SplitAtlas

Bosch / Climate 5000 Gen 4

Bosch Climate 5000 G4 36k R-454B Mini-Split

Certified capacity
36,000 BTU/h[2]
SEER2
19 SEER2[2]
Heating floor
-13 F[1]
Voltage
230 V[1]
Install path
Professional install

The 36k is the largest head Bosch builds in this range, and it is unapologetically a capacity tool: one indoor unit that can condition a demanding light-commercial space. It delivers 36,000 BTU of heat at 47F and still 22,000 BTU at 5F, so it keeps working in the cold even though it carries neither the ENERGY STAR nor the cold-climate label.

Efficiency is where it gives ground - a 19 SEER2 and a notably low 8.6 EER2 mean higher running costs, especially on the hottest, highest-demand afternoons. This is equipment you choose when you need maximum single-head output and are willing to trade efficiency for it; it is dealer-installed on current R-454B refrigerant.

1 zoneProfessional installCurrent

Refrigerant generation

R-454B - current-generation refrigerant

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Error Codes
Bosch Climate 5000 Gen 4 R-454B wall-mounted indoor unit (BMS500-AAU012-1AHWXD) for Bosch Climate 5000 Gen 4 R-454B 36,000 BTU Light Commercial (BMS500-AAU036-1AHWXD / BMS500-AAS036-1CSXRD)

Image: Hydrowest Products

Data completeness: 90%
Last sourced
Jul 26, 2026

SplitAtlas score

7.3 / 10

Methodology
Cooling efficiencyBottom quartile

(19.0 SEER2) among 36k systems

Heating efficiencyBottom quartile

(8.5 HSPF2) among 36k systems

Cold-weather performanceBottom quartile

(5F certified capacity: 61.1% of the 47F rating; -13 F heating floor) among 36k systems

WarrantyTop quartile

(10 yr parts / 10 yr compressor) across the catalogue

Feature setBottom quartile

(2 verified features) across the catalogue

Documentation & partsBottom quartile

(6 manuals) across the catalogue

Not evaluated

  • Installation accessibility — not applicable (professional install)N/A

    professional install - DIY-accessibility not applicable

  • Price-to-value — not evaluatedN/A

    This is a professionally installed, quote-only system, so we can't score its price. Get an installed quote to compare real cost.

    Get a quote

Key ratings

Rated cooling

36,000BTU/h[2]

Rated heating

36,000BTU/h[2]

Buyer review snapshot

Install difficulty

Professional install
  • Electrical: 230V; MCA 33 A; breaker/fuse 35 A.
  • Line set: connection type not sourced; precharged 24.6 ft; max 213.2 ft.

Alternatives

Availability and price context

This system needs a professional install, so its real price is an installed quote that depends on your home. We don't link to a listing for this exact model; get installation quotes to price it.

Source date

Model data sourced
Jul 26, 2026
Page reviewed
Jul 22, 2026
Source-backed records
5
Newest source retrieved
Jul 26, 2026

Warranty tiers

Base
10 yr parts / 10 yr compressor - limited residential warranty terms

The score uses Base. Additional published terms are shown for reference and not counted in the score.

Review methodology

Strengths

  • The largest single-head capacity in the lineup at 36,000 BTU, for demanding spaces.
  • Still delivers 22,000 BTU of heat at 5F despite no cold-climate designation.
  • Current R-454B refrigerant, with Bosch's dealer network and warranty behind it.

Weaknesses

  • A low 8.6 EER2 means weak peak-demand cooling efficiency and higher running costs.
  • Neither ENERGY STAR certified nor cold-climate rated.

Climate suitability

Minimum heating ambient
-13 F[1]
Certified heating at 5F
22,000 BTU/h[2]
Rated heating at 17F
24,200 BTU/h[2]
Rated heating at 47F
36,000 BTU/h[2]

Specifications

Show
Manufacturer
Bosch
Brand
Bosch
Product line
Climate 5000 Gen 4
Model number
BMS500-AAU036-1AHWXD indoor / BMS500-AAS036-1CSXRD outdoor
Indoor unit model
BMS500-AAU036-1AHWXD
Outdoor unit model
BMS500-AAS036-1CSXRD
Number of zones
1
Max indoor units
not published
Rated cooling capacity
36,000 BTU/h[2]
Rated heating capacity
36,000 BTU/h[2]
Voltage
230 V[1]
MCA
33 A[1]
Maximum fuse or breaker size
35 A[1]
Breaker needed
not published
SEER2
19 SEER2[2]
EER2
8.6 EER2[2]
HSPF2 (Region 4)
8.5 HSPF2[2]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
2.85 COP[1]
COP at 5F
1.9 COP[2]
Minimum outdoor heating temperature
-13 F[1]
Minimum outdoor cooling temperature
-13 F[1]
Maximum outdoor temperature
122 F[1]
Indoor noise range
not published
Outdoor noise rating
63 dBA[1]
Indoor weight
43.21 lb[1]
Outdoor weight
150.35 lb[1]
Refrigerant
R-454B[2]
Refrigerant charge
112.88 oz[1]
Manufacturer coverage
not published
Line-set size
3/8 in liquid / 5/8 in suction
Included line-set length
Bosch submittals publish field piping sizes and precharged refrigerant length, but do not specify an included line set for these professional-install systems.
Maximum line-set length
213.2 ft[1]
Max line set per indoor
not published
Maximum elevation difference
98.4 ft[1]
Max height between indoor units
not published
Wi-Fi support
not published
Energy Star status
Not ENERGY STAR certified[4]
AHRI certification number
215223310[2]
Warranty
Base: 10 yr parts / 10 yr compressor (limited residential warranty terms). Score uses Base.. 10-year compressor / 10-year parts limited residential warranty; terms and field-installed component limits apply.
Install path
Professional install
Retail price
Installed quote only
Available retailers
not published
Manual links
AHRI public directory record 215223310, ENERGY STAR exact check 215223310, Climate 5000 Ductless System Mini-Split Heat Pump (R-454B Version), Bosch Climate 5000 ductless mini-split submittal sheet directory, BMS500-AAU036-1AHWXD & BMS500-AAS036-1CSXRD Bosch Climate 5000 Gen 4 R-454B submittal
Specification sheet
not published
Last sourced date
Jul 26, 2026

