Pioneer / Quantum Ultra
Pioneer Quantum Ultra 23k R-454B 208/230V Mini-Split
The Quantum Ultra 24k certifies 23,000 BTU - size from that, not the model name - and holds SEER2 23 with -13F rated heating at the top of the Ultra range. It is the largest efficient single-zone system Pioneer offers: above this capacity only Diamante Pro continues, and it drops to SEER2 19 and -4F. For a large room in a normal climate this is the ceiling worth buying.
Refrigerant generation
R-454B - current-generation refrigerant
Paid link
$1,768 / Fresh price - checked Jul 24, 2026
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Image: Pioneer
- Last sourced
- Jul 24, 2026
SplitAtlas score
8.3 / 10
(23.0 SEER2) among 24k systems
(9.5 HSPF2) among 24k systems
(74.4% heat retained at 5F; -13 F heating floor) among 24k systems
(34 dBA indoor min / 54 dBA outdoor) among 24k systems
(6 verified features) across the catalogue
($1,768 median retail) among 24k systems
(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
- High-efficiency shortlists; SEER2 is 23.
Install difficulty
- Electrical: 230V; breaker/fuse 25 A.
- Line set: connection type not sourced; max 65 ft.
Alternatives
- GREE Sapphire R32 24,000 BTU R-32 208/230V (SAP24HP230V1R32AH / SAP24HP230V1R32AO)
8.8 score / 22k / SEER2 27 / -22 F heating floor / 230V
Exact destination at HVACDirect: $4,318.00, checked Jul 24, 2026
- Blueridge XS3 High Efficiency 24,000 BTU R-454B 208/230V (BXAFA24WM0 / BXS3A24SC0)
8.8 score / 24k / SEER2 23 / -13 F heating floor / 230V
Exact destination at Alpine Home Air: $1,939.00, checked Jul 24, 2026
- Senville ELITE 24,000 BTU R-454B 208/230V (SENE-24EL-IHH / SENE-24EL-OH)
8.7 score / 24k / SEER2 25 / -22 F heating floor / 187-253V
Exact destination at Senville: $2,099.99, checked Jul 24, 2026
Availability and price context
- Verified current price: $1,768.00 at Pioneer; availability in_stock; checked Jul 24, 2026.
Source date
- Model data sourced
- Jul 24, 2026
- Page reviewed
- Jul 23, 2026
- Source-backed records
- 5
- Newest source retrieved
- Jul 24, 2026
Warranty tiers
Warranty: Up to 10-year Pioneer warranty for registered eligible Quantum Ultra systems.
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
- SEER2 23 sustained at the top of the Quantum Ultra range.
- -13F rated heating for a large space.
Weaknesses
- Certifies 23,000 BTU, not 24,000.
- Above this capacity Pioneer only offers Diamante Pro at SEER2 19 and -4F.
Climate suitability
- Minimum heating ambient
- -13 F[2]
- Rated heating at 5F
- 18,600 BTU/h[4]
- Rated heating at 17F
- 21,000 BTU/h[4]
- Rated heating at 47F
- 25,000 BTU/h[4]
Specifications
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- Manufacturer
- Pioneer
- Brand
- Pioneer
- Product line
- Quantum Ultra
- Model number
- WT024GLSI24HLG indoor / YN024GLSI24RPG outdoor
- Indoor unit model
- WT024GLSI24HLG
- Outdoor unit model
- YN024GLSI24RPG
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 23,000 BTU/h[4]
- Rated heating capacity
- 25,000 BTU/h[4]
- Voltage
- 230 V[1]
- MCA
- not published - manufacturer specifies 25 A breaker
- Maximum fuse or breaker size
- 25 A[1]
- Breaker needed
- 25 A[1]
- SEER2
- 23 SEER2[4]
- EER2
- 11.7 EER2[4]
- HSPF2 (Region 4)
- 9.5 HSPF2[4]
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 1.8 COP[4]
- Minimum outdoor heating temperature
- -13 F[2]
- Minimum outdoor cooling temperature
- 5 F[2]
- Maximum outdoor temperature
- 131 F[2]
- Indoor noise range
- 50/47/43/38/34 dB(A)[2]
- Outdoor noise rating
- 54 dBA[1]
- Indoor weight
- 30.9 lb[1]
- Outdoor weight
- 104.7 lb[1]
- Refrigerant
- R-454B[4]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in liquid / 5/8 in suction
- Included line-set length
- Pioneer full-set product page offers no-kit plus multiple 10/16/25/33/50 ft line-set variants; no single included line-set length applies to the certified system pair.
