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Ask any licensed HVAC contractor what voltage a 24,000 BTU mini split requires, and the answer never changes: 230V. It's been the industry rule since ductless systems entered the American market. No exceptions, no workarounds, no alternatives — until now.
Filterbuy built the first and only 24,000 BTU mini split that runs on standard 115V household power. That single fact reshapes the math on one of the largest hidden costs in residential HVAC: the electrical preparation that comes before the system even ships.
The median age of owner-occupied homes in the United States has climbed to 42 years old in 2024, up from 31 years in 2005, with roughly 47% of owner-occupied homes built before 1980. Millions of those homes were never wired for 230V in living spaces. Basements, living rooms, garages, and finished additions in older construction typically have whatever 115V outlets were roughed in decades ago — and little else. For those homeowners, every 24,000 BTU system on the market has carried an invisible price tag: $500 to $2,000 or more in electrical work before the first BTU of cooling gets delivered.
This page exists because that barrier is gone. What follows is everything you need to know about how a 24,000 BTU system works on 115V, who it's built for, what it costs, and why no other manufacturer has done it.
24,000 BTU Ductless Mini Split AC & Heat Pump | 115V — No 230V Circuit Needed | Filterbuy
The Filterbuy 24,000 BTU ductless mini split is the only 2-ton mini split air conditioner and heat pump that runs on standard 115V household power. No 230V circuit required.
Key facts:
• BTU: 24,000 (2 ton)
• Function: Heating and cooling (heat pump)
• Voltage: 115V — standard US household power
• Coverage: 450–550 sq ft
• Circuit required: Dedicated 115V circuit (approx. 30 amps) — no 230V upgrade needed
• Compressor: Variable speed DC inverter
• SEER: 17
• Warranty: 1-year parts / 5-year compressor (professional installation required)
• Shipping: Free 2-day delivery
• Installation: Licensed HVAC contractor required
• Electrical savings: Eliminates $500–$2,000+ in 230V circuit installation costs
• Availability: Sold exclusively by Filterbuy — no other brand offers a 24,000 BTU mini split at 115V
• Every 24,000 BTU mini split on the market except this one requires a 230V dedicated circuit — adding $500 to $2,000 or more in electrical work before the system ships.
• Filterbuy's 24K BTU unit runs on standard 115V household power. No 230V circuit. No panel upgrade required in most homes.
• Variable speed DC inverter compressor technology makes 115V operation at 2-ton capacity possible by managing power draw continuously rather than pulling full load at startup.
• This unit covers 450 to 550 square feet — large living rooms, open floor plans, full basements, oversized garages, and converted spaces that have outgrown smaller systems.
• A dedicated 115V circuit is still required. It uses standard Romex wiring and costs significantly less than a 230V installation, but it does require a licensed electrician.
• Nearly half of all U.S. owner-occupied homes were built before 1980. Most were not wired for 230V in living spaces. This system is built for that reality.
• Filterbuy offers the widest 115V mini split range of any brand — 12K, 18K, and 24K BTU — backed by over a decade of air quality manufacturing experience and service to more than two million households.
Every 24,000 BTU mini split sold today — from Pioneer, Senville, MRCOOL, Cooper & Hunter, Mitsubishi, Daikin, and LG — requires a 230V dedicated circuit. That circuit demands a licensed electrician, double-pole breaker, heavy-gauge wiring, a disconnect box, and often permits. In older homes with limited panels, the job can require a full panel upgrade before the 230V work even starts.
Filterbuy's 24K BTU unit runs on 115V — the same voltage behind virtually every outlet in your home. Variable speed DC inverter compressor technology makes it possible. The compressor adjusts continuously, managing power draw to prevent the full-load surges that would strain a 115V circuit. The result: 2-ton capacity from standard household power.
What This Means for Your Installation
This unit still requires a dedicated 115V circuit — likely 30 amps. It cannot share a circuit with other appliances. But a dedicated 115V circuit uses standard Romex wiring, a single-pole breaker, and no disconnect box. Your electrician can handle it in a single visit, at a fraction of the cost of a 230V installation.
