Installing a ductless mini split system can be a cost-effective and convenient way to cool your home. With installation costs running in the thousands of dollars, it's no wonder that many homeowners are turning to DIY mini splits as an attractive option. Not only can it save you money, but it can also be a fun project to tackle on a lazy afternoon. However, not all mini split systems are created equal when it comes to ease of installation, energy efficiency, and reliability.
To help homeowners with technical skills, LearnMetrics has compiled a list of the best DIY mini splits currently on the market. These units have been selected based on their ease of installation and their specifications, including SEER rating, HSPF rating, specified coverage, and reliability. So, if you're considering installing a mini split system yourself, keep reading to find the perfect unit for your needs.
Why Choose a DIY Mini Split?
First, let's take a look at why DIY mini split systems have become so popular. The main reason is the significant cost savings compared to professional installation. Installing a 1-ton ductless mini split by yourself can cost as little as $0, while professional installation can cost around $2,000. That's a substantial difference that can make a big impact on your wallet.
Of course, not all mini splits that come with an installation kit are easy to install. That's why it's crucial to choose a unit that offers both convenience and reliability. In this article, we'll guide you through the key factors to consider when selecting a DIY mini split and provide step-by-step instructions on how to install it yourself.
Factors to Consider When Choosing a DIY Mini Split
When selecting a DIY mini split system, there are four key specifications you should focus on:
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Size: Determine the cooling capacity you need based on the square footage of the area to be cooled. As a general rule of thumb, you'll need about 20 BTU per square foot. For example, a 1-ton DIY mini split can adequately cool a 600 sq ft space.
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Cooling Energy Efficiency: Look for a DIY mini split with a high SEER (Seasonal Energy Efficiency Ratio) rating to reduce cooling running costs. Aim for a unit with at least an 18 SEER rating.
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Heating Energy Efficiency: DIY mini splits can also provide heating in the winter. To lower heating costs, choose a unit with a high HSPF (Heating Seasonal Performance Factor) rating. Aim for at least an 8 HSPF rating.
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Reliability: Select a reliable brand known for its durable and long-lasting mini split units. Some of the best brands in the DIY mini split industry include MrCool, Cooper & Hunter, and Pioneer.
Based on these specifications, you can choose the best DIY mini split system that meets your needs. Let's now dive into the installation process.
How to Install a DIY Mini Split System
Installing a DIY mini split system is easier than you might think. All DIY mini splits come with an installation kit and a comprehensive installation manual. The manual will guide you through every step of the installation process. Let's provide a rough step-by-step outline of how to install and wire a DIY mini split system:
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Outline the location of the indoor unit: Use the wall template provided in the DIY kit to measure the precise location for the indoor air handler. Mark the holes for the refrigerant lines on the wall.
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Set up the mounting template: Attach the mounting plate to the marked location on the wall using the hardware provided in the kit.
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Drill a hole for refrigerant lines and wires: Use a hole saw to drill a hole for the refrigerant lines and wires. Insert a wall sleeve into the hole and cut off any excess sleeve sticking out of the wall.
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Install the indoor air handler: Pass the communication wires, refrigerant lines, and drain hose through the hole in the wall. Mount the air handler on the mounting template and secure it with the provided hardware.
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Start with the outdoor unit: Guide the refrigerant lines and communication wires along the wall in a downward direction. Use the included lines cover to insulate and secure them from outside elements.
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Connect the refrigerant: Match the color-coded caps on the refrigerant lines from the air handler with the corresponding lines from the outdoor unit. Connect them securely.
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Open the valves: Remove the cover from the valves on the outdoor unit and open them using an Allen wrench provided in the kit.
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Secure the refrigerant connection indoors: Cover the refrigerant connectors at the back of the indoor air handler with noise-reducing pads and vinyl tape included in the kit.
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Wire the mini split: Follow the color and number labels on the wires to connect them properly. Make sure to check the voltage requirements for your specific unit.
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Complete the installation: Install the air filter in the indoor air handler and insert the smart controller for smartphone connectivity. Once everything is in place, turn on the unit and control it using your iOS or Android phone.
Installing a DIY mini split system may seem daunting, but with the detailed manual provided in the DIY kit, most homeowners with basic technical skills can complete the installation in a single afternoon.
Tools for DIY Mini Split Installation
The tools you'll need for a DIY mini split installation depend on the specific unit you choose. Some DIY manufacturers, like MrCool, provide comprehensive installation kits that include most of the necessary tools. However, it's always a good idea to check beforehand to ensure you have everything you need. Here are some commonly used tools for DIY mini split installation:
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Hole saw: Essential for cutting a hole in the wall to accommodate the refrigerant lines and wires.
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Drill: A cordless drill is highly recommended for various installation tasks.
