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:
Not sure which size fits your space? Answer a few quick questions and we'll match you to the right mini split.
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
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.
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.
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.
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.
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.
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.
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.
Professional HVAC installation required. Self-installation voids the manufacturer's warranty. With free 2-day shipping, your contractor won't wait for parts.
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.
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.
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.
The Filterbuy 18,000 BTU mini split effectively cools and heats rooms up to 850 sq ft. That covers large living rooms, open studios, master bedrooms with high ceilings, single-car garages, and home additions.
Yes — a 230V, dedicated 208/230V circuit with a 20-amp breaker. The unit runs on standard 115V power (no 230V needed), but it draws enough current that it needs its own circuit and can't share with other appliances. A licensed electrician can set up a dedicated 115V outlet quickly and affordably. Standard household wiring, not the high-voltage work that a 230V installation requires.
Yes. This system is a heat pump, providing cooling in summer and heating in winter from a single unit. The compressor reverses the refrigerant cycle to extract heat from outdoor air and bring it inside. One system, every season — which eliminates the need for separate heating equipment, especially useful in spaces like garages and additions where running supplemental heat would add even more cost and complexity.
No. Professional installation by a licensed HVAC contractor is required, and self-installation voids the manufacturer's warranty. Mini split installation involves handling refrigerant, making electrical connections, and properly mounting both the indoor and outdoor units. Everything your contractor needs is included in the box, and with Filterbuy's free 2-day shipping, there's no waiting on parts.
The indoor unit operates as low as 28 dB (Mute Mode). Larger-capacity mini splits run slightly louder than 12K models at full output, but the variable speed inverter compressor spends most of its time at partial load, where noise levels drop significantly. For context, a whisper measures about 30 dBA, and a window air conditioner runs at 50–70 dBA. Even at 18,000 BTU, this unit is dramatically quieter than window alternatives.
Yes. Like all mini splits, this unit has a built-in washable mesh filter that captures dust, pet dander, and airborne particles. At 18,000 BTU, the system moves more air than smaller models, which means the filter collects contaminants faster. Clean it every 2–4 weeks for best performance. Regular maintenance keeps airflow strong, energy efficiency high, and your indoor air quality at its best. This is where Filterbuy's expertise matters most. We've spent over a decade helping millions of homeowners maintain cleaner air. When you buy a mini split from us, you get access to maintenance guides, filter care reminders, and the knowledge to keep your system running efficiently for years.
18,000 BTU Mini Split — 230V (the available model) up to 850 sq ft
12,000 BTU Mini Split for rooms up to 550 sq ft (115V & 230V)
24,000 BTU Mini Split for large rooms up to 1,100 sq ft (230V)
