Pioneer® Quantum Ultra™ 12,000 BTU 23 SEER2 115V High-Wall Ductless Mini-Split Air Conditioner Inverter Heat Pump Full Set

High-Efficiency Comfort for Every Season – Heating & Cooling in One System

Upgrade your home or workspace with the Pioneer® Quantum Ultra™ 12,000 BTU 23 SEER2 115V High-Wall Ductless Mini-Split System—a premium, energy-efficient solution designed for year-round comfort, lower energy bills, and ultra-quiet operation. Whether you're cooling a bedroom, office, condo, or small commercial space, this Energy Star certified mini-split heat pump delivers powerful performance with advanced inverter technology.

Summary at a Glance

• Ultra High Efficiency Quantum Ultra Ductless Mini Split Heat Pump System
• Cooling capacity: 12,000 BTU/H with 23 SEER2 / 13 EER2 efficiency
• Heating capacity: 12,400 BTU/H with 10 HSPF2 / 3.81 COP2 efficiency
• Voltage: 110/120V, 60Hz, 1Ph
• High Wall-Mounted Ductless Air Conditioning & Heating System
• Wi-Fi Enabled and Controllable By Smartphone via the Free Pioneer Airlink App
• Variable-Speed DC Inverter Driven Performance
• Factory-Precharged with Environmentally Friendly R454b Refrigerant
• Ultra Low Ambient Range Operation (As low as -13°F in Heating / As high as 131°F in Cooling)

Key Features & Benefits

12,000 BTU Cooling & Heating Capacity

Perfect for rooms up to ~450–550 sq. ft.—ideal for bedrooms, living areas, apartments, and offices.

23 SEER2 Ultra-High Efficiency Rating

Save significantly on electricity bills with one of the most energy-efficient ductless mini-split systems available.

115V Power Supply

Designed for easy installation in standard outlets—no need for costly electrical upgrades.

Inverter Heat Pump Technology

Enjoy precise temperature control, faster cooling/heating, and reduced energy consumption compared to traditional systems.

Energy Star Certified

Meets strict efficiency standards—great for eco-conscious buyers looking to reduce their carbon footprint.

Whisper-Quiet Operation

Engineered for ultra-low noise levels, making it perfect for bedrooms, nurseries, and workspaces.

High-Wall Mounted Indoor Unit

Sleek, modern design blends seamlessly into any interior décor.

All-Season Comfort

Reliable cooling in summer and heating in winter, even in low ambient temperatures.

Why Choose the Pioneer Quantum Ultra™ Mini-Split?

• Buy now and save on energy costs with 23 SEER2 efficiency
• Perfect DIY-friendly mini-split option (professional installation recommended)
• No ductwork required—ideal for renovations and new builds
• Fast cooling & heating performance with inverter-driven compressor
• Trusted Pioneer brand known for durability, innovation, and value
• Heat Pump with Cooling, Heating, Dry, and Ventilation Modes
• Dual-Drainage Ports
• Washable, Reusable Air Filters
• Dual-Axis Airflow (Motorized Up-Down and Left-Right Louvers
• Functional Remote with:
  • ECO and SLEEP Modes, for Energy-Conservation
  • Timer On/Off Control
  • TURBO, for Times of High-Demand
  • Self-Clean Cycle
  • MEMORY, to Recall Favorite Settings
  • IFEEL, to Detect and Adjust to Local Temperature

Ideal For:

• Bedrooms & Master Suites
• Studio Apartments & Condos
• Home Offices & Small Businesses
• Garages, Workshops & Additions

Technical Information & Performance

• AHRI Certificate
• Energy Guide
• Submittal Sheet

• System Kit

  • Power Supply: 110~120V, 60Hz, 1Ph
  • Cooling Rated Capacity: 12,000 BTU/h
  • Cooling Capacity Range: 2,500~12,500 BTU/h
  • Cooling SEER2: 23.0 BTU/W.h
  • Cooling EER2: 13.0 BTU/W.h
  • Heating Rated Capacity: 12,400 BTU/h
  • Heating Capacity Range: 2,500~15,000 BTU/h
  • Heating HSPF2 (Region IV/V): 10.0 / 8.6 BTU/W.h
  • Heating C.O.P.2 (47°F/5°F): 3.81 / 2.1 W/W
  • Refrigerant Type: R454b
  • Recommended Room Size: 350~500 sq ft
  • Minimum Room Size: 40 sq ft
  • Piping Diameter: 3/8" (Gas) / 1/4" (Liquid)
  • AHRI Reference: 217048750

• Indoor Unit

  • Part Number: WT012ALSI24HLG
  • Air Flow (Turbo/Hi/Med/Lo/Mute): 500 / 470 / 411 / 323 / 205 CFM
  • Sound Level (Turbo/Hi/Med/Lo/Mute): 46 / 44 / 36 / 32 / 30 dB(A)
  • Product Dimensions (WDH): 36"-1/2 x 7"-5/8 x 12" Inches
  • Carton Dimensions (WDH): 39" x 10"-1/2 x 15" Inches
  • Net / Gross Weight: 23.1 / 30.9 lbs.

• Outdoor Unit

  • Part Number: YN012ALSI24RPG
  • Breaker Needed: 25A (single-pole)
  • Sound Level: 52 dB(A)
  • Net Dimensions (WDH): 31"-7/8 x 12" x 21"-5/8 Inches
  • Carton Dimensions (WDH): 32"-7/8 x 13" x 22"-5/8 Inches
  • Net / Gross Weight: 58.4 / 65.0 lbs.

Upgrade Your Comfort Today

Don’t settle for outdated, inefficient HVAC systems. Experience next-level comfort, energy savings, and quiet performance with the Pioneer® Quantum Ultra™ 12,000 BTU Mini-Split Heat Pump System.

Dimension Chart