Installing a mini split air conditioner in the wrong location can negatively affect its performance and efficiency. Here are some key areas to avoid:

• Heat Sources

Avoid installing a ductless HVAC unit near heat sources such as stoves, radiators, or areas with direct sunlight, as excessive heat can reduce its efficiency. If you don't have enough space, try to install the mini split AC unit 3-5 feet away from heat sources.

• High-Humidity Areas

It’s not recommended to place the unit in high-humidity areas like bathrooms or kitchens without proper ventilation, as moisture can affect mini split unit's cooling performance and probably lead to mold or corrosion over time.

• Low Ceilings or Cramped Spaces

Mini split HVAC units need sufficient space for air circulation, so avoid low-ceiling rooms or cramped areas that may restrict airflow, like the places behind furniture or curtains. Della advises installing mini split AC units in the room with a ceiling height of at least 8 feet or ensuring a clearance of at least 4-6 inches on all sides of the indoor unit.

• Too Far from the Outdoor Unit

If the distance between the indoor and outdoor units is too long, the refrigerant has to travel further, resulting in reduced pressure and lower cooling power. Ideally, the distance between outdoor and indoor units should be kept under 30 feet, with a maximum of 50 feet.

• In Areas Without Proper Drainage

Ensure the installation location has proper drainage to prevent water accumulation, which could damage the unit over time.

A mini split air conditioner typically lasts between 10 to 15 years on average. If you perform proper maintenance for your mini splits, it could last about 20 years, including cleaning the filters, checking refrigerant levels, ensuring proper drainage, etc.

To determine the right size for your ductless mini split, a general rule of thumb is to use 20 BTUs per square foot of space. For example, if your room is 400 sq. ft., you would need a 9,000 BTU unit (400 x 20 = 8,000 BTUs). However, factors like room insulation, ceiling height, and sunlight exposure can affect the exact size needed.

Here’s a simple guide to help you choose the appropriate BTU based on your room size:

9,000 BTU Mini Split: 0–400 sq. ft. (Small bedroom or office)

12,000 BTU Mini Split: 401–550 sq. ft. (Medium-sized bedroom or living room)

18,000 BTU Mini Split: 551–1000 sq. ft. (Large living room or open floor plan)

24,000 BTU Mini Split: 1001–1500 sq. ft. (Large living room or multi-room areas)

36,000 BTU Mini Split: 1501–2500 sq. ft. (Large rooms or open spaces)

The average cost of installing a mini split system across the U.S. typically ranges from $2,000 to $8,000 (including labor and product costs).

For a single-zone mini split system, which serves just one room or area, the typical total installation cost is between $2,000 and $5,000. On the other hand, for multi room mini split systems, which can heat or cool multiple rooms with separate controls, costs range from $5,000 to $15,000.

Other factors that can impact costs include:

• Labor Costs: Professional installation typically accounts for 50-60% of the total cost.
• Electrical Work: If the system requires electrical upgrades, this can add an extra $500 to $2,000 to the overall cost.
• Distance Between Units: Longer refrigerant lines or more complex installations can increase the cost.

While it is technically possible to install a mini split system yourself, professional installation is strongly recommended. Mini splits involve handling refrigerant, electrical wiring, and complex components that require specialized knowledge and tools. Improper installation can lead to poor performance, system damage, or even void your warranty.

Additionally, many local codes and regulations require a licensed HVAC technician to install the system, particularly when dealing with electrical work and refrigerant lines. For example, in many areas, the installation of ductless HVAC unit must meet National Electrical Code (NEC) standards, and refrigerant handling requires certification under EPA 608 to ensure safety and compliance. Professional technicians ensure the installation meets these codes and that the system operates safely and efficiently.

With SEER ratings typically ranging from 17 to 23, Della mini splits are built to provide high seasonal energy efficiency, which helps reduce your monthly utility bills. Della mini splits can be up to 30% more energy-efficient than traditional HVAC systems. For instance, Della's Vario (TL) series mini split AC with a SEER 19 rating can provide cooling at a rate of 21 BTUs per watt of energy consumed. If you run the system for 500 hours in a cooling season, and the unit consumes 1,000 watts (1 kW) per hour, you can expect an estimated monthly energy cost of about $50 to $80 ($0.12 to $0.15 per kWh).

Della's ductless mini splits, including the mini split heat pump system, offer significant energy savings, thanks to their advanced inverter technology. This technology adjusts the compressor speed based on real-time temperature needs, ensuring that only the necessary energy is used for optimal cooling or heating. In addition, Della’s mini splits feature a no-duct design, which eliminates the energy loss typically associated with traditional ducted systems. Moreover, the great heat pump function in Della's models allows for efficient heating during colder months by transferring heat from the outside air into your home, using minimal energy.