- Maximum line-set length
- 65 ft[2]
- Max line set per indoor
- not published
- Maximum elevation difference
- 50 ft[2]
- Max height between indoor units
- not published
- Wi-Fi support
- supported[3]
- Energy Star status
- ENERGY STAR certified[5]
- AHRI certification number
- 217048753[4]
- Warranty
- Up to 10-year Pioneer warranty for registered eligible Quantum Ultra systems.
- Install path
- Professional install
- Retail price
- $1,768.00
- Available retailers
- Pioneer
- Manual links
- WYT024GLSI24RL AHRI certificate, WYT024GLSI24RL EnergyGuide, WYT24 installation manual, WYT24 service manual, WYT024GLSI24RL submittal sheet, WYT24 technical brochure
- Specification sheet
- WYT024GLSI24RL submittal sheet
- Last sourced date
- Jul 24, 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
$1,768 / Fresh price - checked Jul 24, 2026
Electrical requirements
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Installation considerations
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- Liquid line
- 1/4 in[1]
- Suction line
- 5/8 in[1]
- Line connection type
- not published
- Precharged length
- not published
- Included line-set length
- Pioneer full-set product page offers no-kit plus multiple 10/16/25/33/50 ft line-set variants; no single included line-set length applies to the certified system pair.
- Maximum line-set length
- 65 ft[2]
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- 43-1/8 x 8-3/4 x 13-1/8 in[1]
- Outdoor dimensions
- 38-1/2 x 16-5/8 x 31-5/8 in[1]
- Indoor weight
- 30.9 lb[1]
- Outdoor weight
- 104.7 lb[1]
- Drain size
- not published
Related systems and guides
- More Pioneer systems
- Pioneer 23k model
- Pioneer 23k model
- MRCOOL 23k model
- Cooper & Hunter Ceiling Cassette 23.4k 230V
- 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 lights blinking
- Mini split weak airflow
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Pioneer Quantum Ultra 23,000 BTU R-454B 208/230V (WT024GLSI24HLG / YN024GLSI24RPG) myself, or do I need a pro?
- Pioneer Quantum Ultra 23,000 BTU R-454B 208/230V (WT024GLSI24HLG / YN024GLSI24RPG) 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 23,000 BTU R-454B 208/230V (WT024GLSI24HLG / YN024GLSI24RPG) keep heating in a cold winter?
- The manufacturer publishes 18,600 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 Pioneer Quantum Ultra 23,000 BTU R-454B 208/230V (WT024GLSI24HLG / YN024GLSI24RPG) need?
- Published electrical requirements: 230 V voltage, not published - manufacturer specifies 25 A breaker 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 65 ft. 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 Mini Split: Quantum Ultra WYT024GLSI24RL product pageSourced - manufacturer product page
Covers Breaker needed, Frequency, Maximum breaker size, Maximum fuse size, Phase, Voltage and more
- Pioneer / Parker Davis HVAC International, Inc.: WYT024GLSI24RL submittal sheetSourced - manufacturer technical document
Covers Maximum cooling current, Maximum heating current, Indoor noise range, Maximum elevation difference, Maximum line-set length, Minimum outdoor cooling temperature and more
- Pioneer Mini Split: Pioneer wall-mounted mini-split model comparison guideSourced - manufacturer product page
Covers Wi-Fi support, Legacy compressor warranty value, Legacy warranty value, Warranty notes
- Air-Conditioning, Heating, and Refrigeration Institute: AHRI Appendix M1 public row for YN024GLSI24RPG / WT024GLSI24HLGSourced - 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 217048753Sourced - Energy Star listing
Covers Energy Star status
Last updated
Jul 23, 2026