Pioneer · Model WYT012ALSI24RL-10S
Quantum Ultra High-Wall 12,000 BTU Ductless Mini Split 115V
A wall-mounted split air conditioner rated at 12,000 BTU for rooms up to 500 sq ft. It heats in winter too.
$1,133
Live price at SylvanePackage: 10 ft line set
Price checked Oct 8, 2026
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Will it cool your room?
This unit's cooling matches your 350 sq ft room.
Mini-splits are rated on SEER2, a seasonal scale, not the ENERGY STAR annual-kWh figure this dollar estimate is built from, so there is no comparable figure to show here. A blank is missing data, not a worse result: a mini-split is often the more efficient choice.
Installation cost
$2,500-6,000 fully installed for a typical room (the equipment is roughly $700-1,800, professional installation roughly $1,500-4,000+ depending on line-set run, electrical and access). The unit price you see here is hardware only; installation is the larger, separate cost.
A typical range for this system type, for comparison only, not a quote for this unit. The actual price depends on the line-set run, electrical work and access.
What each mini-split size costs todayAt a glance
Best for larger open-plan rooms.
Performance
- Cooling capacity
- 12,000 BTU · 3.5 kW
- Heating capacity
- Yes
- Room coverage
- up to 500 sq ft
- Energy Star
- Not published
- SEER2
- 23
- Annual energy (cooling)
- Not published
Noise, size & features
- Model number
- WYT012ALSI24RL-10S
- Indoor noise
- Not published
- Outdoor noise
- Not published
- Indoor unit
- Not published
- Outdoor unit
- Yes
- Refrigerant
- R-454B
- Wi-Fi / app
- Not published
- Outdoor unit needed
- Yes
- Power supply
- 115 V
- Warranty
- 5-Year Parts and Compressor Warranty Limited (with required warranty registration)
SEER2, supply voltage, refrigerant and warranty are from Sylvane's published specifications for this exact configuration, checked Oct 2, 2026.
What is good
- Its SEER2 23 is more efficient than 52 of the 62 other mini-splits we list with a published SEER2.
- Uses R-454B (GWP 466), the low-GWP class new US residential equipment moved to.
Installation & the rules that apply
This is a single split. This is where regulation bites. Under EPA Section 608 the refrigerant circuit may only be opened by a certified technician, and the EPA is explicit that this includes connecting or disconnecting the pre-charged line sets sold with "DIY" mini-split kits. No federal law stops you doing the mounting, bracketing and line routing yourself, but handling the refrigerant without certification voids the warranty and is a violation. Most US jurisdictions also require permits for a new outdoor unit: typically mechanical or building for the wall penetration and mount, plus electrical for the dedicated 240 V circuit and disconnect. An HOA nearly always has to approve exterior equipment in advance, and local noise ordinances can cap how loud the condenser may be at the property line. This varies by city and county, so confirm with your building department before buying hardware.
Certified installer
R-454B
Common questions about the Pioneer Quantum Ultra High-Wall 12,000 BTU Ductless Mini Split 115V
- How energy-efficient is the Pioneer Quantum Ultra High-Wall 12,000 BTU Ductless Mini Split 115V?
- Its efficiency rating is SEER2 23.
- What size room does the Pioneer Quantum Ultra High-Wall 12,000 BTU Ductless Mini Split 115V cool?
- It is rated to cool a room up to 500 sq ft (12,000 BTU · 3.5 kW).
- Do I need a professional to install the Pioneer Quantum Ultra High-Wall 12,000 BTU Ductless Mini Split 115V?
- Yes. As a single split it needs a certified installer. Usually needs permission.
- Does the Pioneer Quantum Ultra High-Wall 12,000 BTU Ductless Mini Split 115V heat as well as cool?
- Yes. It also heats.
How Pioneer compares with other brands
Both lineups at every size both brands sell in stock, with live prices, ratings and the warranty each listing states.
How the Pioneer Quantum line compares
Both lines at every size both sell in stock, with live prices, ratings, recalls and what each maker says about its line.
Is a split even the right type?
Compare splits against the other types on price, noise, efficiency and install.
Buying guides for a single split like this
The questions buyers ask, answered from live prices and real specs. See where a single split like this fits.
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at Sylvane
Package: 10 ft line set
+ pro install, usually $1,500-4,000