7 The best mini split AC units without duct with the highest ratings SEERThe mini split AC units without duct are known as the most energy efficient type of air conditioning.
Energy efficiency is denoted by a SEER classification. The most energy efficient mini split air conditioners can have a SEER rating above 20. In short, they can produce an incredible amount of cooling energy for a fraction of the electricity costs (compared to other types of AC).
The excellent energy cost – cooling power ratio is the number one reason why AC units divided into mini pipelines are becoming more and more popular.
In recent years, air conditioning engineers of unit type # 1 have suggested when asked: “I want to cool 1 or several rooms at a reasonable price, which AC should I buy?” is the “mini split air AC unit”.
We will see the best mini split air conditioning system in 2021, based on specifications like the SEER classification. LearnMetrics recommends 7 mini split systems
But first, let’s learn a thing or two about what this AC unit really is and the benefits of using it.
We’ll see a quick guide for pipeline mini split AC buyers with 3 key factors to illustrate what makes the best mini splits systems, well, the best.
Our Top Pick
10 Mini Split AC Units Review
- 1. PACKAGE INCLUDES: CASING PIPE – 2 PIECE, CONNECTOR – 2 PIECE, 120° MOVABLE L-SHAPE ELBOW – 1 PIECE, WALL HOLE COVER– 1 PIECE .
- 2. Safe & Tidy: The line covers organize and protect refrigeration pipes and wires on your external walls, which extends the lifespan of your AC unit and reducing maintenance. Keep the wall clean and tidy.
- 3. Protection from the Elements: The cover kit provides essential protection for the refrigerant lines and electrical wiring against the elements. Exposure to sunlight, rain, snow, and other environmental factors can cause damage to these components over time. The cover acts as a barrier, shielding them from UV rays, moisture, debris, and other potential hazards.
- 4. Durable Construction: Typically constructed from durable PVC material, the air conditioner line set cover kits are designed to withstand harsh weather conditions and prolonged exposure to sunlight without deteriorating. This ensures long-lasting protection for your HVAC system components.
- Model Number: AC-122
- Display Type: Digital Display
- Compatible Brands: Mitsubishi AC
- Types of Devices Controlled: AC
- Lightweight and ergonomic design
- Uses standard AAA batteries (not included)
- RETRACTABLE DESIGN WIND DEFLECTOR: This wind deflector boasts a versatile retractable design that accommodates air conditioner units ranging from 22 to 32 inches. It ensures a perfect fit for various sizes without compromising on effectiveness, ideal for different home and workplace settings.
- MESH HOLE DESIGN: The deflector features evenly arranged mesh hole pattern that promotes optimal air distribution while preventing dust and other particles from clogging the flow. This not only enhances the cooling experience but also contributes to better air quality and system efficiency within your indoor environment.
- FLEXIBLE ANGLE ADJUSTMENT: With an intuitive flexible angle adjustment feature, you can direct the airflow exactly where you need it. This customizable angle control helps in maximizing comfort and enhancing the cooling efficiency of your air conditioning unit, tailored to your specific needs.
- UNIVERSAL HANGING DESIGN: Designed for ultimate convenience, the universal hanging mechanism allows easy installation on virtually any air conditioner model. No tools are required, making it a hassle-free solution for redirecting airflow while ensuring that the wind deflector remains firmly and securely fitted.
- PREMIUM PLASTIC MATERIAL: Constructed from high-quality plastic materials, this wind deflector promises durability and longevity. Its robust construction ensures it withstands daily wear and tear while maintaining functionality and appearance.
- Engineering plastic material, professionally designed mini aqua split automatic condensate drain pump
- Suitable for HVAC, air conditioners, dehumidifiers, furniture, ice machines, and other equipment that requires automatic drainage pumps
- "Mini aqua split condensate pump is safe and stable, high efficient and energy saving, with low noise "
- Warranty not applicable for this product
- UNIVERSAL COMPATIBILITY: Designed to fit most mini split air conditioner outdoor units, these mounting pads provide stable support and vibration reduction
- DURABLE CONSTRUCTION: Made from high-density rubber material that effectively absorbs vibrations and prevents noise transmission
- PACKAGE CONTENTS: Set includes 4 black mounting pads with pre-drilled holes and metal threaded studs for easy installation
- LOAD CAPACITY: Each pad is engineered to support heavy AC units while maintaining structural integrity and dampening properties
- DIMENSIONS: Each mounting pad features a sturdy base with mounting holes and raised platform for optimal elevation and stability
- Enhanced Air Filtration: AC filter for split AC effectively captures dust and airborne particles; Helps maintain cleaner indoor air; Suitable for homes and offices.
