted	90%	2.10	10.0	21.0	12.5	CEE 25CEE 26XcelES CC	3	210276801	Non-ducted, 2 tons	71.5	76.1	66.8	76.1

Best model on each rating

Nortek Global HVAC’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	WHU36SZA21S	2.28	Non-ducted, 2.5–3 tons	96%	207237539
Capacity retention at 5°F	WHP36M4A21S	113%	Non-ducted, 2.5–3 tons	99%	205446269
HSPF2	WHU36SZA21S	9.5	Ducted, 2.5–3 tons	83%	207237544
SEER2	WHZ09SZA21S	27.5	Non-ducted, up to 1.5 tons	96%	207337194
EER2	WHZ09SZA21S	15.5	Non-ducted, up to 1.5 tons	93%	207337194
Heating capacity at 5°F	WHP18M2A21S	18,000 Btu/h	Non-ducted, up to 1.5 tons	92%	205470408

All 75 Nortek Global HVAC models in Explore

Nortek Global HVAC 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.

Nortek Global HVAC: 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	55.9(50 is the typical model of its size class)WHU09SZA21Swith ducted air handler WHU09DHA21S5 of 10 models qualify · AHRI 207237540	57.7(50 is the typical model of its size class)WHU09SZA21Swith ducted air handler WHU09DHA21S5 of 10 models have all five ratings · AHRI 207237540
Ducted, 2 tons	68.1(50 is the typical model of its size class)WHM24SZA21Swith ducted air handler D(A,C,E)24D44+TDR4 of 6 models qualify · AHRI 214640590	71.6(50 is the typical model of its size class)WHP24M3A21S6 of 7 models have all five ratings · AHRI 208404156
Ducted, 2.5–3 tons	78.1(50 is the typical model of its size class)WHU36SZA21Swith ducted air handler WHU36DHA21S7 of 21 models qualify · AHRI 207237544	78.6(50 is the typical model of its size class)WHP36M4A21S7 of 20 models have all five ratings · AHRI 208404158
Ducted, 3.5–4.5 tons	73.0(50 is the typical model of its size class)WHM60SZA21Swith ducted air handler D(A,C,E)60B44+TDR4 of 13 models qualify · AHRI 214640596	65.5(50 is the typical model of its size class)WHM48SZA21Swith ducted air handler DC61A44-245R4 of 13 models have all five ratings · AHRI 213886028
Non-ducted, up to 1.5 tons	78.4(50 is the typical model of its size class)WHU09SZA21Swith ductless indoor unit WHU09CTA21S17 of 23 models qualify · AHRI 207237535	85.4(50 is the typical model of its size class)WHZ09SZA21Swith ductless indoor unit WHZ09WMA21S19 of 24 models have all five ratings · AHRI 207337194
Non-ducted, 2 tons	76.1(50 is the typical model of its size class)GXH24(7.0)FMK4DH-15 of 7 models qualify · AHRI 210276801	71.5(50 is the typical model of its size class)GXH24(7.0)FMK4DH-16 of 7 models have all five ratings · AHRI 210276801
Non-ducted, 2.5–3 tons	77.2(50 is the typical model of its size class)WHU36SZA21Swith ductless indoor unit WHU36CTA21S7 of 10 models qualify · AHRI 207237539	70.2(50 is the typical model of its size class)GXH42(12.3)FMK4DH-18 of 10 models have all five ratings · AHRI 210276799
Non-ducted, 3.5–4.5 tons	42.0(50 is the typical model of its size class)WHP42M5A21S1 of 1 models qualify · AHRI 208404161	No models in this size class

All-around board, every manufacturer

Newest Nortek Global HVAC certifications

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

The 5 most recently certified Nortek Global HVAC outdoor models
Outdoor model	Size · type	COP@5°F	Cap. 5/47	HSPF2	SEER2	Meets	Combos	AHRI ref.
WHM60SZA21SWESTINGHOUSEwith ducted air handler H,RG88960+TD	4.5 tons52,000 Btu/h · Ducted	1.62	63%	7.5	14.3	None	5	214731307
WHM24SZA21SWESTINGHOUSEwith ducted air handler H,RG81936+TD	2 tons22,000 Btu/h · Ducted	1.62	51%	7.5	14.3	None	9	214731306
PSH3BE4M1SP18KMAYTAG · MAYTAG PSH3BE SERIESwith ducted air handler B64BMM018K-A+TXV KIT	1.5 tons17,400 Btu/h · Ducted	—	—	7.5	14.3	None	5	214593387
CSH3BE4M1SP18KMAYTAG · MAYTAG CSH3BE SERIESwith ducted air handler B64BMM018K-A+TXV KIT	1.5 tons17,400 Btu/h · Ducted	—	—	7.5	14.3	None	5	214593381
WSH3BE4M1SP18KGIBSON · GIBSON WSH3BE SERIESwith ducted air handler B64BMM018K-A+TXV KIT	1.5 tons17,400 Btu/h · Ducted	—	—	7.5	14.3	None	10	214593375

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Manufacturers of a similar size, side by side.

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Nortek Global HVAC includes these brand names as listed in AHRI: BROAN, FRIGIDAIRE, GIBSON, INTERTHERM, MAYTAG, MILLER, NORTEK, NORTEK GLOBAL HVAC LLC, REZNOR, WESTINGHOUSE. Standards are checked against published thresholds; program rules beyond ratings are not checked.