Commercial HVAC Cost Guide — Honest UK Price Ranges 2026

“How much does commercial HVAC cost?” is the question every facilities manager needs answered before a board conversation, and the one most supplier websites dodge with “it depends on your requirements.” It does depend — but that is not an excuse to give no numbers. This guide sets out honest UK price ranges by system type, explains what actually moves the price, and covers the funding that turns a large capital figure into a manageable one. It is the numbers-led starting point for planning any commercial HVAC investment.

Key takeaway upfront

There is no single price for commercial HVAC because it is not one thing — VRF, chillers, air handling units, ventilation and heat pumps serve different duties at different scales. What every honest quote shares is that the price is driven by the building’s real heating and cooling load, the number of zones and units, plant-room and access constraints, refrigerant choice and any electrical supply upgrade — never by floor area alone. Any firm figure should come from a survey and a model of your real consumption, not a rule of thumb.

In this guide

• Indicative cost ranges by system
• VRF and VRV cost
• Chiller cost
• Air handling unit cost
• Ventilation and MVHR cost
• Commercial heat-pump cost
• Maintenance and PPM cost
• What actually drives the price
• Refurbish versus replace — the honest saving
• Funding that offsets the capital
• Frequently asked questions

Indicative cost ranges by system {#ranges}

These are indicative UK ranges for fully installed systems. They are wide because they span everything from a single office floor to a hospital campus — your figure lands within a range once the load and building are known.

System	Typical capacity	Indicative installed cost
VRF / VRV air conditioning	22–150 kW cooling	£20,000–£250,000
Central chiller / chilled water	100 kW–2 MW+ cooling	£80,000–£1,500,000+
Air handling units (AHUs)	fan 1–50 kW; 0.5–20 m³/s	£15,000–£400,000
Ventilation / MVHR	fan 0.5–20 kW	£8,000–£200,000
Commercial heat-pump heating	40–500 kW thermal	£60,000–£600,000
Maintenance / PPM	across installed plant	£1,500–£40,000 per year

Treat these as planning figures. The rest of this guide explains where within each range a given building sits, and why.

VRF and VRV cost {#vrf-cost}

VRF/VRV typically runs £20,000–£250,000. A single office floor with a handful of ceiling cassettes sits near the bottom; a multi-floor building with dozens of indoor units and heat-recovery (three-pipe) VRF sits near the top. The cost drivers are the number of indoor units, whether you specify heat recovery (which adds pipework and cost but recovers heat between zones), the condenser plant-deck works, and the controls or BMS integration. Our VRF and VRV air conditioning page covers the specification in detail, and the VRF versus chiller comparison helps decide whether VRF is the right medium at all.

Chiller cost {#chiller-cost}

Central chillers span £80,000 to £1.5m and well beyond, because the band covers everything from a 150 kW air-cooled unit to a multi-megawatt water-cooled installation for a hospital or data campus. The chiller itself is only part of the cost: pumps, headers, chilled-water pipework, buffer vessels and — for water-cooled systems — cooling towers with their L8 water-hygiene duties all add up. Free-cooling capability adds cost up front but cuts running cost hard on part-load. See commercial chillers and chilled-water systems for the plant-room detail.

Air handling unit cost {#ahu-cost}

AHUs run £15,000–£400,000. A single packaged unit for a modest space sits low; a large built-up AHU with thermal-wheel heat recovery, high-efficiency EC fans and F7/ePM filtration for a hospital or lab sits high. Ductwork, craneage and plant-room works add to the unit cost. Critically, an ageing AHU is often a refurbishment candidate rather than a replacement — see the refurbish-versus-replace section below and our air handling units and ductwork page.

Ventilation and MVHR cost {#ventilation-cost}

Ventilation and MVHR run £8,000–£200,000 depending on the airflow, the extent of ductwork and whether demand control (CO2 or occupancy sensing) is included. MVHR carries a higher unit cost than simple supply-and-extract but recovers up to around 90% of the heat in exhaust air, which pays back in reduced heating and cooling load — and it is what makes low-temperature heating from a heat pump viable. Our commercial ventilation and MVHR page sets out the indoor-air-quality-and-energy trade-off.

Commercial heat-pump cost {#heat-pump-cost}

Commercial heat-pump heating runs £60,000–£600,000. The heat pumps themselves are only part of it: emitter upgrades (to allow a low, efficient flow temperature), buffer vessels, controls and — often the biggest single variable — any DNO electrical supply upgrade. A supply upgrade can be the longest-lead and most expensive item, which is why it should be checked at feasibility. The heat pump versus gas boiler comparison and our commercial heat pumps page cover the running-cost side that offsets the capital.

