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Mini Split Air Conditioner

Ductless Heating & Cooling

The Ductless System That Cools Only the Rooms You Use

We supply single-zone and multi-zone mini split air conditioner systems. No ductwork. No wasted energy. Room-by-room comfort with high SEER2 efficiency.

βœ“ Licensed installation

βœ“ Manufacturer-backed warranties

βœ“ Single-zone & multi-zone options

What Is a Mini Split Air Conditioner?

A mini split air conditioner—also called a ductless mini split, ductless AC, or split air conditioner—is a two-part heating and cooling system. An outdoor compressor connects to one or more indoor air handlers through a small conduit (usually about 3 inches) that carries refrigerant lines and wiring through your wall.

Unlike central air, there are no ducts. That means no energy loss through leaky ductwork—which can waste 25% to 40% of the air you paid to cool. Each indoor unit delivers conditioned air directly into the room it serves.

Perfect for Homes Without Ducts

Older homes, additions, and unusual layouts where running ductwork is impractical or too expensive.

Room-by-Room Control

Multi-zone mini split systems let you set different temperatures in different rooms—no more cooling empty spaces.

Lower Energy Bills

Ductless systems avoid duct loss entirely. Modern units reach SEER2 ratings of 15 to 25+.

How a Mini Split Air Conditioner Works

A mini split air conditioner does not “create” cold air. It moves heat from inside your home to the outside. Here is the cycle:

  1. Indoor unit (evaporator): A fan pulls warm room air across a cold coil. The refrigerant absorbs heat and humidity, and cooled air blows back into the room.
  2. Refrigerant line: The warmed refrigerant travels through insulated copper tubing to the outdoor unit.
  3. Outdoor unit (compressor & condenser): The compressor pressurizes the refrigerant, and a fan releases the heat into the outdoor air.
  4. Expansion valve: The refrigerant cools down and cycles back inside to repeat the process.

Modern inverter compressors adjust speed continuously instead of switching on and off. That is why a quality mini split air conditioner can maintain a steadier temperature while using less energy.

Types of Mini Split Air Conditioner Systems We Offer

Type Best For
Single-Zone Mini Split Air Conditioner One room, garage, or addition
Multi-Zone Mini Split Air Conditioner (2–5+ zones) Multiple rooms from one outdoor unit
Hyper-Heat Mini Split Cold-climate heating down to low outdoor temps
Floor-Mounted Mini Split Rooms with limited wall or ceiling space
Ceiling Cassette Mini Split Modern homes and commercial spaces

Brands we carry: Daikin, Mitsubishi, Carrier, LG, Fujitsu, Goodman, Trane, Panasonic, Hitachi, Toshiba, Chigo, Cooper Hunter, YMGI, AirCon, Lennox, York, Sanyo, and more.

Benefits of a Mini Split Air Conditioner

Energy Efficiency

Ductless systems avoid the energy loss of ductwork entirely. Inverter technology can improve efficiency by up to 30% compared with fixed-speed systems.

Zone Control

A multi-zone mini split air conditioner lets you set different temperatures in different rooms. You cool the bedroom, not the hallway.

Quiet Operation

Indoor units run as quietly as 20 dB—roughly the sound of a whisper. Outdoor units typically operate between 42 and 56 dB.

Flexible Installation

No ductwork means no tearing open walls or ceilings. A single small wall penetration handles the conduit.

Improved Air Quality

Many mini split air conditioner models include multi-stage filtration that captures dust, allergens, and particles.

Long Lifespan

With proper maintenance, a quality split air conditioner can last 15 to 20 years.

Potential Drawbacks (Honest Expectations)

  • Higher upfront cost than window units. A single-zone mini split air conditioner typically runs $1,500 to $5,000 installed, depending on efficiency and complexity.
  • Indoor units are visible. Wall-mounted units take up wall space. Floor-mounted and ceiling cassette options offer alternatives.
  • Annual maintenance is required. Filters need monthly cleaning, and professional service is recommended yearly.
  • Some homes need an electrical upgrade. A dedicated circuit may be necessary.
  • Refrigerant handling requires certification. Installation and repair must be done by a licensed technician.

Sizing Your Mini Split Air Conditioner: Don’t Guess

Correct sizing is the difference between comfort and wasted money.

Quick Estimate

20 to 25 BTUs per square foot for standard rooms.

