18,000 BTU Ductless Mini Split AC & Heat Pump | 115V — No 230V Circuit Needed | Filterbuy
18,000 BTU Mini Split That Runs on a Standard 115V Outlet, No 230V Circuit Required
This 1.5-ton heat pump cools and heats rooms up to 400 sq ft on the standard 115V household power already in your walls. It skips the 230V dedicated circuit that other 18,000 BTU units require, and the $500 to $1,500 in electrician work that comes with it.
A practical fit when 230V isn't available where you need it:
- Older homes without 230V wiring in living spaces
- Rental units and ADUs where major electrical changes aren't practical
- Large rooms, studios, and garages up to 400 sq ft on existing 115V power
Not sure which size fits your space? Answer a few quick questions and we'll match you to the right mini split.
Technical Specifications
BTU Capacity: 18,000 BTU (1.5 Ton)
SEER Rating: 17 SEER2
Voltage: 115V (compatible with standard 110/120V household outlets)
Circuit Breaker: dedicated 115V circuit
Compressor Type: Variable Speed DC Inverter
Room Coverage: up to 850 sq ft
Zones: Single Zone
Refrigerant: R32 (+ Eco Mode)
Indoor Unit Type: Wall Mounted
Smart Features: Mobile App Control, WiFi Enabled, Self-Cleaning Mode, Sleep Mode
Warranty: 7-Year Compressor / 3-Year Parts (professional installation required)
Installation: Licensed HVAC Contractor Required
Shipping: Free 2-Day Shipping Anywhere in the US
Electrical Note
This unit needs its own 230V, dedicated 208/230V circuit. It cannot share a circuit with other appliances. A dedicated 115V outlet uses standard household wiring, and your HVAC contractor or electrician can set one up quickly and affordably. Far simpler than pulling a new 230V line.
About This Mini Split
We built the Filterbuy 18,000 BTU mini split because homeowners kept running into the same wall: the unit they needed required a 230V dedicated circuit, which they didn't have. Before installation could start, they were looking at $500–$1,500 in electrician fees, permits, and panel work. This unit runs on standard 115V household power — the same circuits already in your walls — and skips that cost entirely.
At 1.5 tons of cooling and heating capacity, this unit handles the rooms a 12,000 BTU model can't. Large living rooms, open studios, master suites, and oversized garages up to 850 sq ft. The DC inverter compressor adjusts its speed to match what your room actually needs: full power when it's hot, a quiet hum when it's maintaining temperature. That variable speed operation keeps electricity bills lower, and compressor wear down compared to fixed-speed systems. Built-in app control puts temperature, schedules, and heating or cooling mode selection in your pocket.
This is the right unit for older homes without 230V wiring in living spaces, rental properties where major electrical modifications aren't practical, and additions where only standard outlets were roughed in. It's also the right call for any homeowner who wants to keep the total project cost honest — because on most jobs, the 230V electrical work alone costs more than the mini split itself.
Every unit ships free in 2 days with everything your contractor needs already in the box. Professional-grade quality, backed by the air quality experts at Filterbuy.
Built for Larger Spaces, Powered by Your Standard Outlet
1.5-Ton Capacity for Bigger Rooms
At 18,000 BTU, this unit covers rooms that 12,000 BTU models simply can't reach: open-plan living rooms, large master bedrooms, studio apartments, and oversized garages up to 850 sq ft. One wall-mounted unit handles it all.
Variable Speed Inverter
The DC inverter compressor adjusts its speed continuously to match your room's demand. It ramps up for rapid cooling and dials back to a whisper when maintaining temperature. This is especially important at 115V, where efficient power management keeps your electricity bill in check. Lower energy use, more consistent comfort, and less compressor wear than fixed-speed alternatives.
Smart App Control
Control your comfort from anywhere. Adjust temperature, set schedules, switch between heating and cooling modes, and monitor your system from the dedicated mobile app. Especially useful for spaces you don't use every day — garages, guest rooms — so they're comfortable the moment you walk in.
Heat Pump — Cooling & Heating Year-Round
This isn't just an air conditioner. The built-in heat pump reverses the refrigerant cycle to provide heating in winter and cooling in summer from a single system. No separate space heaters, no supplemental equipment, no seasonal swaps. One unit, every month of the year.
Self-Cleaning Technology
An automated cleaning cycle dries the evaporator coil after each use, preventing mold and bacteria buildup. At 18,000 BTU, this system moves more air than smaller models, which means the coil and filter collect dust and allergens faster. The self-cleaning function protects air quality and extends the system's life. It's a premium maintenance feature at a mid-market price point.
Installation Instructions and Wiring Diagram
Drain Hose and Fittings
Professional HVAC installation required. Self-installation voids the manufacturer's warranty. With free 2-day shipping, your contractor won't wait for parts.
Electrical Requirement
This unit needs a 230V, dedicated 208/230V circuit. While no 230V line is required, the unit cannot share a circuit with other appliances. Your HVAC contractor or electrician can set up a dedicated 115V outlet using standard household wiring — a significantly simpler and more affordable job than installing a new 230V circuit.
Backed by Innovation and Air Quality Expertise
We built this product because we know not every home has a 230V circuit, and nobody should have to spend $1,000+ on electrical work just to cool their living room.
As the nation's leading air filter provider, we also know that bigger systems need more attention. An 18,000 BTU unit moves significantly more air than a 12K model, which means the filter collects dust, dander, and allergens faster. Regular filter cleaning isn't optional — it's what keeps your system efficient, your air clean, and your energy bills where they should be.
Every Filterbuy mini split comes with:
Expert Maintenance Guidance tailored to higher-capacity systems that work harder and need more attention
Filter Cleaning Reminders so the maintenance that protects your investment doesn't slip through the cracks
Access to our IAQ Resource Library with guides on air quality, allergens, and system care
Free 2-Day Shipping on every order, anywhere in the US
Real Customer Support from people who understand air quality and HVAC
Other retailers ship you a box. We back it with a decade of air quality expertise that no one else has either.
Frequently Asked Questions
Shop All Mini Split Systems
18,000 BTU Mini Split — 230V (the available model) up to 850 sq ft
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24,000 BTU Mini Split for large rooms up to 1,100 sq ft (230V)