- Durable Material: Made from high-quality purifying cotton mesh; Ensures long-lasting performance; Resistant to wear with regular use.
- Easy Installation: Designed for quick setup; No tools required for installation; Fits securely on mini wall mounted air conditioner.
- Improved Airflow: Features a breathable design for smooth ventilation; Minimal impact on air conditioner performance; Maintains optimal airflow while trapping pollutants.
- Convenient Packaging: Comes in 7 packs for regular maintenance; Easy to store and replace when needed; Ideal for those seeking to enhance indoor air quality.
- Safe & Tidy: The line covers organize and protect refrigeration pipes and wires on your external walls, which extends the lifespan of your AC unit and reducing maintenance. Keep the wall clean and tidy.
- Protection from the Elements: The cover kit provides essential protection for the refrigerant lines and electrical wiring against the elements. Exposure to sunlight, rain, snow, and other environmental factors can cause damage to these components over time. The cover acts as a barrier, shielding them from UV rays, moisture, debris, and other potential hazards.
- Durable Construction: Typically constructed from durable PVC material, the air conditioner line set cover kits are designed to withstand harsh weather conditions and prolonged exposure to sunlight without deteriorating. This ensures long-lasting protection for your HVAC system components.
- Enhanced Efficiency: In addition to providing protection, the cover kit can also help improve the efficiency of your air conditioning system. By insulating the refrigerant lines, the cover reduces heat exchange between the indoor and outdoor units, preventing energy loss and helping your system operate more efficiently.
- Package Includes: End Cap – 1 Piece, Casing Pipe – 3 Piece, Connector – 2 Piece, 120° Movable L-shape elbow – 1 Piece, Wall Hole cover– 2 Piece, Flexible 360 degree Pipe – 1 Piece, Wall corner Elbow – 1 Piece.
- 【SPECIFICATION】Size:106x47x85mm/4.17x1.85x3.35inches (LxWxH); Package Weight: 1147.6 g; Package Content: 4 Pack.
- 【MATERIAL】Made of natural rubber, which is not only strong but also thick. It can reduce the vibration generated by the air conditioner during operation, thereby reducing certain noise.
- 【HIGH FUNCTION】Mounting bracket can help the outdoor split air conditioner to be used for a longer time, because it can let the air flow through the bottom of the air conditioner, making it in a more refreshing state.
- 【APPLICATION】Suitable for outdoor ductless mini split air conditioners and system condensers.
