VRF Central Air Conditioning System

Description

Where it is the right choice: past roughly five or six spaces, multi-split strains in both pipework and management; at office floor, hotel, tower and mall scale VRF has no alternative left.

VRF (Variable Refrigerant Flow) is a central system in which dozens of indoor units connect to a single outdoor unit. The critical difference is this: the outdoor unit runs only as hard as the current total demand of the indoor units. If 12 of 40 offices are occupied, the system spends energy for 12 rooms.

Each space picks its own temperature independently. On heat recovery models one room can be cooled while another is heated at the same moment — a single system answers the different demands of a sunlit south façade and a shaded north façade on the same day. Instead of dozens of outdoor units on the walls, a few units sit on the roof.

Key Features

• Part-load efficiency: a system almost never runs at full load, and VRF holds its efficiency at part load
• Management from one point: every indoor unit is monitored centrally, working-hours scenarios are defined, empty floors are turned down automatically
• Simultaneous heating and cooling on heat recovery models
• Commissioning and expansion floor by floor — a scalable installation
• A clean façade: a few units on the roof instead of dozens on the walls

How to Choose

• The load calculation is essential: VRF is not a forgiving system. If the load calculation, pipe runs and indoor unit selection are not right from the start, comfort complaints get blamed on the system.
• Plan maintenance from the outset: if the filters of dozens of indoor units and the outdoor coil are not cleaned to a schedule, efficiency quietly melts away.
• Choose the indoor unit type per space: cassette, ducted and wall-mounted can be mixed on the same system.
• Combine it with energy management: add a central control layer and VRF stops being merely air conditioning and becomes the building’s energy management tool.

Get a free site survey and a quote for your project: (0501) 557 80 89 · bilgi@projenza.com