Heat Pump List
Menu

Sections

Tools

EL21KLV-024-230A

EL21KLV-024-230A is in the certified data.

Its certified full-speed heating output at 5°F is 13,900–18,600 Btu/h, 57–78% of its 47°F rating (tests at different compressor speeds), depending on the pairing.

Lennox · central heat pump

EL21KLV-024-230A is in the certified data as of Oct 2, 2026. EL21KLV-024-230A changed its certified SEER2 on AHRI certificate 217121536 from 18.5 to 19.0 in the certified data between August 2025 and September 2026.

178 certified pairings with 137 different figures. See all

Heating at 47°F

24,400

20,800 at 17°F

17,100 at 5°F

Btu/h, certified

2.06 COP at 5°F

Cooling at 95°F

23,600

Btu/h, certified

EER2 13.0 at 95°F

SEER2 20.0

Heating and cooling by outdoor temperature

Certified heating at 5, 17, and 47°F and cooling at 95°F for EL21KLV-024-230A, by outdoor temperature Heating: 17,100 Btu/h at 5°F, 20,800 Btu/h at 17°F, 24,400 Btu/h at 47°F. Cooling: 23,600 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 10,000 20,000 30,000 Btu/h 17,100 5°F 20,800 17°F 24,400 47°F 23,600 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 24,400 Btu/h of heat at 47°F, 20,800 Btu/h at 17°F, and 17,100 Btu/h at 5°F, 70% of its 47°F rating. It delivers 23,600 Btu/h of cooling at 95°F. At 5°F that is 1,900 Btu/h short of the example heating load of 19,000 Btu/h; at 95°F it is 14,100 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 217443176 · listed by Lennox · certified Jul 3, 2025 · 2 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 17,1005.01 kW −10% 2.06
17°Ffull speed 20,8006.10 kW +8% NR
47°Fnormal speed 24,4007.15 kW +2% NR
95°Fcooling, full load 23,6006.92 kW — NR

EER2 13.0 in that test. SEER2 20.0 over the modeled cooling season.

Power use at each temperature

Electrical input in the 5°F full-speed test
2.43kW
Electrical input in the 95°F cooling test
1.82kW
Seasonal average heating COP
2.75

These exclude backup resistance heat.

Updated Oct 2, 2026 · Methodology

How it compares with other 24,000 Btu heat pumps

2-ton central models

This pairing at 5°F
17,100 Btu/h
This unit at 5°F median across its pairings
17,100 Btu/h
Median of 2-ton central models at 5°F
19,000 Btu/h
Models in this group
565

This unit is above 33% of them, at number 377 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 EL21KLV-024-230A

178 pairings · 178 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 24,400 Btu/h 23,600–27,400 Btu/h
Heat output at 17°F full speed 20,800 Btu/h 18,700–22,400 Btu/h
Heat output at 5°F full speed 17,100 Btu/h 13,900–18,600 Btu/h
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating 70%
COP at 5°F full speed 2.06 1.70–2.30
HSPF2 Region IV 9.4 8.1–10.2
Cooling
Cooling capacity at 95°F full-load test 23,600 Btu/h 21,600–24,000 Btu/h
EER2 at 95°F 13.0 11.2–13.5
SEER2 cooling season 20.0 15.2–21.0
Cooling at other temperatures NR NR
Equipment and listing
Refrigerant R-454B
Compressor Variable speed
Indoor unit CK40HT-30B-**+TDR 20 indoor units
FurnaceSL297UH040NV36B* 68 furnaces
Cold-climate designation EPA's designation, as published Yes On some pairings
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 EL21KLV-024-230A**

Pairings, by indoor-unit class

20 indoor units · 178 certified pairings

One row per indoor unit certified with this outdoor unit.

Furnace paired · 1 indoor unit

  1. CK40[C,M]T-30A-**+DF KIT brand not stated 16,700 Btu/hat 5°F, full speed

    4 pairings, 4 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 22,000 Btu/h · Cold output 70% · COP 1.79

Indoor units in the furnace paired 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
CK40[C,M]T-30A-**+DF KIT — 16,700 24,000 22,000 70% 1.79 Yes 4

Air handler · 9 indoor units

  1. CK40HT-30B-**+TDR brand not stated 17,100 Btu/hat 5°F, full speed

    33 pairings, 32 with a furnace · 47°F 24,400 Btu/h · 95°F cooling 23,800 Btu/h · Cold output 70% · COP 2.04

  2. CK40[C,U]T-30B-**+TDR brand not stated 17,700 Btu/hat 5°F, full speed

    32 pairings, 31 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 23,200 Btu/h · Cold output 73% · COP 2.10

