What is the SEER2 rating of the Lennox EL18KSLV-060-230A?

The Lennox EL18KSLV-060-230A is rated at up to 18.3 SEER2 and 11.0 EER2 for cooling and up to 9.6 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 353 certified matchups SEER2 ranges from 15.2-18.3.

Is the Lennox EL18KSLV-060-230A good for cold climates?

Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 45,000 BTU/h at 5°F with a COP of 1.95, so it is still 2.0 times as efficient as electric resistance heat at that temperature.

How much does the Lennox EL18KSLV-060-230A cost to run per year?

At its rated efficiency it costs about $1,156-$3,145 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,433 in Phoenix and $2,633 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 Lennox EL18KSLV-060-230A?

ENERGY STAR lists 353 certified combinations for this outdoor unit. The highest-rated ones use CK40[C,U]T-49C-**+TDR, CBK45UHVT-048-230-, CBK48MVT-042-230-.

3.5-ton central heat pump · Elite EL18KSLV Series

Lennox EL18KSLV-060-230A

Very good cooling and heating efficiency for a 3.5-ton central heat pump, and certified for cold climates.

Ranks #23 of 138 3.5 ton central heat pumps for cooling efficiency, and costs about $1,311 a year to run in a mixed climate like Atlanta.

SEER2: 18.3 Cooling efficiency over a season
Very good · beats 74%
HSPF2: 9.6 Heating efficiency over a season
Very good · beats 76%
EER2: 11.0 Cooling efficiency on a 95°F day
Below average · beats 23%
Heat at 5°F: 45,000 BTU/h82% of its 47°F output
Below average · beats 27%

A good fit if…

You want low cooling bills - its SEER2 beats 74% of central heat pumps.
Your winters get properly cold - it is ENERGY STAR cold-climate certified, with 45,000 BTU/h at 5°F.
It will heat most of the year - its HSPF2 beats 76% of central heat pumps.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

Nothing stands out - its ratings have no weak spot for its class.

Calculate my running cost

Details

Specifications3.5 ton, R-454B

General
Brand	Lennox
Outdoor unit model	EL18KSLV-060-230A
Series	Elite EL18KSLV Series
Type	Central heat pump
Nominal size	3.5 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	October 29, 2024
Last certified	September 3, 2026
Cooling
SEER2Seasonal efficiency, higher is better	18.3 (range 15.2-18.3)
EER2Efficiency at 95°F outdoors	9.6-11.7
Cooling capacity	42,500-55,500 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.1-9.6
Capacity at 47°F	47,000-56,500 BTU/h
Capacity at 17°F	38,000-45,000 BTU/h
Capacity at 5°F	39,000-45,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.75-1.95
ENERGY STAR cold climate	Yes

Heating output as it gets colder82% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with CK40[C,U]T-49C-**+TDR at the standard test temperatures, in BTU/h:

Certified matchups353 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. The 60 highest-rated of 353 are shown. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	Furnace	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
CK40[C,U]T-49C-**+TDR · cold climate	EL297UH090XV48C*	18.3	11.0	9.0	39,000	217449976
CBK45UHVT-048-230- · cold climate	-	18.0	11.7	9.5	42,000	216581390
CBK48MVT-042-230- · cold climate	-	18.0	11.0	9.5	42,500	216618918
CBK47UHET-048-230- · cold climate	-	18.0	10.5	9.5	43,000	216705374
CBK43UHET-042-DV- · cold climate	-	17.9	10.7	9.6	45,000	218636323
CBK43UHET-048-DV- · cold climate	-	17.9	10.8	9.4	44,500	218636324
CK40HT-42C-**+TDR · cold climate	EL297UH090XV48C*	17.8	10.0	9.0	39,500	217450000
CK40[C,U]T-48C-**+TDR · cold climate	EL297UH090XV48C*	17.8	10.0	9.0	39,500	217449958
CK40[C,U]T-49C-**+TDR · cold climate	SL280UH090XV60C*	17.7	11.0	9.0	39,000	217449982
CK40[C,U]T-49C-**+TDR · cold climate	SL280UH090V60C*	17.7	11.0	9.0	39,000	217449981
CK40[C,U]T-49C-**+TDR · cold climate	SL280UH110V60C*	17.7	11.0	9.0	39,000	217189910
CK40[C,U]T-49C-**+TDR · cold climate	SL280UH110XV60C*	17.7	11.0	9.0	39,000	217449983
CBK45UHVT-042-230- · cold climate	-	17.6	11.0	9.0	43,000	216618916
CBK45UHET-042-230- · cold climate	-	17.6	10.5	9.0	43,000	216618915
CK40HT-42B-**+TDR · cold climate	ML180UH070V48B*	17.6	10.0	9.4	39,000	217449994
CK40[C,U]T-49C-**+TDR · cold climate	ML193UH110XE48C*	17.6	11.0	9.0	39,000	217449979
CBK47UHET-042-230- · cold climate	-	17.5	11.0	9.4	42,500	216705373
CBK45UHET-048-230- · cold climate	-	17.5	11.0	9.0	43,000	216618917
CBK48MVT-048-230- · cold climate	-	17.5	10.5	9.0	43,000	216618919
CK40[C,U]T-49C-**+TDR · cold climate	ML180UH110V60C*	17.5	11.0	9.0	39,000	217449985
CK40[C,U]T-49C-**+TDR · cold climate	SL280UH080NV60C*	17.5	11.0	9.0	39,000	217189911
CK40[C,U]T-49C-**+TDR · cold climate	SL280UH100NV60C*	17.5	11.0	9.0	39,000	217189912
CK40HT-48B-**+TDR · cold climate	ML180UH070V48B*	17.5	10.0	9.0	39,500	217450018
CK40[C,U]T-48B-**+TDR · cold climate	ML180UH070V48B*	17.5	10.0	9.0	39,500	217449952
CK40[C,U]T-49C-**+TDR · cold climate	SLP99UH110XV60C*	17.4	11.0	9.0	39,000	217189918
CK40[C,U]T-60C-**+TDR · cold climate	EL297UH090XV48C*	17.4	10.4	8.8	41,000	218672220
CK40[C,U]T-49C-**+TDR · cold climate	EL297UH110XV48C*	17.4	11.0	9.0	39,500	217449977
CK40[C,U]T-49C-**+TDR · cold climate	EL196UH090XE48C*	17.4	11.0	9.0	39,500	217449974
CK40[C,U]T-60C-**+TDR · cold climate	ML180UH110V60C*	17.4	10.0	8.5	40,000	217450065
CK40[C,U]T-49C-**+TDR · cold climate	ML193UH090XE48C*	17.3	11.0	9.0	39,500	217449978
CK40[C,U]T-49C-**+TDR · cold climate	SL297UH080NV60C*	17.3	11.0	9.0	39,500	216769605
CK40DT-48C-**+TDR · cold climate	ML196DF090XE48C*	17.3	10.0	9.0	39,000	217189953
CK40DT-48C-**+TDR · cold climate	ML193DF090XE48C*	17.3	10.0	9.0	39,000	217450043
CK40[C,U]T-49C-**+TDR · cold climate	EL297UH110XV60C*	17.2	10.0	9.0	39,500	216769606
CK40[C,U]T-49C-**+TDR · cold climate	ML180UH110E60C*	17.2	10.0	9.0	39,500	217189917
CK40[C,U]T-49C-**+TDR · cold climate	ML180UH090E60C*	17.2	11.0	9.0	39,500	217189916
CK40[C,U]T-49C-**+TDR · cold climate	ML180UH110XE60C*	17.2	10.0	9.0	39,500	217449984
CK40[C,U]T-49C-**+TDR · cold climate	EL297UH090XE48C*	17.2	11.0	9.0	39,000	217449975
CK40[C,U]T-49C-**+TDR · cold climate	ML297UH110XV60C*	17.2	10.0	9.0	39,500	218730769
CK40DT-48C-**+TDR · cold climate	ML180DF110E60C*	17.2	11.0	9.0	39,000	217189954
CK40DT-48C-**+TDR · cold climate	SL280DF110V60C*	17.2	10.0	9.0	39,500	217450045
CK40[C,U]T-49C-**+TDR · cold climate	ML296UH110XV60C*	17.2	10.0	9.0	39,500	217449990
CK40HT-48C-**+TDR · cold climate	EL297UH090XV48C*	17.2	10.0	9.0	39,500	217450024
CK40[C,U]T-60C-**+TDR · cold climate	ML180UH090E60C*	17.2	10.0	8.5	40,500	217189962
CK40[C,U]T-60C-**+TDR · cold climate	ML180UH110E60C*	17.2	10.0	8.5	40,500	217189963
CK40[C,U]T-60C-**+TDR · cold climate	ML180UH110XE60C*	17.2	10.0	8.5	40,500	217450064
CK40[C,U]T-49C-**+TDR · cold climate	EL297UH090XV60C*	17.1	10.0	9.0	39,500	216769607
CK40DT-48C-**+TDR · cold climate	SLP99DF090XV48C*	17.1	10.0	9.0	39,500	217189952
CK40[C,U]T-49C-**+TDR · cold climate	SLP99UH090XV60C*	17.1	10.0	9.0	39,500	217189919
CK40DT-48C-**+TDR · cold climate	EL297DF090XE48C*	17.1	10.0	9.0	39,000	217450042
CK40[C,U]T-49C-**+TDR · cold climate	ML297UH090XV60C*	17.1	10.0	9.0	39,500	218730770
CK40[C,U]T-48C-**+TDR · cold climate	SL280UH110V60C*	17.1	10.0	8.5	39,500	217189897
CK40[C,U]T-48C-**+TDR · cold climate	SL280UH090XV60C*	17.1	10.0	8.5	39,500	217449964
CK40[C,U]T-48C-**+TDR · cold climate	SL280UH110XV60C*	17.1	10.0	8.5	39,500	217449965
CK40[C,U]T-60C-**+TDR · cold climate	SL280UH090V60C*	17.1	10.0	8.5	40,000	217450061
CK40[C,U]T-60C-**+TDR · cold climate	SL280UH090XV60C*	17.1	10.0	8.5	40,000	217450062
CK40[C,U]T-48C-**+TDR · cold climate	SL280UH090V60C*	17.1	10.0	8.5	39,500	217449963
CK40[C,U]T-49C-**+TDR · cold climate	EL195UH080NE48C*	17.1	11.0	9.0	39,500	217189908
CK40DT-48C-**+TDR · cold climate	SL280DF090V60C*	17.1	10.0	9.0	39,500	217450044
CK40DT-60D-**+TDR · cold climate	ML180DF110E60C*	17.1	10.0	8.5	40,000	217189982

