A Comprehensive Guide to Selecting and Installing Ducted Split Systems for Residential and Commercial Buildings

The Green ducted split system, with its consistent performance, dual cooling and heating functionality, and zoning capability, is an ideal solution for residential, office, and commercial spaces. In this guide, we will explore the key aspects of selecting, installing, and maintaining this system.

Ducted Split Systems: A Modern Approach to Integrated Air Conditioning

Ducted split systems are among the most widely used HVAC solutions in residential, office, and commercial buildings. Thanks to their combined cooling/heating performance, flexible design, and ability to deliver uniform air conditioning, they are particularly suitable for spaces with multiple rooms or sections.
A ducted split system consists of two main components:
•    Indoor unit (air handler) – installed within a false ceiling.
•    Outdoor unit (condenser) – typically placed in open areas such as rooftops or balconies.

These two units are connected via copper piping and control cables, working together to maintain the desired indoor climate.
Air distribution occurs through a duct network: air is cooled or heated inside the indoor unit, then delivered through ducts to outlets across the building. This ensures uniform comfort throughout all areas. One of the major advantages of ducted splits is the concealed installation within the ceiling, preserving interior aesthetics. Their dual-function operation across all seasons, combined with their neat appearance, makes them a modern and efficient solution for today’s buildings.

Key Components and Operation of a Ducted Split System

Indoor Unit (Air Handler)

Installed in the false ceiling, it contains the evaporator, fan, fan motor, and air filters. It is responsible for cooling or heating air and distributing it through the ductwork.

Outdoor Unit (Condenser)

Installed in an open area, it includes the compressor, condenser coil, and other mechanical/electrical parts. This unit performs the main tasks of refrigerant compression and circulation.

Copper Piping and Thermal Insulation

Transfers refrigerant between indoor and outdoor units while maintaining energy efficiency.

Ductwork and Environmental Thermostat

Conditioned air is distributed through ducts to different rooms, while the thermostat ensures precise control of temperature and system operation.

Cooling and Heating Modes

•    Cooling Mode – The compressor pressurizes the refrigerant, heat is released through the condenser, and the refrigerant evaporates in the evaporator coil, producing cooled air distributed by the fan.
•    Heating Mode (in inverter or heat pump models) – The cycle is reversed, swapping the functions of the evaporator and condenser to provide heating.

Advantages and Applications of Ducted Split Systems

Ducted splits provide uniform air distribution and dual-mode cooling and heating, making them highly effective for both residential and office use. They are especially suitable for:
•    Multi-room apartments
•    Office buildings
•    Retail stores
•    Clinics and small healthcare centers

Key Benefits

•    Uniform coverage across all spaces
•    Concealed installation for a clean interior design
•    Independent zoning capability for each room
•    Reduced energy consumption with inverter models
•    Year-round performance in all climates
Because of their flexibility and efficiency, ducted split systems are ideal for spaces requiring both cooling and heating simultaneously.

Installation and Maintenance Guidelines

Installation Tips
•    Select an accessible location for the indoor unit to allow easy servicing.
•    Properly insulate ducts and copper piping to prevent energy loss.
•    Place the outdoor unit in a well-ventilated open area.

Regular Maintenance
•    Annual servicing, including coil and filter cleaning
•    Duct cleaning every 2–3 years
•    Performance check of fan and thermostat
•    Inspection of refrigerant pressure and charge level
Following these practices enhances system efficiency and extends equipment lifespan.

Comparing Ducted Splits with Other HVAC Systems

Ducted Split vs. Wall-Mounted Split Units

Ducted splits can cover multiple rooms with uniform airflow and limited zoning, making them preferable for larger, multi-room spaces. Wall-mounted splits, on the other hand, are more suitable for small, single-room areas. Energy consumption is moderate, with inverter ducted splits offering improved efficiency over older models.

Ducted Split vs. Chiller & Fan Coil Systems

Chiller/fan coil setups are designed for large-scale buildings requiring centralized cooling/heating. Ducted splits, however, offer simpler installation, lower initial costs, and effective multi-space coverage, with energy consumption comparable to chillers in inverter models.

Ducted Split vs. VRF Systems

VRF (Variable Refrigerant Flow) systems are the most advanced HVAC technology, offering precise zoning and highly optimized energy use. While ducted splits provide less zoning flexibility, they excel in delivering uniform airflow, compact installation, and lower upfront costs making them a cost-effective and practical choice for residential and mid-scale commercial projects.

Overall

Ducted splits combine aesthetics, seamless performance, user comfort, and relative energy savings, making them a smart and economical option for multi-room air conditioning needs.

Ducted Split Systems: A Smart and Cost-Effective Choice

With advanced technology, sleek design, and uniform performance, ducted split systems offer a durable and efficient solution for residential, office, and commercial buildings. Their dual cooling/heating capability, zoning options, energy efficiency, and concealed installation make them an intelligent choice.

To fully benefit from the advantages of Green ducted split systems and explore their models and capacities, consult the comprehensive Green HVAC catalog and refer to the installation guide to select the most suitable unit for your space and climate.