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SH4BF5M2SX48K

SH4BF5M2SX48K is in the certified data.

Its certified full-speed heating output at 5°F is 23,400–25,400 Btu/h, 51–56% of its 47°F rating (tests at different compressor speeds), depending on the pairing.

Nordyne and Nortek · central heat pump

SH4BF5M2SX48K is in the certified data as of Sep 19, 2026.

7 certified pairings with 3 different figures. See all

Heating at 47°F

45,500

30,800 at 17°F

25,000 at 5°F

Btu/h, certified

1.75 COP at 5°F

Cooling at 95°F

45,500

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 SH4BF5M2SX48K, by outdoor temperature Heating: 25,000 Btu/h at 5°F, 30,800 Btu/h at 17°F, 45,500 Btu/h at 47°F. Cooling: 45,500 Btu/h at 95°F. The bars start at zero. Median of 4-ton central models: 36,400 Btu/h at 5°F, 35,000 Btu/h at 17°F, 48,000 Btu/h at 47°F, 48,000 Btu/h at 95°F. 0 10,000 20,000 30,000 40,000 50,000 Btu/h 25,000 5°F 30,800 17°F 45,500 47°F 45,500 95°F Outdoor temperature (°F)
  • Heating output
  • Cooling output
  • Median of 4-ton central models
  • Example heating load
  • Example cooling load
  • Frosting range, 17 to 45°F

This pairing delivers 45,500 Btu/h of heat at 47°F, 30,800 Btu/h at 17°F, and 25,000 Btu/h at 5°F, 55% of its 47°F rating. It delivers 45,500 Btu/h of cooling at 95°F. At 5°F that is 11,500 Btu/h short of the example heating load of 36,500 Btu/h; at 95°F it is 27,500 Btu/h above the example cooling load of 18,000 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 4-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 1,500 sq ft where winters reach 5°F: heating runs from 36,500 Btu/h at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 18,000 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 216802057 · listed by NORDYNE · certified May 15, 2025 · 2 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 4-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 25,0007.33 kW −31% 1.75
17°Fone compressor speed 30,8009.03 kW −12% NR
47°Fone compressor speed 45,50013.33 kW −5% NR
95°Fcooling, full load 45,50013.33 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
4.19kW
Electrical input in the 95°F cooling test
3.89kW
Seasonal average heating COP
2.34

These exclude backup resistance heat.

Updated Sep 19, 2026 · Methodology

How it compares with other 48,000 Btu heat pumps

4-ton central models

This pairing at 5°F
25,000 Btu/h
This unit at 5°F median across its pairings
25,000 Btu/h
Median of 4-ton central models at 5°F
36,400 Btu/h
Models in this group
408

This unit is above 21% of them, at number 323 of 408 by heat at 5°F. The middle half of the group runs 25,350 to 46,000 Btu/h.

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

Closest models by heat at 5°F

Every 48,000 Btu (4-ton) unit, ranked by cooling efficiency, then heating efficiency

Certified values for SH4BF5M2SX48K

7 pairings · 7 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 45,500 Btu/h 45,500–46,000 Btu/h
Heat output at 17°F full speed 30,800 Btu/h 28,000–31,000 Btu/h
Heat output at 5°F full speed 25,000 Btu/h 23,400–25,400 Btu/h
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating 55%
COP at 5°F full speed 1.75 1.75
HSPF2 Region IV 8.0 8.0
Cooling
Cooling capacity at 95°F full-load test 45,500 Btu/h 45,500 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 C75B(A,H)MX4860C-C 6 indoor units
FurnaceG7T(*)-V(*)C(*) 2 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 SH4BF5M2SX48K

Pairings, by indoor-unit class

6 indoor units · 7 certified pairings

One row per indoor unit certified with this outdoor unit.

Furnace paired · 4 indoor units

  1. C75B(A,H)MX4860C*C brand not stated 25,000 Btu/hat 5°F, full speed

    1 pairing, 1 with a furnace · 47°F 45,500 Btu/h · 95°F cooling 45,500 Btu/h · Cold output 55% · COP 1.75

  2. C75B(A,H)MX4860C*D brand not stated 25,400 Btu/hat 5°F, full speed

    1 pairing, 1 with a furnace · 47°F 45,500 Btu/h · 95°F cooling 45,500 Btu/h · Cold output 56% · COP 1.75

  3. C75B(A,H)MX4860C-C brand not stated 25,000 Btu/hat 5°F, full speed

    1 pairing, 1 with a furnace · 47°F 45,500 Btu/h · 95°F cooling 45,500 Btu/h · Cold output 55% · COP 1.75

  4. C75B(A,H)MX4860C-D brand not stated 25,400 Btu/hat 5°F, full speed

    1 pairing, 1 with a furnace · 47°F 45,500 Btu/h · 95°F cooling 45,500 Btu/h · Cold output 56% · 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)MX4860C*C — 25,000 45,500 45,500 55% 1.75 NC 1
C75B(A,H)MX4860C*D — 25,400 45,500 45,500 56% 1.75 NC 1
C75B(A,H)MX4860C-C — 25,000 45,500 45,500 55% 1.75 NC 1
C75B(A,H)MX4860C-D — 25,400 45,500 45,500 56% 1.75 NC 1

Air handler · 2 indoor units

  1. B65VMMX3648K-C brand not stated 23,400 Btu/hat 5°F, full speed

    2 pairings · 47°F 46,000 Btu/h · 95°F cooling 45,500 Btu/h · Cold output 51% · COP 1.75

  2. B65VMMX3648K*C brand not stated 23,400 Btu/hat 5°F, full speed

    1 pairing · 47°F 46,000 Btu/h · 95°F cooling 45,500 Btu/h · Cold output 51% · 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
B65VMMX3648K-C — 23,400 46,000 45,500 51% 1.75 NC 2
B65VMMX3648K*C — 23,400 46,000 45,500 51% 1.75 NC 1

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

Showing 6 of 6 indoor units

Sold as, and units with identical certified values

Brands listing this model number

Model number as listed

  • SH4BF5M2SX48K 7 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

  • SH4BF5M2SX48K 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
May 15, 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, “SH4BF5M2SX48K — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/sh4bf5m2sx48k