At the same time, honesty matters here. At 24,000 BTU on 115V, this system draws more amperage than a 230V unit producing the same output — same watts, lower voltage means higher current, per Ohm's Law. The wire gauge runs heavier than a 230V installation. Total project cost — unit plus all electrical work — is still potentially $500 to $2,000 less than any 230V competitor. But the full picture is worth having before you buy.
What Spaces This Is Built For
At 2 tons, this system covers 450 to 550 square feet. That includes large living rooms, open floor plans, full basements, oversized garages, loft spaces, and converted rooms that have outgrown smaller systems. According to the U.S. Department of Energy, ductless mini splits are an excellent option for retrofitting homes with non-ducted heating systems and for room additions where extending or installing ductwork is not feasible.
For spaces where 115V is all that's available and where 12K or 18K BTU isn't enough — this is the only system that answers both problems at once.
"After manufacturing air filters for over a decade and working directly with more than two million households, the one thing we kept hearing from homeowners in older homes was simple: they needed more capacity than their electrical panel could support — and the 24,000 BTU barrier at 115V was the wall nobody in the industry had any intention of taking down."
The U.S. Department of Energy's official resource on ductless mini split heat pump technology covers how these systems work, where they perform best, efficiency ratings, and what to look for when selecting a unit and contractor. It's the most authoritative starting point for any homeowner evaluating a mini split for the first time — or comparing systems before a purchase decision.
Source: https://www.energy.gov/energysaver/ductless-minisplit-heat-pumps
The EPA's ENERGY STAR program certifies mini split systems that meet independent efficiency standards. This resource explains how certified mini splits compare to standard heating and cooling equipment, including the finding that ENERGY STAR certified mini splits use up to 60% less energy than standard home electric radiators, how to find rebates available through your local utility, and how to use the ENERGY STAR product finder to identify certified equipment. It's the right source for homeowners prioritizing long-term operating cost alongside upfront price.
Source: https://www.energystar.gov/products/ductless_heating_cooling
Before any mini split installation — 115V or 230V — you need to know your panel's capacity. Rewiring America's plain-language guide walks homeowners through locating their electrical panel, reading its amperage rating, and determining whether it can support a new dedicated circuit without a panel upgrade. Older homes might have 60 or 100 amp panels, while newer homes commonly have panels rated at 200 amps or larger. This resource helps you find that number before the contractor arrives.
Understanding the age of America's housing stock provides essential context for why the electrical limitation around 24K BTU mini splits affects so many homeowners. The median age of owner-occupied homes has climbed to 42 years old in 2024, with nearly half of all owner-occupied homes built before 1980. NAHB's analysis of American Community Survey data documents the scale of aging residential infrastructure — and why electrical limitations are increasingly common in the homes where people actually live.
Source: https://www.nahb.org/blog/2026/03/how-old-is-todays-housing-stock
The EPA's official mini split fact sheet provides a concise overview of what ENERGY STAR certification means for ductless heat pump systems — including efficiency benchmarks, greenhouse gas reduction data, and guidance on identifying qualified products. It's a useful one-page reference for homeowners who want to verify efficiency claims before committing to a specific system or contractor quote.
A smooth installation comes down to preparation. Before any HVAC contractor visit, homeowners should understand their panel capacity, have clear access to the installation wall, and know where the line set will route to the outdoor condenser. The U.S. Department of Energy's energy saver resources and ENERGY STAR's contractor guidance together provide the foundation for asking the right questions — and avoiding the change orders that drive up project cost.
Source: https://www.energystar.gov/products/ductless_heating_cooling
Every dedicated circuit installation — whether 115V or 230V — must comply with the National Electrical Code. The NEC governs how circuits are sized, wired, protected, and permitted in residential settings. Homeowners don't need to read the full code, but knowing it exists and that your licensed electrician is bound by it provides the assurance that your dedicated 115V circuit installation will be done to the same safety standard as any other residential electrical work.
