Heat Pump List
Menu

Sections

Tools

A5HP5042A1

A5HP5042A1 is in the certified data.

Its certified full-speed heating output at 5°F is 18,800–20,000 Btu/h, 48–51% of its 47°F rating, depending on the pairing.

Ameristar and RunTru · central heat pump

All 37 certified Ameristar models · All 37 certified RunTru models

A5HP5042A1 is in the certified data as of Sep 19, 2026.

250 certified pairings with 77 different figures. See all

Heating at 47°F

38,000

25,200 at 17°F

19,300 at 5°F

Btu/h, certified

2.10 COP at 5°F

Cooling at 95°F

37,800

Btu/h, certified

EER2 11.7 at 95°F

SEER2 15.2

Heating and cooling by outdoor temperature

Certified heating at 5, 17, and 47°F and cooling at 95°F for A5HP5042A1, by outdoor temperature Heating: 19,300 Btu/h at 5°F, 25,200 Btu/h at 17°F, 38,000 Btu/h at 47°F. Cooling: 37,800 Btu/h at 95°F. The bars start at zero. Median of 3.5-ton central models: 33,000 Btu/h at 5°F, 31,000 Btu/h at 17°F, 44,000 Btu/h at 47°F, 44,000 Btu/h at 95°F. 0 10,000 20,000 30,000 40,000 50,000 Btu/h 19,300 5°F 25,200 17°F 38,000 47°F 37,800 95°F Outdoor temperature (°F)
  • Heating output
  • Cooling output
  • Median of 3.5-ton central models
  • Example heating load
  • Example cooling load
  • Frosting range, 17 to 45°F

This pairing delivers 38,000 Btu/h of heat at 47°F, 25,200 Btu/h at 17°F, and 19,300 Btu/h at 5°F, 51% of its 47°F rating. It delivers 37,800 Btu/h of cooling at 95°F. At 5°F that is 13,700 Btu/h short of the example heating load of 33,000 Btu/h; at 95°F it is 20,800 Btu/h above the example cooling load of 17,000 Btu/h.

Each bar is a separate certified test, drawn at its outdoor temperature, starting at zero. The 47°F figure is at one speed; the 17 and 5°F figures are at full speed. The short dark line on each bar is the median of 3.5-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 1,400 sq ft where winters reach 5°F: heating runs from 33,000 Btu/h at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 17,000 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 215575406 · listed by RunTru · certified Apr 9, 2025 · 4 pairings share these values

Rebates where you live

Meets the recorded equipment thresholds of 34 programs in 22 states, provinces, or territories:California (2), Colorado (1), Delaware (1), Idaho (2), Illinois (1), Kansas (1), Maryland (3), Michigan (2), Minnesota (2), Mississippi (1), Nevada (1), New Hampshire (1), New Jersey (4), North Carolina (1), Oregon (2), Pennsylvania (3), South Carolina (1), Texas (3), Utah (1), Washington (2), Wisconsin (1), Newfoundland and Labrador (1).

All 34 programs by state and province

California

Colorado

Delaware

Idaho

Illinois

Kansas

Maryland

Michigan

Minnesota

Mississippi

Nevada

New Hampshire

New Jersey

North Carolina

Oregon

Pennsylvania

South Carolina

Texas

Utah

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 3.5-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°Fone compressor speed 19,3005.66 kW −42% 2.10
17°Fone compressor speed 25,2007.39 kW −19% NR
47°Fone compressor speed 38,00011.14 kW −14% NR
95°Fcooling, full load 37,80011.08 kW — NR

EER2 11.7 in that test. SEER2 15.2 over the modeled cooling season.

Power use at each temperature

Electrical input in the 5°F full-speed test
2.69kW
Electrical input in the 95°F cooling test
3.23kW
Seasonal average heating COP
2.37

These exclude backup resistance heat.

