Mini splits are a popular choice for heating and cooling small spaces, single rooms, or additions. These systems are known for their efficiency, quiet operation, and easy installation. The best mini splits can help lower energy bills while keeping your space comfortable year-round.
There are many models on the market, and each one offers different features like smart controls, strong warranties, and advanced filters. Choosing the right mini split depends on the size of your space, climate, and personal preferences.
This article reviews the top mini split systems, highlighting what makes each one stand out. Whether upgrading an old unit or buying one for the first time, readers will find straightforward advice to help them make an informed decision.
What Are Mini Splits?
Mini splits are a type of heating and cooling system. They do not use large ductwork like traditional central air. Instead, mini splits are ductless.
A mini split has two main parts:
-
An indoor air handler that blows air into the room
-
An outdoor compressor that moves heat in or out
The two units are linked by a small line that passes through the wall. This line carries refrigerant and power.
Mini splits are used to control temperature in single rooms or small spaces. Some homes use them to heat or cool a whole house by installing several indoor units.
Key features of mini splits include:
| Feature |
Description |
| Ductless |
No need for big air ducts |
| Quiet operation |
Often makes less noise than window units |
| Zoned comfort |
Allows control of different rooms |
| Energy efficient |
Can use less energy in many cases |
Mini splits work with a remote control or wall unit. They are popular in homes, offices, and small apartments.
Types of Mini Splits
Mini split systems can serve one or more rooms in a home. The number of zones, or indoor units, decides how flexible the system is for heating or cooling different spaces.
Single zone mini splits have one outdoor unit and one indoor unit. These systems are designed for individual rooms or open spaces. They are a good choice for bedrooms, small offices, or additions where only one space needs climate control.
Advantages include simple installation and lower upfront cost. Maintenance tends to be easier because there are fewer parts. Single zone units often come with remote controls, various fan speeds, and programmable timers.
However, they are limited to one area. If users want to heat or cool more than one room, a single zone system will not be enough. Most brands offer energy-efficient options, and some units qualify for rebates or incentives.
Two zone mini splits consist of one outdoor unit connected to two indoor units. This allows heating or cooling of two separate rooms, such as a living room and a bedroom, at the same time.
Control can be set separately for each indoor unit, so people can customize the temperature in each zone. This is helpful for homes with areas that heat or cool at different rates. Installation is more complex than single zone systems, but there is only one outdoor unit, which saves space.
Two zone systems are efficient for small homes, apartments, or offices. They usually support up to about 18,000–24,000 BTU in total, but the exact range depends on the brand and model. Most two zone units support both heating and cooling.
Three zone mini splits connect up to three indoor units to a single outdoor pump. This setup handles three separate rooms or spaces, which is useful for medium-sized houses, condos, or multi-room offices.
Each unit can be controlled independently, so temperatures can be set to suit each room's needs. This zoned comfort helps with energy savings since unused rooms can be set to a more energy-efficient temperature.
Models often support a total BTU range of about 24,000–36,000 or higher, depending on the system. Some systems have extra features, such as wall-mounted, ceiling cassette, or floor-mounted indoor units for better flexibility.
Multi-zone mini splits can connect four or more indoor units to one outdoor unit. Some models support up to five or even eight zones. This type is suited for large homes, multi-story spaces, or buildings with many areas that need separate climate control.
Each zone can be set to a different temperature, which is helpful for families with different comfort needs. These systems are good for replacing old central HVAC in homes that lack ductwork. Table 1 shows some possible zone combinations:
| Outdoor Unit |
Indoor Units Supported |
| 4 Zone |
4 (e.g., 4 bedrooms) |
| 5 Zone |
5 (e.g., living, kitchen, 3 beds) |
| 8 Zone |
8 (very large homes) |
Multi-zone systems cost more and require professional installation. Still, they provide the most flexibility for individual room control and can lower energy use when only some areas are in use.
Top-Rated Single Zone Mini Splits
Mini split systems provide targeted cooling and heating for individual rooms. These units are known for their energy efficiency and easy installation compared to central HVAC systems.
The MRCOOL Advantage 4th Gen 36K BTU model is designed for large rooms or open spaces. It delivers both cooling and heating, making it suitable for year-round use.
This mini split features an inverter-driven compressor for better energy savings and quieter operation. It comes with a wireless remote control, so users can adjust settings easily. Wi-Fi compatibility allows the system to be controlled via a smartphone app.
Installation is straightforward for most users who follow the included instructions, but a professional may be required for best results. With a cooling capacity of 36,000 BTU, it can handle spaces up to 1,500 square feet.
Main features:
-
SEER rating: up to 20 for better efficiency
-
Operating noise: as low as 45 dB indoors
- Includes heat pump functionality
- Pre-charged with eco-friendly R410A refrigerant
The MRCOOL Advantage is a reliable choice for those needing a powerful single-zone mini split.
