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That bonus room above the garage has been too hot since summer started. The home office gets whatever temperature the rest of the house decides on. The garage workshop? Not even worth trying. The Filterbuy 12,000 BTU ductless mini split was built for exactly these situations: real heating and cooling for rooms up to 300 sq ft, no ductwork required.
What makes the 115V model practical right away is the power connection. It runs on a standard 110/120V household outlet, so your HVAC contractor can start the job without waiting on an electrician. That's a real cost difference before installation even begins, especially in garages, additions, and older homes.
Under the hood, a variable-speed DC inverter compressor reads your room and adjusts output continuously. It ramps up fast for rapid cooling, then backs off to hold your temperature steady, drawing less power and running quieter while it does it. Add built-in WiFi, and you can adjust your comfort from the couch or from across town.
Every unit ships free in 2 days, with everything your contractor needs already in the box. And because this is Filterbuy, you're backed by the air quality team that has helped millions of homeowners take control of what they breathe indoors.
The DC inverter compressor doesn't cycle on and off the way older systems do. It reads your room and adjusts speed in real time, running hard for rapid cool-down and dialing back once you're there. The result is more consistent comfort throughout the day and lower electricity bills compared to fixed-speed systems.
This mini split runs on a standard 110/120V outlet, so there's no dedicated 230V circuit to run and no electrician visit required before your HVAC installer can start. For garages, additions, and older homes where rewiring isn't in the budget, that's often what makes the 115V model the right call.
The built-in WiFi connects to a dedicated mobile app. Adjust temperature, set schedules, switch between heating and cooling modes, and check system status from your phone. Cool down your home office before you sit down. Warm up the garage before you head out to the workshop.
The indoor unit runs at a low dBA on a low speed. Window air conditioners typically run at 50–70 dBA. This unit runs quieter because the compressor lives outside, not in your room. Sleep mode reduces output even further for undisturbed rest.
This is a heat pump, which means it handles both summer cooling and winter heating from a single wall-mounted unit. It reverses refrigerant flow to pull warmth from outdoor air and deliver it inside. No separate space heaters. One system, every season.
After each cooling cycle, an automated self-cleaning function dries the evaporator coil to stop mold and bacteria from taking hold. It protects your air quality and extends system life. On most units, this is a premium feature. On every Filterbuy mini split, it comes standard.
Whisper-quiet operation and a dedicated sleep mode make this mini split a natural fit for bedrooms. Set your temperature, turn off the lights, and the system holds it there through the night without the noise of a window unit waking you up.
Zone control means you set the temperature for your workspace without affecting the rest of the house. No thermostat arguments. No waiting for the central system to catch up. Just focused, comfortable air where you actually need it.
Garages don't have ductwork, and window ACs can't handle the heat load of an enclosed workspace. A ductless unit solves both problems, and the 115V connection means you power it from a standard outlet with no rewiring.
Adding a room? Building an ADU or casita? The 115V advantage means you add heating and cooling without running new 230V electrical. Everything your contractor needs comes in the box. Your new space goes from construction zone to comfortable faster.
A sunroom that's comfortable year-round is a different room entirely. The heat pump handles both extremes: cooling in direct summer sun and heating through winter. No matter what's happening outside, your sunroom stays livable.
Everything your HVAC contractor needs for a complete professional installation:
• Indoor wall-mount air handler unit
• Outdoor condenser/compressor unit
• Pre-flared copper line set
• 115V power supply cable
• Wireless remote control
• Mounting bracket and hardware
• Installation instructions and wiring diagram
• Drain hose and fittings
Professional HVAC installation is required. Self-installation voids the manufacturer's warranty. The good news: everything your contractor needs is already in the box, so installation stays straightforward with no extra supply house runs.
When you buy a mini split from Filterbuy, you're getting more than a cooling system. You're getting the support of a team that has spent over a decade obsessing over indoor air.
We're the nation's leading air filter provider. That means we know something most mini split retailers don't: proper filtration and regular maintenance are what separate a system that runs 8 years from one that runs 20. Mini splits rely on built-in mesh filters that need routine cleaning to maintain airflow, efficiency, and air quality. Skip that maintenance, and you're looking at higher energy bills, reduced performance, and air that's quietly working against you.