Updated Sep 19, 2026 · Methodology

How it compares with other 42,000 Btu heat pumps

3.5-ton central models

This pairing at 5°F
19,300 Btu/h
This unit at 5°F median across its pairings
19,300 Btu/h
Median of 3.5-ton central models at 5°F
33,000 Btu/h
Models in this group
222

This unit is above 7% of them, at number 207 of 222 by heat at 5°F. The middle half of the group runs 20,000 to 40,000 Btu/h.

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

Among 42,000 Btu central models, each by its median certified pairing, highest first: 5°F output as a share of its 47°F rating, 182nd of 222; HSPF2, 122nd of 224 (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.

  • DZ6VSA421EA: 40,000 Btu/h at 47°F (this model: 39,500); 30,600 Btu/h at 5°F (this model: 19,300).
  • RD16AY48AJVC: 40,000 Btu/h at 47°F (this model: 39,500); 22,000 Btu/h at 5°F (this model: 19,300).
  • 5DCZ5042A1: 39,000 Btu/h at 47°F (this model: 39,500); HSPF2 7.2 (this model: 8.1).

Closest models by heat at 5°F

Every 42,000 Btu (3.5-ton) unit, ranked by cooling efficiency, then heating efficiency

Floor area at the cold test point

The median certified output of 19,300 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 insulation24–42460–800
MildTypical16–26740–1,210
MildTight, well insulated10–181,070–1,930
ColdDrafty, little insulation28–52370–690
ColdTypical18–30640–1,070
ColdTight, well insulated12–22880–1,610
Very coldDrafty, little insulation32–58330–600
Very coldTypical22–38510–880
Very coldTight, well insulated16–28690–1,210

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 A5HP5042A1

250 pairings · 250 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 one speed 38,000 Btu/h 37,400–40,500 Btu/h
Heat output at 17°F full speed 25,200 Btu/h 24,800–26,400 Btu/h
Heat output at 5°F full speed 19,300 Btu/h 18,800–20,000 Btu/h
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating 51%
COP at 5°F full speed 2.10 2.00–2.30
HSPF2 Region IV 8.1 7.8–8.1
Cooling
Cooling capacity at 95°F full-load test 37,800 Btu/h 37,800–41,500 Btu/h
EER2 at 95°F 11.7 11.7–12.0
SEER2 cooling season 15.2 15.2–16.0
Cooling at other temperatures NR NR
Equipment and listing
Refrigerant R-454B
Compressor Single stage
Indoor unit 5PX*D008AS3+TSTAT 34 indoor units
FurnaceA952V120DD5SB 33 furnaces
Cold-climate designation EPA's designation, as published NC NC
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 A5HP5042A1

Across 250 certified pairings with 34 indoor models: heat at 5°F 18,800 Btu/h with A5AHC004A1D3+TDR+TSTAT to 20,000 Btu/h with 5PX*B006AS3+TSTAT; HSPF2 7.8 with 5PX*B006AS3+TSTAT to 8.1 with 5PX*B006AS3+TSTAT; SEER2 15.2 with 5PX*B006AS3+TSTAT to 16.0 with 5PX*B006AS3+TSTAT+P0V0B000M40SD. Endpoints name one indoor model where recorded; the furnace pairing can also change the figures.

Pairings, by indoor-unit class

34 indoor units · 250 certified pairings

One row per indoor unit certified with this outdoor unit.

Furnace paired · 5 indoor units

  1. 5TXCC007AS3+TSTAT brand not stated 19,500 Btu/hat 5°F, full speed

    26 pairings, 13 with a furnace · 47°F 40,000 Btu/h · 95°F cooling 40,000 Btu/h · Cold output 49% · COP 2.10

  2. 5TXCB006AS3+TSTAT brand not stated 19,400 Btu/hat 5°F, full speed

    24 pairings, 12 with a furnace · 47°F 39,250 Btu/h · 95°F cooling 39,000 Btu/h · Cold output 49% · COP 2.10

  3. 5PX*C007AS3+TSTAT brand not stated 19,400 Btu/hat 5°F, full speed

    18 pairings, 9 with a furnace · 47°F 39,500 Btu/h · 95°F cooling 40,000 Btu/h · Cold output 49% · COP 2.10

