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      3.5-ton central heat pump · ELITE EL16KP1 Series

      Lennox EL16KP1-042-230A

      Below average cooling and heating efficiency for a 3.5-ton central heat pump, but not rated for cold climates.

      Ranks #100 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,323 a year to run in a mixed climate like Atlanta.

      SEER2
      15.5 Cooling efficiency over a season
      Below average · beats 15%
      HSPF2
      8.2 Heating efficiency over a season
      Below average · beats 28%
      EER2
      12.8 Cooling efficiency on a 95°F day
      Very good · beats 85%
      Heat at 5°F
      20,800 BTU/h49% of its 47°F output
      Average · beats 67%

      A good fit if…

      • You want a choice of indoor units - 85 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

      Specifications3.5 ton, R-454B
      General
      BrandLennox
      Outdoor unit modelEL16KP1-042-230A
      SeriesELITE EL16KP1 Series
      TypeCentral heat pump
      Nominal size3.5 ton
      CompressorVariable-speed units run longer at low powerSingle stage
      RefrigerantR-454B
      Connected (smart) capableNo
      On the market sinceOctober 1, 2024
      Last certifiedSeptember 16, 2026
      Cooling
      SEER2Seasonal efficiency, higher is better15.5 (range 15.2-15.5)
      EER2Efficiency at 95°F outdoors12.5-13.2
      Cooling capacity41,000-42,000 BTU/h
      Heating
      HSPF2Seasonal efficiency, higher is better7.8-8.2
      Capacity at 47°F38,500-40,500 BTU/h
      Capacity at 17°F24,600-25,800 BTU/h
      Capacity at 5°F19,300-20,800 BTU/h
      COP at 5°F2.0 = twice as efficient as a space heater2.00-2.14
      ENERGY STAR cold climateNo
      Heating output as it gets colder49% kept at 5°F

      Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CBK47UHET-042-230- at the standard test temperatures, in BTU/h:

      Certified matchups85 indoor units

      The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 85 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

