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.

Rheem and York 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, Rheem scores higher on 4 of the 6 ratings.

Rheem
York
Other ranked manufacturers

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

Average peer percentile, raw median and rank among ranked manufacturers
Rating	Rheem	York
Efficiency index	54% (higher)median — · 16th ranked	51% (higher)median — · 21st ranked
COP at 5°F	69%median 2.10 · 4th ranked	69%median 2.20 · 5th ranked
Capacity retention at 5°F	59% (higher)median 73% · 10th ranked	50% (higher)median 69% · 18th ranked
HSPF2	49% (higher)median 8.1 · 18th ranked	37% (higher)median 7.7 · 23rd ranked
SEER2	44% (higher)median 16.0 · 21st ranked	38% (higher)median 15.2 · 24th ranked
EER2	46%median 10.6 · 20th ranked	57%median 11.0 · 9th ranked
Heating capacity at 5°F	58% (higher)median 22,000 Btu/h · 8th ranked	49% (higher)median 24,200 Btu/h · 17th ranked
Outdoor models	291	179
AHRI certifications	15,614	65,299

Share of models meeting each standard

Percent of each manufacturer’s models with a qualifying certification
Standard	Rheem	York
CEE 2025 Tier 1 (Split ASHP)	40.2%117 models	26.3%47 models
CEE 2026 Tier 1 (Split ASHP)	39.2%114 models	26.3%47 models
CEE Advanced Tier (Split ASHP)	5.5%16 models	0.6%1 models
Xcel Energy Colorado cold-climate ASHP (2025)	35.1%102 models	25.7%46 models
DOE Cold Climate Heat Pump Challenge	5.5%16 models	0.6%1 models
ENERGY STAR Cold Climate	15.5%45 models	2.2%4 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 · 9 groups where both have models

Rheem
York
All models of the group

Raw ratings are only placed side by side within one size and duct type, where they are comparable.

