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ML15KSPV-018-230A

ML15KSPV-018-230A is in the certified data.

Its certified full-speed heating output at 5°F is 12,600–14,000 Btu/h, 70–76% of its 47°F rating (tests at different compressor speeds), depending on the pairing.

Lennox · central heat pump

All 152 certified Lennox models

ML15KSPV-018-230A is in the certified data as of Sep 19, 2026.

83 certified pairings with 64 different figures. See all

Heating at 47°F

18,500

15,500 at 17°F

13,900 at 5°F

Btu/h, certified

1.90 COP at 5°F

Cooling at 95°F

18,300

Btu/h, certified

EER2 10.4 at 95°F

SEER2 15.6

Heating and cooling by outdoor temperature

Certified heating at 5, 17, and 47°F and cooling at 95°F for ML15KSPV-018-230A, by outdoor temperature Heating: 13,900 Btu/h at 5°F, 15,500 Btu/h at 17°F, 18,500 Btu/h at 47°F. Cooling: 18,300 Btu/h at 95°F. The bars start at zero. Median of 1.5-ton central models: 11,200 Btu/h at 5°F, 12,600 Btu/h at 17°F, 18,000 Btu/h at 47°F, 18,000 Btu/h at 95°F. 0 5,000 10,000 15,000 20,000 Btu/h 13,900 5°F 15,500 17°F 18,500 47°F 18,300 95°F Outdoor temperature (°F)
  • Heating output
  • Cooling output
  • Median of 1.5-ton central models
  • Example heating load
  • Example cooling load
  • Frosting range, 17 to 45°F

This pairing delivers 18,500 Btu/h of heat at 47°F, 15,500 Btu/h at 17°F, and 13,900 Btu/h at 5°F, 75% of its 47°F rating. It delivers 18,300 Btu/h of cooling at 95°F. At 5°F that is 2,900 Btu/h above the example heating load of 11,000 Btu/h; at 95°F it is 12,800 Btu/h above the example cooling load of 5,500 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 1.5-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 450 sq ft where winters reach 5°F: heating runs from 11,000 Btu/h at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 5,500 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 218617502 · listed by Lennox · certified Jun 29, 2026 · 4 pairings share these values

Rebates where you live

Meets the recorded equipment thresholds of 54 programs in 34 states, provinces, or territories:Alabama (1), Arizona (1), California (3), Colorado (1), Connecticut (3), Idaho (2), Illinois (1), Kansas (1), Kentucky (1), Maryland (3), Massachusetts (3), Michigan (2), Minnesota (3), Mississippi (2), Nevada (1), New Hampshire (3), New Jersey (3), New York (4), North Carolina (1), Oregon (2), Rhode Island (3), South Carolina (1), Tennessee (1), Texas (1), Utah (1), Vermont (3), Washington (3), Wisconsin (1), Manitoba (1), New Brunswick (1), Newfoundland and Labrador (1), Nova Scotia (2), Ontario (1), Yukon (2).

All 54 programs by state and province

Alabama

Arizona

California

Colorado

Connecticut

Idaho

Illinois

Kansas

Kentucky

Maryland

Massachusetts

Michigan

Minnesota

Mississippi

Nevada

New Hampshire

New Jersey

New York

North Carolina

Oregon

Rhode Island

South Carolina

Tennessee

Texas

Utah

Vermont

Washington

Wisconsin

Manitoba

New Brunswick

Newfoundland and Labrador

Nova Scotia

Ontario

Yukon

Threshold comparisons use the unit’s median certified figures across its pairings, not the pairing selected above. Meeting these thresholds means the equipment may qualify; it does not guarantee approval. Service-area, installation, and product-list requirements also apply.

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 1.5-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 13,9004.07 kW +24% 1.90
17°Ffull speed 15,5004.54 kW +23% NR
47°Fnormal speed 18,5005.42 kW +3% NR
95°Fcooling, full load 18,3005.36 kW — NR

EER2 10.4 in that test. SEER2 15.6 over the modeled cooling season.

Power use at each temperature

Electrical input in the 5°F full-speed test
2.14kW
Electrical input in the 95°F cooling test
1.76kW
Seasonal average heating COP
2.43

These exclude backup resistance heat.