Best Multi-Zone Mini Splits
Multi-zone mini splits let users control the temperature in different rooms with just one outdoor unit. These options from MRCOOL come in various sizes for different needs, from cooling two rooms to five.
This system is good for small homes or apartments that need climate control in two rooms. The 18,000 BTU condenser supports two indoor air handlers, each managed with its own remote.
It is a ductless model, meaning installation is simpler, especially for those who may want to do it themselves. The kit includes precharged lines for easy connection.
Key features:
- Cooling & heating
- Wi-Fi controls
- Energy efficient (up to 21.5 SEER)
This unit helps save energy while keeping two separate areas comfortable all year.
Designed for homes needing zoned control in three rooms, this package comes with three 9,000 BTU wall-mounted air handlers. Each one works independently and can be set to a different temperature.
The included 50-foot line sets give flexibility for installing each handler far from the outdoor condenser. Wi-Fi control allows for easy changes from a smartphone or smart home system.
Details:
- Total cooling: 27,000 BTU
- Heat pump for year-round use
- Each room gets its own remote control
A good fit for small offices, apartments, or homes with separate bedrooms or living spaces.
This setup serves four zones but comes with two high-capacity 18,000 BTU handlers. It's best for large areas like living rooms, master suites, or big open spaces. Users can add more handlers if needed, as the condenser supports up to four zones.
The package includes two different line set lengths (16ft and 25ft) to give more placement options.
Specs:
- Covers up to four rooms
- High BTU output for larger spaces
- DIY-friendly installation
It supports energy savings with variable-speed operation and lets each zone be adjusted separately.
The 5-zone 48,000 BTU system is made for larger homes or spaces that need custom temperature control in many rooms. This package comes with four air handlers, each rated at 12,000 BTU, and can support one more.
It works for both heating and cooling and can handle a wide range of temperatures throughout the year. Each indoor unit has its own remote and Wi-Fi connectivity.
Main points:
- 48,000 BTU output
- Custom control for up to five areas
- Good for whole-house solutions
It's best for homeowners who want maximum flexibility over comfort in multiple rooms without installing several separate systems.
Key Features to Consider
When choosing a mini split system, it is important to focus on main features like how much power it has, how energy efficient it is, and how it can be installed. Getting the right balance of these will help ensure the system meets the needs of the space and works well year-round.
Cooling and Heating Capacity
The capacity of a mini split system is measured in BTUs (British Thermal Units). This number shows how much space the system can heat or cool.
A system that is too small will not keep up, while a system that is too large may cycle on and off too often, which wastes energy. It is recommended to match the BTUs to the size of the room or area. For example, a small bedroom may only need 9,000 BTUs, while a large living room could use up to 24,000 BTUs.
Some systems are multi-zone, meaning they can handle several rooms at once. These often provide individual temperature control for each area, making them a good choice for larger homes or offices.
Energy Efficiency Ratings
Energy efficiency is important for saving money and lowering energy use. Mini splits often have two main ratings:
-
SEER (Seasonal Energy Efficiency Ratio): Higher SEER numbers mean better efficiency for cooling.
-
HSPF (Heating Seasonal Performance Factor): Higher HSPF numbers mean better efficiency for heating.
A system with a SEER above 20 is considered very efficient, while HSPF ratings above 10 are strong for heating. Many modern mini splits use inverter technology, which adjusts the speed of the compressor to save energy.
It is also a good idea to look for the ENERGY STAR label. This means the unit has met strict standards for energy efficiency set by the EPA.
Installation Options
Mini splits can be installed in different ways, like wall-mounted, ceiling cassette, or floor-mounted units. Wall-mounted types are the most common and are usually the easiest to install.
Ceiling cassette units are good for larger spaces or rooms that need even air spread. Floor-mounted units fit better in rooms with low ceilings or if wall mounting is not possible.
Most mini splits need a small hole in the wall to connect indoor and outdoor units. Some come as do-it-yourself kits with pre-charged lines, which can make installation faster. However, more complex units may need professional setup to make sure they run safely and efficiently.
Benefits of Mini Splits
Mini splits offer greater temperature control and less noise than many standard air conditioning systems. These features make them a popular choice for homeowners who want comfort and energy savings.
Zoned Comfort
With mini splits, users can set different temperatures in each room or zone. This means a family member can keep the living room cool while someone else keeps their bedroom warmer. Each indoor air handler runs independently, leading to more precise control.
Many homes have hot or cold spots due to poor airflow with central systems. Mini splits solve this by allowing people to adjust each unit to match their needs. They are also energy efficient because they only heat or cool rooms that are in use, which helps to lower electricity costs.
