Pioneer / Quantum Ultra
Pioneer Quantum Ultra 18k One-Way Cassette R-454B 208/230V Mini-Split
The Pioneer Quantum Ultra 18k one-way cassette is the best one-way Pioneer performer here, with 22.2 SEER2, 12.2 HSPF2, 18,000 BTU heating at 47F, and 13,100 BTU at 5F.
1 zoneProfessional installCurrent
Refrigerant generation
R-454B - current-generation refrigerant
Paid link
$2,753 / Fresh price - checked Aug 2, 2026
Need this installed?
Get installation quotesData completeness: 100%
- Last sourced
- Aug 2, 2026
SplitAtlas score
8.5 / 10
Cooling efficiencyAbove average
(22.2 SEER2) among 18k systems
Heating efficiencyTop 10%
(12.2 HSPF2) among 18k systems
Cold-weather performanceBelow average
(72.8% heat retained at 5F; -13 F heating floor) among 18k systems
NoiseBelow average
(24 dBA indoor min / 58 dBA outdoor) among 18k systems
Feature setAbove average
(6 verified features) across the catalogue
Price-to-performanceBelow average
($2,753 median retail) among 18k systems
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
Best for / skip if
Best for
- High-efficiency shortlists; SEER2 is 22.2.
Install difficulty
Professional install
- Electrical: 230V; MCA 20 A; breaker/fuse 20 A.
Alternatives
- Blueridge XS6 Max Efficiency 18,000 BTU R-454B 208/230V (BXS6A18WM0 / BXS6A18UC0)
9.0 score / 18k / SEER2 25.6 / -22 F heating floor / 230V
Exact destination at Alpine Home Air: $2,359.00, checked Jul 24, 2026
- Senville ELITE 18,000 BTU R-454B 208/230V (SENE-18EL-IHH / SENE-18EL-OH)
8.9 score / 18k / SEER2 25.6 / -22 F heating floor / 187-253V
Exact destination at Senville: $1,899.99, checked Jul 24, 2026
- ACiQ Standard 18,000 BTU R-454B 208/230V (ACIQ-18WS-HP230C / ACIQ-18ZS-HP230C)
8.8 score / 18k / SEER2 24 / -13 F heating floor / 230V
Exact destination at HVACDirect: $1,299.99, checked Jul 26, 2026
Availability and price context
- Verified current price: $2,753.00 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
- Strongest HSPF2 in Pioneer's single-zone one-way cassette set.
- Complete official specs include 24 to 48 dB indoor sound and 20A breaker sizing.
- Higher capacity without losing the recessed one-way form factor.
- ENERGY STAR certified.
Weaknesses
- 5F heat still falls materially below the 47F rating.
- Higher direct price than comparable Senville one-way capacity.
- One-way airflow should be matched to room shape; it is not a generic open-plan cassette.
Climate suitability
- Minimum heating ambient
- -13 F[1]
- Rated heating at 5F
- 13,100 BTU/h[2]
- Rated heating at 17F
- 14,000 BTU/h[2]
- Rated heating at 47F
- 18,000 BTU/h[2]
Specifications
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- Manufacturer
- Pioneer
- Brand
- Pioneer
- Product line
- Quantum Ultra
- Model number
- CK018GMSILDFHG indoor / YN018GMSI24RPG outdoor
- Indoor unit model
- CK018GMSILDFHG
- Outdoor unit model
- YN018GMSI24RPG
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 18,000 BTU/h[2]
- Rated heating capacity
- 18,000 BTU/h[2]
- Voltage
- 230 V[1]
- MCA
- 20 A[1]
- Maximum fuse or breaker size
- 20 A[1]
- Breaker needed
- 20 A[1]
- SEER2
- 22.2 SEER2[2]
- EER2
- 12.5 EER2[2]
- HSPF2 (Region 4)
- 12.2 HSPF2[2]
- HSPF2 (Region 5)
- 8.6 HSPF2[1]
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 2.24 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): 48 / 44 / 41 / 30 / 24 dB(A)[1]
- Outdoor noise rating
- 58 dBA[1]
- Indoor weight
- 45.5 lb[1]
- Outdoor weight
- 92.6 lb[1]
- Refrigerant
- R-454B[2]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in liquid / 1/2 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
- 218010988[2]
- Warranty
- up to 10-year Quantum Ultra warranty coverage
- Install path
- Professional install
- Retail price
- $2,753.00
- Available retailers
- Pioneer
- Manual links
- AHRI Active row 218010988, One-Way Ceiling Cassette installation requirements from Pioneer product technical table, Pioneer® Quantum Ultra™ 18,000 BTU 22 SEER2 230V Single-Way Ceiling Recessed Cassette Ductless Mini-Split Air Conditioner Inverter Heat Pump Full Set official product page, Pioneer® Quantum Ultra™ 18,000 BTU 22 SEER2 230V Single-Way Ceiling Recessed Cassette Ductless Mini-Split Air Conditioner Inverter Heat Pump Full Set official product-page technical table
- Specification sheet
- Pioneer® Quantum Ultra™ 18,000 BTU 22 SEER2 230V Single-Way Ceiling Recessed Cassette Ductless Mini-Split Air Conditioner Inverter Heat Pump Full Set 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
$2,753 / Fresh price - checked Aug 2, 2026
Installation considerations
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- Liquid line
- 1/4 in[1]
- Suction line
- 1/2 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
- 50"-3/8 x 13"-1/4 x 10" Inches[1]
- Outdoor dimensions
- 35" x 13"-1/2 x 26"-1/2 Inches[1]
- Indoor weight
- 45.5 lb[1]
- Outdoor weight
- 92.6 lb[1]
- Drain size
- not published
Related systems and guides
- More Pioneer systems
- Pioneer 18k model
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- Pioneer 230 V option
- 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 18,000 BTU mini splits of 2026
- 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)
- Pioneer mini split not cooling
- Mini split not heating
- Mini split indoor unit freezing up
- Mini split lights blinking
- Mini split making loud noise
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Pioneer Quantum Ultra One-Way Ceiling Cassette 18,000 BTU R-454B 208/230V (CK018GMSILDFHG / YN018GMSI24RPG) myself, or do I need a pro?
- Pioneer Quantum Ultra One-Way Ceiling Cassette 18,000 BTU R-454B 208/230V (CK018GMSILDFHG / YN018GMSI24RPG) 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 One-Way Ceiling Cassette 18,000 BTU R-454B 208/230V (CK018GMSILDFHG / YN018GMSI24RPG) keep heating in a cold winter?
- The manufacturer publishes 13,100 BTU/h of heating output at 5F. Rated heating operation extends down to -13 F. Certified heating efficiency is 12.2 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 Pioneer Quantum Ultra One-Way Ceiling Cassette 18,000 BTU R-454B 208/230V (CK018GMSILDFHG / YN018GMSI24RPG) need?
- Published electrical requirements: 230 V voltage, 20 A minimum circuit ampacity, and 20 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 218010988Sourced - 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