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SH4BF5M2SX24K

SH4BF5M2SX24K is in the certified data.

Its certified full-speed heating output at 5°F is 11,000 Btu/h, 48% of its 47°F rating across its certified pairings.

Nordyne and Nortek · central heat pump

All 3 certified Nordyne models · All 6 certified Nortek models

SH4BF5M2SX24K is in the certified data as of Sep 19, 2026.

5 certified pairings with 2 different figures. See all

Heating at 47°F

22,800

14,000 at 17°F

11,000 at 5°F

Btu/h, certified

1.75 COP at 5°F

Cooling at 95°F

24,000

Btu/h, certified

EER2 11.7 at 95°F

SEER2 16.0

Heating and cooling by outdoor temperature

Certified heating at 5, 17, and 47°F and cooling at 95°F for SH4BF5M2SX24K, by outdoor temperature Heating: 11,000 Btu/h at 5°F, 14,000 Btu/h at 17°F, 22,800 Btu/h at 47°F. Cooling: 24,000 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 14,000 17°F 22,800 47°F 24,000 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 22,800 Btu/h of heat at 47°F, 14,000 Btu/h at 17°F, and 11,000 Btu/h at 5°F, 48% of its 47°F rating. It delivers 24,000 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 14,500 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 216508803 · listed by NORTEK GLOBAL HVAC LLC · certified Jan 31, 2025 · 3 pairings share these values

Rebates where you live

Meets the recorded equipment thresholds of 29 programs in 18 states, provinces, or territories:California (2), Colorado (1), Delaware (1), Idaho (1), Kansas (1), Maryland (3), Michigan (2), Minnesota (2), Mississippi (1), Nevada (1), New Jersey (4), North Carolina (1), Oregon (2), Pennsylvania (3), South Carolina (1), Texas (3), Utah (1), Newfoundland and Labrador (1).

All 29 programs by state and province

California

Colorado

Delaware

Idaho

Kansas

Maryland

Michigan

Minnesota

Mississippi

Nevada

New Jersey

North Carolina

Oregon

Pennsylvania

South Carolina

Texas

Utah

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°Fone compressor speed 11,0003.22 kW −42% 1.75
17°Fone compressor speed 14,0004.10 kW −27% NR
47°Fone compressor speed 22,8006.68 kW −5% NR
95°Fcooling, full load 24,0007.03 kW — NR

EER2 11.7 in that test. SEER2 16.0 over the modeled cooling season.

Power use at each temperature

Electrical input in the 5°F full-speed test
1.84kW
Electrical input in the 95°F cooling test
2.05kW
Seasonal average heating COP
2.34

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.

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, 522nd of 565 (tied); HSPF2, 473rd 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.

  • MLP19AY24AJVC: The same 22,800 Btu/h rating at 47°F; 18,500 Btu/h at 5°F (this model: 11,000).
  • FOP1924MJAYCA: The same 22,800 Btu/h rating at 47°F; 18,400 Btu/h at 5°F (this model: 11,000).
  • 5TWV0X24A1: The same 22,800 Btu/h rating at 47°F; 18,100 Btu/h at 5°F (this model: 11,000).

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 11,000 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 insulation24–42260–460
MildTypical16–26420–690
MildTight, well insulated10–18610–1,100
ColdDrafty, little insulation28–52210–390
ColdTypical18–30370–610
ColdTight, well insulated12–22500–920
Very coldDrafty, little insulation32–58190–340
Very coldTypical22–38290–500
Very coldTight, well insulated16–28390–690

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 SH4BF5M2SX24K

5 pairings · 5 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 22,800 Btu/h 22,800 Btu/h
Heat output at 17°F full speed 14,000 Btu/h 14,000–14,600 Btu/h
Heat output at 5°F full speed 11,000 Btu/h 11,000 Btu/h
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating 48%
COP at 5°F full speed 1.75 1.75
HSPF2 Region IV 8.0 7.8–8.0
Cooling
Cooling capacity at 95°F full-load test 24,000 Btu/h 23,000–24,000 Btu/h
EER2 at 95°F 11.7 11.7
SEER2 cooling season 16.0 16.0
Cooling at other temperatures NR NR
Equipment and listing
Refrigerant R-454B
Compressor Two-stage
Indoor unit B65VMMX24K-B 4 indoor units
FurnaceNo furnace 1 furnace
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 SH4BF5M2SX24K

Across 5 certified pairings with 4 indoor models: heat at 5°F 11,000 Btu/h throughout; HSPF2 7.8 with C75B(A,H)MX36C*B to 8.0 with B65VMMX24K*B; SEER2 16.0 throughout. Endpoints name one indoor model where recorded; the furnace pairing can also change the figures.

Pairings, by indoor-unit class

4 indoor units · 5 certified pairings

One row per indoor unit certified with this outdoor unit.

Furnace paired · 2 indoor units

  1. C75B(A,H)MX36C*B brand not stated 11,000 Btu/hat 5°F, full speed

    1 pairing, 1 with a furnace · 47°F 22,800 Btu/h · 95°F cooling 23,000 Btu/h · Cold output 48% · COP 1.75

  2. C75B(A,H)MX36C-B brand not stated 11,000 Btu/hat 5°F, full speed

    1 pairing, 1 with a furnace · 47°F 22,800 Btu/h · 95°F cooling 23,000 Btu/h · Cold output 48% · COP 1.75

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
C75B(A,H)MX36C*B — 11,000 22,800 23,000 48% 1.75 NC 1
C75B(A,H)MX36C-B — 11,000 22,800 23,000 48% 1.75 NC 1

Air handler · 2 indoor units

  1. B65VMMX24K-B brand not stated 11,000 Btu/hat 5°F, full speed

    2 pairings · 47°F 22,800 Btu/h · 95°F cooling 24,000 Btu/h · Cold output 48% · COP 1.75

  2. B65VMMX24K*B brand not stated 11,000 Btu/hat 5°F, full speed

    1 pairing · 47°F 22,800 Btu/h · 95°F cooling 24,000 Btu/h · Cold output 48% · COP 1.75

Indoor units in the air handler 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
B65VMMX24K-B — 11,000 22,800 24,000 48% 1.75 NC 2
B65VMMX24K*B — 11,000 22,800 24,000 48% 1.75 NC 1

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

Showing 4 of 4 indoor units

Sold as, and units with identical certified values

Brands listing this model number

Model number as listed

  • SH4BF5M2SX24K 5 pairings

Variants of the same model number

3 units in this group. 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.

Product history

  • SH4BF5M2SX24K first appeared in the certified data between February 2025 and March 2025.

History and definitions

Other NORDYNE SH4BF SERIES models by nominal cooling size: SH4BF5M2SX36K (36,000 Btu), SH4BF5M2SX48K (48,000 Btu).

History

First certified record
Most recent certified record
Measurements reported
Jan 31, 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, “SH4BF5M2SX24K — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/sh4bf5m2sx24k