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W5H8T24*K*AAA*

W5H8T24*K*AAA* is in the certified data.

Its certified full-speed heating output at 5°F is 10,700–11,400 Btu/h, 44–46% of its 47°F rating, depending on the pairing.

EcoTemp and Grandaire · central heat pump

W5H8T24*K*AAA* is in the certified data as of Sep 19, 2026. W5H8T24*K*AAA* changed its certified HSPF2 on 4 pairings from 8.0 to 8.1 in the certified data between June 2025 and August 2025.

248 certified pairings with 110 different figures. See all

Heating at 47°F

24,600

14,500 at 17°F

11,000 at 5°F

Btu/h, certified

2.04 COP at 5°F

Cooling at 95°F

22,600

Btu/h, certified

EER2 12.5 at 95°F

SEER2 16.5

Heating and cooling by outdoor temperature

Certified heating at 5, 17, and 47°F and cooling at 95°F for W5H8T24*K*AAA*, by outdoor temperature Heating: 11,000 Btu/h at 5°F, 14,500 Btu/h at 17°F, 24,600 Btu/h at 47°F. Cooling: 22,600 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 5,000 10,000 15,000 20,000 25,000 Btu/h 11,000 5°F 14,500 17°F 24,600 47°F 22,600 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 24,600 Btu/h of heat at 47°F, 14,500 Btu/h at 17°F, and 11,000 Btu/h at 5°F, 45% of its 47°F rating. It delivers 22,600 Btu/h of cooling at 95°F. At 5°F that is 8,000 Btu/h short of the example heating load of 19,000 Btu/h; at 95°F it is 13,100 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 high stage; 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 215643826 · listed by Grandaire · certified Jan 30, 2025 · 6 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°Fone compressor speed 11,0003.22 kW −42% 2.04
17°Fone compressor speed 14,5004.25 kW −24% NR
47°Fone compressor speed 24,6007.21 kW +3% NR
95°Fcooling, full load 22,6006.62 kW — NR

EER2 12.5 in that test. SEER2 16.5 over the modeled cooling season.

Power use at each temperature

Electrical input in the 5°F full-speed test
1.58kW
Electrical input in the 95°F cooling test
1.81kW
Seasonal average heating COP
2.37

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
11,000 Btu/h
This unit at 5°F median across its pairings
11,000 Btu/h
Median of 2-ton central models at 5°F
19,000 Btu/h
Models in this group
565

This unit is above 5% of them, at number 535 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 W5H8T24*K*AAA*

248 pairings · 248 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 high stage 24,600 Btu/h 24,000–25,000 Btu/h
Heat output at 17°F full speed 14,500 Btu/h 14,100–14,900 Btu/h
Heat output at 5°F full speed 11,000 Btu/h 10,700–11,400 Btu/h
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating 45%
COP at 5°F full speed 2.04 1.90–2.16
HSPF2 Region IV 8.1 7.8–8.1
Cooling
Cooling capacity at 95°F full-load test 22,600 Btu/h 22,200–25,000 Btu/h
EER2 at 95°F 12.5 11.5–14.0
SEER2 cooling season 16.5 15.2–18.5
Cooling at other temperatures NR NR
Equipment and listing
Refrigerant R-454B
Compressor Two-stage
Indoor unit W5A*24M17XA* 21 indoor units
FurnaceWFET045A036A* 20 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 W5H8T24*K*AAA*

Pairings, by indoor-unit class

21 indoor units · 248 certified pairings

One row per indoor unit certified with this outdoor unit.

Furnace paired · 10 indoor units

  1. W5SH30M12XA* brand not stated 11,100 Btu/hat 5°F, full speed

    38 pairings, 19 with a furnace · 47°F 24,600 Btu/h · 95°F cooling 22,800 Btu/h · Cold output 45% · COP 2.08

  2. W5A*24M17XA* brand not stated 11,000 Btu/hat 5°F, full speed

    26 pairings, 13 with a furnace · 47°F 24,600 Btu/h · 95°F cooling 22,600 Btu/h · Cold output 45% · COP 2.04

  3. W5A*25M17XA* brand not stated 11,100 Btu/hat 5°F, full speed

    26 pairings, 13 with a furnace · 47°F 24,800 Btu/h · 95°F cooling 23,400 Btu/h · Cold output 45% · COP 2.08

