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4SHP18LX136P

4SHP18LX136P is in the certified data.

Its certified full-speed heating output at 5°F is 10,900–19,600 Btu/h, 46–67% of its 47°F rating (tests at different compressor speeds), depending on the pairing.

AirEase and Armstrong Air · central heat pump

All 44 certified AirEase models · All 44 certified Armstrong Air models

4SHP18LX136P is in the certified data as of Sep 19, 2026. 4SHP18LX136P changed its certified heat output at 47°F on 80 pairings in the certified data between August 2025 and September 2026. The new figure is higher on 36 and lower on 44.

319 certified pairings with 74 different figures. See all

Heating at 47°F

23,200

15,900 at 17°F

15,200 at 5°F

Btu/h, certified

1.94 COP at 5°F

Cooling at 95°F

23,200

Btu/h, certified

EER2 12.3 at 95°F

SEER2 19.0

Heating and cooling by outdoor temperature

Certified heating at 5, 17, and 47°F and cooling at 95°F for 4SHP18LX136P, by outdoor temperature Heating: 15,200 Btu/h at 5°F, 15,900 Btu/h at 17°F, 23,200 Btu/h at 47°F. Cooling: 23,200 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 40,000 Btu/h 15,200 5°F 15,900 17°F 23,200 47°F 23,200 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 23,200 Btu/h of heat at 47°F, 15,900 Btu/h at 17°F, and 15,200 Btu/h at 5°F, 66% of its 47°F rating. It delivers 23,200 Btu/h of cooling at 95°F. At 5°F that is 3,800 Btu/h short of the example heating load of 19,000 Btu/h; at 95°F it is 13,700 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 210740095 · listed by Armstrong Air · certified Jun 3, 2026 · 12 pairings share these values

Rebates where you live

Meets the recorded equipment thresholds of 47 programs in 28 states, provinces, or territories:Alabama (1), Arizona (1), California (2), Colorado (1), Delaware (2), Idaho (2), Illinois (1), Kansas (1), Kentucky (1), Maryland (3), Michigan (2), Minnesota (2), Mississippi (2), Nevada (1), New Hampshire (1), New Jersey (7), New York (4), North Carolina (1), Oregon (2), Pennsylvania (3), South Carolina (1), Tennessee (1), Texas (3), Utah (1), Vermont (3), Washington (2), Wisconsin (1), Newfoundland and Labrador (1).

All 47 programs by state and province

Alabama

Arizona

California

Colorado

Delaware

Idaho

Illinois

Kansas

Kentucky

Maryland

Michigan

Minnesota

Mississippi

Nevada

New Hampshire

New Jersey

New York

North Carolina

Oregon

Pennsylvania

South Carolina

Tennessee

Texas

Utah

Vermont

Washington

Wisconsin

Newfoundland and Labrador

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 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 15,2004.45 kW −20% 1.94
17°Ffull speed 15,9004.66 kW −17% NR
47°Fnormal speed 23,2006.80 kW −3% NR
95°Fcooling, full load 23,2006.80 kW — NR

EER2 12.3 in that test. SEER2 19.0 over the modeled cooling season.

Power use at each temperature

Electrical input in the 5°F full-speed test
2.30kW
Electrical input in the 95°F cooling test
1.89kW
Seasonal average heating COP
2.29

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
15,200 Btu/h
This unit at 5°F median across its pairings
15,200 Btu/h
Median of 2-ton central models at 5°F
19,000 Btu/h
Models in this group
565

This unit is above 24% of them, at number 431 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.

Among 24,000 Btu central models, each by its median certified pairing, highest first: 5°F output as a share of its 47°F rating, 431st of 565; HSPF2, 442nd of 578 (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.

  • ML15KSPV-024-230A: The same 23,600 Btu/h rating at 47°F; 18,200 Btu/h at 5°F (this model: 15,200).
  • 27VNA024A*030*: The same 23,600 Btu/h rating at 47°F; HSPF2 9.0 (this model: 8.1).
  • 50NR-B24---30: 23,400 Btu/h at 47°F (this model: 23,600); 8,400 Btu/h at 5°F (this model: 15,200).

Closest models by heat at 5°F

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

Floor area at the cold test point

The median certified output of 15,200 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 insulation24–42360–630
MildTypical16–26580–950
MildTight, well insulated10–18840–1,520
ColdDrafty, little insulation28–52290–540
ColdTypical18–30510–840
ColdTight, well insulated12–22690–1,270
Very coldDrafty, little insulation32–58260–480
Very coldTypical22–38400–690
Very coldTight, well insulated16–28540–950

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 4SHP18LX136P

319 pairings · 319 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 23,200 Btu/h 22,000–35,000 Btu/h
Heat output at 17°F full speed 15,900 Btu/h 14,900–23,600 Btu/h
Heat output at 5°F full speed 15,200 Btu/h 10,900–19,600 Btu/h
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating 66%
COP at 5°F full speed 1.94 1.82–2.22
HSPF2 Region IV 7.8 7.8–8.5
Cooling
Cooling capacity at 95°F full-load test 23,200 Btu/h 22,000–35,000 Btu/h
EER2 at 95°F 12.3 11.0–12.3
SEER2 cooling season 19.0 16.0–19.0
Cooling at other temperatures NR NR
Equipment and listing
Refrigerant R-410A
Compressor Variable speed
Indoor unit EA(C;U)1P24B+TDR+TXV 46 indoor units
FurnaceA96US2V070B12 33 furnaces
Cold-climate designation EPA's designation, as published NC NC
ENERGY STAR Most Efficient EPA's designation, as published No On no pairings
Where it is sold US and Canada US and Canada
Model string as certified 4SHP18LX136P

Across 319 certified pairings with 46 indoor models: heat at 5°F 10,900 Btu/h with 7EC24BX-0*+TDR to 19,600 Btu/h with 7EH36CX-0*+TDR; HSPF2 7.8 with 7EC24BX-0*+TDR to 8.5 with 7AH1AC18PX-0*; SEER2 16.0 with 7EC30BX-0*+TDR to 19.0 with 7AH2AE30PX-0*. Endpoints name one indoor model where recorded; the furnace pairing can also change the figures.