People do not have to worry about wasting energy on empty rooms, making mini splits a smart choice for homes with uneven usage across spaces.
Quiet Operation
Mini splits are known for their quiet performance. The main compressor unit sits outside, so the indoor air handlers make very little noise—often as low as 19 decibels, similar to a whisper.
This quiet operation helps keep bedrooms, offices, and nurseries peaceful. There are no loud fans or motors running inside, unlike some window units or central systems. Noise from the outdoor unit is also kept away from indoor living areas.
For those who value a calm space, mini splits can help maintain comfort without disturbance, even when running throughout the night.
Choosing the Right Mini Split for Your Needs
Selecting the best mini split involves checking the room size, number of areas to cool or heat, local climate, and how often the system will be used. These factors determine the size, features, and type of unit that works best for each situation.
Assessing Room Size and Zones
Mini splits come in different types, such as single-zone and multi-zone systems. A single-zone mini split is suited for one room or open area, while a multi-zone unit connects several indoor units to one outdoor compressor, ideal for multiple rooms or zones.
Room size matters because it affects the cooling or heating capacity needed. Capacity is measured in BTUs (British Thermal Units). Use this table to match room size to BTUs:
| Room Size (sq. ft.) |
Recommended BTUs |
| Up to 350 |
9,000 |
| 350–500 |
12,000 |
| 500–800 |
18,000 |
| 800–1,200 |
24,000 |
Accurately measuring each space helps avoid buying an underpowered or oversized unit. For several rooms, a multi-zone mini split may be more cost-effective and easier to control.
Climate and Usage Considerations
Local climate plays a big part in mini split selection. In hot regions, units with high SEER ratings (Seasonal Energy Efficiency Ratio) save more energy. If winters are cold, look for models with low ambient heating features that work efficiently in freezing temperatures.
How often the system will be on matters, too. Frequent use means units with inverter technology and programmable settings can lower electricity bills. For occasional use in guest rooms or garages, basic models may be enough.
Humidity control is another feature to consider for areas with sticky summers. Some mini splits offer built-in dehumidifying modes. Checking these areas ensures comfort no matter the weather or how the space is used.
Maintaining Your Mini Split System
Regular upkeep helps Mini Splits run efficiently and last longer. Taking care of small tasks at the right time can also lower energy use and prevent breakdowns.
Cleaning and Filter Replacement
Mini Splits use air filters to trap dust and particles. These filters should be checked at least once a month, especially during heavy use. If the filter looks dirty, it should be removed and either washed or replaced, depending on the manufacturer's instructions.
To clean a washable filter, gently rinse it under running water until clear. Let it dry completely before putting it back. For replaceable filters, install a new one of the correct size and type.
Wiping the indoor unit with a soft, damp cloth helps remove dust from the outer casing and vents. Avoid using harsh chemicals. Keeping filters and units clean improves airflow and reduces strain on the system.
Seasonal Maintenance Tips
Before high-use seasons like summer and winter, inspect both indoor and outdoor units. Make sure nothing blocks airflow around the outdoor condenser. Clear away leaves, dirt, or snow. Check that the drain lines are not clogged to prevent water damage.
A table below helps summarize basic checks:
| Task |
How Often |
| Clean filters |
Monthly |
| Check drain lines |
Seasonally |
| Inspect outdoor unit |
Seasonally |
Schedule a professional Mini Split service once a year. A technician can check refrigerant levels, look for leaks, and ensure the system works as it should. Regular maintenance supports better performance and fewer unexpected issues.
Frequently Asked Questions
Mini split systems vary greatly in quality, features, and pricing. Brand reputation, energy efficiency, and warranty terms strongly influence which system suits different needs.
How do budget mini splits compare to premium brands in terms of performance?
Budget mini splits can provide good cooling and heating for smaller spaces. However, premium brands usually have better energy efficiency, quieter operation, and longer-lasting parts. The upfront cost for premium systems is higher, but they can save on energy bills over time.
What features should be prioritized when selecting a mini split for home installation?
Energy efficiency ratings such as SEER and HSPF are important to check. Quiet operation, inverter technology, programmable thermostats, and multi-zone options also add value. Consider the system size to make sure it matches the room or home space.
How does the efficiency of different mini split brands compare?
Mitsubishi, Daikin, and LG generally offer higher SEER ratings, which means they use less energy for the same level of heating or cooling. Budget brands like Pioneer may have lower efficiency, but still meet Energy Star guidelines for most home uses. Always check the energy rating label before choosing.
Order your mini splits today from Modern Homestead Co. We provide free shipping across all our mini splits, and we guarantee the lowest prices while ensuring your satisfaction with hassle-free returns and secure shopping. Being authorized dealers, we assure you that you are getting a genuine product coupled with excellent customer service.
