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      2.5-ton central heat pump · LX SERIES

      Guardian RH630E2S11

      Average cooling efficiency and below average heating efficiency for a 2.5-ton central heat pump, but not rated for cold climates.

      Ranks #89 of 199 2.5 ton central heat pumps for cooling efficiency, and costs about $943 a year to run in a mixed climate like Atlanta.

      SEER2
      17.0 Cooling efficiency over a season
      Average · beats 49%
      HSPF2
      8.1 Heating efficiency over a season
      Below average · beats 20%
      EER2
      13.0 Cooling efficiency on a 95°F day
      Very good · beats 89%
      Heat at 5°F
      15,800 BTU/h52% of its 47°F output
      Excellent · beats 95%

      A good fit if…

      • You want a choice of indoor units - 38 certified pairings.

      Think twice if…

      • You often see nights below 0°F - it is not cold-climate certified.
      • You mainly need heat - its HSPF2 is below average for central heat pumps.

      Calculate my running cost

      Details

      Specifications2.5 ton, R-454B
      General
      BrandGuardian
      Also sold asEVCON
      Outdoor unit modelRH630E2S11
      SeriesLX SERIES
      TypeCentral heat pump
      Nominal size2.5 ton
      CompressorVariable-speed units run longer at low powerTwo-stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceApril 24, 2026
      Last certifiedJuly 15, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better17.0 (range 16.0-17.0)
      EER2Efficiency at 95°F outdoors11.7-13.0
      Cooling capacity29,600-30,800 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better8.0-8.1
      Capacity at 47°F29,000-29,800 BTU/h
      Capacity at 17°F18,800-19,800 BTU/h
      Capacity at 5°F15,200-15,800 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.26-2.40
      ENERGY STAR cold climateNo
      Heating output as it gets colder52% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CTF36C5ADS2 at the standard test temperatures, in BTU/h:

      Certified matchups38 indoor units

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

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      CTF36C5ADS2RL18080C16MPS117.013.08.115,200218530534
      CTF36C5ADS2RL18080C16MPS117.013.08.115,200218530533
      CTF36C5ADS2RL18100C16MPS117.012.58.115,400218530508
      CTF36C5ADS2RL18100C16MPS117.012.58.115,400218530507
      CTM36C5ADS2RL18100C16MPS117.012.58.115,400218530420
      CTM36C5ADS2RL18100C16MPS117.012.58.115,400218530419
      CTM36C5ADS2RL18080C16MPS117.013.08.115,200218530404
      CTM36C5ADS2RL18080C16MPS117.013.08.115,200218530403
      CTU36B5XDS2+TXVRL18080B12MPS117.012.58.115,400218530270
      CTU36B5XDS2+TXVRL18080B12MPS117.012.58.115,400218530269
      CTF36B5ADS2RL18080B12MPS117.012.58.115,400218530260
      CTF36B5ADS2RL18080B12MPS117.012.58.115,400218530259
      CTM36B5ADS2RL18100B12MPS116.012.58.115,200218530550
      CTM36B5ADS2RL18100B12MPS116.012.58.115,200218530549
      CTF36C5ADS2RG19080C16MPS116.012.58.115,400218530514
      CTF36C5ADS2RG19080C16MPS116.012.58.115,400218530513
      CTF36C5ADS2RL18080C20MPS116.012.58.115,200218530474
      CTF36C5ADS2RL18080C20MPS116.012.58.115,200218530473
      CTM36C5ADS2RL18080C20MPS116.012.58.115,200218530456
      CTM36C5ADS2RL18080C20MPS116.012.58.115,200218530455
      CTM36C5ADS2RG19080C16MPS116.012.58.115,400218530410
      CTM36C5ADS2RG19080C16MPS116.012.58.115,400218530409
      CTU36B5XDS2+TXVRG19060B12MPS116.011.78.115,800218530378
      CTU36B5XDS2+TXVRG19060B12MPS116.011.78.115,800218530377
      CTF36B5ADS2RG19060B12MPS116.011.78.115,800218530372
      CTF36B5ADS2RG19060B12MPS116.011.78.115,800218530371
      CTU36B5XDS2+TXVRG19080B12MPS116.011.78.115,800218530366
      CTU36B5XDS2+TXVRG19080B12MPS116.011.78.115,800218530365
      CTF36B5ADS2RG19080B12MPS116.011.78.115,800218530360
      CTF36B5ADS2RG19080B12MPS116.011.78.115,800218530359
      CTU36B5XDS2+TXVRL18100B12MPS116.012.58.115,200218530318
      CTU36B5XDS2+TXVRL18100B12MPS116.012.58.115,200218530317
      CTF36B5ADS2RL18100B12MPS116.012.58.115,200218530308
      CTF36B5ADS2RL18100B12MPS116.012.58.115,200218530307
      JHE30B5AD2SS1-16.012.58.015,400218416677
      JHE30B5AD2SS1-16.012.58.015,400218416676
      CTM36B5ADS2RG19060B12MPS116.011.78.015,800218530540
      CTM36B5ADS2RG19060B12MPS116.011.78.015,800218530539
      Yearly running cost in 10 large cities$830-$2,266

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

      Questions5
      What is the SEER2 rating of the Guardian RH630E2S11?
      The Guardian RH630E2S11 is rated at up to 17.0 SEER2 and 13.0 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 38 certified matchups SEER2 ranges from 16.0-17.0.
      Is the Guardian RH630E2S11 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 2.5-ton model.
      How much does the Guardian RH630E2S11 cost to run per year?
      At its rated efficiency it costs about $830-$2,266 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,030 in Phoenix and $1,898 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 Guardian RH630E2S11?
      ENERGY STAR lists 38 certified combinations for this outdoor unit. The highest-rated ones use CTF36C5ADS2, CTM36C5ADS2, CTU36B5XDS2+TXV.
      What refrigerant does the Guardian RH630E2S11 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 $1,025/yrYou save $509/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 Guardian RH630E2S11
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,025
      Current system, per year
      $1,534
      You save per year
      $509
      Payback
      22.6 years
      Net after 10 years
      -$6,411

      Cooling $621Heating $404Electricity used: 6,406 kWhSaved vs. a minimum-efficiency heat pump: $150

      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 2.5 ton models

      See all 199 2.5 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 15, 2026. How we use the data.