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      1.5-ton central heat pump · LX SERIES

      York YH518E2S11

      Below average cooling and heating efficiency for a 1.5-ton central heat pump, but not rated for cold climates.

      Ranks #138 of 170 1.5 ton central heat pumps for cooling efficiency, and costs about $561 a year to run in a mixed climate like Atlanta.

      SEER2
      16.0 Cooling efficiency over a season
      Below average · beats 26%
      HSPF2
      7.8 Heating efficiency over a season
      Below average · beats 5%
      EER2
      12.0 Cooling efficiency on a 95°F day
      Average · beats 64%
      Heat at 5°F
      9,100 BTU/h53% of its 47°F output
      Excellent · beats 92%

      A good fit if…

      • You want a choice of indoor units - 249 certified pairings.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • Cooling cost matters most - its SEER2 is below average for central heat pumps.
      • You mainly need heat - its HSPF2 is below average for central heat pumps.
      • Comfort and noise matter - a single-stage compressor runs only full-on or off.

      Calculate my running cost

      Details

      Specifications1.5 ton, R-454B
      General
      BrandYork
      Outdoor unit modelYH518E2S11
      SeriesLX SERIES
      TypeCentral heat pump
      Nominal size1.5 ton
      CompressorVariable-speed units run longer at low powerSingle stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceSeptember 24, 2024
      Last certifiedAugust 5, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better16.0 (range 15.2-16.0)
      EER2Efficiency at 95°F outdoors12.0-12.5
      Cooling capacity17,000-18,600 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8
      Capacity at 47°F16,100-17,000 BTU/h
      Capacity at 17°F10,700-11,300 BTU/h
      Capacity at 5°F8,700-9,100 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.26-2.34
      ENERGY STAR cold climateNo
      Heating output as it gets colder53% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CTM30B5ACS1 at the standard test temperatures, in BTU/h:

      Certified matchups249 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 249 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      CTM30B5ACS1Y82V080B12SMPC116.012.07.88,900217444661
      CTU30B5XCS1+TXVY82V080B12SMPC116.012.07.88,900217444660
      CTF30B5ACS1Y82V080B12SMPC116.012.07.88,900217444659
      CTM24B5ABS1Y82V080B12SMPC116.012.07.88,900217444658
      CTF24B5ABS1Y82V080B12SMPC116.012.07.88,900217444657
      CTM30B5ACS2Y82V080B12SMPC116.012.07.88,900218506909
      CTM24B5ABS2Y82V080B12SMPC116.012.07.88,900218506907
      CTU30B5XCS2+TXVY82V080B12SMPC116.012.07.88,900218506723
      CTF30B5ACS2Y82V080B12SMPC116.012.07.88,900218506720
      CTF24B5ABS2Y82V080B12SMPC116.012.07.88,900218506669
      JHE24B5AC2SS1-15.212.57.88,900215389737
      CTF30B5ACS1+JMC12B2SN1-15.212.57.88,900215739966
      CTU30B5XCS1+JMC12B2SN1+TXV-15.212.57.88,900215739967
      CTM30B5ACS1+JMC12B2SN1-15.212.57.89,000215739968
      CTM24B5ABS1+JME12B2SN1-15.212.57.88,800215739969
      CTM30B5ACS1+JMET08BS2N1-15.212.57.88,900215739970
      CTF30B5ACS1+JMET12BS2N1-15.212.57.88,900215739971
      CTU30B5XCS1+JMET12BS2N1+TXV-15.212.57.88,900215739972
      CTF24B5ABS1+JMET08BS2N1-15.212.57.88,900215739973
      CTM30B5ACS1+JME12B2SN1-15.212.57.88,900215739974
      CTF24B5ABS1+JME08B2SN1-15.212.57.88,800215739975
      CTM24B5ABS1+JMET12BS2N1-15.212.57.88,800215739976
      CTM30B5ACS1+JME08B2SN1-15.212.57.88,900215739977
      CTM24B5ABS1+JME08B2SN1-15.212.57.88,800215739978
      CTF30B5ACS1+JME12B2SN1-15.212.57.88,900215739980
      CTF24B5ABS1+JMC12B2SN1-15.212.57.88,900215739979
      CTU30B5XCS1+JME12B2SN1+TXV-15.212.57.88,900215739981
      CTM30B5ACS1+JMET12BS2N1-15.212.57.88,800215739982
      CTM24B5ABS1+JMET08BS2N1-15.212.57.88,900215739983
      CTF24B5ABS1+JMET12BS2N1-15.212.57.88,800215739984
      CTF30B5ACS1+JMET08BS2N1-15.212.57.89,000215739985
      CTU30B5XCS1+JMET08BS2N1+TXV-15.212.57.89,000215739986
      CTF30B5ACS1+JME08B2SN1-15.212.57.88,900215739987
      CTU30B5XCS1+JME08B2SN1+TXV-15.212.57.88,900215739988
      CTF24B5ABS1+JME12B2SN1-15.212.57.88,800215739989
      CTM24B5ABS1+JMC12B2SN1-15.212.57.88,900215739990
      CTM30B5ACS1TM8E080B12MP1115.212.57.89,100215820090
      CTM30B5ACS1TMLE080B12MP1115.212.57.89,100215820091
      CTM30B5ACS1TP9C080B12MP1315.212.57.89,000215820093
      CTM30B5ACS1YP9C080B12MP1315.212.57.89,000215820094
      CTM30B5ACS1TM9V080B12MP1215.212.57.89,000215820092
      CTF24A5ABS1TM8E060A12MP1115.212.57.89,000215820103
      CTU24A5XBS1+TXVTM8E060A12MP1115.212.57.89,000215820105
      CTF24A5ABS1TMLE060A12MP1115.212.57.89,000215820104
      CTU24A5XBS1+TXVTMLE060A12MP1115.212.57.89,000215820106
      CTF24B5ABS1TM8E080B12MP1115.212.57.89,100215820115
      CTF24B5ABS1TM9V080B12MP1215.212.57.89,000215820109
      CTF24B5ABS1TMLE080B12MP1115.212.57.89,100215820116
      CTF24B5ABS1TP9C080B12MP1315.212.57.89,000215820110
      CTF24B5ABS1YP9C080B12MP1315.212.57.89,000215820111
      CTF30B5ACS1TL9E060B12UH1115.212.57.89,100215820121
      CTM30B5ACS1Y81E080B12SMPS115.212.57.88,800215820120
      CTM30B5ACS1TM8E100B12MP1115.212.57.89,100215820124
      CTU30B5XCS1+TXVTL9E060B12UH1115.212.57.89,100215820122
      CTM30B5ACS1TMLE100B12MP1115.212.57.89,100215820125
      CTF30B5ACS1Y81E080B12SMPS115.212.57.88,800215820126
      CTU30B5XCS1+TXVY81E080B12SMPS115.212.57.88,800215820127
      CTM24A5ABS1Y81E060A12SMPS115.212.57.89,000215820131
      CTF24A5ABS1TM8V060A12MP1215.212.57.88,900215820133
      CTF24A5ABS1TMLV060A12MP1215.212.57.88,900215820134
      Yearly running cost in 10 large cities$499-$1,343