- Hitachi Split AC with Inverter Compressor: Faster cooling and lower energy consumption with Hitachi Ac . Its variable speed compressor smartly adjusts power based on heat load, ensuring uninterrupted cooling
- Capacity: 1.5 Ton Suitable for medium sized rooms (111 to 150 sq.ft) efficient cooling upto 52°Celsius with 4-Way Swing for uniform air distribution
- Energy Rating: 5 Star Best in class efficiency | Annual Energy Consumption : 774.58 units | ISEER Value: 5
- Manufacturer Warranty: 5 Year Comprehensive on Product, 10 years on Compressor, 5 years on PCB/ Controller. Brand Warranty can be availed using amazon invoice
- Condenser Coil: 100% Copper tubes. Faster cooling and Long Lasting durability with Nano Tech Ultra coating for IDU, Prevents Rust and Corrosion
- Key Features: Auto Convertible, Anti Bacterial Mesh Fliter, Slient and Odour free air, Wave balde design technology, UV Protection Coating, 35% Higher Humidity Removal, 5 Fan Speed
- POWERFUL FILTRATION PERFORMANCE: The AC filter for split AC is specifically designed for split air conditioners, this protective cover effectively blocks dust, moisture, and debris, maintaining optimal AC efficiency and extending lifespan while reducing frequent cleaning needs. The dense filtration layer traps particles
- BREATHABLE NON-WOVEN FABRIC: The AC air purifier filter is crafted from high-quality non-woven material, the cover prevents dust ingress while allowing steady air circulation to avoid moisture buildup. This design enhances indoor air quality by locking dust particles and keeping rooms well-ventilated, making it ideal for homes, offices, or spaces requiring consistent airflow
- QUICK SELF-ADHESIVE INSTALLATION: Each split AC filter features easy-to-use self-adhesive strips for a secure, tool-free setupsimply peel and stick to the AC top. The hassle-free installation ensures a snug fit without complex steps, providing instant protection in minutes. Perfect for renters or homeowners seeking low-effort maintenance solutions
- VALUE 10-PACK WITH UNIVERSAL FIT: The AC air purifier filter includes 10 dust covers (20x80cm) to protect multiple units or enable regular replacements. Designed to fit most standard split AC models from major brands, the flexible size offers reliable coverage. Ideal for large households, offices, or seasonal use, this pack delivers cost-effective, ongoing appliance protection
- PROVEN AIR PURIFICATION: The AC filter net can darken the filter visually demonstrating its absorption efficiency and locking dust particles from household air to release cleaner, fresher oxygen. Suitable for high-dust environments or allergy-prone households, it creates a healthier living space while maintaining AC performance in various scenarios
What is a Mini-Split Air Conditioner System?
The main difference between a traditional air conditioning system and a mini-split is that traditional systems have ductwork and a mini-split does not.
A traditional system uses a blower to suck air from the house through the ductwork and into the main unit’s blower, and then pushes it through an evaporator, which removes the heat from the air. The system continues to push the cooled air out of the system, into more ductwork, and back through the vents in your home. So air from throughout your home is funneled into the main unit, cooled, and returned to the various rooms in your home via ductwork.
A mini-split still operates in the same way, except that it only has to push the air from one room through its evaporator. Instead of having to pump air through ducts that are in the basement, crawl space or attic, it is simply pulling air into the unit from the room it is physically located in, cooling the air, and blowing it right back into the same room. The air never leaves the room it is in.
You might be wondering how a mini-split differs from a window or through-the-wall unit often found in hotels. The obvious answer is that a mini-split unit can be mounted anywhere in a room while a window unit has to be in the window. This makes mini-splits the more secure and aesthetic option.
The most important difference in a mini-split compared to window or through-the-wall units is the location of the noisy compressor. Window units and through-the-wall units are completely self-contained. This means the noisiest part of any air conditioner, the compressor, is in your home when using a window or through-the-wall unit.
A mini-split is like a traditional split-system air conditioning unit because the compressor is in a separate unit outside. The only things connecting the two are the copper lines used to pump the heat transferring refrigerant between the two systems and wiring. A mini-split is much quieter than any of its competition because its fan is much smaller than a traditional units fan because there is no need to move air through ductwork.
In short, mini-splits are more efficient than traditional units because of the absence of ductwork. But they are designed for cooling and heating individual spaces, rather than entire homes. mini-splits are more efficient, versatile, and much quieter than window units and other self-contained options.
The ductless mini split AC is made out of 4 parts:
- Outdoor unit (see sketch below). The compressor enables the compression of the refrigerant. Usually attached to the outer wall.
- Indoor unit (see sketch below). Quiet and elegant part mounted on the inside wall (bedroom wall, bathroom wall, basement wall, etc.). It consists of cooling coils, an air filter, and a blower.
- Refrigerant lines (connection between outdoor and indoor unit). These lines enable the exchange of the refrigerant between the two units. To install it, you need to drill a hole in your wall. Hint: If you can do that yourself, there’s a good chance you can DIY mini split AC installation.
- Remote control or/and mobile app. You can lower or raise the temperature, set a programmable timer, and so on with remote control. With smart mini split ACs, you can connect your smartphone and control the whole AC with a simple app.