Updated Sep 19, 2026 · Methodology

How it compares with other 18,000 Btu heat pumps

1.5-ton central models

This pairing at 5°F
13,900 Btu/h
This unit at 5°F median across its pairings
13,900 Btu/h
Median of 1.5-ton central models at 5°F
11,200 Btu/h
Models in this group
243

This unit is above 56% of them, at number 107 of 243 by heat at 5°F. The middle half of the group runs 8,600 to 18,000 Btu/h.

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

Among 18,000 Btu central models, each by its median certified pairing, highest first: 5°F output as a share of its 47°F rating, 109th of 243 (tied); HSPF2, 149th of 254 (tied). Models without that figure are left out.

Similar ratings at 47°F

These central models share the nominal cooling size. Comparisons use each model’s median certified figures across pairings.

  • 5TWR5018A1: 18,300 Btu/h at 47°F (this model: 18,500); 8,900 Btu/h at 5°F (this model: 13,900).
  • AHU18HPV1BO: 18,000 Btu/h at 47°F (this model: 18,500); 20,400 Btu/h at 5°F (this model: 13,900).
  • MHP17L18P-**A: 18,000 Btu/h at 47°F (this model: 18,500); 8,700 Btu/h at 5°F (this model: 13,900).

Closest models by heat at 5°F

Every 18,000 Btu (1.5-ton) unit, ranked by cooling efficiency, then heating efficiency

Floor area at the cold test point

The median certified output of 13,900 Btu/h at 5°F matches the size calculator’s heating estimate for these floor areas, rounded to about 10 sq ft. Each range divides that output by the climate band’s heating rates.

Floor area by climate band and house condition
Climate bandHouse conditionBtu/h per sq ftApproximate sq ft
MildDrafty, little insulation24–42330–580
MildTypical16–26530–870
MildTight, well insulated10–18770–1,390
ColdDrafty, little insulation28–52270–500
ColdTypical18–30460–770
ColdTight, well insulated12–22630–1,160
Very coldDrafty, little insulation32–58240–430
Very coldTypical22–38370–630
Very coldTight, well insulated16–28500–870

This is an estimate, not a house-specific load calculation. Output stays at the 5°F test point for every band; it does not predict output at the band’s winter design temperature.

Certified values for ML15KSPV-018-230A

83 pairings · 83 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 18,500 Btu/h 18,000–18,600 Btu/h
Heat output at 17°F full speed 15,500 Btu/h 15,000–15,600 Btu/h
Heat output at 5°F full speed 13,900 Btu/h 12,600–14,000 Btu/h
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating 75%
COP at 5°F full speed 1.90 1.80–2.00
HSPF2 Region IV 8.3 8.1–8.8
Cooling
Cooling capacity at 95°F full-load test 18,300 Btu/h 17,900–18,900 Btu/h
EER2 at 95°F 10.4 10.2–11.0
SEER2 cooling season 15.6 15.2–17.2
Cooling at other temperatures NR NR
Equipment and listing
Refrigerant R-454B
Compressor Variable speed
Indoor unit CK40[C,U]T-24A-**+TDR 17 indoor units
FurnaceML180UH045E36A* 25 furnaces
Cold-climate designation EPA's designation, as published Yes On every pairing
ENERGY STAR Most Efficient EPA's designation, as published No On some pairings
Where it is sold US and Canada US and Canada
Model string as certified ML15KSPV-018-230A**

Across 83 certified pairings with 17 indoor models: heat at 5°F 12,600 Btu/h with CBK45UHVT-018-230-** to 14,000 Btu/h with CK40HT-24A-**+TDR; HSPF2 8.1 with CK40[C,U]T-30B-**+TDR to 8.8 with CBK43UHET-018-DV-**; SEER2 15.2 with CK40HT-30B-**+TDR to 17.2 with CK40HT-30A-**+TDR. Endpoints name one indoor model where recorded; the furnace pairing can also change the figures.

Pairings, by indoor-unit class

17 indoor units · 83 certified pairings

One row per indoor unit certified with this outdoor unit.

