Della Mini Split Reviews: Ductless AC Comparison

Della mini split air conditioner systems are not the only brand you have to choose from. They are also not at the top of many “best of” lists you may encounter on the internet or through your research.

Not until now. Della is a brand that not many have heard of or done much research on. But that is about to change. In this Della mini split AC review, we will look at the most energy-efficient, cost-effective, and easiest models to install. By the end, you will understand the reliability of the Della name.

DELLA 18,000 BTU Mini Split Air Conditioner &...
  • [AUTOMATIC SYSTEM] This air conditioner is...
  • [SMART SENSOR] The unit will sense room...
  • [QUIET OPERATION] This air conditioner is...

Della mini split air conditioners are among the leaders in efficiency based on BTU capacity and output. They have one of the highest airflow CFM outputs of any major brand. Once installed, the systems are easy to operate, run smoothly, and are exceptionally quiet.

While there are small variances between the models, the prominent factors remain the same. The Della 18000 BTU model is the most popular and will be the main focus of this review for that reason.

Della Mini Split Air Conditioner (18k)
Cooling Capacity 12,000, 18,000, 24,000, 36,000 (total) BTU
Heating Yes
Dimensions 37 x 9 x 13 inches (Indoor) 32 x 13 x 22 inches (outside)
Type Ductless mini-split system with multiple air handlers
Warranty 1-year parts, 5-year sealed system
Smart Controls None

Della Mini Split Review

Sizes and Capacities

Della doesn’t produce as many sizes and BTU capacities mini split systems as many other brands. However, the ones they do make are well put together and reliable. Along with the 18,000 BTU model, you will also find 12,000, 24,000, and a 36,000 BTU model.

All of the models are between 17 SEER and 22 SEER, which isn’t the highest on the market, but it is still a high rating. The fact that they can make a standardized efficiency rating across the entire line is a feat in and of itself.

Dimensions and Power Requirements

You will find that the different sized models also come in different dimensions. The air handlers (inside units) generally measure about 35 to 45 inches long and about a foot tall. Larger models will protrude between 8 and 12 inches from the wall, which is critical to keep in mind when finding an installation location.

The outside unit is also relatively small in comparison to other brands. They stand less than 3 feet tall and only need about a foot of clearance. The smallest unit, the Della 048-MS-12K1V-17S-I+O, uses a standard 115v circuit.

All other models are 208/230v systems that require a dedicated circuit. Once wired, though, they are stable, reliable, and won’t cause brownouts or excessive power draws when they come on.

Installation Methods

Della Mini Split Installation

All of the Della mini split systems are capable of DIY install. If you do not have the time, knowledge, or tools, though, professional installation is still highly recommended.

With a professional contractor, the installation costs will vary depending on the number of air handlers, the distance between the furthest air handler and the heat pump, and the number of holes needed to run wiring and refrigeration lines.

If you do decide to follow the DIY route, the steps are pretty straightforward. However, it is essential to note the measurements and mounting locations need to be exact. We cover more about the installation process further below for you.

Noise Levels & Efficiency Ratings

Della mini splits have a major claim to fame and popularity, and this is the noise levels. All models fall within the same noise range regardless of speed, operational mode, or length of usage.

Noise is rated in decibels (dB), where lower numbers are quieter. Unlike standard measurements, though, decibels are compounded, meaning a 20 is not double the level of 10, but 200 times louder, and so on.

As an example, hairdryers and vacuum cleaners within 5 feet of us produce about 60 to 70dB. A typical conversation in a quiet room is between 40 and 50 dB. And Della mini split ACs range between 30 and 49dB.

Pricing and Warranty

When you go to purchase a Della mini split AC, you will find that the pricing is about the industry average. It is also based on your location, current supply and demand of the market, and where you make your purchase.

You will also notice a price difference based on the size, capacity, and the number of air handlers. Of course, professional installation will add to the overall cost, too. On average, though, you can expect to pay between $650 and $1200 for a Della system (excluding installation).

The warranty, though, is the same across the board. All Della mini split AC models come with a 1-year warranty on all parts and labor, including the filters, wiring, and refrigerant lines. The compressor and the sealed system are covered for a period of 5-years.

Once you make the purchase, you should head to the Della website and register the mini split system so the coverage can begin immediately.

Unique Features Of Della Mini Split Air Conditioners

Della mini splits have a lot of features that seem to change continuously. This change, though, is due to the production team listening to the concerns and comments of their consumers. The brand makes changes to meet the needs of those that buy their products.

Cooling Power

By nature, mini split systems have high output and BTU capacities. The cooling power for Della systems ranges between 9000 BTU and 24000 BTU. This is per air handling unit, and not always a total.

