Blueridge / Blueridge XS6 Max Efficiency
Blueridge XS6 Max Efficiency 18k R-454B 208/230V Mini-Split
The largest Max Efficiency head is a heating standout, carrying an exceptional 16.2 HSPF2 alongside 25.6 SEER2 and 15 EER2 on R-454B. It's ENERGY STAR certified and cold-climate rated, with heat output rising from 20,000 BTU at 47F to 22,600 BTU at 5F, dipping only to 19,300 BTU at 17F. It's a flagship pick for efficiently heating a larger cold-climate space.
1 zoneProfessional installCurrent
Refrigerant generation
R-454B - current-generation refrigerant
Paid link
$2,359 / Fresh price - checked Jul 24, 2026
Need this installed?
Get installation quotesData completeness: 98%
- Last sourced
- Aug 29, 2026
SplitAtlas score
9.0 / 10
Cooling efficiencyTop 10%
(25.6 SEER2) among 18k systems
Heating efficiencyTop 10%
(16.2 HSPF2) among 18k systems
Cold-weather performanceTop quartile
(100% heat retained at 5F; -22 F heating floor) among 18k systems
NoiseAbove average
(16 dBA indoor min / 61.5 dBA outdoor) among 18k systems
WarrantyBelow average
(5 yr parts / 7 yr compressor) across the catalogue
Feature setTop quartile
(6 verified features) across the catalogue
Price-to-performanceBelow average
($2,359 median retail) among 18k systems
Documentation & partsBelow average
(6 manuals; spec sheet) across the catalogue
Not evaluated
- Installation accessibility — not applicable (professional install)N/A
professional install - DIY-accessibility not applicable
Key ratings
Buyer review snapshot
Best for / skip if
Best for
- Top efficiency shortlists; SEER2 is 25.6.
Install difficulty
Professional flared-line install
- Electrical: 230V; MCA 24.9 A; breaker/fuse 25 A.
- Line set: Flared line connections; precharged 25 ft; max 164 ft.
Availability and price context
- Verified current price: $2,359.00 at Alpine Home Air; availability Not published; checked Jul 24, 2026.
Source date
- Model data sourced
- Aug 29, 2026
- Page reviewed
- Jul 24, 2026
- Source-backed records
- 5
- Newest source retrieved
- Aug 29, 2026
Warranty tiers
Warranty: 5 years parts and 7 years compressor as standard.
Strengths
- Exceptional 16.2 HSPF2 -- one of the best heating efficiency ratings in the catalog.
- Heat climbs to 22,600 BTU at 5F, a real cold-climate boost over the 47F rating.
- ENERGY STAR certified and cold-climate designated on low-GWP R-454B.
Weaknesses
- Flagship-tier pricing at this capacity, so the return favors heavy heating use.
- The value brand's support footprint is thinner than premium names, and a head this size should be professionally installed.
Climate suitability
- Minimum heating ambient
- -22 F[1]
- Rated heating at 5F
- 22,600 BTU/h[3]
- Rated heating at 17F
- 19,300 BTU/h[3]
- Rated heating at 47F
- 20,000 BTU/h[3]
Specifications
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- Manufacturer
- Blueridge
- Brand
- Blueridge
- Product line
- Blueridge XS6 Max Efficiency
- Model number
- BXS6A18WM0 indoor / BXS6A18UC0 outdoor
- Indoor unit model
- BXS6A18WM0
- Outdoor unit model
- BXS6A18UC0
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 18,000 BTU/h[3]
- Rated heating capacity
- 20,000 BTU/h[3]
- Voltage
- 230 V[1]
- MCA
- 24.9 A[1]
- Maximum fuse or breaker size
- 25 A[1]
- Breaker needed
- not published
- SEER2
- 25.6 SEER2[3]
- EER2
- 15 EER2[3]
- HSPF2 (Region 4)
- 16.2 HSPF2[3]
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 2.34 COP[3]
- Minimum outdoor heating temperature
- -22 F[1]
- Minimum outdoor cooling temperature
- -22 F[1]
- Maximum outdoor temperature
- 122 F[1]
- Indoor noise range
- 16 / 27 / 38.5 / 43.5 / 54.5 dB(A)[1]
- Outdoor noise rating
- 61.5 dBA[1]
- Indoor weight
- 19.8 lb[1]
- Outdoor weight
- 130.29 lb[1]
- Refrigerant
- R-454B[3]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 3/8 in liquid / 5/8 in suction
- Included line-set length
- Alpine Blueridge system pages can be paired with different line-set/accessory selections; the AHRI-certified indoor/outdoor pair has no single included line-set length.
