VRF Systems consist of two main parts: indoor and outdoor panels. Familiarity with each of these parts and their applications leads to economical, beautiful, and flawless VRF system designs.

Indoor VRF Panels
Indoor panels are installed inside the space and connected to outdoor panels via copper pipes. They perform various roles in the cooling and heating cycle. In cooling mode, indoor panels act as evaporators, absorbing heat from the indoor space through the panel and internal fans when refrigerant gas arrives from the compressor, transferring cooling to the space. In heating mode, indoor panels act as condensers, transferring heat to the indoor space via the panel and fans as refrigerant gas arrives.

• Wall-Mounted Indoor Panel
  Wall-mounted panels are the most familiar indoor panel type due to their use in split air conditioners. Installed on walls, they are common in homes, shops, offices, and many other environments. These panels have small heating coils and are usually offered in low heat capacities by various manufacturers. Installation is simple, and maintenance is easy due to accessibility. Wall panels support both wired (wall-mounted) and wireless (remote) controls. However, in public places where users shouldn’t access indoor panels, their availability is a disadvantage.

• Cassette Indoor Panel
  Four-way cassette panels are square-shaped, consisting of a main body and decorative panels installed on the ceiling. They allow fresh air supply. Cassette panels operate quietly, usually below the hearing threshold. They are among the most expensive indoor panels due to their elegant design and minimal interference with architectural plans. Cassette panels support both wired and wireless remotes. One-way and two-way cassette panels are other types. Installation is relatively more complex.

• Ducted Ceiling Indoor Panels
  Similar to ducted split units, these panels come in three types: low static pressure, middle static pressure, and high static pressure. High-pressure panels have greater airflow power, allowing longer duct runs. Low-pressure panels cannot support ducting due to inability to overcome pressure drops, whereas middle and high-pressure panels can be ducted. These are the only indoor panels that can connect to hot water coils — heat exchangers with hot water flowing inside that heat air passing over the pipes.

Outdoor VRF Units
Designed for diverse applications and locations, all outdoor VRF panels use heat pump technology, which transfers heat between environments. Heat pumps provide pressure and flow for heating and cooling cycles.

• Mini VRF Outdoor Unit
  Usually side-fan type, offered in capacities ranging from 40,000 BTU up. Manufacturers produce models with 40,000, 50,000, and 60,000 BTU, available in single and three-phase versions. The highest Mini VRF capacity is 140,000 BTU; models above 80,000 BTU are usually three-phase. These units are commonly used in small residential and office settings. Single-phase power facilitates easier use in such units. They can be installed on balconies, reducing pipe length in residences. Small outdoor panels are standalone and not modular.

• VRF Outdoor Unit
  VRF outdoor units feature blower fans and high capacities from 80,000 to 300,000 BTU from various brands. They use three-phase power and can be modularly connected. For example, to achieve 440,000 BTU, you can modularly connect a 300,000 BTU and a 140,000 BTU panel. This modularity lets users optimize capacity based on needs and operate flexibly.