A 400 sq. ft. room: roughly 8,000 to 10,000 BTUs.

Adjust Upward by About 10% For:

  • Direct afternoon sun
  • High ceilings
  • Poor insulation
  • Multiple occupants

For Accurate Sizing

Ask for a Manual J load calculation. A qualified HVAC technician will account for your climate, window area, insulation, and home layout.

An oversized mini split air conditioner cools too fast without removing humidity. An undersized unit runs constantly and wears out faster.

Request a Sizing Assessment

2026 Mini Split Air Conditioner Cost Guide

System Type Typical Installed Cost
Window unit $150 – $800
Portable unit $300 – $1,000
Single-zone mini split air conditioner $1,500 – $5,000
Multi-zone mini split (2–5 zones) $5,000 – $15,000+
Ducted split system (whole home) $6,000 – $20,000+

Cost drivers: number of zones, SEER2 rating, installation complexity, whether electrical work is needed, and local labor rates.

Get a Custom Mini Split Quote

Installation: What to Expect

Proper installation is not optional. A poorly installed mini split air conditioner can lose efficiency, leak refrigerant, or fail prematurely.

  1. In-home assessment — room measurements, load calculation, and placement recommendations.
  2. System selection — matching capacity, zones, and efficiency to your budget.
  3. Professional installation — licensed technicians handle refrigerant lines, electrical connections, and mounting.
  4. Commissioning and walkthrough — we test the system, confirm airflow and temperature, and show you how to operate it.

Most single-zone installations can be completed in one day. Multi-zone projects may take longer depending on the number of indoor units and electrical requirements.

Maintenance Essentials for Your Mini Split Air Conditioner

  • Clean or replace filters monthly. Clogged filters restrict airflow and can freeze the indoor coil.
  • Keep the outdoor unit clear. Maintain at least 18 inches of clearance. Remove leaves and vegetation.
  • Clear the condensate drain line. A clogged drain can cause water damage.
  • Schedule professional service annually. A technician should clean the indoor coil, check refrigerant levels, inspect electrical connections, and verify overall performance.

Key Features to Look For in a Mini Split Air Conditioner

Inverter Technology

Variable-speed compressor for steadier temperatures and better efficiency.

High SEER2 Rating

Higher numbers mean lower operating costs.

Quiet Operation

Indoor units around 20 dB; outdoor units under 56 dB.

Smart Controls

Wi-Fi, smartphone apps, scheduling, and voice assistant compatibility.

Advanced Filtration

Multi-stage or HEPA-style filters for better indoor air.

Zone-Specific Controls

Individual thermostats or remotes for each indoor unit in multi-zone systems.

Mini Split Air Conditioner FAQ

Is a mini split air conditioner more efficient than central air?

Yes, in most cases. Ductless systems eliminate duct loss, which can account for 25% to 40% of energy consumption in ducted systems. Inverter-driven mini splits also modulate output rather than cycling on and off.

Can a mini split air conditioner heat my home in winter?

Yes. Mini splits are heat pumps—they provide both cooling and heating. Hyper-heat models are designed for colder climates and maintain capacity at lower outdoor temperatures.

Do I need one indoor unit per room?

Not necessarily. A single indoor unit can serve an open-concept space. For multiple closed rooms, a multi-zone system with separate indoor units gives you independent control.

How long does installation take?

A single-zone system is typically a one-day installation. Multi-zone systems may take two or more days depending on electrical work and the number of indoor units.

What maintenance does a mini split air conditioner need?

Monthly filter cleaning, annual professional tune-up, and periodic drain line clearing. Keeping the outdoor unit clear of debris is also important.

How long does a mini split air conditioner last?

With proper installation and maintenance, 15 to 20 years is realistic for a quality system.

Ready to Choose the Right Mini Split Air Conditioner?

Tell us about your space and we will recommend the right capacity, zones, and efficiency level—without overselling.

We carry single-zone and multi-zone mini split air conditioner systems from the brands homeowners and contractors trust. Whether you are cooling a garage, adding comfort to a finished basement, or replacing an aging central system, we will help you compare options and get a clear installed price.

Serving homeowners and light commercial properties. Licensed installation. Manufacturer-backed warranties.


Mini Split Warehouse offers a wide selection of ductless air conditioners and split heat pumps, providing free shipping nationwide.

(877) 770-3548

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