      Indoor unitFurnaceSEER2EER2HSPF2Heat @5°FAHRI ref.
      CBK47UHET-042-230--15.512.88.220,000215740156
      CBK47UHET-048-230--15.512.88.220,400215740157
      CBK47UHET-048-460--15.512.88.220,400217595433
      CK40[C,U]T-49C-**+TDREL280UH110E60C*15.513.28.019,400215740205
      CK40[C,U]T-49C-**+TDREL280UH110XE60C*15.513.28.019,400215740206
      CK40[C,U]T-49C-**+TDRML180UH090E60C*15.513.08.019,700215740214
      CK40[C,U]T-49C-**+TDRML180UH110V60C*15.513.08.019,500215740216
      CK40[C,U]T-48C-**+TDRML180UH110V60C*15.513.07.820,400215740176
      CK40[C,U]T-48C-**+TDRML180UH110XE60C*15.513.07.820,400215740177
      CK40[C,U]T-48C-**+TDRML193UH110XE48C*15.513.07.820,200215740180
      CK40[C,U]T-48C-**+TDRML196UH110XE60C*15.512.87.820,400215740185
      CK40[C,U]T-48C-**+TDRSL280UH080NV60C*15.513.07.820,400215740188
      CK40[C,U]T-48C-**+TDRSL280UH090V60C*15.512.87.820,600215740189
      CK40[C,U]T-48C-**+TDRSL280UH090XV60C*15.512.87.820,600215740190
      CBK45UHVT-042-230--15.512.87.820,600215740154
      CK40[C,U]T-48C-**+TDREL280UH110E60C*15.513.07.820,400215740165
      CK40[C,U]T-48C-**+TDREL280UH110XE60C*15.513.07.820,400215740166
      CK40[C,U]T-48C-**+TDREL280UH110E48C*15.513.27.820,200215740164
      CK40[C,U]T-48C-**+TDREL196UH110XE60C*15.512.87.820,400215740163
      CK40[C,U]T-48C-**+TDRML180UH090E60C*15.513.07.820,600215740174
      CK40[C,U]T-48C-**+TDRML180UH110E60C*15.513.07.820,400215740175
      CK40[C,U]T-49C-**+TDREL196UH110XE60C*15.513.07.819,400215740203
      CK40[C,U]T-49C-**+TDREL280UH110E48C*15.513.07.819,300215740204
      CK40HT-42B-**+TDRML180UH090E48B*15.513.27.819,400215740272
      CK40HT-42B-**+TDRML180UH090XE48B*15.513.27.819,400215740274
      CK40[C,U]T-49C-**+TDREL297UH090XV48C*15.512.87.819,600215740209
      CK40[C,U]T-49C-**+TDREL297UH110XE60C*15.512.87.819,900215740211
      CK40[C,U]T-49C-**+TDRML180UH110E60C*15.513.07.819,500215740215
      CK40[C,U]T-49C-**+TDRML180UH110XE60C*15.513.07.819,500215740217
      CK40[C,U]T-49C-**+TDRML193UH110XE48C*15.513.07.819,300215740220
      CK40[C,U]T-49C-**+TDRML193UH110XE60C*15.513.07.819,600215740221
      CK40[C,U]T-49C-**+TDRML193UH090XE36C*15.512.87.819,400215740218
      CK40[C,U]T-49C-**+TDRML196UH110XE60C*15.512.87.819,500215740225
      CK40[C,U]T-49C-**+TDRML296UH090XV48C*15.512.87.819,600215740226
      CK40[C,U]T-49C-**+TDRML296UH110XV60C*15.512.87.819,600215740227
      CK40[C,U]T-49C-**+TDRSL280UH080NV60C*15.513.07.819,400215740228
      CK40[C,U]T-49C-**+TDRML196UH090XE60C*15.513.07.819,600215740224
      CK40[C,U]T-49C-**+TDRSL280UH090V60C*15.513.07.819,500215740229
      CK40[C,U]T-49C-**+TDRSL280UH090XV60C*15.513.07.819,500215740230
      CK40[C,U]T-49C-**+TDRSL280UH110V60C*15.512.87.819,600215740232
      CK40[C,U]T-49C-**+TDRSL280UH110XV60C*15.512.87.819,600215740233
      CK40[C,U]T-49C-**+TDRSL280UH100NV60C*15.512.87.819,600215740231
      CK40[C,U]T-49C-**+TDRSL297UH080NV48C*15.512.87.819,600215740234
      CK40[C,U]T-49C-**+TDRSLP99UH090XV48C*15.512.87.819,600215740237
      CK40[C,U]T-49C-**+TDRSLP99UH110XV60C*15.512.67.819,600215740239
      CK40HT-42B-**+TDREL280UH090E48B*15.513.07.819,500215740266
      CK40HT-42B-**+TDREL280UH090XE48B*15.513.07.819,500215740267
      CK40[C,U]T-49C-**+TDRML297UH110XV60C*15.512.87.819,400218691029
      CBK48MVT-048-230--15.212.68.220,400215740159
      CBK48MVT-042-230--15.212.68.120,200215740158
      CBK45UHVT-048-230--15.212.88.019,600215740155
      CK40[C,U]T-48C-**+TDRML193UH090XE36C*15.212.87.820,400215740178
      CK40[C,U]T-48C-**+TDRML193UH110XE60C*15.212.87.820,600215740181
      CK40[C,U]T-48C-**+TDRML196UH090XE60C*15.212.87.820,600215740184
      CK40[C,U]T-48C-**+TDRML296UH090XV48C*15.212.87.820,600215740186
      CK40[C,U]T-48C-**+TDRML296UH110XV60C*15.212.87.820,600215740187
      CK40[C,U]T-48C-**+TDRSL280UH100NV60C*15.212.87.820,600215740191
      CK40[C,U]T-48C-**+TDRSL280UH110V60C*15.212.67.820,600215740192
      CK40[C,U]T-48C-**+TDRSL280UH110XV60C*15.212.67.820,600215740193
      CK40[C,U]T-48C-**+TDRSL297UH080NV48C*15.212.87.820,600215740194
      Same unit, other model numbers1

      These model numbers have exactly the same certified ratings and matchups as the Lennox EL16KP1-042-230A: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

      Yearly running cost in 10 large cities$1,254-$3,104

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

      Questions6
      What is the SEER2 rating of the Lennox EL16KP1-042-230A?
      The Lennox EL16KP1-042-230A is rated at up to 15.5 SEER2 and 12.8 EER2 for cooling and up to 8.2 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 85 certified matchups SEER2 ranges from 15.2-15.5.
      Is the Lennox EL16KP1-042-230A 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 3.5-ton model.
      How much does the Lennox EL16KP1-042-230A cost to run per year?
      At its rated efficiency it costs about $1,254-$3,104 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,512 in Phoenix and $2,567 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
      Is the Lennox EL16KP1-042-230A the same as the Lennox ML14KP1-042-230A?
      Yes, as far as the certified ratings go. ENERGY STAR lists both model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
      Which indoor units work with the Lennox EL16KP1-042-230A?
      ENERGY STAR lists 85 certified combinations for this outdoor unit. The highest-rated ones use CBK47UHET-042-230-, CBK47UHET-048-230-, CBK47UHET-048-460-.
      What refrigerant does the Lennox EL16KP1-042-230A 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 $1,482/yrYou save $625/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 Lennox EL16KP1-042-230A
      3. What it replaces
      4. Price replace the example with your quote
      Heat pump, per year
      $1,482
      Current system, per year
      $2,107
      You save per year
      $625
      Payback
      24.8 years
      Net after 10 years
      -$9,248

      Cooling $942Heating $540Electricity used: 9,262 kWhSaved vs. a minimum-efficiency heat pump: $129

      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 3.5 ton models

      See all 138 3.5 ton central heat pumps, ranked

      Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 16, 2026. How we use the data.