VRF systems is a all-electric technology consists of a single outdoor condensing unit, multiple indoor units serving various zones, refrigerant piping with branch selectors, and associated controls.

Major Components:

1. VRF Outdoor Unit 
2. VRF Indoor Unit
3. Refrigerant Pipelines
4. Control Cable
5. Ductwork (if applicable)

VRF systems Major advantages:

• Good zoning control
• Individual temperature control
• Minimized ductwork,
• Excluding the need for secondary fluids (chilled-water)
• Uses R-410A refrigerant (Environmental Friendlier Choice)
• Very high energy efficiency ratio (EER) of 15 to 20
• Integrated energy efficiency ratio (IEER) of 17 to 25.
• They are 20% to 30% more efficient than conventional HVAC systems due to partial load operation, speed modulation, zoning capabilities, and heat-recovery technology.

VRF systems Disadvantages:

• The need for a dedicated ventilation system to deliver the outside air to various zones
• Long refrigerant lines and a large number of branch connections could result in refrigerant leakage
• The need for condensate drain lines for each VRF indoor unit
• Compliance with maximum allowable refrigerant quantities within a given volume.