VRV vs VRF: what is the difference?

Why there are two names for one technology

If you have two quotes in front of you, one saying VRV and one saying VRF, you are almost certainly comparing the same type of system. Daikin states that VRV is its trademark and that other manufacturers therefore use the term VRF for comparable systems, and it describes the technology as variable refrigerant volume control, introduced in 1982.

So VRV is a brand name that became shorthand, in the way some people say hoover for any vacuum cleaner. Treat the two words as interchangeable when you are searching and reading, and as a manufacturer's product line when you are buying.

How a VRF / VRV system works

A VRF system has one or more outdoor units, normally with variable-speed compressors, connected by refrigerant pipework to a number of indoor units. Each indoor unit takes only the refrigerant it needs to meet its own zone, so the outdoor unit speeds up and slows down with the total demand instead of switching on and off. That is where the name comes from: the volume or flow of refrigerant varies.

The indoor units can be ceiling cassettes, ducted units, wall units or floor units, so one outdoor unit can serve a mix of rooms with different uses. The trade-off against a chiller is that the refrigerant itself runs through the building, which is why refrigerant choice and room volume matter. Our VRF vs chiller guide covers when each wins.

The differences that do matter

Heat pump or heat recovery. A heat pump configuration moves the whole system between heating and cooling. A heat recovery configuration uses additional pipework and branch controllers so that, for example, a south-facing office can be cooled while an internal meeting room is heated, moving heat between zones instead of rejecting it outside. It costs more to install and suits buildings with simultaneous heating and cooling demand.

Refrigerant. Older systems run on R410A, newer ones on lower global-warming-potential refrigerants such as R32 and R454B. This affects future servicing and the room-volume checks required under BS EN 378. See R32 vs R454B for commercial AC replacement.

Pipe lengths and heights. Every product line has limits on total pipe length and on the height difference between outdoor and indoor units. A quote that does not state the limits it was designed to is incomplete.

Indoor unit mix and controls. Cassette, ducted and wall units differ in noise, appearance and airflow, and the controller decides whether tenants or a building management system run the zones.

What to check when you compare quotes

Ask each supplier to state the outdoor unit model series, total installed capacity in kW, the refrigerant and charge, heat pump or heat recovery, indoor unit schedule, and who commissions and services it. A quote that names a brand but not a model series cannot be compared with one that does. For budgeting, use the sourced commercial HVAC cost ladder, and for the system overview see VRF / VRV air conditioning.

Sources and last checked

Checked on 18 October 2026. Regulations and guidance are revised, so confirm the current edition before you rely on it.

• Daikin Europe: variable refrigerant volume (VRV is a Daikin trademark; introduced 1982)