VRF / VRV Air Conditioning Systems: How They Work, When They Make Sense and What They Cost
VRF — or VRV if it is a Daikin — is the technology behind most new commercial air conditioning in the UK: one outdoor condenser feeding dozens of indoor units through a refrigerant network, with an inverter-driven compressor giving each room exactly the cooling or heating it needs. Here is how it differs from multi-split, heat-pump versus heat-recovery, typical project sizes, the 2026 cost per kW and the upkeep it needs. We match you with vetted, F-Gas certified commercial installers.
Daikin VRV versus generic VRF
Daikin invented the concept in 1982 and trademarked VRV (Variable Refrigerant Volume); everyone else calls the same thing VRF — Mitsubishi Electric City Multi, Toshiba SMMS, Fujitsu Airstage, Panasonic ECOi, Hitachi Set Free, LG Multi V, Samsung DVM. Daikin and Mitsubishi Electric are the premium tier with the longest warranties through accredited installers; Toshiba, Fujitsu, Panasonic and Hitachi are strong mid-range; LG and Samsung compete on price. The principle is identical — what differs is control logic, indoor-unit range and warranty terms (see our F-Gas and accreditation guide).
Heat-pump VRF versus heat-recovery VRF
The first design decision. Heat-pump (two-pipe) systems switch the whole circuit between heating and cooling; heat-recovery systems run both at once and recycle rejected heat, which suits buildings with mixed orientations or IT heat gains.
| Factor | Heat-pump VRF | Heat-recovery VRF |
|---|---|---|
| Modes | All indoor units heat or all cool at a given time | Each unit or zone heats or cools independently |
| Pipework | Two pipes | Three pipes or branch-selector boxes — more installation work |
| Best for | Open-plan offices, retail, single-aspect buildings | Mixed-use buildings, glazed façades, IT heat gains |
| Installed cost | Lower end of £350–£600 per kW | Upper end of £350–£600 per kW |
When VRF beats multi-split — and when it does not
Multi-split is the right answer for many small premises; VRF earns its premium when scale, zoning or pipe lengths leave multi-split short. To put numbers on it: a multi-split is generally limited to around 30 metres of pipe per branch and a handful of indoor units, whereas a single VRF condenser can run a pipe network of several hundred metres in total and sit up to roughly 90 metres in height away from its indoor units — which is what lets one plant deck serve a whole multi-storey building.
| Situation | Multi-split | VRF / VRV |
|---|---|---|
| Up to 4–5 rooms, one floor | Usually better value — see our shop and office guides | Over-specified unless expansion is planned |
| 6–60+ indoor units across floors, long pipe runs | Several outdoor units; pipe-length limits bite | One or two condensers, long multi-branch pipework, central control |
| Simultaneous heating and cooling | Not possible on one circuit | Heat-recovery VRF does it and saves energy doing so |
| Server room plus offices | Dedicated split for the server room | Usually still a separate system — see the server room guide |
Typical VRF project sizes and 2026 costs
VRF is priced per kW of cooling capacity. The figures apply the £350–£600 per kW baseline to common project sizes; the £150–£300/m² office figure is a useful cross-check.
| Project | Capacity | Indoor units | Installed cost (2026) |
|---|---|---|---|
| Small office or clinic, one floor | 20–30 kW | 6–10 | £7,000–£18,000 |
| Medium office, restaurant or gym | 40–60 kW | 10–20 | £14,000–£36,000 |
| Multi-floor office, hotel wing, school block | 80–120 kW | 20–40 | £28,000–£72,000 |
Capacity × £350–£600 per kW; excludes structural work, crane hire and supply upgrades. Restaurants and gyms carry higher loads per m² — see our restaurant and gym guides.
Maintaining a VRF system
VRF carries a large refrigerant charge, so maintenance is partly a legal matter: the F-Gas regulations require logged leak checks — annually for most systems, more often for the largest — and buildings above 12 kW combined output need a TM44 inspection every five years. A planned maintenance contract covers filters, coils, drains, fans, controls and compressor performance, usually quarterly or six-monthly, at £75–£150 per unit per visit; see our guide to commercial maintenance contracts.
Refrigerant choice is shifting too. Older VRF ran on R410A, which the F-Gas phase-down is making scarce and expensive — roughly £12–£18 per kg in 2026 and climbing — so a large leak on a legacy system is now a serious bill rather than a nuisance. New VRF is moving to lower-GWP gases: R32 on smaller systems and R454B across many larger ranges. It doesn't change how you run the system day to day, but it's worth asking any installer which refrigerant a new system uses, because it affects future top-up costs and how long the range will be supported with spares.
Sources & methodology
- Cost bands (£350–£600 per kW; office fit-outs £150–£300/m²) from the 2026 baselines in our commercial cost guide.
FAQs
Get VRF quotes from accredited installers
Tell us the building type, floor area and number of rooms, and we match you with vetted, F-Gas certified commercial engineers who quote VRF or multi-split as appropriate. Free, no obligation.