  3. CK40[C,U]T-24B-**+TDR brand not stated 14,200 Btu/hat 5°F, full speed

    30 pairings, 29 with a furnace · 47°F 24,600 Btu/h · 95°F cooling 23,800 Btu/h · Cold output 58% · COP 1.74

  4. CK40HT-30A-**+TDR brand not stated 17,100 Btu/hat 5°F, full speed

    14 pairings, 13 with a furnace · 47°F 24,600 Btu/h · 95°F cooling 22,400 Btu/h · Cold output 70% · COP 2.06

  5. CK40[C,U]T-24A-**+TDR brand not stated 14,200 Btu/hat 5°F, full speed

    14 pairings, 13 with a furnace · 47°F 24,600 Btu/h · 95°F cooling 23,600 Btu/h · Cold output 58% · COP 1.74

  6. CK40[C,U]T-30A-**+TDR brand not stated 17,600 Btu/hat 5°F, full speed

    14 pairings, 13 with a furnace · 47°F 24,000 Btu/h · 95°F cooling 23,000 Btu/h · Cold output 73% · COP 2.10

  7. CK40DT-30/36B-**+TDR brand not stated 16,300 Btu/hat 5°F, full speed

    12 pairings, 11 with a furnace · 47°F 26,800 Btu/h · 95°F cooling 23,400 Btu/h · Cold output 61% · COP 2.02

  8. CK40DT-30/36C-**+TDR brand not stated 16,200 Btu/hat 5°F, full speed

    8 pairings, 7 with a furnace · 47°F 26,600 Btu/h · 95°F cooling 23,300 Btu/h · Cold output 61% · COP 2.02

  9. CK40HT-24A-**+TDR brand not stated 17,550 Btu/hat 5°F, full speed

    6 pairings, 5 with a furnace · 47°F 24,800 Btu/h · 95°F cooling 23,800 Btu/h · Cold output 71% · COP 1.97

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-30B-**+TDR — 17,100 24,400 23,800 70% 2.04 Yes 33
CK40[C,U]T-30B-**+TDR — 17,700 24,000 23,200 73% 2.10 Yes 32
CK40[C,U]T-24B-**+TDR — 14,200 24,600 23,800 58% 1.74 NC 30
CK40HT-30A-**+TDR — 17,100 24,600 22,400 70% 2.06 Yes 14
CK40[C,U]T-24A-**+TDR — 14,200 24,600 23,600 58% 1.74 NC 14
CK40[C,U]T-30A-**+TDR — 17,600 24,000 23,000 73% 2.10 Yes 14
CK40DT-30/36B-**+TDR — 16,300 26,800 23,400 61% 2.02 NC 12
CK40DT-30/36C-**+TDR — 16,200 26,600 23,300 61% 2.02 NC 8
CK40HT-24A-**+TDR — 17,550 24,800 23,800 71% 1.97 Yes 6

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

Showing 10 of 20 indoor units All 178 certified pairings

Sold as, and units with identical certified values

Brands listing this model number

Model number as listed

  • EL21KLV-024-230A** 178 pairings

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

  • EL21KLV-024-230A changed its certified SEER2 on AHRI certificate 217121536 from 18.5 to 19.0 in the certified data between August 2025 and September 2026.
  • EL21KLV-024-230A changed its certified EER2 on 3 pairings in the certified data between August 2025 and September 2026. The new figure is higher on all 3.
  • EL21KLV-024-230A changed its certified COP at 5°F on 2 pairings in the certified data between August 2025 and September 2026. The new figure is higher on all 2.
  • EL21KLV-024-230A changed its certified cooling capacity at 95°F on AHRI certificate 217121536 from 23,200 Btu/h to 23,400 Btu/h in the certified data between August 2025 and September 2026.
  • EL21KLV-024-230A changed its certified heat output at 5°F on 2 pairings in the certified data between August 2025 and September 2026. The new figure is lower on all 2.
  • EL21KLV-024-230A changed its certified heat output at 47°F on 3 pairings in the certified data between June 2025 and September 2026. The new figure is higher on all 3.
  • EL21KLV-024-230A changed its certified heat output at 17°F on AHRI certificate 217443086 from 19,300 Btu/h to 19,200 Btu/h in the certified data between August 2025 and September 2026.
  • EL21KLV-024-230A changed its certified heat output at 47°F on at least 161 pairings in the certified data between June 2025 and August 2025. The new figure is higher on all 161.
  • EL21KLV-024-230A first appeared in the certified data between March 2025 and May 2025.

History and definitions

History

First certified record
Most recent certified record
Measurements reported
Jul 3, 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, “EL21KLV-024-230A — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/el21klv-024-230a