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Vacuum pump: Necessary for evacuating the refrigerant lines, although many DIY kits come with pre-charged lines, eliminating the need for a vacuum pump.
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Adapter for mini splits: The specific adapter will depend on the type of refrigerant used in your unit.
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Gauge: A manifold or micron gauge is useful for measuring the refrigerant pressure inside the lines.
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Flare tool: Required for mounting the indoor air handler and bending the refrigerant piping, if applicable.
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Allen wrench: Used for opening the valves on the outdoor unit.
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Torque wrench: Useful for securely tightening connections.
It's worth noting that some specialized tools may not be included in all DIY installation kits. Make sure to check the contents of the kit before starting the installation process. If you don't have the necessary tools, they are usually available at your local home improvement store.
Do You Need a Permit to Install a DIY Mini Split?
In most cases, a permit is required for DIY mini split installation. This is a formality and helps ensure that the unit is installed correctly and safely. The permit typically costs between $10 and $30 and grants you the authorization to install the unit yourself. However, if you choose to hire a professional installer, they will handle the permit process for you.
After the installation is complete, you will need to notify your local authorities about the newly installed mini split. An inspector will visit your property to ensure that everything is installed properly. The inspection usually takes less than 10 minutes and incurs a fee of up to $50. During the inspection, the following aspects are typically checked:
- Are all holes sealed properly?
- Is the piping or ducts securely fastened every 4 feet?
- Were grommets used for thermostat wires?
- Is the amp breaker or fuse the right size?
- Was any ductwork sealed during the installation?
As long as you follow the instructions provided in the DIY manual, passing the inspection should be a breeze.
The Best DIY Mini Split Systems for Easy Installation
Now that you're equipped with the knowledge of how to install a DIY mini split system, let's take a look at the best options available on the market:
1. MrCool DIY Mini Split Units
MrCool is the leading brand in the DIY mini split industry, known for their user-friendly installation process and high-quality units. They offer four models in their DIY 4th generation series:
- 12k unit with a 22 SEER rating (up to 600 sq ft coverage)
- 18k unit with a 22 SEER rating (up to 900 sq ft coverage)
- 24k unit with a 20 SEER rating (up to 1,200 sq ft coverage)
- 36k unit with a 16 SEER rating (up to 1,500 sq ft coverage)
These units are designed to be installed by regular homeowners with basic technical skills. The installation kit includes everything you need, including pre-charged lines, tools, and a comprehensive manual. With their variable-speed inverter compressors, MrCool units achieve exceptional energy efficiency, resulting in low running costs. They also offer smartphone connectivity for remote control via the SmartHVAC app.
2. Klimaire DIY Mini Splits
Klimaire is another reliable brand that offers DIY mini split units at a more affordable price point. They provide three models:
- 12k unit with a 20 SEER rating (up to 600 sq ft coverage)
- 18k unit with a 19 SEER rating (up to 900 sq ft coverage)
- 36k unit with an 18 SEER rating (up to 1,500 sq ft coverage)
Klimaire units are relatively easy to install and offer good energy efficiency. They come with installation kits that include pre-charged lines and instruction manuals. While the wiring may be slightly more challenging than with MrCool units, homeowners with basic technical skills should have no problem installing them.
3. Cooper & Hunter DIY Dual-Zone Units
For those looking for multi-zone mini split systems, Cooper & Hunter offers excellent DIY options. Their dual-zone units provide a more homogeneous cooling experience for your home. The available models are:
- 2-zone 28,000 BTU unit with a 22 SEER rating (up to 1,400 sq ft coverage)
- 2-zone 36,000 BTU unit with a 22.5 SEER rating (up to 1,800 sq ft coverage)
While dual-zone units are more challenging to install than single-zone units, Cooper & Hunter offers detailed instructions and installation kits that simplify the process. These units provide superior energy efficiency and ensure even cooling throughout your home.
4. Pioneer Diamante Series DIY Mini Split Units
If you're looking for a budget-friendly option, Pioneer Diamante Series DIY Mini Split Units are a great choice. They offer the most affordable DIY mini split units on the market. Pioneer provides various models with different capacities:
- 9k unit with up to 300 sq ft coverage
- 12k unit with up to 600 sq ft coverage
- 18k unit with a 19 SEER rating
- 24k unit with an 18 SEER rating
- 36k unit with a 17 SEER rating
Pioneer units are especially attractive for smaller homes or individual rooms. While the installation kit may not be as user-friendly as MrCool's, these units still offer good energy efficiency and cost savings.
In conclusion, DIY mini split systems are an excellent option for homeowners looking to save money on installation costs. By choosing the right unit and following the provided instructions, you can install a mini split system yourself with relative ease. Consider the best DIY mini split brands mentioned above and select the model that suits your needs and budget. Happy cooling!