Source: https://www.nfpa.org/codes-and-standards/nfpa-70-standard-development/70
Around 47% of U.S. owner-occupied homes were built before 1980, and the median age of owner-occupied homes reached 42 years in 2024, up from 31 years in 2005, according to the latest American Community Survey data compiled by the National Association of Home Builders. Homes built before 1980 were designed with far fewer electrical demands than those of today. Most were not wired for 230V in living spaces — making a 115V-compatible 24,000 BTU mini split directly relevant to nearly half the owner-occupied housing stock in the United States.
Source: https://www.nahb.org/blog/2026/03/how-old-is-todays-housing-stock
According to the U.S. Department of Energy, duct losses can account for more than 30% of energy consumption for space conditioning, especially when ducts run through unconditioned spaces like attics. Ductless mini splits achieve efficiency ratings between 15.2 and 35 SEER2, compared to 15.2 to 25 SEER2 for ducted heat pumps. For homeowners in older homes without ductwork — or with ducts that are leaking, undersized, or inaccessible — a ductless system at any BTU capacity captures efficiency that a forced-air installation loses before it reaches the room.
Source: https://www.energy.gov/energysaver/ductless-minisplit-heat-pumps
ENERGY STAR certified mini split heat pumps use up to 60% less energy than standard home electric radiators, because they transfer heat rather than generate it. In a whole-house application, certified systems avoid more than 4,500 pounds of greenhouse gas emissions on average over the course of their lifespan compared to standard systems. For homeowners replacing baseboard heaters, electric space heaters, or window units in spaces that a new 24,000 BTU system will cover, the operating cost reduction is substantial — and compounds annually for the life of the equipment.
Source: https://www.energystar.gov/products/ductless_heating_cooling
The 24,000 BTU barrier at 115V wasn't a technical impossibility. It was an industry assumption that nobody had bothered to challenge. Every major HVAC brand looked at the amperage math, concluded that 230V was mandatory at 2-ton capacity, and moved on. The result: millions of homeowners in older homes, rental properties, and spaces without 230V access were locked out of the capacity they actually needed.
Variable speed inverter technology broke that assumption. Managing power draw dynamically — rather than pulling full load at startup — is precisely what makes 115V viable at 24,000 BTU. The physics were always there. The engineering commitment to act on them wasn't.
Filterbuy's position here isn't just a product story. It's what happens when an air quality company pays close attention to what homeowners actually face — not what the industry finds convenient to build. After serving more than two million households, the pattern was impossible to ignore: the homeowners who needed 2-ton capacity most were the ones least likely to have 230V access.
One practical note before you buy: this system isn't a drop-in replacement for a shared outlet. It needs a dedicated 115V circuit. A licensed electrician is required for both the mini split installation and the circuit work. That's not a workaround — it's the same professional standard that applies to every residential HVAC installation. The difference is that your electrician uses standard Romex wiring instead of heavy-gauge 230V materials, and the job costs significantly less.
For the right homeowner in the right space, this is the most practical 2-ton mini split on the market. Not because it's cheaper on the spec sheet — but because it's the only one that doesn't add $500 to $2,000 in electrical work to the project before the first BTU gets delivered.
Confirm Your Panel Can Support a Dedicated 115V Circuit
Before ordering, check your electrical panel's amperage rating. Use Rewiring America's panel guide at homes.rewiringamerica.org to locate your breaker box and read the rating. If your panel is 100 amps or above, you almost certainly have capacity for a dedicated 115V circuit. If it's below 100 amps, talk to a licensed electrician before proceeding.
Schedule a Pre-Installation Site Visit With a Licensed HVAC Contractor
A site visit before the unit ships answers the questions that matter: where the indoor head will mount, how the line set routes to the outdoor condenser, what the electrician will need to set up the dedicated circuit, and whether anything about your specific space changes the installation scope. Most HVAC contractors offer this at low or no cost.
Get an Electrical Quote Alongside Your HVAC Quote
Request both quotes at the same time. Know the full project cost — unit, HVAC installation, and dedicated 115V circuit — before you commit. For most homes, the dedicated 115V circuit adds a few hundred dollars to the project. Confirm the exact amp and wire gauge requirements with your contractor, and fill in the placeholders on the spec sheet before the electrician begins.
