Pioneer / Quantum Ultra
Pioneer Quantum Ultra 48k Four-Way Cassette R-454B 208/230V Mini-Split
The Pioneer Quantum Ultra 48k four-way cassette is the biggest Pioneer cassette in this batch, with 48,000 BTU cooling, 50,000 BTU heating at 47F, 40,500 BTU at 5F, and 19 SEER2.
1 zoneProfessional installCurrent
Refrigerant generation
R-454B - current-generation refrigerant
Paid link
$4,993 / Fresh price - checked Aug 2, 2026
Need this installed?
Get installation quotesData completeness: 100%
- Last sourced
- Aug 2, 2026
SplitAtlas score
7.7 / 10
Cooling efficiencyBelow average
(19.0 SEER2) among >36k systems
Heating efficiencyBelow average
(9.9 HSPF2) among >36k systems
Cold-weather performanceAbove average
(81% heat retained at 5F; -13 F heating floor) among >36k systems
NoiseBottom quartile
(38 dBA indoor min / 64 dBA outdoor) across the catalogue
Feature setAbove average
(6 verified features) across the catalogue
Price-to-performanceBelow average
($4,993 median retail) across the catalogue
Documentation & partsBelow average
(4 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
Install difficulty
Professional install
- Electrical: 230V; MCA 40 A; breaker/fuse 40 A.
Availability and price context
- Verified current price: $4,993.00 at Pioneer; availability in_stock; checked Aug 2, 2026.
Source date
- Model data sourced
- Aug 2, 2026
- Page reviewed
- Aug 12, 2026
- Source-backed records
- 3
- Newest source retrieved
- Aug 2, 2026
Warranty tiers
Warranty: up to 10-year Quantum Ultra warranty coverage
Model context
- Structured ratings
- Certification: ENERGY STAR certified and AHRI cold-climate designated. Refrigerant: current low-GWP R-454B. Minimum heating ambient: -13 F.
Strengths
- Highest cassette capacity captured for Pioneer.
- ENERGY STAR exact row and cold-climate designation are present in the source set.
- 40,500 BTU at 5F is strong absolute cold-weather output.
- Complete official specs include 38 to 56 dB indoor sound and 40A breaker sizing.
Weaknesses
- HSPF2 9.9 and EER2 9.5 are capacity-first, not efficiency-first.
- Large indoor panel and 3/4 gas line require commercial-style planning.
- More expensive than the 36k cassette and less efficient per BTU.
Climate suitability
- Minimum heating ambient
- -13 F[1]
- Rated heating at 5F
- 40,500 BTU/h[2]
- Rated heating at 17F
- 36,600 BTU/h[2]
- Rated heating at 47F
- 50,000 BTU/h[2]
Specifications
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- Manufacturer
- Pioneer
- Brand
- Pioneer
- Product line
- Quantum Ultra
- Model number
- CB048GMSILDFHG indoor / YN048GMSI20RUG outdoor
- Indoor unit model
- CB048GMSILDFHG
- Outdoor unit model
- YN048GMSI20RUG
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 48,000 BTU/h[2]
- Rated heating capacity
- 50,000 BTU/h[2]
- Voltage
- 230 V[1]
- MCA
- 40 A[1]
- Maximum fuse or breaker size
- 40 A[1]
- Breaker needed
- 40 A[1]
- SEER2
- 19 SEER2[2]
- EER2
- 9.5 EER2[2]
- HSPF2 (Region 4)
- 9.9 HSPF2[2]
- HSPF2 (Region 5)
- 7.7 HSPF2[1]
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 2.11 COP[2]
- Minimum outdoor heating temperature
- -13 F[1]
- Minimum outdoor cooling temperature
- 5 F[1]
- Maximum outdoor temperature
- 131 F[1]
- Indoor noise range
- ( Turbo/Hi/Med/Lo/Mute): 56 / 52 / 50 / 42 / 38 dB(A)[1]
- Outdoor noise rating
- 64 dBA[1]
- Indoor weight
- 64.5 lb[1]
- Outdoor weight
- 208.8 lb[1]
- Refrigerant
- R-454B[2]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 3/8 in liquid / 3/4 in suction
- Included line-set length
- Pioneer full-set product page offers multiple no-kit and line-set variants; no single included line-set length applies to the certified system pair.
- Maximum line-set length
- Pioneer product pages in the cached collection did not publish a single maximum line-set length for these full-set variants.
- Max line set per indoor
- not published
- Maximum elevation difference
- Pioneer product pages in the cached collection did not publish a single maximum elevation for these full-set variants.
