A property manager in Fitzrovia rang us about a 6-storey office building where the tenants on the top two floors had been complaining about heat since the day they moved in. The building had AC on floors 1-4 but the developer had run out of budget before getting to 5 and 6. The existing system was a Mitsubishi Electric City Multi from 2014 — decent kit, but undersized for the solar gain on those top floors, and the outdoor units on the roof were already running close to capacity.

We couldn’t just bolt more indoor units onto the existing system without overloading it. So we designed a separate Daikin VRV IV heat recovery system for floors 5 and 6 — eight ceiling cassettes, one outdoor unit, with the pipework running up an existing riser that the original installer had conveniently left empty. Two weeks of installation work, all done outside office hours to avoid disruption. The tenants went from portable fans and open windows to 22°C comfort in every room.

That’s a fairly typical commercial AC installation for us. Every building has constraints — structural limitations, planning restrictions, electrical capacity, access issues, budget. The design work matters as much as the installation itself.

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

What We Install

We design and install air conditioning systems for offices, restaurants, hotels, retail units, schools, healthcare facilities, server rooms, and residential properties across London. The equipment ranges from single wall-mounted splits to 100+ unit VRV/VRF systems across multi-storey commercial buildings.

System Types

• Split systems — wall-mounted, ceiling cassette, ducted, and floor-standing. One outdoor unit, one indoor unit. The workhorse of commercial AC. Ideal for individual rooms, server closets, and small retail units.
• Multi-split systems — one outdoor unit serving 2-5 indoor units. Good for small offices and restaurants where you need independent zone control without the cost of a full VRF system.
• VRV/VRF systems — one or more outdoor units serving up to 64 indoor units via a shared refrigerant circuit. The go-to solution for large commercial buildings. Heat recovery models can simultaneously heat and cool different zones. We’re a Daikin D1 Partner — the highest level of Daikin accreditation.
• Water-cooled systems — for buildings where external condensing units aren’t permitted (Grade II listed buildings, conservation areas, landlord restrictions). We design bespoke water-cooled solutions with heat rejection via internal plant rooms or roof-mounted dry coolers hidden behind parapets.
• Rooftop packaged units — Carrier, Daikin, and Trane units for retail, restaurant, and warehouse applications where all equipment needs to be on the roof.
• Close control / precision cooling — server rooms, data centres, and comms rooms requiring tight temperature and humidity control.

Brands We Install

We’re not tied to one manufacturer. We specify the right equipment for the application:

Our commercial ac installation 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.

• Daikin — our primary VRV/VRF partner. D1 accredited. VRV IV and VRV 5 heat recovery and heat pump systems, Sky Air commercial splits, and the full residential range.
• Mitsubishi Electric — City Multi VRF, Mr Slim commercial splits, ceiling cassettes. Excellent reliability record.
• Fujitsu — ARSTG and ASYG ranges. Strong performer in the mid-market commercial sector.
• Samsung — Wind-Free cassettes, DVM S VRF. Growing presence in the London commercial market.
• Panasonic — Etherea and PACi ranges. Good value for residential and light commercial.
• Carrier — rooftop units, chillers, AHUs for larger commercial projects.

The Installation Process

Every commercial installation follows the same process, whether it’s a single split for a shop or a 50-unit VRF for an office tower:

1. Site survey — we assess the space, measure heat loads, check electrical supply capacity, identify pipework routes, and note any access constraints. This is free and takes 1-3 hours depending on the site.
2. System design — heat load calculations per room/zone, equipment selection, pipework design, electrical requirements, condensate routing, and control strategy. For VRF systems, we use the manufacturer’s design software to verify pipe lengths, elevation differences, and branch configurations.
3. Quotation — itemised breakdown of equipment, materials, labour, and any ancillary work (electrical upgrades, builders work, crane hire, etc.). No hidden costs.
4. Planning and access coordination — for commercial sites, this often involves coordination with building managers, other trades, landlords, and occasionally local authority planning departments.
5. Installation — our own directly employed engineers, not subcontractors. We work to agreed timelines and clean up after ourselves.
6. Commissioning — every system is commissioned to manufacturer specifications. We measure airflow, check refrigerant charge, verify control operation, and test every mode of operation. You get a commissioning certificate.
7. Handover — we walk you through the controls, explain the maintenance requirements, and set you up with user manuals. For commercial clients, we typically recommend a PPM contract to protect the investment.

Planning Permission and Listed Buildings

Most commercial AC installations in London don’t require planning permission — the equipment falls under permitted development rights. However, there are exceptions:

Common faults we encounter during commercial ac installation work include AC systems not cooling and multi-split indoor units not working. Both are significantly cheaper to prevent than to repair after a full failure.

• Listed buildings — any external equipment on a listed building needs listed building consent. We’ve completed installations on Grade I and Grade II listed buildings in Westminster, the City, and Mayfair using water-cooled systems that require no external equipment.
• Conservation areas — external condensers visible from the street may require planning approval. We design concealed installations with equipment hidden on flat roofs, in courtyards, or in basement plant rooms.
• Noise — outdoor units close to residential boundaries must comply with BS4142 noise standards. We specify low-noise equipment and acoustic enclosures where necessary.

We handle the planning process for you where required, including preparation of noise assessments and heritage impact statements.

Get a Quote

Whether you need a single split system for a shop or a full VRF installation for a multi-storey office, the starting point is a site survey. Call 020 3974 1419 or request a callback. We’ll assess your space, design the right system, and give you a fixed-price quotation with no obligation.