Furnace paired · 10 indoor units

  1. CK40HT-30B-**+TDR brand not stated 13,900 Btu/hat 5°F, full speed

    11 pairings, 11 with a furnace · 47°F 18,600 Btu/h · 95°F cooling 18,800 Btu/h · Cold output 75% · COP 1.90

  2. CK40HT-24A-**+TDR brand not stated 13,900 Btu/hat 5°F, full speed

    10 pairings, 10 with a furnace · 47°F 18,500 Btu/h · 95°F cooling 18,050 Btu/h · Cold output 76% · COP 1.90

  3. CK40HT-24B-**+TDR brand not stated 13,900 Btu/hat 5°F, full speed

    10 pairings, 10 with a furnace · 47°F 18,600 Btu/h · 95°F cooling 18,800 Btu/h · Cold output 75% · COP 1.90

  4. CK40HT-30A-**+TDR brand not stated 13,800 Btu/hat 5°F, full speed

    10 pairings, 10 with a furnace · 47°F 18,600 Btu/h · 95°F cooling 18,500 Btu/h · Cold output 74% · COP 2.00

  5. CK40[C,U]T-30A-**+TDR brand not stated 13,900 Btu/hat 5°F, full speed

    10 pairings, 10 with a furnace · 47°F 18,500 Btu/h · 95°F cooling 18,200 Btu/h · Cold output 75% · COP 1.90

  6. CK40[C,U]T-24A-**+TDR brand not stated 13,900 Btu/hat 5°F, full speed

    9 pairings, 9 with a furnace · 47°F 18,500 Btu/h · 95°F cooling 18,100 Btu/h · Cold output 75% · COP 1.90

  7. CK40[C,U]T-24B-**+TDR brand not stated 14,000 Btu/hat 5°F, full speed

    6 pairings, 6 with a furnace · 47°F 18,600 Btu/h · 95°F cooling 18,450 Btu/h · Cold output 75% · COP 1.90

  8. CK40[C,U]T-30B-**+TDR brand not stated 13,900 Btu/hat 5°F, full speed

    6 pairings, 6 with a furnace · 47°F 18,500 Btu/h · 95°F cooling 18,600 Btu/h · Cold output 75% · COP 1.90

  9. CK40DT-24A-**+TDR brand not stated 13,900 Btu/hat 5°F, full speed

    2 pairings, 2 with a furnace · 47°F 18,600 Btu/h · 95°F cooling 18,300 Btu/h · Cold output 75% · COP 1.90

  10. CK40DT-24B-**+TDR brand not stated 13,900 Btu/hat 5°F, full speed

    2 pairings, 2 with a furnace · 47°F 18,600 Btu/h · 95°F cooling 18,500 Btu/h · Cold output 75% · COP 1.90

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-30B-**+TDR — 13,900 18,600 18,800 75% 1.90 Yes 11
CK40HT-24A-**+TDR — 13,900 18,500 18,050 76% 1.90 Yes 10
CK40HT-24B-**+TDR — 13,900 18,600 18,800 75% 1.90 Yes 10
CK40HT-30A-**+TDR — 13,800 18,600 18,500 74% 2.00 Yes 10
CK40[C,U]T-30A-**+TDR — 13,900 18,500 18,200 75% 1.90 Yes 10
CK40[C,U]T-24A-**+TDR — 13,900 18,500 18,100 75% 1.90 Yes 9
CK40[C,U]T-24B-**+TDR — 14,000 18,600 18,450 75% 1.90 Yes 6
CK40[C,U]T-30B-**+TDR — 13,900 18,500 18,600 75% 1.90 Yes 6
CK40DT-24A-**+TDR — 13,900 18,600 18,300 75% 1.90 Yes 2
CK40DT-24B-**+TDR — 13,900 18,600 18,500 75% 1.90 Yes 2

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

Showing 10 of 17 indoor units All 83 certified pairings

Sold as, and units with identical certified values

Brands listing this model number

Model number as listed

  • ML15KSPV-018-230A** 83 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.

Other model numbers with identical certified values

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

2 of 3 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.

History and definitions

Other Merit ML15KSPV SERIES models by nominal cooling size: ML15KSPV-024-230A (24,000 Btu), ML15KSPV-030-230A (30,000 Btu).

History

First certified record
Most recent certified record
Measurements reported
Jun 29, 2026
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, “ML15KSPV-018-230A — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/ml15kspv-018-230a