We commissioned a 42-indoor-unit Daikin VRV 5 system in a Canary Wharf office tower last quarter. Heat recovery model — meaning while the south-facing floors were in full cooling mode on a March afternoon, the north-facing offices were pulling heat from the same refrigerant circuit to warm up. One system, two jobs, and the total energy consumption was roughly 40% less than running separate heating and cooling systems. The facilities manager had come from a building with conventional boilers and chillers. He said he’d never go back.

VRV and VRF systems are the backbone of modern commercial climate control in London. If you’re heating and cooling a building with more than about 6-8 zones, a VRV/VRF system is almost certainly the most efficient and flexible solution available. We’ve been designing and installing them since before most of our competitors had even heard of variable refrigerant flow, and as a Daikin D1 Partner — the highest accreditation level Daikin offers — we’ve got access to technical support, training, and parts availability that isn’t available to standard installers.

VRV vs VRF — What’s the Difference?

Functionally, nothing. VRV (Variable Refrigerant Volume) is Daikin’s trademarked term for the technology they invented in 1982. VRF (Variable Refrigerant Flow) is the generic industry term used by everyone else — Mitsubishi Electric, Fujitsu, Samsung, LG, Toshiba. The underlying technology is the same: a large outdoor unit (or multiple units) connected to numerous indoor units via a shared refrigerant pipework network, with the system varying the flow of refrigerant to match the exact heating or cooling demand of each zone.

How VRV/VRF Works

Traditional AC systems are binary — the compressor is either on or off. A VRV/VRF system uses inverter-driven compressors that continuously adjust their speed to match demand. When only one room needs cooling, the compressor ticks along at 15-20% capacity. When every zone is demanding maximum output on a heatwave afternoon, it ramps up to full power. This modulation is what makes VRF systems so much more efficient than conventional equipment — the compressor isn’t cycling on and off all day, it’s running smoothly at exactly the output needed.

Our team is trained and experienced with Daikin and Mitsubishi Electric and other leading manufacturers. That means faster diagnosis, genuine parts, and repairs that last.

Heat Pump vs Heat Recovery

Two main variants:

• Heat pump (2-pipe) — the system operates in either heating OR cooling mode across all zones simultaneously. Simpler pipework, lower cost. Suitable where the whole building generally needs the same thing at the same time.
• Heat recovery (3-pipe) — the system can simultaneously heat some zones while cooling others. The heat extracted from cooling zones is transferred to zones that need heating, rather than being rejected to the outside air. This is the premium option and it’s where the real energy savings happen, particularly in buildings with mixed orientations where the south side needs cooling while the north side needs heating.

Indoor Unit Options

A single VRV/VRF outdoor unit can connect to a mix of different indoor unit types across the building:

• Ceiling cassettes — recessed into suspended ceilings. The most popular choice for offices. 4-way airflow distribution, compact panel, minimal visual impact.
• Ducted units — hidden above the ceiling with conditioned air distributed through ductwork to grilles. Completely invisible. Essential for premium office, hotel, and retail environments.
• Wall-mounted units — surface-mounted on the wall. Simple installation, good for individual rooms, meeting rooms, and server closets.
• Floor-standing units — sit at floor level, blow air upwards. Good for rooms with limited ceiling space or no ceiling void.
• Ceiling suspended — hang from the ceiling where there’s no void for a cassette. Common in retail and converted industrial spaces.

Why London Buildings Love VRV/VRF

London’s commercial building stock presents specific challenges that VRV/VRF systems handle exceptionally well:

Our vrv/vrf systems engineers cover all of London, from Central London to Canary Wharf and surrounding areas. Wherever your business is based, we can have an engineer with you promptly.

• Space constraints — one outdoor unit replaces 10-30 individual split system condensers. For buildings with limited roof space or restricted external wall area, this is often the deciding factor.
• Listed buildings and conservation areas — fewer external units means fewer planning issues. Combined with water-cooled options that eliminate external equipment entirely, VRF makes AC possible in buildings where it was previously refused.
• Tenant flexibility — in multi-tenanted buildings, individual zones can be metered separately. Tenants only pay for the energy they use. Zones can be reconfigured when floor plates are subdivided or merged.
• Part L compliance — the energy efficiency of modern VRF systems comfortably exceeds Building Regulations Part L requirements, simplifying the approval process for refurbishments and new builds.
• BMS integration — all major VRF manufacturers offer BACnet and Modbus integration for connection to building management systems. Centralised monitoring, scheduling, and energy reporting from a single interface.

Our VRV/VRF Capabilities

As a Daikin D1 Partner, we have:

• Direct access to Daikin’s UK technical support line and design team
• Priority parts supply and warranty processing
• Factory-trained engineers certified on VRV IV and VRV 5 platforms
• Access to Daikin’s VRV design software for pipework calculations and system configuration
• Extended warranty options beyond the standard manufacturer coverage

We also design and install VRF systems from Mitsubishi Electric (City Multi), Fujitsu (Airstage), Samsung (DVM), and other major manufacturers. The right system depends on the application — we’ll recommend the brand that best fits the building, the budget, and the performance requirements rather than pushing one manufacturer for everything.

Common faults we encounter during vrv/vrf systems work include VRV system error codes and Daikin U4 communication fault. Both are significantly cheaper to prevent than to repair after a full failure.

VRV/VRF Maintenance

VRF systems are relatively low-maintenance compared to chiller-based systems, but they’re not maintenance-free. The refrigerant circuit is more complex than a standard split system — longer pipe runs, more connections, more potential leak points. Regular leak checks, filter maintenance, and performance monitoring are essential. A VRF system with a slow refrigerant leak can run for months with gradually declining performance before the compressor eventually fails — and a VRF compressor is a very expensive component to replace.

We offer PPM contracts specifically designed for VRV/VRF systems, with manufacturer-trained engineers who understand the diagnostic tools and error code systems that these platforms use. Learn more about our PPM service.

Get a VRV/VRF Design and Quote

If you’re considering a VRV or VRF system for your building — or replacing an existing system that’s reached end of life — call 020 3974 1419 or request a site survey. We’ll assess the building, design the system, and give you a detailed quotation including equipment, installation, commissioning, and ongoing maintenance options.