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EL18KSLV-024-230A

EL18KSLV-024-230A is in the certified data.

Its certified full-speed heating output at 5°F is 20,000–23,400 Btu/h, 83–98% of its 47°F rating (tests at different compressor speeds), depending on the pairing.

Lennox · central heat pump

EL18KSLV-024-230A is in the certified data as of Sep 19, 2026. EL18KSLV-024-230A changed its certified heat output at 47°F on 70 pairings in the certified data between August 2025 and September 2026. The new figure is higher on 66 and lower on 4.

205 certified pairings with 148 different figures. See all

Heating at 47°F

24,000

19,800 at 17°F

20,800 at 5°F

Btu/h, certified

1.80 COP at 5°F

Cooling at 95°F

24,000

Btu/h, certified

EER2 12.0 at 95°F

SEER2 17.65

Heating and cooling by outdoor temperature

Certified heating at 5, 17, and 47°F and cooling at 95°F for EL18KSLV-024-230A, by outdoor temperature Heating: 20,800 Btu/h at 5°F, 19,800 Btu/h at 17°F, 24,000 Btu/h at 47°F. Cooling: 24,000 Btu/h at 95°F. The bars start at zero. Median of 2-ton central models: 19,000 Btu/h at 5°F, 19,200 Btu/h at 17°F, 24,000 Btu/h at 47°F, 24,000 Btu/h at 95°F. 0 5,000 10,000 15,000 20,000 25,000 Btu/h 20,800 5°F 19,800 17°F 24,000 47°F 24,000 95°F Outdoor temperature (°F)
  • Heating output
  • Cooling output
  • Median of 2-ton central models
  • Example heating load
  • Example cooling load
  • Frosting range, 17 to 45°F

This pairing delivers 24,000 Btu/h of heat at 47°F, 19,800 Btu/h at 17°F, and 20,800 Btu/h at 5°F, 87% of its 47°F rating. It delivers 24,000 Btu/h of cooling at 95°F. At 5°F that is 1,800 Btu/h above the example heating load of 19,000 Btu/h; at 95°F it is 14,500 Btu/h above the example cooling load of 9,500 Btu/h.

Each bar is a separate certified test, drawn at its outdoor temperature, starting at zero. The 47°F figure is at normal speed; the 17 and 5°F figures are at full speed. The short dark line on each bar is the median of 2-ton central models, one value per model. The shaded 17 to 45°F band is the frosting range: the outdoor coil can frost, and the unit pauses to defrost.

The dashed lines are example loads for a typical area of about 800 sq ft where winters reach 5°F: heating runs from 19,000 Btu/h at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 9,500 Btu/h at 95°F, at 1,000 sq ft per ton. A house in a hot climate or with large west-facing windows can need twice as much cooling. They are examples, not your building.

Calculate heating and cooling for your house

AHRI certificate 216769572 · listed by Lennox · certified Mar 20, 2025 · 5 pairings share these values

All rebate programs and their published thresholds

Certified output and power use

Certified output for the selected pairingThe four bars share one scale. The comparison is with the median of 2-ton central models. Heating tests run at 70°F indoors. The cooling test runs at 80°F indoors.
Outdoor temperature Certified outputBtu/h One scale vs class median COPat 5°F
5°Ffull speed 20,8006.10 kW +9% 1.80
17°Ffull speed 19,8005.80 kW +3% NR
47°Fnormal speed 24,0007.03 kW 0% NR
95°Fcooling, full load 24,0007.03 kW — NR

EER2 12.0 in that test. SEER2 17.65 over the modeled cooling season.

Power use at each temperature

Electrical input in the 5°F full-speed test
3.39kW
Electrical input in the 95°F cooling test
2.00kW
Seasonal average heating COP
2.64

These exclude backup resistance heat.

Updated Sep 19, 2026 · Methodology

How it compares with other 24,000 Btu heat pumps

2-ton central models

This pairing at 5°F
20,800 Btu/h
This unit at 5°F median across its pairings
20,800 Btu/h
Median of 2-ton central models at 5°F
19,000 Btu/h
Models in this group
565

This unit is above 66% of them, at number 192 of 565 by heat at 5°F. The middle half of the group runs 16,000 to 21,600 Btu/h.

This size class is defined by cooling capacity, so cooling is not compared here.

Closest models by heat at 5°F

Every 24,000 Btu (2-ton) unit, ranked by cooling efficiency, then heating efficiency

Certified values for EL18KSLV-024-230A

205 pairings · 205 AHRI certificates

This pairing is the one shown above. Under all pairings, a single figure means every pairing agrees and a range means the pairing decides.

This pairingAll pairings
Heating
Heat output at 47°F normal speed 24,000 Btu/h 23,800–24,800 Btu/h
Heat output at 17°F full speed 19,800 Btu/h 18,000–20,200 Btu/h
Heat output at 5°F full speed 20,800 Btu/h 20,000–23,400 Btu/h
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating 87%
COP at 5°F full speed 1.80 1.75–1.85
HSPF2 Region IV 9.0 8.5–10.0
Cooling
Cooling capacity at 95°F full-load test 24,000 Btu/h 23,200–24,200 Btu/h
EER2 at 95°F 12.0 11.0–12.3
SEER2 cooling season 17.65 15.2–18.5
Cooling at other temperatures NR NR
Equipment and listing
Refrigerant R-454B
Compressor Variable speed
Indoor unit CK40HT-24B-**+TDR 24 indoor units
FurnaceSL297UH040NV36B* 55 furnaces
Cold-climate designation EPA's designation, as published Yes On every pairing
ENERGY STAR Most Efficient EPA's designation, as published Yes On some pairings
Where it is sold US and Canada US and Canada
Model string as certified EL18KSLV-024-230A**

Pairings, by indoor-unit class

24 indoor units · 205 certified pairings

One row per indoor unit certified with this outdoor unit.

