Are Concealed Mini Split Ducted: A Comprehensive Guide

Concealed mini split ducted systems are a highly efficient and flexible heating and cooling solution that can be installed in the ceiling or walls, providing a sleek and modern look. These systems are designed to be hidden from view, making them an ideal choice for homeowners and commercial property owners who want to maintain a clean, uncluttered aesthetic. In this comprehensive guide, we’ll dive deep into the technical details and expert-level insights on concealed mini split ducted systems, covering everything from efficiency and capacity to installation and design.

Efficiency: Maximizing Energy Savings

Concealed mini split ducted systems are renowned for their exceptional energy efficiency, with SEER2 (Seasonal Energy Efficiency Ratio) ratings ranging from 15.1 to 21.5, and HSPF2 (Heating Seasonal Performance Factor) ratings ranging from 3.19 to 9.3. This means that they use significantly less energy compared to traditional HVAC systems to provide the same amount of heating or cooling.

To achieve these impressive efficiency ratings, concealed mini split ducted systems employ advanced technologies and design features:

  1. Inverter Compressor Technology: The compressors in these systems are equipped with inverter technology, which allows them to adjust their speed and power output based on the cooling or heating demand. This results in more precise temperature control and reduced energy consumption.

  2. Refrigerant Optimization: Concealed mini split ducted systems use advanced refrigerants, such as R-410A or R-32, which have a lower global warming potential (GWP) and higher energy efficiency compared to older refrigerants.

  3. Ductwork Design: The ductwork in these systems is designed to minimize air leaks and pressure drops, ensuring that the conditioned air is delivered to the desired spaces with minimal energy loss.

  4. Zoning Capabilities: Many concealed mini split ducted systems offer zoning capabilities, allowing you to control the temperature in individual rooms or zones independently. This targeted approach to heating and cooling can further improve energy efficiency.

Capacity: Versatile Solutions for Any Space

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Concealed mini split ducted systems come in a wide range of capacities, ranging from 9,000 BTU to 60,000 BTU, making them suitable for both small and large residential or commercial properties. This versatility allows you to select the right-sized system for your specific needs, ensuring optimal performance and energy efficiency.

When choosing the appropriate capacity for your space, consider the following factors:

  1. Square Footage: Determine the total square footage of the area you need to cool or heat, and refer to the manufacturer’s recommendations to select the appropriate system capacity.

  2. Insulation and Ventilation: The quality of insulation and ventilation in your building can impact the cooling and heating load, so factor these elements into your capacity calculations.

  3. Climate and Weather Conditions: If you live in an area with extreme temperatures or high humidity, you may need a higher-capacity system to maintain comfortable indoor conditions.

  4. Future Expansion: If you anticipate expanding your living or working space in the future, consider selecting a system with a slightly higher capacity to accommodate your future needs.

Installation: Ensuring a Seamless Process

Concealed mini split ducted systems require professional installation, as they involve running refrigerant lines, communication wires, and drain hoses between the indoor and outdoor units. The installation kit, which includes copper refrigeration lines, communication wire, drain hose, wall cap, sleeve, and putty, is essential for the system to function properly.

To ensure a successful installation, follow these steps:

  1. Site Evaluation: The installer will assess the layout of your building, identify the optimal locations for the indoor and outdoor units, and plan the routing of the refrigerant lines and ductwork.

  2. Outdoor Unit Placement: The outdoor unit, also known as the condenser, should be placed in a well-ventilated area, away from direct sunlight and any potential obstructions that could impede airflow.

  3. Indoor Unit Installation: The indoor unit, or air handler, will be recessed into the ceiling or wall, ensuring a sleek and unobtrusive appearance. The installer will carefully measure and cut the necessary openings to accommodate the unit.

  4. Refrigerant Line and Ductwork: The installer will run the refrigerant lines and communication wires between the indoor and outdoor units, ensuring proper insulation and sealing to prevent leaks. The ductwork will be installed to distribute the conditioned air throughout the desired spaces.

  5. Electrical Connections: The system will be connected to the electrical supply, with the installer ensuring proper grounding and compliance with local electrical codes.

  6. Commissioning and Testing: Once the installation is complete, the system will be tested to ensure proper operation, including checking for any refrigerant leaks, airflow, and temperature control.

Design: Seamless Integration with Your Space

Concealed mini split ducted systems are designed to be slim and unobtrusive, with some models measuring just 12″ high, 35″ wide, and 35″ deep. This compact design allows for easy integration into your ceiling or wall, providing a sleek and modern look that complements your interior decor.

To further enhance the design integration, these systems offer:

  1. Ceiling or Wall Mounting: Concealed mini split ducted systems can be installed either in the ceiling or the wall, depending on your preference and the layout of your space.

  2. Air Intake Flexibility: The air handler can be easily modified to pull in return air from the bottom or the rear, allowing for greater flexibility in the system’s placement and integration.

  3. Customizable Grille Designs: Many manufacturers offer a range of grille designs, colors, and finishes, enabling you to seamlessly blend the system with your existing decor.

  4. Discreet Control Interfaces: The systems often come with sleek, wall-mounted control panels or wireless remotes, ensuring that the control interface blends in with your interior design.

Flexibility: Tailoring the System to Your Needs

Concealed mini split ducted systems offer exceptional flexibility, allowing you to customize the system to meet your specific heating and cooling requirements.

  1. Zoning Capabilities: These systems often feature zoning capabilities, enabling you to control the temperature in individual rooms or zones independently. This allows for targeted climate control, improving energy efficiency and occupant comfort.

  2. Air Intake Options: As mentioned earlier, the air handler can be configured to pull in return air from the bottom or the rear, providing greater flexibility in the system’s placement and integration.

  3. Ceiling or Floor Concealment: Concealed mini split ducted systems can be installed as either ceiling-concealed or floor-concealed, depending on the layout of your space and your personal preferences.

  4. Ductwork Customization: The ductwork can be tailored to your specific building layout, ensuring efficient air distribution and minimizing any visual impact.

  5. Control Options: These systems often come with a variety of control options, including wall-mounted control panels, wireless remotes, and even smart home integration, allowing you to manage the system with ease.

Warranty and Maintenance

Most concealed mini split ducted systems come with a limited warranty, typically ranging from 5 to 10 years for parts and compressors. To ensure the longevity and optimal performance of your system, it’s essential to follow the manufacturer’s recommended maintenance schedule, which may include:

  1. Regular Filter Cleaning or Replacement: The air filters should be cleaned or replaced at the intervals specified by the manufacturer to maintain optimal airflow and indoor air quality.

  2. Refrigerant Level Checks: A professional HVAC technician should periodically check the refrigerant levels and top up as needed to ensure efficient operation.

  3. Ductwork Inspection and Cleaning: The ductwork should be inspected and cleaned regularly to prevent the buildup of dust, debris, and mold, which can impact air quality and system performance.

  4. Outdoor Unit Maintenance: The outdoor unit, or condenser, should be kept free of debris and obstructions to ensure proper airflow and heat dissipation.

By following the manufacturer’s maintenance guidelines and addressing any issues promptly, you can ensure that your concealed mini split ducted system continues to provide reliable and efficient heating and cooling for years to come.


Concealed mini split ducted systems offer a highly efficient and flexible heating and cooling solution that can be seamlessly integrated into your living or working space. With their advanced technologies, versatile capacities, and customizable design options, these systems provide a modern and unobtrusive way to maintain a comfortable indoor environment.

Whether you’re building a new home or renovating an existing property, concealed mini split ducted systems are an excellent choice that can help you achieve your energy-efficiency goals while enhancing the aesthetic appeal of your space.

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