Pioneer / Quantum Ultra
Pioneer Quantum Ultra 12k 115V Mini-Split
Pioneer's Quantum Ultra 12k occupies an interesting middle: sold online at direct-buy prices, but its installation manual requires flared connections and system evacuation - which makes it a professional install despite the marketing vibe. On paper it delivers solid certified efficiency and a -13F heating floor on a 115V circuit.
1 zoneProfessional installCurrent
Refrigerant generation
R-454B - current-generation refrigerant
Paid link
$1,163 / Checked Jul 18, 2026
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Image: Pioneer
Data completeness: 98%
- Last sourced
- Jul 18, 2026
SplitAtlas score
8.1 / 10
Cooling efficiencyAbove average
(23.0 SEER2) among 12k systems
Heating efficiencyTop quartile
(10.0 HSPF2) among 12k systems
Cold-weather performanceAbove average
(-13 F heating floor) among 12k systems
NoiseBottom quartile
(30 dBA indoor min / 52 dBA outdoor) among 12k systems
WarrantyBottom quartile
(5 yr parts / 5 yr compressor) across the catalogue
Price-to-performanceBelow average
($1,163 median retail) among 12k 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
- Homes planning around a 110-120V branch circuit.
Install difficulty
Professional install
- Electrical: 110-120V; breaker/fuse 25 A.
- Line set: connection type not sourced; precharged 25 ft; included 10 ft; max 50 ft.
Alternatives
- Blueridge XS6 Max Efficiency 12,000 BTU R-454B 208/230V (BXS6A12WM0 / BXS6A12UC0)
9.0 score / 12k / SEER2 29.4 / -22 F heating floor / 230V
Exact destination at Alpine Home Air: $1,979.00, checked Jul 24, 2026
- Senville ELITE 12,000 BTU R-454B 208/230V (SENE-12EL-IHH / SENE-12EL-OH)
8.9 score / 12k / SEER2 29.4 / -22 F heating floor / 187-253V
Exact destination at Senville: $1,699.99, checked Jul 24, 2026
- ACiQ Extreme 12,000 BTU R-454B 208/230V (ACIQ-12W-HH-MD / ACIQ-12ZPL-HP230C)
8.9 score / 12k / SEER2 25.4 / -22 F heating floor / 230V
Exact destination at HVACDirect: $1,649.99, checked Jul 26, 2026
Availability and price context
- Last seen at Pioneer Mini Split on Jul 18, 2026: $1,163.00. Open the listing for today's price.
Source date
- Model data sourced
- Jul 18, 2026
- Page reviewed
- Jul 18, 2026
- Source-backed records
- 3
- Newest source retrieved
- Jul 18, 2026
Warranty tiers
- Registered
- 5 yr parts / 5 yr compressor - registration within 90 days
The score uses Registered. Additional published terms are shown for reference and not counted in the score.
Strengths
- 115V operation with a -13F published heating floor.
- Solid certified efficiency for the price class.
- Attractive online pricing.
Weaknesses
- NOT a DIY install despite the price positioning: the manual requires flare, vacuum, and charge verification - budget for a pro or the skills and tools to do it right.
- Warranty expectations follow qualified installation - an improvised install risks coverage.
- Documentation depth trails MRCOOL and Senville.
Climate suitability
- Minimum heating ambient
- -13 F[2]
- Certified heating at 5F
- not published
- Rated heating at 17F
- not published
- Rated heating at 47F
- not published
Specifications
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- Manufacturer
- Pioneer
- Brand
- Pioneer
- Product line
- Quantum Ultra
- Model number
- WT012ALSI24HLG indoor / YN012ALSI24RPG outdoor
- Indoor unit model
- WT012ALSI24HLG
- Outdoor unit model
- YN012ALSI24RPG
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 12,000 BTU/h[2]
- Rated heating capacity
- 12,400 BTU/h[2]
- Voltage
- 110-120V[2]
- MCA
- not published - manufacturer specifies 25 A breaker
- Maximum fuse or breaker size
- not published
- Breaker needed
- 25 A[1]
- SEER2
- 23 SEER2[2]
- EER2
- 13 EER2[2]
- HSPF2 (Region 4)
- 10 HSPF2[2]
- HSPF2 (Region 5)
- 8.6 HSPF2[2]
- COP
- not published
- COP at 47F
- 3.81 COP[2]
- COP at 5F
- 2.1 COP[2]
- Minimum outdoor heating temperature
- -13 F[2]
- Minimum outdoor cooling temperature
- not published
- Maximum outdoor temperature
- 131 F[2]
- Indoor noise range
- 46/44/36/32/30 dB(A)[2]
- Outdoor noise rating
- 52 dBA[2]
- Indoor weight
- 23.1 lb[2]
- Outdoor weight
- 58.4 lb[2]
- Refrigerant
- R-454B[2]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in liquid / 3/8 in suction
- Included line-set length
- 10 ft[2]
- Maximum line-set length
- 50 ft[1]
- Max line set per indoor
- not published
- Maximum elevation difference
- 33 ft[1]
- Max height between indoor units
- not published
- Wi-Fi support
- supported[2]
- Energy Star status
- ENERGY STAR certified[2]
- AHRI certification number
- 217048750[2]
- Warranty
- Registered: 5 yr parts / 5 yr compressor (registration within 90 days). Score uses Registered.. Up to 5-year parts plus 5-year compressor, registration within 90 days.