Yearly running cost in 10 large cities$1,156-$3,145

Phoenix, AZ$1,433/yr
Miami, FL$1,156/yr
Houston, TX$1,285/yr
Atlanta, GA$1,311/yr
Los Angeles, CA$1,278/yr
New York, NY$3,145/yr
Chicago, IL$2,556/yr
Denver, CO$2,127/yr
Seattle, WA$1,309/yr
Minneapolis, MN$2,633/yr

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

Questions5

What is the SEER2 rating of the Lennox EL18KSLV-060-230A?: The Lennox EL18KSLV-060-230A is rated at up to 18.3 SEER2 and 11.0 EER2 for cooling and up to 9.6 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 353 certified matchups SEER2 ranges from 15.2-18.3.
Is the Lennox EL18KSLV-060-230A good for cold climates?: Yes. At least one certified matchup meets the ENERGY STAR cold-climate criteria, delivering up to 45,000 BTU/h at 5°F with a COP of 1.95, so it is still 2.0 times as efficient as electric resistance heat at that temperature.
How much does the Lennox EL18KSLV-060-230A cost to run per year?: At its rated efficiency it costs about $1,156-$3,145 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,433 in Phoenix and $2,633 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 Lennox EL18KSLV-060-230A?: ENERGY STAR lists 353 certified combinations for this outdoor unit. The highest-rated ones use CK40[C,U]T-49C-**+TDR, CBK45UHVT-048-230-, CBK48MVT-042-230-.
What refrigerant does the Lennox EL18KSLV-060-230A 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 $1,426/yrYou save $944/yrSee details ↓

1. Where you live

StateCityElectricity ¢ per kWh

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.

Cooling hours full-load hours per yearHeating hours full-load hours per year

2. The heat pump Lennox EL18KSLV-060-230A

Find a model (fills in the ratings below)

SEER2 cooling efficiencyHSPF2 heating efficiencyCooling capacity BTU/hHeating capacity BTU/h

3. What it replaces

Current heatingFurnace efficiency (AFUE %)Gas price, $/thermCurrent coolingOld AC rating SEER2 (10 ≈ 15+ years old)

4. Price replace the example with your quote

Installed price, $Rebates and incentives, $ utility, state

Heat pump, per year: $1,426
Current system, per year: $2,369
You save per year: $944
Payback: 18.0 years
Net after 10 years: -$7,562

Cooling $866Heating $560Electricity used: 8,910 kWhSaved vs. a minimum-efficiency heat pump: $399

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

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Bosch BOVA-60RTB-M20S · cold climate18.5 SEER2 · 9.5 HSPF2
York HH860E2S12 · cold climate18.0 SEER2 · 8.5 HSPF2
Rheem RP18AZ48AJVC · cold climate19.0 SEER2 · 8.5 HSPF2
MDV MOX630-48HFN10-M3X · cold climate17.5 SEER2 · 9.5 HSPF2
Friedrich FRP18AZ48AJVC · cold climate19.0 SEER2 · 8.5 HSPF2
Midea MO1HE-H48B-2A · cold climate17.5 SEER2 · 9.5 HSPF2

See all 138 3.5 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of September 3, 2026. How we use the data.