  4. W5A*36M17XA* brand not stated 10,900 Btu/hat 5°F, full speed

    26 pairings, 13 with a furnace · 47°F 24,600 Btu/h · 95°F cooling 22,800 Btu/h · Cold output 45% · COP 2.06

  5. W5SH36M12XA* brand not stated 11,000 Btu/hat 5°F, full speed

    26 pairings, 13 with a furnace · 47°F 24,600 Btu/h · 95°F cooling 23,200 Btu/h · Cold output 45% · COP 2.08

  6. W5A*30M17XA* brand not stated 11,000 Btu/hat 5°F, full speed

    24 pairings, 12 with a furnace · 47°F 24,600 Btu/h · 95°F cooling 22,800 Btu/h · Cold output 45% · COP 2.06

  7. W5A*37M17XA* brand not stated 11,100 Btu/hat 5°F, full speed

    24 pairings, 12 with a furnace · 47°F 24,800 Btu/h · 95°F cooling 23,400 Btu/h · Cold output 45% · COP 2.08

  8. W5SH24M12XA* brand not stated 11,100 Btu/hat 5°F, full speed

    18 pairings, 9 with a furnace · 47°F 24,600 Btu/h · 95°F cooling 22,800 Btu/h · Cold output 45% · COP 2.00

  9. W5A*24M14XA* brand not stated 11,050 Btu/hat 5°F, full speed

    8 pairings, 4 with a furnace · 47°F 24,600 Btu/h · 95°F cooling 22,300 Btu/h · Cold output 45% · COP 2.04

  10. W5A*30M14XA* brand not stated 10,900 Btu/hat 5°F, full speed

    6 pairings, 3 with a furnace · 47°F 24,400 Btu/h · 95°F cooling 22,800 Btu/h · Cold output 45% · COP 2.06

Indoor units in the furnace paired class
Indoor unit Brand At 5°FBtu/h · full speed At 47°FBtu/h · high stage At 95°FBtu/h · cooling Cold output% of 47°F rating COP 5°Ffull speed Cold climate Pairings
W5SH30M12XA* — 11,100 24,600 22,800 45% 2.08 NC 38
W5A*24M17XA* — 11,000 24,600 22,600 45% 2.04 NC 26
W5A*25M17XA* — 11,100 24,800 23,400 45% 2.08 NC 26
W5A*36M17XA* — 10,900 24,600 22,800 45% 2.06 NC 26
W5SH36M12XA* — 11,000 24,600 23,200 45% 2.08 NC 26
W5A*30M17XA* — 11,000 24,600 22,800 45% 2.06 NC 24
W5A*37M17XA* — 11,100 24,800 23,400 45% 2.08 NC 24
W5SH24M12XA* — 11,100 24,600 22,800 45% 2.00 NC 18
W5A*24M14XA* — 11,050 24,600 22,300 45% 2.04 NC 8
W5A*30M14XA* — 10,900 24,400 22,800 45% 2.06 NC 6

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

Showing 10 of 21 indoor units All 248 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

  • W5H8T24*K*AAA* 248 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

  • W5H8T24*K*AAA* changed its certified HSPF2 on 4 pairings from 8.0 to 8.1 in the certified data between June 2025 and August 2025.
  • W5H8T24*K*AAA* changed its certified COP at 5°F on 4 pairings in the certified data between June 2025 and August 2025. The new figure is higher on all 4.
  • W5H8T24*K*AAA* changed its certified SEER2 on 6 pairings in the certified data between March 2025 and May 2025. The new figure is higher on 4 and lower on 2.
  • W5H8T24*K*AAA* changed its certified HSPF2 on 18 pairings from 7.8 to 8.0 in the certified data between March 2025 and May 2025.
  • W5H8T24*K*AAA* changed its certified COP at 5°F on 20 pairings in the certified data between March 2025 and May 2025. The new figure is higher on 16 and lower on 4.
  • W5H8T24*K*AAA* first appeared in the certified data between February 2025 and March 2025.

History and definitions

History

First certified record
Most recent certified record
Measurements reported
Jan 30, 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, “W5H8T24*K*AAA* — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/w5h8t24_stk_staaa_st