For example, a multi-head system will use 4 air handlers and have a total of 24000 BTUs. Each air handler will have a cooling power of 6000 BTUs.

Quiet Operation

Della units are quiet, and even on high speeds or with constant running, the decibel ratings stay at low levels. On average, the Della mini splits will maintain a noise rating of 54 to 58 dB. On certain models when running on high, the noise levels can rise over 60dB, but for the most part, they won’t get much higher than that.

Inverter Technology

Inverter compressors are among the most efficient on the market right now. They use multi-stage sequencing that never entirely shuts off. Instead of having a single-speed or even dual speeds, inverter compressors have dozens or hundreds (depending on type) of speeds.

This allows the compressor to run only as fast and drawing the minimal amount of energy needed. By not coming to a complete stop, they also don’t require as much start-up wattage to get moving faster when the system needs to turn on.

Energy Costs

With inverter technologies and other efficiency help, mini split systems can actually lower your annual energy costs. In some cases, you can save up to 35% annually, and with the use of fans to help spread the colder air around, you may be able to save even more.

Energy costs are rated by the overall efficiency of the system as a whole. It will vary based on how much energy it draws (wattage), the BTU output, and how many hours the system runs each day.

Coverage Area

The coverage area is the size of the space you intend to cool. The BTU output capacity of the unit you buy is what determines the coverage area of the unit. On average (though it does vary), you can expect to cool or heat a single square foot of space per 20 BTUs.

The coverage area you intend to cool will help you decide what size of mini split unit you need. Larger units can, obviously, cool and heat larger spaces.

Remote Control

Della Mini Split Remote ControlRemote operation is critical for mini split systems.

Not only does it make operation easier, but you can also control all of the air handlers with a single remote.

Some models will have WiFi capabilities.

When connected to a network, you can use mobile apps and voice commands for additional control options.

Note that not all mini split systems, Della brand or otherwise, will have wireless connectivity.

Multi-Functional Options

With Della mini splits, you have multi-operational modes such as fan only or multiple cooling modes. Some options have optional heat as well, so you can use the system year-round. Many options also have dehumidifying modes to help reduce the humidity and moisture in your home’s air.

What We Like
  • Inverter compressor for higher efficiency
  • Extra long 25 ft precharged refrigerant lines
  • Follow Me remote sensors
  • Cooling, heating, dehumidifier, and fan modes
  • Self-diagnosis technology
  • Covers up to 2250 sq. ft.
What We Don’t Like
  • Customer service can be hard to get a hold of
  • Mini split warranty could be longer

How Does a Della Mini Split AC Work?

Mini split systems come in two main forms, ducted and ductless. Ducted systems are generally installed when upgrading a central AC system. You can use the same air ducts that are already installed, saving time and money.

Ductless systems use air handlers in each room, or only the rooms you need, and are connected by power lines and refrigeration lines. There aren’t any air ducts, so new construction and installation in homes without a prior AC system are ideal for new ductless systems.

Mini split systems use a heat pump on the outside of the home. The compressor runs in both directions, so when you need to cool the home, it runs in normal direction cooling the air and releasing the cold air in the home.

When the temperature is too cold, the system will reverse, pulling the cold air from the home and releasing it inside, making the house warmer. As a result, the two-way systems are much more efficient, cost-effective, and easier to install.

The cost savings, along with the high efficiency and annual savings, make mini split systems the go-to air conditioning solution today.

Related ArticleWhat is a Mini Split System

Della Vs Other Mini Split AC Brands

Like Della, many air conditioner brands produce high-quality mini split systems. Pioneer min split is well known in the industry for highly efficient systems. With over 20 years in the industry, Pioneer knows a thing or two about air conditioning.

There are 6 models that are big sellers, and each one is highly efficient. The Pioneer systems run between 9000 and 36000 BTUs (total), which is higher than Della. However, the efficiency ratings average about the same.

Mitsubishi mini split systems are among the highest efficiency systems on the market. They are built strong, long-lasting, and extremely durable. With an average SEER rating over 20, the entire lineup is worth investing in.

Della doesn’t make a system as large as Mitsubishi, so they don’t match the SEER rating, but they do come close. In fact, Della systems are rated as high as Mitsubishi in energy efficiency.

Where Della really stands out is with their warranties. Mini split systems come with a 1-year parts warranty and a 5-year sealed system warranty. This is about industry average, but the additional sealed system warranty is not as common as it should be.

Della Mini Split Vs Della Portable AC

Della Mini Split Vs Portable AC

Della doesn’t only produce mini split systems. The company got its start with kitchen appliances and still has a large market appeal in the space. However, their home climate control side includes window ACs and portable air conditioning units as well.

