Heat Pump List
Menu

Sections

Tools

BOHA-36RTB-M18S

BOHA-36RTB-M18S is in the certified data.

Its certified full-speed heating output at 5°F is 28,000–34,000 Btu/h, 78–85% of its 47°F rating (tests at different compressor speeds), depending on the pairing.

Bosch · central heat pump

BOHA-36RTB-M18S is in the certified data as of Sep 19, 2026.

15 certified pairings with 10 different figures. See all

Heating at 47°F

36,000

27,800 at 17°F

30,000 at 5°F

Btu/h, certified

1.90 COP at 5°F

Cooling at 95°F

34,000

Btu/h, certified

EER2 11.0 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 BOHA-36RTB-M18S, by outdoor temperature Heating: 30,000 Btu/h at 5°F, 27,800 Btu/h at 17°F, 36,000 Btu/h at 47°F. Cooling: 34,000 Btu/h at 95°F. The bars start at zero. Median of 3-ton central models: 26,400 Btu/h at 5°F, 26,200 Btu/h at 17°F, 35,200 Btu/h at 47°F, 35,000 Btu/h at 95°F. 0 10,000 20,000 30,000 40,000 Btu/h 30,000 5°F 27,800 17°F 36,000 47°F 34,000 95°F Outdoor temperature (°F)
  • Heating output
  • Cooling output
  • Median of 3-ton central models
  • Example heating load
  • Example cooling load
  • Frosting range, 17 to 45°F

This pairing delivers 36,000 Btu/h of heat at 47°F, 27,800 Btu/h at 17°F, and 30,000 Btu/h at 5°F, 83% of its 47°F rating. It delivers 34,000 Btu/h of cooling at 95°F. At 5°F that is 3,500 Btu/h above the example heating load of 26,500 Btu/h; at 95°F it is 21,000 Btu/h above the example cooling load of 13,000 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 3-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 1,100 sq ft where winters reach 5°F: heating runs from 26,500 Btu/h at 5°F to 0 at 65°F, and cooling runs from 0 at 65°F to 13,000 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 218032247 · listed by Bosch · certified Jan 20, 2026 · 3 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 3-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 30,0008.79 kW +14% 1.90
17°Ffull speed 27,8008.15 kW +6% NR
47°Fnormal speed 36,00010.55 kW +2% NR
95°Fcooling, full load 34,0009.96 kW — NR

EER2 11.0 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
4.63kW
Electrical input in the 95°F cooling test
3.09kW
Seasonal average heating COP
2.64

These exclude backup resistance heat.

Updated Sep 19, 2026 · Methodology

How it compares with other 36,000 Btu heat pumps

3-ton central models

This pairing at 5°F
30,000 Btu/h
This unit at 5°F median across its pairings
30,000 Btu/h
Median of 3-ton central models at 5°F
26,400 Btu/h
Models in this group
451

This unit is above 64% of them, at number 161 of 451 by heat at 5°F. The middle half of the group runs 18,650 to 32,000 Btu/h.

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

Closest models by heat at 5°F

Every 36,000 Btu (3-ton) unit, ranked by cooling efficiency, then heating efficiency

Certified values for BOHA-36RTB-M18S

15 pairings · 15 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 36,000 Btu/h 34,200–40,000 Btu/h
Heat output at 17°F full speed 27,800 Btu/h 27,800–31,200 Btu/h
Heat output at 5°F full speed 30,000 Btu/h 28,000–34,000 Btu/h
Heat output below 5°F NR NR
Cold output 5°F output as a % of the 47°F rating 83%
COP at 5°F full speed 1.90 1.85–2.00
HSPF2 Region IV 9.0 8.0–9.5
Cooling
Cooling capacity at 95°F full-load test 34,000 Btu/h 32,600–36,000 Btu/h
EER2 at 95°F 11.0 9.8–11.8
SEER2 cooling season 16.5 16.0–19.0
Cooling at other temperatures NR NR
Equipment and listing
Refrigerant R-454B
Compressor Variable speed
Indoor unit BIVB-36RCB-M20X 9 indoor units
FurnaceNo furnace 4 furnaces
Cold-climate designation EPA's designation, as published Yes On every pairing
ENERGY STAR Most Efficient EPA's designation, as published Yes On some pairings
Where it is sold US and Canada US and Canada
Model string as certified BOHA-36RTB-M18S

Pairings, by indoor-unit class

9 indoor units · 15 certified pairings

One row per indoor unit certified with this outdoor unit.