Electrical requirements

Show
Voltage
230 V[1]
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
33 A[1]
Breaker needed
not published
Maximum breaker size
35 A[1]
Maximum fuse size
35 A[1]
Maximum cooling current
not published
Maximum heating current
not published
Manufacturer wire notes
not published

Installation considerations

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Liquid line
3/8 in[1]
Suction line
5/8 in[1]
Line connection type
not published
Precharged length
24.6 ft[1]
Included line-set length
Bosch submittals publish field piping sizes and precharged refrigerant length, but do not specify an included line set for these professional-install systems.
Maximum line-set length
213.2 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
44.88 x 11.22 x 14.61 in[1]
Outdoor dimensions
37.24 x 16.14 x 31.89 in[1]
Indoor weight
43.21 lb[1]
Outdoor weight
150.35 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Bosch Climate 5000 Gen 4 R-454B 36,000 BTU Light Commercial (BMS500-AAU036-1AHWXD / BMS500-AAS036-1CSXRD) myself, or do I need a pro?
Bosch Climate 5000 Gen 4 R-454B 36,000 BTU Light Commercial (BMS500-AAU036-1AHWXD / BMS500-AAS036-1CSXRD) is built for professional installation: the line set must be flared, evacuated, and charged, which requires EPA-certified refrigerant handling. Installing it outside the manufacturer's requirements can void the warranty, so budget for a qualified HVAC installer.
Will the Bosch Climate 5000 Gen 4 R-454B 36,000 BTU Light Commercial (BMS500-AAU036-1AHWXD / BMS500-AAS036-1CSXRD) keep heating in a cold winter?
The AHRI/ENERGY STAR certification lists 22,000 BTU/h of heating capacity at 5F. Rated heating operation extends down to -13 F. Certified heating efficiency is 8.5 HSPF2. Match those numbers against your climate's design temperature - in cold regions, output at 5F matters far more than the nameplate capacity measured at 47F.
What electrical circuit does the Bosch Climate 5000 Gen 4 R-454B 36,000 BTU Light Commercial (BMS500-AAU036-1AHWXD / BMS500-AAS036-1CSXRD) need?
Published electrical requirements: 230 V voltage, 33 A minimum circuit ampacity, and 35 A maximum breaker or fuse sizing. Confirm the final circuit against the unit nameplate and local code with a licensed electrician.
How far can the outdoor unit be from the indoor head?
The published maximum line-set length is 213.2 ft. The outdoor unit's factory charge covers up to 24.6 ft of line; longer runs need added refrigerant. Measure the planned routing before ordering.
What warranty does the Bosch Climate 5000 Gen 4 R-454B 36,000 BTU Light Commercial (BMS500-AAU036-1AHWXD / BMS500-AAS036-1CSXRD) carry?
The manufacturer publishes these warranty tiers: Base: 10 yr parts / 10 yr compressor (limited residential warranty terms). Score uses Base.. Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.

Data sources

Show
  1. Bosch Thermotechnology Corp.: BMS500-AAU036-1AHWXD & BMS500-AAS036-1CSXRD Bosch Climate 5000 Gen 4 submittalSourced - manufacturer technical document

    Covers Frequency, electrical_spec.indoor_mca_amps, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase and more

  2. AHRI Directory: AHRI public directory record 215223310Sourced - AHRI directory

    Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity, HSPF2 (Region 4) and more

  3. Air-Conditioning, Heating, and Refrigeration Institute: AHRI Appendix M1 public detail for BMS500-AAS036-1CSXRD / BMS500-AAU036-1AHWXDSourced - AHRI directory

    Covers performance_spec.cold_climate_designation, system.lifecycle_status

  4. ENERGY STAR: ENERGY STAR exact row check for AHRI 215223310Sourced - Energy Star listing

    Covers Energy Star status

  5. Bosch Thermotechnology Corp.: Climate 5000 Ductless System Mini-Split Heat Pump (R-454B Version) manufacturer pageSourced - manufacturer product page

    Covers Legacy compressor warranty value, Legacy warranty value, Base compressor warranty, Base warranty conditions, Base parts warranty, Warranty notes

Last updated

Jul 22, 2026