Maintenance and PPM cost {#ppm-cost}

A planned maintenance contract typically runs £1,500–£40,000 per year, depending on the plant and the leak-check frequency it must satisfy. This is not an optional extra: it discharges your statutory F-Gas leak-check duty, protects manufacturer warranties and holds efficiency. Our planned versus reactive maintenance guide sets out why the contract usually costs less than the reactive call-outs it replaces.

What actually drives the price {#drivers}

Six factors move the figure more than anything else:

• Heating and cooling load. Cost tracks capacity, and capacity is set by the building’s real heat gains and losses — solar, occupancy, IT and process heat — not floor area.
• Number of zones and units. More indoor units, more control, more pipework and labour.
• Plant-room and access constraints. Craneage, restricted plant rooms and out-of-hours working in an occupied building all add cost.
• Refrigerant choice. Low-GWP plant future-proofs against the F-Gas phase-down but can carry different equipment and, for flammable naturals, siting cost.
• Electrical supply. Electrified cooling and heat pumps add load; a DNO upgrade is often the single biggest swing factor.
• Controls and BMS integration. Good controls cost more up front and pay back in running cost, because a building spends most of its hours below peak.

Callout — why “cost per square metre” misleads. Two buildings of identical floor area can differ by a factor of three in HVAC cost, because one is a lightly-loaded office and the other a heat-dense data suite. Always size on load, not area.

Refurbish versus replace — the honest saving {#refurbish}

The genuine cost-saving angle most suppliers skip: an ageing AHU or chiller is frequently a refurbishment candidate, not a replacement. Retrofitting EC (electronically commutated) fans, replacing tired coils, adding or improving heat recovery and upgrading filtration can cut fan energy substantially and lift indoor air quality for a fraction of the cost — and disruption — of a full replacement. Replacement is the honest answer only where the casing is corroded, the layout is wrong, or the duty has changed. The right service is a whole-life-cost comparison of each option from a proper survey, not a default rip-out.

Funding that offsets the capital {#funding}

The headline capital figure is not the whole story, because commercial HVAC is funded through the tax system. There is no commercial equivalent of the domestic £7,500 Boiler Upgrade Scheme — that is residential only. Instead, full expensing gives companies a 100% first-year deduction on qualifying new plant (made permanent from April 2026), the £1m Annual Investment Allowance covers other businesses, and a new 40% first-year allowance applies from 1 January 2026. Confirm current rates on gov.uk. Our grants and funding page and the guide on how to fund a commercial HVAC upgrade map the routes that genuinely apply.

For a figure specific to your building, request a free desk feasibility — we model the full installed cost, and the whole-life running cost, from a survey before you commit, and can stage the work where a single capital hit is not affordable.

Frequently asked questions {#faqs}

How much does commercial air conditioning cost per square metre?

Cost per square metre is a poor guide, because HVAC cost tracks load, not floor area. A lightly-loaded office and a heat-dense data suite of the same size can differ threefold. As indicative system ranges: VRF £20,000–£250,000, chillers £80,000–£1.5m+, AHUs £15,000–£400,000. A reliable figure for your building comes from sizing on its real heat gains and modelling from consumption data, not applying a rate per square metre.

Is it cheaper to refurbish or replace an old air handling unit?

Frequently to refurbish. Retrofitting EC fans, replacing coils, adding heat recovery and upgrading filtration can cut fan energy substantially and improve indoor air quality for a fraction of a full replacement’s cost and disruption. Replacement is the honest answer only where the casing is corroded, the layout is wrong or the building’s duty has changed. The right approach is a whole-life-cost comparison of both options from a survey, not a default replacement.

Are there grants to reduce commercial HVAC cost?

There is no commercial equivalent of the £7,500 Boiler Upgrade Scheme; that is domestic only. Commercial HVAC is funded through the tax system: full expensing (100% first-year deduction for companies, permanent from April 2026), the £1m Annual Investment Allowance, and a new 40% first-year allowance from 1 January 2026. Eligible energy-intensive industrial sites could historically use the Industrial Energy Transformation Fund, though its windows are winding down. Confirm current status on gov.uk.

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Authoritative references: the government’s capital allowances and full expensing guidance and CIBSE for commercial HVAC design and sizing.