Pairings, by indoor-unit class

46 indoor units · 319 certified pairings

One row per indoor unit certified with this outdoor unit.

Furnace paired · 10 indoor units

  1. E*1P23B+TDR+TXV brand not stated 14,300 Btu/hat 5°F, full speed

    36 pairings, 18 with a furnace · 47°F 23,000 Btu/h · 95°F cooling 23,000 Btu/h · Cold output 62% · COP 1.90

  2. 7EH30BX-0*+TDR brand not stated 15,000 Btu/hat 5°F, full speed

    32 pairings, 16 with a furnace · 47°F 23,600 Btu/h · 95°F cooling 23,600 Btu/h · Cold output 63% · COP 2.03

  3. EAH1P30B+TDR+TXV brand not stated 15,000 Btu/hat 5°F, full speed

    32 pairings, 16 with a furnace · 47°F 23,600 Btu/h · 95°F cooling 23,600 Btu/h · Cold output 63% · COP 2.03

  4. 7EC24BX-0*+TDR brand not stated 15,300 Btu/hat 5°F, full speed

    20 pairings, 10 with a furnace · 47°F 23,200 Btu/h · 95°F cooling 23,200 Btu/h · Cold output 66% · COP 1.94

  5. EAC4X24B+TDR brand not stated 15,300 Btu/hat 5°F, full speed

    20 pairings, 10 with a furnace · 47°F 23,200 Btu/h · 95°F cooling 23,200 Btu/h · Cold output 66% · COP 1.94

  6. 7EC30BX-0*+TDR brand not stated 15,100 Btu/hat 5°F, full speed

    16 pairings, 8 with a furnace · 47°F 23,700 Btu/h · 95°F cooling 23,700 Btu/h · Cold output 63% · COP 1.97

  7. EAC4X30B+TDR brand not stated 15,100 Btu/hat 5°F, full speed

    16 pairings, 8 with a furnace · 47°F 23,700 Btu/h · 95°F cooling 23,700 Btu/h · Cold output 63% · COP 1.97

  8. ED1P24B+TDR+TXV brand not stated 14,800 Btu/hat 5°F, full speed

    14 pairings, 7 with a furnace · 47°F 22,800 Btu/h · 95°F cooling 22,800 Btu/h · Cold output 65% · COP 1.82

  9. EA(C,U)1P30B+TDR+TXV brand not stated 14,950 Btu/hat 5°F, full speed

    12 pairings, 6 with a furnace · 47°F 23,700 Btu/h · 95°F cooling 23,700 Btu/h · Cold output 63% · COP 2.02

  10. 7EH36CX-0*+TDR brand not stated 19,600 Btu/hat 5°F, full speed

    10 pairings, 5 with a furnace · 47°F 35,000 Btu/h · 95°F cooling 35,000 Btu/h · Cold output 56% · COP 2.22

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
E*1P23B+TDR+TXV — 14,300 23,000 23,000 62% 1.90 NC 36
7EH30BX-0*+TDR — 15,000 23,600 23,600 63% 2.03 NC 32
EAH1P30B+TDR+TXV — 15,000 23,600 23,600 63% 2.03 NC 32
7EC24BX-0*+TDR — 15,300 23,200 23,200 66% 1.94 NC 20
EAC4X24B+TDR — 15,300 23,200 23,200 66% 1.94 NC 20
7EC30BX-0*+TDR — 15,100 23,700 23,700 63% 1.97 NC 16
EAC4X30B+TDR — 15,100 23,700 23,700 63% 1.97 NC 16
ED1P24B+TDR+TXV — 14,800 22,800 22,800 65% 1.82 NC 14
EA(C,U)1P30B+TDR+TXV — 14,950 23,700 23,700 63% 2.02 NC 12
7EH36CX-0*+TDR — 19,600 35,000 35,000 56% 2.22 NC 10

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

Showing 10 of 46 indoor units All 319 certified pairings

Sold as, and units with identical certified values

Brands listing this model number

Other brands that list these model numbers

Model number as listed

  • 4SHP18LX136P 319 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

  • 4SHP18LX136P changed its certified heat output at 47°F on 80 pairings in the certified data between August 2025 and September 2026. The new figure is higher on 36 and lower on 44.
  • 4SHP18LX136P changed its certified heat output at 47°F on 205 pairings in the certified data between February 2025 and September 2026. The new figure is higher on 4 and lower on 201.
  • 4SHP18LX136P changed its certified cooling capacity at 95°F on 2 pairings from 24,000 Btu/h to 23,000 Btu/h in the certified data between February 2025 and March 2025.
  • 4SHP18LX136P was in the certified data by September 2024.

History and definitions

Other 4SHP18LX SERIES models by nominal cooling size: 4SHP18LX160P (48,000 Btu).

History

First certified record
Most recent certified record
Measurements reported
Jun 3, 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, “4SHP18LX136P — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/4shp18lx136p