Ductless Heating and Cooling Systems

Ductless High Wall Unit

What is a high wall unit? 

A high wall unit is the most common type of indoor ductless mini split system, mounted high on a wall to circulate conditioned air efficiently across a room using natural airflow patterns.

Why choose a high wall unit? 

As the name suggests, wall air conditioners sit on the upper portion of the wall, close to the ceiling. This elevated position allows them to take advantage of physics—hot air rises and cold air sinks—to distribute air effectively. Designed to be unobtrusive, high wall units are compact and blend seamlessly with modern decor.

They typically feature adjustable louvers or vanes, giving you total control over whether airflow is directed horizontally or vertically. Like other ductless heating and cooling systems, high wall units optimize energy usage by allowing you to condition only the occupied rooms, ensuring efficiency that pays for itself over time.

Underceiling Ductless Unit

What is an underceiling unit? 

An underceiling ductless unit is a high-capacity air handler mounted directly below the ceiling surface, making it ideal for large rooms that lack a drop ceiling.

Why choose an underceiling unit? 

Similar to a cassette but not recessed, this unit is great for spaces where ceiling depth is limited. Underceiling units are powerful, offering higher BTU capacities than standard wall-mounted options, allowing them to handle significant heating and cooling loads while maintaining excellent energy efficiency.

Because they are ceiling-mounted, they free up valuable wall and floor space. This makes them a smart choice for open floor plans or rooms where preserving aesthetics and wall space is a priority.

Ductless Cassette Unit

What is a ductless cassette? 

A ductless cassette unit is a sleek, recessed air handler installed flush within a suspended ceiling, where only the grille is visible, offering a discreet and streamlined look.

Why choose a cassette unit? 

These units are designed for homeowners who prioritize aesthetics. The bulk of the mechanical system is hidden within the ceiling, leaving only the air-distributing grille exposed. They are particularly effective in larger rooms or open spaces where a wall-mounted unit might struggle to provide adequate coverage or would disrupt the interior design.

Ducted Ductless Unit

What is a ducted ductless unit? 

A ducted ductless unit is a hybrid solution that connects an outdoor mini split condenser to a hidden indoor air handler, using short runs of ductwork to condition multiple rooms or zones invisibly.

Why choose a ducted unit? 

This system bridges the gap between traditional central air and ductless HVAC technology. The indoor air handler is usually tucked away in an attic, closet, or ceiling, with short ducts delivering air to different rooms. This setup offers the clean look of central air without the energy loss associated with extensive, older ductwork.

Leveraging variable-speed compressors and inverter technology, these units are highly efficient. They are the ideal solution for homes without existing ductwork that still want to serve multiple rooms from a single, hidden system.

Ductless Floor Console Unit

What is a floor console unit? 

A ductless floor console unit is an indoor air handler installed at or near floor level, functioning similarly to a traditional radiator but with the advanced efficiency of a mini split system.

Why choose a floor console? 

These units are perfect for spaces with limited wall space, such as attics with slanted ceilings or rooms with expansive windows. With vents at both the top and bottom, they ensure even air distribution and comfort in areas where high-wall units aren't feasible.

Choosing From the Types of Ductless Heating and Cooling Systems

Clint Newsome, owner of Albany Air Conditioning and Heating Co. in Albany, GA says selecting the right indoor mini split unit largely depends on the room layout, installation requirements, and the homeowner’s preferred appearance.

“It really depends on the layout of the room,” Newsome said. “Most experienced HVAC contractors can successfully install a variety of ductless system types. In many cases, the decision comes down to what the homeowner wants aesthetically and what works best for the space.”

Newsome added that new construction projects often provide greater flexibility when choosing indoor unit styles.

“If it’s a new construction project and the homeowner plans to use ductless from the start, we often recommend a ceiling cassette model,” he said. “A ceiling cassette is designed to resemble a standard ceiling register, so it blends into the space without having equipment mounted on the walls. Ultimately, the right option depends on the overall look and feel the homeowner wants to achieve.”

To ensure you get the most efficient and comfortable system for your specific needs, schedule an appointment with your local Carrier expert. They can assess your home and recommend the perfect configuration.