What commercial air conditioning costs
Commercial air conditioning is genuinely bespoke, so prices span a very wide range — broadly from around £3,500 for a small premises to £70,000+ for a larger building, and into the hundreds of thousands for large multi-floor projects. A VRF system commonly runs £10,000–£75,000 depending on size and complexity. The only route to a real figure is a site survey.
Budgeting ballparks, not quotes
These are broad 2026 ranges; commercial pricing is project-specific and moves with the market. Get a proper survey and quotation. (Researched June 2026.)
Indicative ranges (2026)
| Scenario | Indicative cost |
|---|---|
| Small premises (café, salon, small shop) | from ~£3,500 |
| Multi-split, a few small offices | ~£5,000–£8,000 |
| Open-plan office (several ducted or cassette units) | ~£8,000–£20,000 |
| VRF / VRV system | ~£10,000–£75,000 |
| Large, multi-floor building | up to £350,000+ |
Excluding VAT. Real projects vary enormously — treat these as budgeting ballparks.
What drives commercial cost
- Load and system choice — the heat-load and whether it’s split, VRF, chilled-water or packaged plant.
- Building and access — pipe routes, ceilings, roof access, lifting and out-of-hours working all add cost.
- Indoor unit count and type — more zones, and concealed or cassette units, cost more than basic wall units.
- Controls — zoning and BMS integration adds capability and cost.
- Heat recovery — heat-recovery VRF costs more than heat-pump-only, but can pay back in buildings with mixed loads.
Ongoing costs: maintenance and compliance
Budget for planned preventative maintenance (PPM) from the outset — typically in the region of £180–£600 per unit per year for a compliance contract, or roughly £500–£1,500 a year for a whole system, depending on size and complexity. This usually covers the servicing needed for warranties and includes the legally required F-gas leak checks. Don’t forget the periodic TM44 inspection for systems over 12 kW. Repairs, if needed, range from minor (£100–£500) to major (a compressor replacement can run into the thousands).
Think whole-life, not day one: the cheapest system to install is rarely the cheapest to own. A well-designed, efficient, correctly-sized system costs more upfront but less to run and maintain across its life — which is the right way to weigh the business case.
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