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EL21KLV-048-230A

EL21KLV-048-230A is in the certified data.

Its certified full-speed heating output at 5°F is 29,000–39,500 Btu/h, 60–79% of its 47°F rating (tests at different compressor speeds), depending on the pairing.

Lennox · central heat pump

EL21KLV-048-230A is in the certified data as of Oct 24, 2026. EL21KLV-048-230A changed its certified heat output at 47°F on 11 pairings in the certified data between August 2025 and September 2026. The new figure is lower on all 11.

188 certified pairings with 145 different figures. See all

Heating at 47°F

43,500

36,400 at 17°F

33,200 at 5°F

Btu/h, certified

2.04 COP at 5°F

Cooling at 95°F

46,000

Btu/h, certified

EER2 12.0 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-048-230A, by outdoor temperature Heating: 33,200 Btu/h at 5°F, 36,400 Btu/h at 17°F, 43,500 Btu/h at 47°F. Cooling: 46,000 Btu/h at 95°F. The bars start at zero. Median of 4-ton central models: 36,400 Btu/h at 5°F, 35,000 Btu/h at 17°F, 48,000 Btu/h at 47°F, 48,000 Btu/h at 95°F. 0 20,000 40,000 60,000 Btu/h 33,200 5°F 36,400 17°F 43,500 47°F 46,000 95°F Outdoor temperature (°F)
  • Heating output
  • Cooling output
  • Median of 4-ton central models
  • Example heating load
  • Example cooling load
  • Frosting range, 17 to 45°F

This pairing delivers 43,500 Btu/h of heat at 47°F, 36,400 Btu/h at 17°F, and 33,200 Btu/h at 5°F, 76% of its 47°F rating. It delivers 46,000 Btu/h of cooling at 95°F. At 5°F that is 3,300 Btu/h short of the example heating load of 36,500 Btu/h; at 95°F it is 28,000 Btu/h above the example cooling load of 18,000 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 4-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 1,500 sq ft where winters reach 5°F: heating runs from 36,500 Btu/h at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 18,000 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 217443384 · listed by Lennox · certified Oct 27, 2025 · 4 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 4-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 33,2009.73 kW −9% 2.04
17°Ffull speed 36,40010.67 kW +4% NR
47°Fnormal speed 43,50012.75 kW −9% NR
95°Fcooling, full load 46,00013.48 kW — NR

EER2 12.0 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
4.77kW
Electrical input in the 95°F cooling test
3.83kW
Seasonal average heating COP
2.49

These exclude backup resistance heat.

Updated Oct 24, 2026 · Methodology

How it compares with other 48,000 Btu heat pumps

4-ton central models

This pairing at 5°F
33,200 Btu/h
This unit at 5°F median across its pairings
33,200 Btu/h
Median of 4-ton central models at 5°F
36,400 Btu/h
Models in this group
408

This unit is above 33% of them, at number 274 of 408 by heat at 5°F. The middle half of the group runs 25,350 to 46,000 Btu/h.

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

Closest models by heat at 5°F

Every 48,000 Btu (4-ton) unit, ranked by cooling efficiency, then heating efficiency

Certified values for EL21KLV-048-230A

188 pairings · 188 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 43,500 Btu/h 42,500–52,000 Btu/h
Heat output at 17°F full speed 36,400 Btu/h 34,200–44,500 Btu/h
Heat output at 5°F full speed 33,200 Btu/h 29,000–39,500 Btu/h
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating 76%
COP at 5°F full speed 2.04 1.88–2.20
HSPF2 Region IV 8.5 7.8–9.6
Cooling
Cooling capacity at 95°F full-load test 46,000 Btu/h 43,500–48,000 Btu/h
EER2 at 95°F 12.0 11.0–13.4
SEER2 cooling season 20.0 15.7–20.5
Cooling at other temperatures NR NR
Equipment and listing
Refrigerant R-454B
Compressor Variable speed
Indoor unit CK40HT-51/61C-**+TDR 20 indoor units
FurnaceSL280UH090V60C* 63 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 United States US and Canada
Model string as certified EL21KLV-048-230A**

Pairings, by indoor-unit class

20 indoor units · 188 certified pairings

One row per indoor unit certified with this outdoor unit.