This combination of features makes Della’s mini splits an excellent choice for those looking to save on energy costs while maintaining a comfortable indoor environment year-round.

Della's mini split systems come with different line set lengths depending on the model. For example, the Motto (JA)/Umbra (JPB)/Vita (QC) series includes a line set that is 13 feet long, the Vita (QC) series has a line set of 9 feet, and the Econo (IF)/Vario (TL)/Opitma (TP) series offers a line set of 16 feet.

While the outdoor unit is precharged with refrigerant, it’s important to note that line sets are not precharged. You will need to ensure that the correct amount of refrigerant is added after the line set is connected during installation. This ensures optimal system performance and efficiency.

Della's mini split air conditioners feature an Auto Mode that automatically adjusts the system's operation based on the indoor environment. Here's how it works for different models:

For Motto (JA)/Umbra (JPB)/Vita (QC) series:

• When the air conditioner enters Auto Mode, it displays the room temperature. The system defaults to 75℉ for cooling and 68℉ for heating.
• In the first 20 seconds after starting, the system runs in fan mode at low speed. After this, the system switches to either cooling or heating, depending on the indoor and outdoor temperatures.

The system logic works as follows:

• If the indoor temperature is above 75℉, it switches to cooling mode.
• If the indoor temperature is below 75℉, it switches to heating mode.

For Econo (IF)/Vario (TL)/Opitma (TP) series: The system operates based on the temperature difference between the room temperature and the set temperature:

• If the room temperature is higher than the set temperature, it switches to cooling mode.
• If the room temperature is lower, it switches to heating mode.
• If the room temperature is equal to the set temperature, the system stays in fan mode.

Della offers several mini split air conditioning models, each designed with unique features to meet different needs. Here’s a look at the key differences:

Econo (IF) series

SEER2: 17

This is Della's economy model, designed to offer basic cooling and heating functionality at a more affordable price point.

It is ideal for users looking for a cost-effective option for smaller spaces or less demanding environments.

While it offers good efficiency, it is the least efficient among the three in terms of SEER2 rating.

Vario (TL) series

SEER2: 19

The Vario (TL) series mini split air conditioning offers a balance of affordability and enhanced performance. This series provides a higher SEER2 rating compared to the Econo (IF) series, meaning it consumes less energy to deliver the same cooling/heating output.

It includes features that make it suitable for multi-zone applications, making it a Vario tile choice for larger spaces.

Opitma (TP) series

SEER2: 20, 22, 23, 24 (depending on the specific model)

The Opitma (TP) series mini split AC unit provides the highest energy efficiency and best performance.

With SEER2 ratings ranging from 20 to 23, this series is designed for users who prioritize maximum energy savings, especially in larger homes or areas with higher cooling or heating demands.

Motto (JA) series

The Motto (JA) mini split HVAC units series is an entry-level model designed for standard use, offering basic functionality at an affordable price point. It is suitable for moderate climate conditions, with a decent climate range that performs well in typical environments.

Umbra (JBP) series

The Umbra (JBP) series focuses on premium features and advanced technology, including Wi-Fi compatibility, allowing you to control your unit remotely via smartphone. It also boasts higher energy efficiency, quiet operation, and a sleek, modern design, making it suitable for a variety of residential or light commercial applications. Energy-saving capabilities are enhanced compared to the Motto (JA) series, providing better efficiency.

Vita (QC) series

The Vita (QC) series ductless HVAC unit is the premium model, designed for those who prioritize top performance and efficiency. With advanced energy-saving features, it ensures maximum efficiency and reduced energy consumption. The use of R32 refrigerant also enhances its environmental friendliness. This series often qualifies for rebates, making it an excellent investment for users seeking high-end performance and long-term savings.

Serena (M) Series

The Serena (M) Series is an intelligent, Energy Star-certified HVAC unit engineered for exceptional energy savings, with a remarkable 22 SEER2 rating that can lower cooling costs by up to 57%. Powered by an advanced Inverter and MightyAir X technology, it delivers quiet comfort and often qualifies for government rebates, making it a smart investment for long-term, worry-free performance.

As a 12,000 BTU unit is recommended to cool 500 to 600 square feet, for a 1500 square foot house, you will likely need 2 to 3 mini split units:

If your house has an open floor plan, you may only need a two zone mini split sytem (one for the living area and one for the bedrooms or other spaces).

If your house has multiple separate rooms, you may need a 3 zone mini split system, each serving a different zone, such as the living room, kitchen, and bedrooms.

Della mini splits are made by trusted manufacturing partners and supported by Della in the U.S. Every model is built to our specifications and tested to U.S. standards, so you can count on comfort that feels just right.