Source: AHRI Directory · as of Oct 9, 2026

Models per peer group · efficiency index within the group
Size and duct type	Rheem	York
Ducted, up to 1.5 tons	25 · index 40%	8 · index 42%
Ducted, 2 tons	32 · index 49%	17 · index 47%
Ducted, 2.5–3 tons	64 · index 51%	53 · index 51%
Ducted, 3.5–4.5 tons	85 · index 52%	71 · index 60%
Ducted, 5 tons and up	17 · index 69%	19 · index 50%
Non-ducted, up to 1.5 tons	59 · index 64%	9 · index 25%
Non-ducted, 2 tons	12 · index 64%	2 · index 41%
Non-ducted, 2.5–3 tons	20 · index 57%	6 · index 54%
Non-ducted, 3.5–4.5 tons	8 · index 50%	5 · index 46%
Non-ducted, 5 tons and up	None	2 · 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 type	RheemCold-climate score, best model	YorkCold-climate score, best model
Ducted, up to 1.5 tons	83.5(50 is the typical model of its size class) (higher)RO1HHZ12AJ8Swith ducted air handler RIMHHZ12AJ8S13 of 26 models qualify · AHRI 210824724	59.7(50 is the typical model of its size class)THF2B18S21with ducted air handler AE(D,N,U)+CM24D24+TDR7 of 8 models qualify · AHRI 214606310
Ducted, 2 tons	75.4(50 is the typical model of its size class) (higher)UOMH24FXZHJAlso listed as ROMH24FXZHJ, RO3HFZ24AJ1H14 of 31 models qualify · AHRI 10595427	60.6(50 is the typical model of its size class)THE2B24T21with ducted air handler AX242BTA10 of 16 models qualify · AHRI 211634285
Ducted, 2.5–3 tons	86.6(50 is the typical model of its size class) (higher)RO1HHZ30AJ8Swith ducted air handler RIMHHZ30AJ8S24 of 64 models qualify · AHRI 211781741	83.8(50 is the typical model of its size class)HMH72B341with indoor coil CM36B36+TDR and furnace TM9V120D20MP1222 of 53 models qualify · AHRI 211628039
Ducted, 3.5–4.5 tons	87.0(50 is the typical model of its size class) (higher)ROSH42VGSNwith ducted air handler RIDH42AXCJAlso sold as RUUD RO1HGZ42AJ8S23 of 85 models qualify · AHRI 207590035	77.7(50 is the typical model of its size class)RHP15048B21with ducted air handler L(E,G)M60A4Also sold as Champion Heating and Cooling THF2B48T2124 of 72 models qualify · AHRI 213612208
Ducted, 5 tons and up	None on this board (0 of 17 models qualify)	70.2(50 is the typical model of its size class)YMKE60BNJMFMO-X1 of 19 models qualify · AHRI 205739196
Non-ducted, up to 1.5 tons	95.0(50 is the typical model of its size class) (higher)RO1HGZ15AJ1Swith ductless indoor unit UIWHGZ15AJ1S45 of 59 models qualify · AHRI 210368107	64.2(50 is the typical model of its size class)DHS18CMB22S5 of 9 models qualify · AHRI 207616532
Non-ducted, 2 tons	87.3(50 is the typical model of its size class) (higher)RO1HHZ24AJ2Swith ductless indoor unit UIWHHZ24AJ2S10 of 12 models qualify · AHRI 210368117	66.1(50 is the typical model of its size class)DHS24CMB22S1 of 2 models qualify · AHRI 207616534
Non-ducted, 2.5–3 tons	89.6(50 is the typical model of its size class) (higher)RO1HHZ30AJ8Swith ductless indoor unit RIGHHZ30AJ8S15 of 20 models qualify · AHRI 211781745	60.8(50 is the typical model of its size class)YVAHP036B21S*Also sold as Coleman CVAHP036B21S5 of 6 models qualify · AHRI 203994967
Non-ducted, 3.5–4.5 tons	75.3(50 is the typical model of its size class) (higher)ROSH42VGSNwith ductless indoor unit RICH42AXCJAlso sold as RUUD UOSH42VGSN; also listed as RO1HGZ42AJ8S5 of 8 models qualify · AHRI 202245810	31.6(50 is the typical model of its size class)DHS42CMB22S1 of 5 models qualify · AHRI 207616540
Non-ducted, 5 tons and up	No models in this size class	None on this board (0 of 2 models qualify)

