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Bosch / Climate 5000 Gen 4

Bosch Climate 5000 G4 30k R-454B Mini-Split

Certified capacity
30,000 BTU/h[2]
SEER2
20.5 SEER2[2]
Heating floor
-13 F[1]
Voltage
230 V[1]
Install path
Professional install

The 30k opens Bosch's Light Commercial tier, and the job here is raw capacity rather than winter specialization - a single head sized for a big room, a retail suite, or an open office. It puts out 30,000 BTU of heat at 47F and levels off around 20,000 BTU from 17F down to 5F, so warmth stays steady in the cold even though this one skips the cold-climate designation.

It is ENERGY STAR certified and efficient enough for its size at 20.5 SEER2, but its heating-season rating (HSPF2 9.5) is modest - you are buying it for how much space it can cover, not for best-in-class efficiency. As with the rest of the range, 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 30,000 BTU Light Commercial (BMS500-AAU030-1AHWXD / BMS500-AAS030-1CSXRD)

Image: Hydrowest Products

Data completeness: 92%
Last sourced
Jul 26, 2026

SplitAtlas score

8.3 / 10

Methodology
Cooling efficiencyAbove average

(20.5 SEER2) among 36k systems

Heating efficiencyAbove average

(9.5 HSPF2) among 36k systems

Cold-weather performanceBelow average

(66.7% heat retained at 5F; -13 F heating floor) among 36k systems

NoiseTop 10%

(-53 dBA indoor min / 61 dBA outdoor) among 36k systems

WarrantyAbove average

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

Feature setBelow average

(4 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

30,000BTU/h[2]

Rated heating

30,000BTU/h[2]

Buyer review snapshot

Install difficulty

Professional install
  • Electrical: 230V; MCA 28 A; breaker/fuse 30 A.
  • Line set: connection type not sourced; precharged 24.6 ft; max 164 ft.

Alternatives

Availability and price context

We could not verify a current retail price for this model. We could not find a published consumer price for this model when we last checked on 2026-07-26.

Source date

Model data sourced
Jul 26, 2026
Page reviewed
Jul 26, 2026
Source-backed records
4
Newest source retrieved
Jul 26, 2026

Warranty tiers

Warranty: 10 years parts and compressor as standard.

Review methodology

Strengths

  • High 30k capacity heats or cools a big room or light-commercial space from a single head.
  • Heat holds steady between 17F and 5F (about 20,000 BTU) even without a cold-climate label.
  • ENERGY STAR certified on current R-454B, with Bosch dealer and warranty support.

Weaknesses

  • Not cold-climate designated, and output drops noticeably from 47F to 17F before it levels off.
  • Modest heating-season efficiency (HSPF2 9.5) for the capacity.

Climate suitability

Minimum heating ambient
-13 F[1]
Rated heating at 5F
20,000 BTU/h[2]
Rated heating at 17F
20,400 BTU/h[2]
Rated heating at 47F
30,000 BTU/h[2]

Specifications

Show
Manufacturer
Bosch
Brand
Bosch
Product line
Climate 5000 Gen 4
Model number
BMS500-AAU030-1AHWXD indoor / BMS500-AAS030-1CSXRD outdoor
Indoor unit model
BMS500-AAU030-1AHWXD
Outdoor unit model
BMS500-AAS030-1CSXRD
Number of zones
1
Max indoor units
not published
Rated cooling capacity
30,000 BTU/h[2]
Rated heating capacity
30,000 BTU/h[2]
Voltage
230 V[1]
MCA
28 A[1]
Maximum fuse or breaker size
30 A[1]
Breaker needed
not published
SEER2
20.5 SEER2[2]
EER2
12 EER2[2]
HSPF2 (Region 4)
9.5 HSPF2[2]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
3.08 COP[1]
COP at 5F
2.03 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
19.5-53 dB(A)[1]
Outdoor noise rating
61 dBA[1]
Indoor weight
43.21 lb[1]
Outdoor weight
142.86 lb[1]
Refrigerant
R-454B[2]
Refrigerant charge
84.66 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
164 ft[1]
Max line set per indoor
not published
Maximum elevation difference
82 ft[1]
Max height between indoor units
not published
Wi-Fi support
not published
Energy Star status
ENERGY STAR certified[3]
AHRI certification number
215223309[2]
Warranty
Standard: 10 yr parts / 10 yr compressor (limited residential warranty terms). 10-year compressor / 10-year parts limited residential warranty; terms and field-installed component limits apply.
Install path
Professional install
Retail price
We could not find a published consumer price for this model when we last checked on 2026-07-26.
Available retailers
not published
Manual links
AHRI public directory record 215223309, ENERGY STAR exact check 215223309, Climate 5000 Ductless System Mini-Split Heat Pump (R-454B Version), Bosch Climate 5000 ductless mini-split submittal sheet directory, BMS500-AAU030-1AHWXD & BMS500-AAS030-1CSXRD Bosch Climate 5000 Gen 4 R-454B submittal, HVACDirect exact Bosch offer check bosch-climate-5000-r454b-30k-light-commercial-230v
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
28 A[1]
Breaker needed
not published
Maximum breaker size
30 A[1]
Maximum fuse size
30 A[1]
Maximum cooling current
not published
Maximum heating current
not published
Manufacturer wire notes
not published

Installation considerations

Show
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
164 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
142.86 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Bosch Climate 5000 Gen 4 R-454B 30,000 BTU Light Commercial (BMS500-AAU030-1AHWXD / BMS500-AAS030-1CSXRD) myself, or do I need a pro?
Bosch Climate 5000 Gen 4 R-454B 30,000 BTU Light Commercial (BMS500-AAU030-1AHWXD / BMS500-AAS030-1CSXRD) 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 30,000 BTU Light Commercial (BMS500-AAU030-1AHWXD / BMS500-AAS030-1CSXRD) keep heating in a cold winter?
The manufacturer publishes 20,000 BTU/h of heating output at 5F. Rated heating operation extends down to -13 F. Certified heating efficiency is 9.5 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 30,000 BTU Light Commercial (BMS500-AAU030-1AHWXD / BMS500-AAS030-1CSXRD) need?
Published electrical requirements: 230 V voltage, 28 A minimum circuit ampacity, and 30 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 164 ft, and the included line set comes pre-charged for 24.6 ft. Longer runs than the included set allows typically mean added refrigerant and a pro visit, so measure the planned routing before ordering.
What warranty does the Bosch Climate 5000 Gen 4 R-454B 30,000 BTU Light Commercial (BMS500-AAU030-1AHWXD / BMS500-AAS030-1CSXRD) carry?
The manufacturer publishes these warranty tiers: Standard: 10 yr parts / 10 yr compressor (limited residential warranty terms). 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-AAU030-1AHWXD & BMS500-AAS030-1CSXRD 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. Air-Conditioning, Heating, and Refrigeration Institute: AHRI Appendix M1 public detail for BMS500-AAS030-1CSXRD / BMS500-AAU030-1AHWXDSourced - AHRI directory

    Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity and more

  3. ENERGY STAR: ENERGY STAR exact row check for AHRI 215223309Sourced - Energy Star listing

    Covers Energy Star status

  4. Bosch Thermotechnology Corp.: Climate 5000 R-454B limited residential warranty statementSourced - manufacturer product page

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

Last updated

Jul 26, 2026