  4. 5PX*B006AS3+TSTAT brand not stated 19,450 Btu/hat 5°F, full speed

    16 pairings, 8 with a furnace · 47°F 39,500 Btu/h · 95°F cooling 39,250 Btu/h · Cold output 49% · COP 2.10

  5. 5PX*D008AS3+TSTAT brand not stated 19,500 Btu/hat 5°F, full speed

    10 pairings, 5 with a furnace · 47°F 40,000 Btu/h · 95°F cooling 40,500 Btu/h · Cold output 49% · COP 2.10

Indoor units in the furnace paired class
Indoor unit Brand At 5°FBtu/h · full speed At 47°FBtu/h · one speed At 95°FBtu/h · cooling Cold output% of 47°F rating COP 5°Ffull speed Cold climate Pairings
5TXCC007AS3+TSTAT — 19,500 40,000 40,000 49% 2.10 NC 26
5TXCB006AS3+TSTAT — 19,400 39,250 39,000 49% 2.10 NC 24
5PX*C007AS3+TSTAT — 19,400 39,500 40,000 49% 2.10 NC 18
5PX*B006AS3+TSTAT — 19,450 39,500 39,250 49% 2.10 NC 16
5PX*D008AS3+TSTAT — 19,500 40,000 40,500 49% 2.10 NC 10

Air handler · 5 indoor units

  1. 5PX*C009AS3+TSTAT brand not stated 19,300 Btu/hat 5°F, full speed

    22 pairings, 10 with a furnace · 47°F 39,000 Btu/h · 95°F cooling 40,500 Btu/h · Cold output 49% · COP 2.10

  2. 5TXCC009AS3+TSTAT brand not stated 19,300 Btu/hat 5°F, full speed

    22 pairings, 10 with a furnace · 47°F 39,000 Btu/h · 95°F cooling 40,500 Btu/h · Cold output 49% · COP 2.10

  3. 5TXCD010AS3+TSTAT brand not stated 19,300 Btu/hat 5°F, full speed

    16 pairings, 7 with a furnace · 47°F 39,250 Btu/h · 95°F cooling 40,500 Btu/h · Cold output 49% · COP 2.10

  4. 5PX*CD09AS3+TSTAT brand not stated 19,200 Btu/hat 5°F, full speed

    12 pairings, 5 with a furnace · 47°F 39,000 Btu/h · 95°F cooling 40,500 Btu/h · Cold output 49% · COP 2.10

  5. 5PX*D010AS3+TSTAT brand not stated 19,300 Btu/hat 5°F, full speed

    10 pairings, 4 with a furnace · 47°F 39,500 Btu/h · 95°F cooling 41,000 Btu/h · Cold output 49% · COP 2.10

Indoor units in the air handler class
Indoor unit Brand At 5°FBtu/h · full speed At 47°FBtu/h · one speed At 95°FBtu/h · cooling Cold output% of 47°F rating COP 5°Ffull speed Cold climate Pairings
5PX*C009AS3+TSTAT — 19,300 39,000 40,500 49% 2.10 NC 22
5TXCC009AS3+TSTAT — 19,300 39,000 40,500 49% 2.10 NC 22
5TXCD010AS3+TSTAT — 19,300 39,250 40,500 49% 2.10 NC 16
5PX*CD09AS3+TSTAT — 19,200 39,000 40,500 49% 2.10 NC 12
5PX*D010AS3+TSTAT — 19,300 39,500 41,000 49% 2.10 NC 10

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

Showing 10 of 34 indoor units All 250 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

  • A5HP5042A1 250 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.

History and definitions

Other A5HP5 models by nominal cooling size: A5HP5018A1 (18,000 Btu), A5HP5024A1 (24,000 Btu), A5HP5030A1 (30,000 Btu), A5HP5036A1 (36,000 Btu), A5HP5048A1 (42,000 Btu), A5HP5060A1 (54,000 Btu).

History

First certified record
Most recent certified record
Measurements reported
Apr 9, 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, “A5HP5042A1 — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/a5hp5042a1