- 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
- supported[1]
- Energy Star status
- ENERGY STAR certified[4]
- AHRI certification number
- 216997535[3]
- Warranty
- Standard: 5 yr parts / 7 yr compressor (limited warranty terms). 5-year parts / 7-year compressor limited warranty
- Install path
- Professional install
- Retail price
- $2,359.00
- Available retailers
- Alpine Home Air
- Manual links
- AHRI public directory record 216997535, ENERGY STAR exact check 216997535, Blueridge BXS6A18UC0-18WM Alpine product page capture, Blueridge Blueridge XS6 Max Efficiency product page line-set specifications, HVACDirect exact search outcome BXS6A18UC0-18WM, Blueridge BXS6A18UC0-18WM Alpine product-page specification grid
- Specification sheet
- Blueridge BXS6A18UC0-18WM Alpine product-page specification grid
- Last sourced date
- Aug 29, 2026
Retail purchase context
Some retailer links may earn us a commission at no extra cost; paid relationships never change scores or recommendations. Affiliate disclosure
Paid link
Check price at Alpine Home Air
$2,359 / Fresh price - checked Jul 24, 2026
Installation considerations
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- Liquid line
- 3/8 in[1]
- Suction line
- 5/8 in[1]
- Line connection type
- Flared line connections[2]
- Precharged length
- 25 ft[1]
- Included line-set length
- Alpine Blueridge system pages can be paired with different line-set/accessory selections; the AHRI-certified indoor/outdoor pair has no single included line-set length.
- Maximum line-set length
- 164 ft[1]
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- 46.85 x 14.59 x 11.20 in[1]
- Outdoor dimensions
- 37.24 x 31.89 x 16.14 in[1]
- Indoor weight
- 19.8 lb[1]
- Outdoor weight
- 130.29 lb[1]
- Drain size
- not published
Related systems and guides
- More Blueridge systems
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- Guide library
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- Do mini splits work in cold weather?
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- Mini split not heating
- Mini split indoor unit freezing up
- Mini split remote not working
- Mini split outdoor unit not running
- Mini split not cooling
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Blueridge XS6 Max Efficiency 18,000 BTU R-454B 208/230V (BXS6A18WM0 / BXS6A18UC0) myself, or do I need a pro?
- Blueridge XS6 Max Efficiency 18,000 BTU R-454B 208/230V (BXS6A18WM0 / BXS6A18UC0) 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 Blueridge XS6 Max Efficiency 18,000 BTU R-454B 208/230V (BXS6A18WM0 / BXS6A18UC0) keep heating in a cold winter?
- The manufacturer publishes 22,600 BTU/h of heating output at 5F. Rated heating operation extends down to -22 F. Certified heating efficiency is 16.2 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 Blueridge XS6 Max Efficiency 18,000 BTU R-454B 208/230V (BXS6A18WM0 / BXS6A18UC0) need?
- Published electrical requirements: 230 V voltage, 24.9 A minimum circuit ampacity, and 25 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 25 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 Blueridge XS6 Max Efficiency 18,000 BTU R-454B 208/230V (BXS6A18WM0 / BXS6A18UC0) carry?
- The manufacturer publishes these warranty tiers: Standard: 5 yr parts / 7 yr compressor (limited warranty terms). Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.
Data sources
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- Alpine Home Air Products: Blueridge BXS6A09UC0-9WM Alpine product specification gridSourced - manufacturer technical document
Covers Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase, Voltage, Voltage range and more
- Blueridge / Alpine Home Air Products: Flared line set and professional startup evidenceSourced - manufacturer technical document
Covers Line connection type
- AHRI certificate #216997535 - search the AHRI DirectorySourced - AHRI directory
Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity, HSPF2 (Region 4) and more
- ENERGY STAR: ENERGY STAR exact row check for AHRI 216997533Sourced - Energy Star listing
Covers Energy Star status
- Blueridge / Alpine Home Air Products: Flared line set and professional startup evidenceSourced - manufacturer technical document
Covers system.diy_status, system.installation_type, system.sales_intent
Last updated
Jul 24, 2026