We've helped millions of homeowners take control of what they breathe indoors. We bring that same expertise to every mini split we sell. When you choose Filterbuy, you get:
• Expert maintenance guidance to keep your system running at peak performance
• Filter cleaning reminders so the maintenance that protects your investment never slips
• 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 actually understand air quality
Other retailers sell you a box. We help you breathe better for years to come.
The Filterbuy 12,000 BTU mini split cools and heats rooms up to 250–300 square feet. That covers most standard bedrooms, home offices, guest rooms, studios, and single-car garages. High ceilings, large windows, poor insulation, or heavy sun exposure can shrink effective coverage. In those cases, stepping up to an 18,000 BTU unit gives you a better result.
Yes. This unit runs on standard 110/120V power, the same as most appliances in your home. No dedicated 230V circuit needed. Just make sure the outlet is on a dedicated circuit and not shared with other high-draw appliances for best performance.
Yes. This is a heat pump. In summer, it cools. In winter, it reverses refrigerant flow to pull heat from outdoor air and deliver it inside, even in moderately cold temperatures. One unit, every season. No separate space heaters needed.
At the national average electricity rate of $0.15 per kWh, a 12,000 BTU unit with a 17 SEER rating costs roughly $36 per month running 8 hours a day. In practice, your costs will likely be lower. The variable speed inverter only draws full power during initial cool-down, not while holding temperature. Compared to older fixed-speed window ACs, most homeowners see a real difference in their monthly bill.
No. Professional HVAC installation is required, and self-installation voids the manufacturer's warranty. Mini split installation involves refrigerant handling, electrical connections, and mounting both indoor and outdoor units. That work requires a licensed HVAC technician. The good news: everything your contractor needs is already in the box. With free 2-day shipping from Filterbuy, your installer won't be waiting on parts.
Traditional air conditioners use fixed-speed compressors that cycle fully on and fully off. A variable speed inverter compressor adjusts speed continuously. It runs fast for rapid cooling and slows down to hold the temperature steady. The result is more consistent comfort, lower energy use, quieter operation, and less wear on the compressor over time. It's the same technology used in premium systems from brands like Mitsubishi and Daikin.
The indoor unit runs at low dBA on a low speed. For context, a whisper registers around 30 dBA. A typical window air conditioner runs at 50–70 dBA. Mini splits run quieter because the compressor sits outside, not in your room. At low speed, this unit is barely noticeable. That's why mini splits are the preferred choice for bedrooms, nurseries, and home offices.
This unit includes a 1-year parts warranty and a 5-year compressor warranty when a licensed HVAC contractor handles installation. Professional installation is a warranty requirement. Self-installation voids coverage. Our customer support team is here to help with any warranty questions.
Both deliver the same heating and cooling capacity. The difference is in the electrical requirements. A 115V mini split runs on a standard household outlet, making it easier and more affordable to install. A 230V mini split needs a dedicated 230-volt circuit, similar to what powers a clothes dryer or electric range. If you have a standard outlet near your installation spot, the 115V model saves you the cost of running new electrical. Filterbuy offers this unit in both configurations.
Yes. Like all mini splits, this unit has a built-in washable mesh filter that captures dust, pet dander, and airborne particles before they circulate into your room. For best performance and air quality, clean the filter every 2–4 weeks. Remove it from the indoor unit, rinse it with water, let it dry completely, and reinstall.
This is where Filterbuy's air quality expertise actually matters. We've spent over a decade helping millions of homeowners understand and maintain their air filtration. When you buy a mini split from us, you're not just getting a system. You're getting maintenance guides, filter care reminders, and the knowledge to keep your indoor air clean and your system running efficiently for years to come.
The Filterbuy 12,000 BTU ductless mini split delivers professional-grade heating and cooling for rooms up to 300 sq ft, powered by a standard 115V outlet and backed by air quality experts. Free 2-day shipping and a 5-year compressor warranty. Everything your contractor needs is already in the box.