Here is what the insides of the indoor and outdoor unit consist of:
What Are The Benefits Of Using A Ductless AC?
The benefits of using a ductless air conditioner instead of ducted one or room air conditioners are quite obvious:
- No ducts. That is as obvious as it gets; the ductless unit can help the central air conditioner or as a stand-alone AC.
- Zone cooling. You can actually pick the room you want to cool down. Do you want to cool down the bedroom? Just install the inside unit on your bedroom wall. You don’t even need a window – this makes a perfect air conditioner for basements. You just need to drill a hole in the wall.
- Quietness. The outdoor unit creates all the noise (because it contains the compressor). That means that the indoor mini split AC unit is quiet as a cat. The noise levels even go below 50 dB; this noise level window air conditioner or portable ones can’t match.
- Superb energy-efficiency. The big brands offer mini split units with a SEER rating of 20 or more, which is incredible. With zone cooling, you don’t need to waste the cooling effect on parts of your house; you don’t need to be cooled.
- Heating. One of the best benefits of ductless AC units is that they often include a high-efficient heater for winter. You can basically use the air conditioner for heating as well.
3 Key Factors To Consider When Buying A Mini Split Unit
Some ductless AC units are obviously better than others.
Here are the 5 rules you have to follow if you want to pick the best ductless AC unit for your house:
1. Right Capacity In BTU (Be Aware Of The Voltage)
Knowing how powerful a mini split AC you need is the first thing you need to figure out. Usually, we have the certain square footage of a room or rooms in mind. Those we want to cool down, of course.
The recommendation is to multiply the room size (in sq ft) by 20-30 to get a BTU value. 20 is the most eco-friendly; 30 basically guarantees you won’t buy a ductless mini split AC that’s too weak.
Here are our recommendations for an average household based on available ductless AC sizes:
| Capacity (In BTU) Of Ductless AC | Room Size (In Sq Ft) |
| 9,000 | 100-350 sq ft |
| 12,000 (1 ton) | 350-500 sq ft |
| 18,000 | 500-700 sq ft |
| 24,000 (2 ton) | 700-900 sq ft |
| 30,000 | 900-1,100 sq ft |
| 36,000 (3 ton) | 1,100+ sq ft |
The 12,000 BTU are the most commonly sold 1-zone mini split ACs. That’s why we have based our comparison of the best mini split ACs by comparing 12,000 BTU models.
In the end, you can also find a connection to 2,3,4 and 5 zone mini split systems.
Note: With the high capacity mini split units, be aware of the voltage. The 15,000+ BTU devices usually need a higher voltage, 208/230V, instead of the standard 110/220V. The high-capacity units will almost always require you to install the 208/230V, which will add to the standard installation costs.
2. Which Are The Best Ductless AC Brands?
Taking the brand into account is very important. The reliability and the brand are very firmly connected in this industry.
The big brands have a good track record and can charge well over $1,000 for a ductless AC unit. The lesser-known brand, on the other hand, can be less trustworthy. The upside of this is that they price their units below $1,000; they are trying to build a good reputation.
Big Brands
Namely, there are two big brands: MRCOOL, LG, and Mitsubishi. They have been in this industry for decades and have a pristine reputation with the mini split AC installers.
In fact, some installers will only be willing to install MRCOOL ductless AC units because they’re aware of just how reliable they are. They are also more willing to give you a guarantee they’ll come back and fix a MRCOOL or LG unit without charge. Because they pretty much know how unlikely a MRCOOL unit is to break down.
Smaller Brands
Obviously, the lesser-known brands don’t have the length of experience in the engineering mini-split system that the big brands have. That doesn’t mean they aren’t any good; it just means they need to prove themselves.
Some smaller brands such as PIONEER, DAIKIN, and Klimaire offer ductless systems that almost reach (but do not breach) SEER 20. They do offer reliable models at a reduced price compared to the big brand name models.
If you want to spend less than $1,000 for a SEER 19 12,000 BTU ductless mini split air conditioner, these lesser-known brands can deliver. The big ones can too, but the price there can be up to 50% higher.