      At each state's average electricity price and the city's typical heating and cooling hours.

      Questions5
      What is the SEER2 rating of the York YH518E2S11?
      The York YH518E2S11 is rated at up to 16.0 SEER2 and 12.0 EER2 for cooling and up to 7.8 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 249 certified matchups SEER2 ranges from 15.2-16.0.
      Is the York YH518E2S11 good for cold climates?
      It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 1.5-ton model.
      How much does the York YH518E2S11 cost to run per year?
      At its rated efficiency it costs about $499-$1,343 a year in electricity in large U.S. cities, depending on climate and local rates - for example $617 in Phoenix and $1,122 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Which indoor units work with the York YH518E2S11?
      ENERGY STAR lists 249 certified combinations for this outdoor unit. The highest-rated ones use CTM30B5ACS1, CTU30B5XCS1+TXV, CTF30B5ACS1.
      What refrigerant does the York YH518E2S11 use?
      It uses R-454B.

      Running cost and savings

      Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

      Heat pump $612/yrYou save $258/yrSee details ↓
      1. Where you live
      Adjust heating and cooling hours

      Filled in from your city's climate. Change them if you run the system much more or less than usual.

      2. The heat pump York YH518E2S11
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $612
      Current system, per year
      $870
      You save per year
      $258
      Payback
      25.2 years
      Net after 10 years
      -$3,923

      Cooling $374Heating $238Electricity used: 3,827 kWhSaved vs. a minimum-efficiency heat pump: $54

      Estimates use the unit's rated SEER2 and HSPF2, full-load hours derived from NOAA 1991-2020 degree days, average residential electricity prices from the U.S. EIA (12 months to July 2026) and fuel prices from EIA (2025 for natural gas, week of 2026-10-05 for propane and heating oil). Very cold days that need backup heat are not modelled. Federal minimum for comparison: 14.3 SEER2 / 7.5 HSPF2.

      Similar 1.5 ton models

      See all 170 1.5 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of August 5, 2026. How we use the data.