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 type	RheemAll-around score, best model	YorkAll-around score, best model
Ducted, up to 1.5 tons	82.7(50 is the typical model of its size class) (higher)RO1HHZ12AJ8Swith ducted air handler RIMHHZ12AJ8S24 of 25 models have all five ratings · AHRI 210824724	57.1(50 is the typical model of its size class)YH2F18SB21with ducted air handler AE*S+CM24C24+TDR7 of 7 models have all five ratings · AHRI 216437405
Ducted, 2 tons	83.6(50 is the typical model of its size class) (higher)RP18AZ24AJVCwith indoor coil RCFZ2421HEAAM and furnace R98VB085M521U28 of 31 models have all five ratings · AHRI 213163975	77.1(50 is the typical model of its size class)YMSJYH024BAAND-1with ducted air handler YMSJXH024BAAN--517 of 17 models have all five ratings · AHRI 217734524
Ducted, 2.5–3 tons	87.2(50 is the typical model of its size class) (higher)UP18AZ36AJVCwith indoor coil RCFZ6021SEAAM and furnace U802VA075317M44 of 65 models have all five ratings · AHRI 210589396	76.1(50 is the typical model of its size class)YMSJYH048BAAND-1with ducted air handler YMSJXH048BAAN--534 of 51 models have all five ratings · AHRI 217734526
Ducted, 3.5–4.5 tons	81.5(50 is the typical model of its size class)RP18AZ48AJVCwith ducted air handler RHMVZ6021SEACA46 of 84 models have all five ratings · AHRI 208552859	83.7(50 is the typical model of its size class) (higher)YZV48B21with indoor coil XAMC48HE3N1+CC and furnace TM9V100C16MP1248 of 73 models have all five ratings · AHRI 211207031
Ducted, 5 tons and up	70.9(50 is the typical model of its size class)RP15AZ60AJ2Nwith ducted air handler V,R60H210P309+AEFE5Also listed as WP15AZ60AJ2N5 of 18 models have all five ratings · AHRI 213088753	75.1(50 is the typical model of its size class) (higher)YMKE60BNJMFMO-X12 of 20 models have all five ratings · AHRI 205739196
Non-ducted, up to 1.5 tons	96.4(50 is the typical model of its size class) (higher)RO1HGZ09AJ1Swith ductless indoor unit UIWHGZ09AJ1S49 of 59 models have all five ratings · AHRI 210368099	50.6(50 is the typical model of its size class)DHS18CMB22S9 of 9 models have all five ratings · AHRI 207616532
Non-ducted, 2 tons	86.5(50 is the typical model of its size class) (higher)RO1HHZ24AJ8Swith ductless indoor unit RIGHHZ24AJ8S12 of 12 models have all five ratings · AHRI 211781744	55.4(50 is the typical model of its size class)DHS24CMB22S2 of 2 models have all five ratings · AHRI 207616534
Non-ducted, 2.5–3 tons	79.2(50 is the typical model of its size class) (higher)UOMH36FXZHJAlso listed as ROMH36FXZHJ, RO4HFZ36AJ1H19 of 20 models have all five ratings · AHRI 10595431	74.6(50 is the typical model of its size class)YVAHP036B21S*Also sold as Coleman CVAHP036B21S5 of 6 models have all five ratings · AHRI 203994967
Non-ducted, 3.5–4.5 tons	65.1(50 is the typical model of its size class)ROSH42VGSNwith ductless indoor unit RICH42AXCJAlso sold as RUUD UOSH42VGSN; also listed as RO1HGZ42AJ8S8 of 8 models have all five ratings · AHRI 202245810	67.0(50 is the typical model of its size class) (higher)YVAHP048B21S*Also sold as Coleman CVAHP048B21S3 of 5 models have all five ratings · AHRI 203994968
Non-ducted, 5 tons and up	No models in this size class	68.5(50 is the typical model of its size class)YVAHP060B21S*2 of 2 models have all five ratings · AHRI 203994964

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
Rating	Rheem	York
COP at 5°F	beats 100% · 3.15RP15AZ24AJ2NDucted, 2 tons	beats 100% · 3.44THE2B42T21Ducted, 2.5–3 tons
Capacity retention at 5°F	beats 100% · 149%ROSH09AFFHJNon-ducted, up to 1.5 tons	beats 100% · 149%THE2B18S21Ducted, up to 1.5 tons
HSPF2	beats 98% · 13.4RO1HGZ09AJ1SNon-ducted, up to 1.5 tons	beats 98% · 10.0YVAHP048B21S*Also sold as Coleman CVAHP048B21SDucted, 3.5–4.5 tons
SEER2	beats 100% · 33.1RO1HGZ09AJ1SNon-ducted, up to 1.5 tons	beats 96% · 18.0YMKE60BNJMFMO-XDucted, 5 tons and up
EER2	beats 100% · 18.0RO1HGZ09AJ1SNon-ducted, up to 1.5 tons	beats 100% · 16.7YVAHP048B21S*Also sold as Coleman CVAHP048B21SNon-ducted, 3.5–4.5 tons
Heating capacity at 5°F	beats 100% · 43,500 Btu/hRP18AZ36AJVCAlso sold as RUUD UP18AZ36AJVCDucted, 2.5–3 tons	beats 99% · 21,800 Btu/hDHS18CMB22SNon-ducted, up to 1.5 tons

More comparisons

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Rheem vs York heat pumps