Furnace paired · 5 indoor units

  1. BMAC3036ABTA brand not stated 28,000 Btu/hat 5°F, full speed

    2 pairings, 2 with a furnace · 47°F 34,200 Btu/h · 95°F cooling 32,600 Btu/h · Cold output 82% · COP 1.85

  2. BMAC3036BBTA brand not stated 29,000 Btu/hat 5°F, full speed

    2 pairings, 2 with a furnace · 47°F 35,100 Btu/h · 95°F cooling 33,300 Btu/h · Cold output 83% · COP 1.88

  3. BMAC3036CBTA brand not stated 28,000 Btu/hat 5°F, full speed

    2 pairings, 2 with a furnace · 47°F 36,000 Btu/h · 95°F cooling 34,000 Btu/h · Cold output 78% · COP 1.90

  4. BMAC4248BBTA brand not stated 30,000 Btu/hat 5°F, full speed

    1 pairing, 1 with a furnace · 47°F 36,000 Btu/h · 95°F cooling 34,000 Btu/h · Cold output 83% · COP 1.90

  5. BMAC4248CBTA brand not stated 28,000 Btu/hat 5°F, full speed

    1 pairing, 1 with a furnace · 47°F 36,000 Btu/h · 95°F cooling 34,000 Btu/h · Cold output 78% · COP 1.90

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
BMAC3036ABTA — 28,000 34,200 32,600 82% 1.85 Yes 2
BMAC3036BBTA — 29,000 35,100 33,300 83% 1.88 Yes 2
BMAC3036CBTA — 28,000 36,000 34,000 78% 1.90 Yes 2
BMAC4248BBTA — 30,000 36,000 34,000 83% 1.90 Yes 1
BMAC4248CBTA — 28,000 36,000 34,000 78% 1.90 Yes 1

Air handler · 4 indoor units

  1. BIVA-36RCB-M20X brand not stated 30,000 Btu/hat 5°F, full speed

    1 pairing · 47°F 36,000 Btu/h · 95°F cooling 34,000 Btu/h · Cold output 83% · COP 1.90

  2. BIVA-36VCB-M18X brand not stated 30,000 Btu/hat 5°F, full speed

    1 pairing · 47°F 36,000 Btu/h · 95°F cooling 34,000 Btu/h · Cold output 83% · COP 1.90

  3. BIVB-36RCB-M20X brand not stated 30,000 Btu/hat 5°F, full speed

    1 pairing · 47°F 36,000 Btu/h · 95°F cooling 34,000 Btu/h · Cold output 83% · COP 1.90

  4. BIVB-36RCB-M20X* brand not stated 30,000 Btu/hat 5°F, full speed

    1 pairing · 47°F 36,000 Btu/h · 95°F cooling 34,000 Btu/h · Cold output 83% · COP 1.90

Indoor units in the air handler 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
BIVA-36RCB-M20X — 30,000 36,000 34,000 83% 1.90 Yes 1
BIVA-36VCB-M18X — 30,000 36,000 34,000 83% 1.90 Yes 1
BIVB-36RCB-M20X — 30,000 36,000 34,000 83% 1.90 Yes 1
BIVB-36RCB-M20X* — 30,000 36,000 34,000 83% 1.90 Yes 1

Ductless indoor

  1. None listed BOSCH 34,000 Btu/hat 5°F, full speed

    3 pairings · 47°F 40,000 Btu/h · 95°F cooling 36,000 Btu/h · Cold output 85% · COP 1.95

Indoor units in the ductless indoor 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
None listed BOSCH 34,000 40,000 36,000 85% 1.95 Yes 3

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

Showing 9 of 9 indoor units

Sold as, and units with identical certified values

Brands listing this model number

Model number as listed

  • BOHA-36RTB-M18S 15 pairings

Variants of the same model number

2 units in this group. Basis: identical certified values in the certified data. This grouping is our inference, not a field in the certified data.

1 of 2 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.

History and definitions

History

First certified record
Most recent certified record
Measurements reported
Jan 20, 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, “BOHA-36RTB-M18S — certified heat output”. Certified figures dated , checked daily.
https://heatpumplist.com/model/boha-36rtb-m18s