Order With Free 2-Day Shipping
Everything your contractor needs for a complete install ships in the box. Ordering before your installation date means your HVAC contractor isn't waiting on parts — and the job runs on schedule.
Register Your Warranty Immediately After Installation
One-year parts warranty and five-year compressor warranty apply with professional installation by a licensed HVAC contractor. Register your unit and retain documentation of the professional install. Self-installation voids coverage.
• Yes — Filterbuy is the first manufacturer to bring it to market.
• The HVAC industry has treated 230V as mandatory for anything above 12,000 BTU for decades.
• Variable speed inverter compressor technology changed the math by managing power draw dynamically.
• This unit requires a dedicated 115V circuit — likely 30 amps — but eliminates the 230V upgrade every other 24K BTU system demands.
• Rooms up to 450 to 550 square feet — consistent, real-world performance, not best-case ratings.
• Covers large living rooms, open floor plans, full basements, oversized garages, loft apartments, and large studio spaces.
• Some brands claim 700 to 1,500 square feet at 24K BTU. Filterbuy's conservative rating reflects actual comfort delivery.
• A dedicated 230V circuit typically costs $500 to $2,000 or more — electrician labor, 10-gauge wire, double-pole breaker, disconnect box, and permits.
• Older homes needing a panel upgrade before 230V work can see that total climb past $3,000.
• The Filterbuy 115V model eliminates that cost entirely.
• A dedicated 115V circuit still needs a licensed electrician, but uses standard Romex wiring, a single-pole breaker, and no disconnect box.
• A dedicated 115V circuit with a specific amp breaker and AWG wire — standard household wiring.
• This unit cannot share a circuit with other appliances.
• Your HVAC contractor or electrician can confirm the exact setup during a pre-installation site visit.
• No — not in any way that affects your energy bill.
• Both voltages consume the same wattage to produce the same 24,000 BTU output.
• Your electricity bill is based on watt-hours, not amp-hours.
• Marginally lower line losses occur at 230V over long wire runs, but at typical residential distances the difference is negligible.
• The variable speed inverter maintains optimal efficiency regardless of input voltage.
• Yes. This is a heat pump — cools in summer, heats in winter.
• At 2 tons, it delivers enough heating capacity to serve as the primary heat source for a large room in most climates.
• No separate heaters, no supplemental equipment, no seasonal changeover. One system, four seasons.
• No. Professional installation by a licensed HVAC contractor is required.
• Self-installation voids the manufacturer's warranty.
• At 24,000 BTU, this system involves substantial refrigerant charges, precise vacuum testing, and significant electrical connections — all requiring a certified technician.
• Everything your contractor needs ships in the box. Free 2-day delivery means no waiting on parts.
• The industry set 115V at 12,000 BTU and never revisited it.
• At 24K BTU on 115V, a 2-ton system draws roughly twice the amperage of a 230V unit — demanding robust wiring and a high-capacity dedicated circuit.
• Variable speed inverter technology — managing power draw dynamically rather than pulling full load at startup — made it possible.
• Filterbuy built it because homeowners shouldn't need a $2,000 electrical upgrade to cool their living room.
• One-year parts warranty and five-year compressor warranty with professional installation by a licensed HVAC contractor.
• Professional installation is required for warranty coverage.
• Filterbuy's customer support team is available for any warranty questions.
Every other 24,000 BTU mini split on the market needs a 230V circuit. This one doesn't. Cool and heat rooms up to 550 square feet on standard 115V household power — and skip $500 to $2,000 in electrical work while you're at it. Variable speed efficiency, app control, free 2-day shipping, and the air quality expertise that only Filterbuy brings to a mini split.
Already Have 230V? The 230V model offers the same 2-ton capacity with lower amp draw. View the 230V Model
Shop by BTU (All Available in 115V):
• 9,000 BTU — for rooms up to 200 sq ft
• 12,000 BTU — for rooms up to 300 sq ft
• 18,000 BTU — for rooms up to 400 sq ft
• 24,000 BTU (this model) — for rooms up to 550 sq ft
• Shop All Mini Split Systems