Furnace paired · 2 indoor units

  1. CK40HT-48C-**+TDR brand not stated 33,800 Btu/hat 5°F, full speed

    28 pairings, 28 with a furnace · 47°F 44,000 Btu/h · 95°F cooling 46,000 Btu/h · Cold output 77% · COP 1.96

  2. CK40HT-48B-**+TDR brand not stated 33,400 Btu/hat 5°F, full speed

    5 pairings, 5 with a furnace · 47°F 48,000 Btu/h · 95°F cooling 46,500 Btu/h · Cold output 69% · COP 1.96

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
CK40HT-48C-**+TDR — 33,800 44,000 46,000 77% 1.96 Yes 28
CK40HT-48B-**+TDR — 33,400 48,000 46,500 69% 1.96 NC 5

Air handler · 8 indoor units

  1. CK40[C,U]T-50/60C-**+TDR brand not stated 29,400 Btu/hat 5°F, full speed

    38 pairings, 37 with a furnace · 47°F 48,000 Btu/h · 95°F cooling 46,500 Btu/h · Cold output 61% · COP 2.14

  2. CK40[C,U]T-60C-**+TDR brand not stated 34,200 Btu/hat 5°F, full speed

    38 pairings, 37 with a furnace · 47°F 47,000 Btu/h · 95°F cooling 47,000 Btu/h · Cold output 73% · COP 2.12

  3. CK40HT-51/61C-**+TDR brand not stated 33,200 Btu/hat 5°F, full speed

    27 pairings, 26 with a furnace · 47°F 43,500 Btu/h · 95°F cooling 46,000 Btu/h · Cold output 76% · COP 2.04

  4. CK40HT-60D-**+TDR brand not stated 31,400 Btu/hat 5°F, full speed

    15 pairings, 14 with a furnace · 47°F 45,500 Btu/h · 95°F cooling 47,000 Btu/h · Cold output 69% · COP 1.94

  5. CK40[C,U]T-60D-**+TDR brand not stated 34,000 Btu/hat 5°F, full speed

    13 pairings, 12 with a furnace · 47°F 47,500 Btu/h · 95°F cooling 47,500 Btu/h · Cold output 72% · COP 1.98

  6. CK40DT-48C-**+TDR brand not stated 32,400 Btu/hat 5°F, full speed

    12 pairings, 11 with a furnace · 47°F 50,500 Btu/h · 95°F cooling 46,500 Btu/h · Cold output 64% · COP 2.04

  7. CBK45UHET-048-230-** brand not stated 31,200 Btu/hat 5°F, full speed

    1 pairing · 47°F 45,000 Btu/h · 95°F cooling 46,500 Btu/h · Cold output 69% · COP 2.10

  8. CBK45UHET-060-230-** brand not stated 34,800 Btu/hat 5°F, full speed

    1 pairing · 47°F 44,000 Btu/h · 95°F cooling 47,000 Btu/h · Cold output 79% · COP 2.20

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
CK40[C,U]T-50/60C-**+TDR — 29,400 48,000 46,500 61% 2.14 NC 38
CK40[C,U]T-60C-**+TDR — 34,200 47,000 47,000 73% 2.12 Yes 38
CK40HT-51/61C-**+TDR — 33,200 43,500 46,000 76% 2.04 Yes 27
CK40HT-60D-**+TDR — 31,400 45,500 47,000 69% 1.94 Yes 15
CK40[C,U]T-60D-**+TDR — 34,000 47,500 47,500 72% 1.98 Yes 13
CK40DT-48C-**+TDR — 32,400 50,500 46,500 64% 2.04 NC 12
CBK45UHET-048-230-** — 31,200 45,000 46,500 69% 2.10 NC 1
CBK45UHET-060-230-** — 34,800 44,000 47,000 79% 2.20 Yes 1

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

Showing 10 of 20 indoor units All 188 certified pairings

Sold as, and units with identical certified values

Brands listing this model number

Model number as listed

  • EL21KLV-048-230A** 188 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-048-230A changed its certified heat output at 47°F on 11 pairings in the certified data between August 2025 and September 2026. The new figure is lower on all 11.
  • EL21KLV-048-230A changed its certified heat output at 47°F on 92 pairings in the certified data between June 2025 and September 2026. The new figure is higher on 24 and lower on 68.
  • EL21KLV-048-230A changed its certified SEER2 on 8 pairings in the certified data between June 2025 and August 2025. The new figure is higher on 1 and lower on 7.
  • EL21KLV-048-230A changed its certified HSPF2 on 5 pairings in the certified data between June 2025 and August 2025. The new figure is higher on 1 and lower on 4.
  • EL21KLV-048-230A changed its certified EER2 on 7 pairings in the certified data between June 2025 and August 2025. The new figure is lower on all 7.
  • EL21KLV-048-230A changed its certified COP at 5°F on 8 pairings in the certified data between June 2025 and August 2025. The new figure is lower on all 8.
  • EL21KLV-048-230A changed its certified cooling capacity at 95°F on 6 pairings in the certified data between June 2025 and August 2025. The new figure is lower on all 6.
  • EL21KLV-048-230A changed its certified heat output at 5°F on 7 pairings in the certified data between June 2025 and August 2025. The new figure is higher on all 7.
  • EL21KLV-048-230A changed its certified heat output at 47°F on at least 54 pairings in the certified data between June 2025 and August 2025. The new figure is higher on 35 and lower on 19.
  • EL21KLV-048-230A changed its certified heat output at 17°F on 7 pairings in the certified data between June 2025 and August 2025. The new figure is higher on all 7.
  • EL21KLV-048-230A 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
Oct 27, 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-048-230A — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/el21klv-048-230a