- Max height between indoor units
- not published
- Wi-Fi support
- supported[1]
- Energy Star status
- ENERGY STAR certified[3]
- AHRI certification number
- 218010992[2]
- Warranty
- up to 10-year Quantum Ultra warranty coverage
- Install path
- Professional install
- Retail price
- $4,993.00
- Available retailers
- Pioneer
- Manual links
- AHRI Active row 218010992, Four-Way Ceiling Cassette installation requirements from Pioneer product technical table, Pioneer® Quantum Ultra™ 48,000 BTU 19 SEER2 230V 4-Way Ceiling Cassette Ductless Mini-Split Air Conditioner Inverter Heat Pump official product page, Pioneer® Quantum Ultra™ 48,000 BTU 19 SEER2 230V 4-Way Ceiling Cassette Ductless Mini-Split Air Conditioner Inverter Heat Pump official product-page technical table
- Specification sheet
- Pioneer® Quantum Ultra™ 48,000 BTU 19 SEER2 230V 4-Way Ceiling Cassette Ductless Mini-Split Air Conditioner Inverter Heat Pump official product-page technical table
- Last sourced date
- Aug 2, 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 Pioneer
$4,993 / Fresh price - checked Aug 2, 2026
Installation considerations
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- Liquid line
- 3/8 in[1]
- Suction line
- 3/4 in[1]
- Line connection type
- not published
- Precharged length
- not published
- Included line-set length
- Pioneer full-set product page offers multiple no-kit and line-set variants; no single included line-set length applies to the certified system pair.
- Maximum line-set length
- Pioneer product pages in the cached collection did not publish a single maximum line-set length for these full-set variants.
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- 32"-5/8 x 32"-5/8 x 11"-3/8 Inches[1]
- Outdoor dimensions
- 37"-1/2 x 16"-3/8 x 52"-1/2 Inches[1]
- Indoor weight
- 64.5 lb[1]
- Outdoor weight
- 208.8 lb[1]
- Drain size
- not published
Related systems and guides
- More Pioneer systems
- Mitsubishi Electric 48k model
- Pioneer Quantum Ultra 48k 230V
- Quantum Ultra Multi-Zone 42k
- Mitsubishi Electric comparison model
- Guide library
- Mini split buying guide
- Single-zone vs multi-zone mini splits
- Troubleshooting
- Do mini splits work in cold weather?
- Pioneer mini split review: is Pioneer any good?
- The best cold-climate mini splits of 2026
- The best mini splits for heating of 2026
- Mini split heating capacity in the cold: what your unit actually delivers at 5F
- The mini split defrost cycle, explained
- The best DIY mini splits of 2026
- What "DIY mini split" actually means
- How to install a mini split (DIY overview)
- R-32 vs R-454B: the mini split refrigerant change explained
- Pioneer mini split not cooling
- Mini split not heating
- Mini split indoor unit freezing up
- Mini split leaking water
- Mini split short cycling
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Pioneer Quantum Ultra Four-Way Ceiling Cassette 48,000 BTU R-454B 208/230V (CB048GMSILDFHG / YN048GMSI20RUG) myself, or do I need a pro?
- Pioneer Quantum Ultra Four-Way Ceiling Cassette 48,000 BTU R-454B 208/230V (CB048GMSILDFHG / YN048GMSI20RUG) 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 Pioneer Quantum Ultra Four-Way Ceiling Cassette 48,000 BTU R-454B 208/230V (CB048GMSILDFHG / YN048GMSI20RUG) keep heating in a cold winter?
- The manufacturer publishes 40,500 BTU/h of heating output at 5F. Rated heating operation extends down to -13 F. Certified heating efficiency is 9.9 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 Pioneer Quantum Ultra Four-Way Ceiling Cassette 48,000 BTU R-454B 208/230V (CB048GMSILDFHG / YN048GMSI20RUG) need?
- Published electrical requirements: 230 V voltage, 40 A minimum circuit ampacity, and 40 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 Pioneer product pages in the cached collection did not publish a single maximum line-set length for these full-set variants.. Longer runs than the included set allows typically mean added refrigerant and a pro visit, so measure the planned routing before ordering.
Data sources
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- Pioneer / Parker Davis HVAC International, Inc.: Pioneer® Quantum Ultra™ 48,000 BTU 17 SEER2 230V Slim-Duct Ceiling Concealed Mini-Split Air Conditioner Inverter Heat Pump Full SetSourced - manufacturer product page
Covers Breaker needed, Frequency, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase and more
- Air-Conditioning, Heating, and Refrigeration Institute: AHRI Active form-factor row 218010992Sourced - AHRI directory
Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity and more
- ENERGY STAR: ENERGY STAR exact row check for AHRI 218010994Sourced - Energy Star listing
Covers Energy Star status
Last updated
Aug 12, 2026