Air handler · 10 indoor units

  1. CK40HT-24B-**+TDR brand not stated 20,900 Btu/hat 5°F, full speed

    28 pairings, 27 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 24,000 Btu/h · Cold output 87% · COP 1.80

  2. CK40HT-30B-**+TDR brand not stated 20,800 Btu/hat 5°F, full speed

    28 pairings, 27 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 24,000 Btu/h · Cold output 87% · COP 1.80

  3. CK40[C,U]T-30B-**+TDR brand not stated 20,800 Btu/hat 5°F, full speed

    28 pairings, 27 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 23,800 Btu/h · Cold output 87% · COP 1.80

  4. CK40[C,U]T-36B-**+TDR brand not stated 20,700 Btu/hat 5°F, full speed

    28 pairings, 27 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 24,000 Btu/h · Cold output 87% · COP 1.85

  5. CK40HT-24A-**+TDR brand not stated 21,000 Btu/hat 5°F, full speed

    16 pairings, 15 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 23,600 Btu/h · Cold output 88% · COP 1.80

  6. CK40HT-30A-**+TDR brand not stated 20,800 Btu/hat 5°F, full speed

    16 pairings, 15 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 24,000 Btu/h · Cold output 87% · COP 1.85

  7. CK40[C,U]T-30A-**+TDR brand not stated 20,800 Btu/hat 5°F, full speed

    16 pairings, 15 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 23,800 Btu/h · Cold output 87% · COP 1.80

  8. CK40[C,U]T-36A-**+TDR brand not stated 20,600 Btu/hat 5°F, full speed

    16 pairings, 15 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 24,000 Btu/h · Cold output 86% · COP 1.85

  9. CK40DT-24B-**+TDR brand not stated 21,000 Btu/hat 5°F, full speed

    10 pairings, 9 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 23,800 Btu/h · Cold output 88% · COP 1.80

  10. CK40DT-24A-**+TDR brand not stated 21,000 Btu/hat 5°F, full speed

    5 pairings, 4 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 23,600 Btu/h · Cold output 88% · COP 1.80

Indoor units in the air handler class
Indoor unit Brand At 5°FBtu/h · full speed At 47°FBtu/h · normal speed At 95°FBtu/h · cooling Cold output% of 47°F rating COP 5°Ffull speed Cold climate Pairings
CK40HT-24B-**+TDR — 20,900 24,000 24,000 87% 1.80 Yes 28
CK40HT-30B-**+TDR — 20,800 24,000 24,000 87% 1.80 Yes 28
CK40[C,U]T-30B-**+TDR — 20,800 24,000 23,800 87% 1.80 Yes 28
CK40[C,U]T-36B-**+TDR — 20,700 24,000 24,000 87% 1.85 Yes 28
CK40HT-24A-**+TDR — 21,000 24,000 23,600 88% 1.80 Yes 16
CK40HT-30A-**+TDR — 20,800 24,000 24,000 87% 1.85 Yes 16
CK40[C,U]T-30A-**+TDR — 20,800 24,000 23,800 87% 1.80 Yes 16
CK40[C,U]T-36A-**+TDR — 20,600 24,000 24,000 86% 1.85 Yes 16
CK40DT-24B-**+TDR — 21,000 24,000 23,800 88% 1.80 Yes 10
CK40DT-24A-**+TDR — 21,000 24,000 23,600 88% 1.80 Yes 5

The share is heat output at 5°F divided by the 47°F rating.

Showing 10 of 24 indoor units All 205 certified pairings

Sold as, and units with identical certified values

Brands listing this model number

Model number as listed

  • EL18KSLV-024-230A** 205 pairings

Variants of the same model number

4 units in this group. Basis: identical certified values in the certified data. This grouping is our inference, not a field in the certified data.

3 of 4 shown.

What affects the price

We don't have prices. These things drive the cost.

  • The size of the unit, and the indoor equipment on the same certificate.
  • Whether existing ductwork is reused, altered, or replaced.
  • The electrical work: a circuit, a disconnect, and sometimes a panel change.
  • Refrigerant line length and how the outdoor unit is mounted.
  • Permits and inspection, which vary by municipality.
  • Removing and disposing of the old equipment.
  • Local labor rates and how busy the season is.
  • Rebates and tax credits, which change and have deadlines.

Product history

  • EL18KSLV-024-230A changed its certified heat output at 47°F on 70 pairings in the certified data between August 2025 and September 2026. The new figure is higher on 66 and lower on 4.
  • EL18KSLV-024-230A changed its certified heat output at 47°F on 4 pairings in the certified data between February 2025 and March 2025. The new figure is lower on all 4.
  • EL18KSLV-024-230A first appeared in the certified data between November 2024 and February 2025.

History and definitions

History

First certified record
Most recent certified record
Measurements reported
Mar 20, 2025
Status
In the certified data

Field definitions

COP
Heat delivered for each unit of electricity used. A COP of 2.5 gives 2.5 times the heat of an electric baseboard heater.
HSPF2
Heating efficiency over a typical season. Higher uses less electricity.
SEER2
Cooling efficiency over a typical season. Higher uses less electricity.
EER2
Cooling output divided by electrical input in the 95°F full-load test, in Btu/h per watt.
Cold output
Heat output at 5°F as a percentage of the 47°F rating.
% of rating at 17°F
Heat output at 17°F as a percentage of the 47°F rating.

NR not in the certified dataNC not cold-climate certifiedSP single pairing onlyVP varies by pairing; see the pairings tableWD withdrawn since the certified data was last read

Cite or print this page

Heat Pump List, “EL18KSLV-024-230A — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/el18kslv-024-230a