The Della portable ACs are modern, sleek, and stylish. Unlike other brands, they are also built based on customer needs, demands, and even complaints. The production teams take all advice and ideas from their consumers and build units based on this feedback.

As of this writing, Della has four mini split models for sale. While you can find some of their older models online, current models are the most efficient, stylish, and thoroughly designed units. You will get LED touch displays, remote controls, and WiFi capabilities.

Compared to the mini split systems, the portable units aren’t nearly as efficient. However, they are less expensive and capable of cooling a room up to 700 square feet. The 2-year warranty for a Della portable AC is above average for these types of units. Generally, a portable AC will come with a 1-year warranty.

If you do choose Della, you get a reliable system that has a lot of user-friendly features, whether you choose a portable, window unit or mini split,.

Della Mini Split AC Installation Tips

Installing a mini split system can be a DIY project if the brand allows it. Many brands ship the units precharged, so there is no need for EPA certifications to install. However, you need to read the warranty coverage carefully.

Some warranties will require professional installation and even professional annual inspections. If you wish to maintain (or even start) warranty coverage, you may be hand-tied into using a professional.

We can help with that. We have partnered with to bring you local, professional contractors that are checked and reviewed, so you don’t need to worry about quality or performance.

Still, if you do have a model that is DIY capable, you will need to follow the instructions that come with the unit. These will outline the exact measurements required for spacing, mounting, hole drilling, and wire placement.

Each model is different and will have additional requirements. However, the basic process will look like this:

  1. Measure and mount the heat pump outside of the home.
  2. Measure the location of the holes needed for wiring and refrigerant lines and drill the required holes.
  3. Inside the home, locate the mounting location for the air handlers and mark the spots for the required holes.
  4. Drill the holes for wiring and pass them through to the heat pump outside.
  5. Run the refrigerant lines to the heat pump and air handler without opening the valves.
  6. Connect the power source to the air handler and mount the handler to the wall in the proper location.
  7. Supply power to the heat pump and ensure all connections are secure.
  8. Slowly open the refrigerant line valves and check for leaks.
  9. Turn the unit on, following initial start-up procedures.

Della Mini-Split Troubleshooting Tips

As with any machine with moving parts and electrical devices, things will go wrong from time to time. We have taken the most commonly reported issues with Della mini split systems and added possible causes and solutions to this chart to help you out.

Problem Cause Solution
Della mini split error code E5 Communication problem between air handler and heat pump Generally, a minimal electrical signal or a glitch in the start-up process causes the code. If a system reset doesn’t remove the error code, you must call a qualified maintenance specialist.
Della mini split output low Airflow is blocked Clean vents, coils, and air filters to improve airflow.
Della mini split doesn’t turn on Tripped breaker Check the circuit breakers for a tripped breaker and restore the power.
Della mini split is on but not cold Airflow blocked or low refrigerant levels Check coils and filters and clean as needed. If airflow is good, call a professional to test the refrigerant levels.

People Also Ask (FAQ)

How do you program a Della mini split remote?

Most remotes are already paired with the air handler unit it ships with. However, if the pairing ever fails or you want to pair to a new air handler, you can do so easily. Remove the battery cover on the remote to expose the heat and cool toggles. Move both to the right and then back to the left.

Under the filter panel on the air handler is another set of toggles. Flip these toggles as well, then point the remote at the sensor pressing the power button until the system turns on.

What size breaker do I need for a mini split?

While each mini split will have slightly different requirements, it is generally accepted that each air handler will require a 20A breaker. Some require 15A to run, while the heat pump (outside unit) can use up to 60A, though a general install uses 30A circuits.

How long does it take to DIY install a ductless mini split?

If you have some experience with electricity in the home and using basic hand tools, you can install a mini split system with a single air handler in about 6 hours. Most installs recommend two or people and at least 8 hours to perform the job well. You can add 2 to 3 hours per air handler or longer if you need to work slower.

Should I get an HVAC contractor to install my AC unit?

Hiring a professional to install your mini split AC unit is always a wise choice. With the number of things that can go wrong, having someone licensed and prepared for any situation that may come up is helpful. It may also be required for the sake of the warranty, home owner’s insurances, or other cases.


Della mini split systems are highly rated and highly efficient. While they aren’t a well known brand for their AC components as of yet, their popularity is rising.

With durable and reliable systems, Della is on its way to being a household name. Along with the mini split systems, you can also find Della portable and window AC units. All of which have professional parts, reliable service, and highly efficient output. You won’t be disappointed.

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