3. Energy-Efficiency And Price (Let’s Talk SEER And HSPF And Dollars)
Here at LearnMetrics, we especially love metrics. For mini split units, the two energy-efficiency metrics are crucial to understanding:
- SEER (Seasonal Energy Efficiency Ratio). Measures how energy-efficient the cooling effect of the mini split AC is. Simple rule: The bigger the SEER, the higher the energy-efficiency.
- HSPF (Heating Seasonal Performance Factor). Same thing as SEER; it’s just for heating instead of cooling.
When determining the energy-efficiency, we really need to look at both the SEER and HSPF. That’s because we don’t use the mini split AC just for cooling but also for heating.
SEER and HSPF affect the electricity bill. As an example, let’s say we use the cooling function 8 hours per day over 3-month summer, and the heating function 4 hours per day over 3-month heat. Also, let’s say that the watt-hour costs 13 cents.
What would be the yearly dollar difference between the #1 AC and the #7 AC on the list? Let’s calculate a bit:
| Metrics | #1 MRCOOL DIY-12-HP-115B | #7 DAIKIN RXB12AXVJU+ FTXB12AXVJU |
| SEER: | 22 | 17.5 |
| HSPF: | 10 | 8.8 |
| Summer cooling cost: | $48.62 | $66.07 |
| Winter heating cost: | $42.87 | $66.07 |
| Yearly cost: | $91.69 | $132.14 |
The difference in yearly cost between a superb mini split AC and an above-average one is $40.45. In 20 years, the difference is $809.02.
The funny thing is the difference in cost between the #1 MRCOOL DIY-12-HP-115B and #7 DAIKIN RXB12AXVJU+ FTXB12AXVJU is actually about $700 to $800.
Note: Over the years, the high SEER and HSPF ratings can save you a lot of electricity (compared with the average SEER, HSPF rating unit).
It’s no wonder that ductless ACs with extremely high SEER and HSPF cost more than $1,000. Big brands create those. On the other hand, the smaller brands assemble high SEER and HSPF units that cost less than $1,000.
Based on these three metrics (and a bunch of others such as dehumidification rates, airflow, noise levels), we’ve compared the best ductless ACs in the 2021 list:
When is the best time to buy an air conditioner?
Avoid buying in peak season if you can; that will be summer in most parts of Australia, but could be mid-winter too if you’re in a colder region. Installers are usually very busy in these periods and you might have to wait some weeks before your new unit can be installed.
If possible, shop around before the peak season starts, so that your new unit is installed and ready for when you’ll need it most.
Alternatively, it can be worth buying just after the season ends. Old stock may be discounted as retailers make room for new models.
How to install a split-system air conditioner
- You’ll need a licensed air conditioner installer because of the gas refrigerant. Look for an installer with ARCtick approval, and get a few quotes. Most traders offer supply and install packages, and some installation only (meaning you’ll need to purchase the unit yourself). To find out more, read our article ‘How much does an air conditioner cost to install or replace?’
- As well as an ARCtick accreditation, your air conditioner installer should have an electrical qualification in order to wire your air conditioner into your home. Many don’t, but this means they will be unable to offer a warranty on the electrical work, only the air conditioner itself. Likewise, plumbing your air conditioners’ drain into your home’s stormwater system needs to be performed by a qualified plumber. So check that the installer you choose has the necessary accreditations to carry out the whole installation.
- It’s generally better to install an air conditioner on a longer wall of a room, and not directly above a window, but your installer should recommend the best place for your individual situation.
- The outdoor unit of your split-system needs to be installed on a firm base (for example, a concrete slab) or attached to a wall using sturdy brackets. It should be as close as possible to the indoor air outlet, ideally with about three to five metres of pipes between the two units.
The compressor should be installed on a firm base or attached to a wall with sturdy brackets, and protected from direct sunlight.
- Shade the outdoor part of your air conditioner from direct sunlight – for example, by installing it on a southern wall or providing an awning.
- Single-phase power is all you need for most single (and multi) split-system air conditioners. Three-phase power might be needed for very large multi-split or ducted systems, say 20kW capacity or more.
- Once you’ve got your air conditioner, don’t forget to clean the filters periodically and have the unit serviced regularly.
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