- Install path
- Professional install
- Retail price
- $1,163.00
- Available retailers
- Pioneer
- Manual links
- WYT24-IMUM-2501.pdf, WYT24-SERM-2501.pdf, WYT012ALSI24RL_SubmittalSheet.pdf, WYT24-BROC-2501.pdf
- Specification sheet
- WYT012ALSI24RL_SubmittalSheet.pdf
- Last sourced date
- Jul 18, 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
$1,163 at Pioneer
$1,163 / Checked Jul 18, 2026
Electrical requirements
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- Voltage
- not published
- Voltage range
- 110-120V[2]
- Phase
- 1[2]
- Frequency
- 60 Hz[2]
- MCA
- not published - manufacturer specifies 25 A breaker
- Breaker needed
- 25 A[1]
- Maximum breaker size
- not published
- Maximum fuse size
- not published
- Maximum cooling current
- 8.5 A[2]
- Maximum heating current
- 8.4 A[2]
- Manufacturer wire notes
- not published
Installation considerations
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- Liquid line
- 1/4 in[1]
- Suction line
- 3/8 in[1]
- Line connection type
- not published
- Precharged length
- 25 ft[1]
- Included line-set length
- 10 ft[2]
- Maximum line-set length
- 50 ft[1]
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- 36.5 x 7.625 x 12 in[2]
- Outdoor dimensions
- 31.875 x 12 x 21.625 in[2]
- Indoor weight
- 23.1 lb[2]
- Outdoor weight
- 58.4 lb[2]
- Drain size
- not published
Comparable models
Related systems and guides
- More Pioneer systems
- Pioneer Quantum Hyperformance 12k R-454B 208/230V Mini-Split
- Pioneer Quantum Ultra 12k R-454B 208/230V Mini-Split
- Pioneer Quantum Fresh 12k R-32 208/230V Mini-Split
- Pioneer Quantum Ultra 12k Ceiling Cassette R-454B 208/230V Mini-Split
- Guide library
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- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Pioneer Quantum Ultra 12,000 BTU (115V) myself, or do I need a pro?
- Pioneer Quantum Ultra 12,000 BTU (115V) 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 12,000 BTU (115V) keep heating in a cold winter?
- Rated heating operation extends down to -13 F. Certified heating efficiency is 10 HSPF2. Match that published heating floor against your climate's design temperature - below the low-ambient rating, output can fall off or the system can pause to protect itself.
- What electrical circuit does the Pioneer Quantum Ultra 12,000 BTU (115V) need?
- Published electrical requirements: 110-120V voltage. 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 50 ft. The outdoor unit's factory charge covers up to 25 ft of line; longer runs need added refrigerant. A 10 ft line set is included. Longer runs than the included set allows require a different line set, so measure the planned routing before ordering.
- What warranty does the Pioneer Quantum Ultra 12,000 BTU (115V) carry?
- The manufacturer publishes these warranty tiers: Registered: 5 yr parts / 5 yr compressor (registration within 90 days). Score uses Registered.. Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.
Data sources
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- Pioneer: WYT012ALSI24RL_SubmittalSheet.pdfSourced - manufacturer technical document
Covers Breaker needed, Liquid line size, Maximum elevation difference, Maximum line-set length, Precharged length, Suction line size
- Pioneer: pioneerminisplit.com Quantum Ultra 12k 115V pageSourced - manufacturer product page
Covers Frequency, Maximum cooling current, Maximum heating current, Phase, Voltage range, Included line-set length and more
- Pioneer/Parker Davis HVAC: WYT24-IMUM-2501 installation manual (parsed 2026-07-18)Sourced - manufacturer technical document
Covers system.sales_intent
Last updated
Jul 18, 2026