What is the SEER2 rating of the Bosch BPBA-36RCB-M18S?

The Bosch BPBA-36RCB-M18S is rated at up to 18.0 SEER2 and 11.0 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.

Is the Bosch BPBA-36RCB-M18S good for cold climates?

It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 3-ton model.

How much does the Bosch BPBA-36RCB-M18S cost to run per year?

At its rated efficiency it costs about $898-$2,727 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,152 in Phoenix and $2,313 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Is the Bosch BPBA-36RCB-M18S the same as the Bosch BPBB-36RTB-M18S?

Yes, as far as the certified ratings go. ENERGY STAR lists 4 model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.

3-ton packaged heat pump · IDP Premium LGWP

Bosch BPBA-36RCB-M18S

Very good cooling efficiency and average heating efficiency for a 3-ton packaged heat pump, but not rated for cold climates.

Ranks #5 of 22 3 ton packaged heat pumps for cooling efficiency, and costs about $1,109 a year to run in a mixed climate like Atlanta.

SEER2: 18.0 Cooling efficiency over a season
Very good · beats 86%
HSPF2: 8.1 Heating efficiency over a season
Average · beats 62%
EER2: 11.0 Cooling efficiency on a 95°F day
Below average · beats 17%
Heat at 5°F: 23,000 BTU/h64% of its 47°F output
Below average · beats 33%

A good fit if…

You want low cooling bills - its SEER2 beats 86% of packaged heat pumps.
You want steady temperatures and quiet running - the compressor varies its speed.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.

Calculate my running cost

Details

Specifications3 ton, R-454B

General
Brand	Bosch
Also sold as	Midea
Outdoor unit model	BPBA-36RCB-M18S
Series	IDP Premium LGWP
Type	Packaged heat pump
Nominal size	3 ton
CompressorVariable-speed units run longer at low power	Continuously variable
Refrigerant	R-454B
Connected (smart) capable	No
On the market since	November 10, 2024
Last certified	April 22, 2026
Cooling
SEER2Seasonal efficiency, higher is better	18.0 (range 18.0)
EER2Efficiency at 95°F outdoors	11.0
Cooling capacity	34,200 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	8.1
Capacity at 47°F	36,000 BTU/h
Capacity at 17°F	25,000 BTU/h
Capacity at 5°F	23,000 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	1.80
ENERGY STAR cold climate	No

Heating output as it gets colder64% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its best matchup at the standard test temperatures, in BTU/h:

Certified matchups1 indoor units

The same outdoor unit scores differently with each indoor unit. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
-	18.0	11.0	8.1	23,000	216011942

Same unit, other model numbers3

These model numbers have exactly the same certified ratings and matchups as the Bosch BPBA-36RCB-M18S: the same equipment under another brand, or a variant code for voltage, colour or market. Everything on this page applies to them.

Bosch BPBB-36RTB-M18S
Midea MRD-36HWD1N10-M18G
Midea MRD-36HWD1N10-M18GB

Yearly running cost in 10 large cities$898-$2,727

Phoenix, AZ$1,152/yr
Miami, FL$898/yr
Houston, TX$1,034/yr
Atlanta, GA$1,109/yr
Los Angeles, CA$1,093/yr
New York, NY$2,727/yr
Chicago, IL$2,229/yr
Denver, CO$1,865/yr
Seattle, WA$1,155/yr
Minneapolis, MN$2,313/yr

At each state's average electricity price and the city's typical heating and cooling hours.

Questions5

What is the SEER2 rating of the Bosch BPBA-36RCB-M18S?: The Bosch BPBA-36RCB-M18S is rated at up to 18.0 SEER2 and 11.0 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with.
Is the Bosch BPBA-36RCB-M18S good for cold climates?: It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 3-ton model.
How much does the Bosch BPBA-36RCB-M18S cost to run per year?: At its rated efficiency it costs about $898-$2,727 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,152 in Phoenix and $2,313 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Is the Bosch BPBA-36RCB-M18S the same as the Bosch BPBB-36RTB-M18S?: Yes, as far as the certified ratings go. ENERGY STAR lists 4 model numbers with identical efficiency, capacity and matchups, which means the same outdoor unit sold under a different brand or with a minor variant code (voltage, colour or region). The full list is on this page.
What refrigerant does the Bosch BPBA-36RCB-M18S use?: It uses R-454B.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $1,167/yrYou save $626/yrSee details ↓

1. Where you live

StateCityElectricity ¢ per kWh

Adjust heating and cooling hours

Filled in from your city's climate. Change them if you run the system much more or less than usual.

Cooling hours full-load hours per yearHeating hours full-load hours per year

2. The heat pump Bosch BPBA-36RCB-M18S

Find a model (fills in the ratings below)

SEER2 cooling efficiencyHSPF2 heating efficiencyCooling capacity BTU/hHeating capacity BTU/h

3. What it replaces

Current heatingFurnace efficiency (AFUE %)Gas price, $/thermCurrent coolingOld AC rating SEER2 (10 ≈ 15+ years old)

4. Price replace the example with your quote

Installed price, $Rebates and incentives, $ utility, state

Heat pump, per year: $1,167
Current system, per year: $1,793
You save per year: $626
Payback: 20.8 years
Net after 10 years: -$6,737

Cooling $669Heating $498Electricity used: 7,291 kWhSaved vs. a minimum-efficiency heat pump: $213

Estimates use the unit's rated SEER2 and HSPF2, full-load hours derived from NOAA 1991-2020 degree days, average residential electricity prices from the U.S. EIA (12 months to July 2026) and fuel prices from EIA (2025 for natural gas, week of 2026-10-05 for propane and heating oil). Very cold days that need backup heat are not modelled. Federal minimum for comparison: 14.3 SEER2 / 7.5 HSPF2.

Similar 3 ton models

MRCOOL MDPH18036D · cold climate18.0 SEER2 · 8.5 HSPF2
York PH9E36N00D2118.0 SEER2 · 8.1 HSPF2
GREE TK-H03TC/NHA-D(U) · cold climate18.0 SEER2 · 8.5 HSPF2
Daikin DHH0361********A16.4 SEER2 · 7.4 HSPF2
ECOER ERDA19H-36AD · cold climate18.3 SEER2 · 9.2 HSPF2
Lennox LHT036H5E*1P16.0 SEER2 · 7.2 HSPF2
Hisense AR-36U3R25U · cold climate18.5 SEER2 · 8.5 HSPF2
Carrier 50VR-K36---3015.5 SEER2 · 7.2 HSPF2

See all 22 3 ton packaged heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of April 22, 2026. How we use the data.