Commercial ventilation, Wiltshire
Air handling units (AHU) in Wiltshire
AHU replacement, EC fan upgrades, controls and planned servicing, across Wiltshire.
- From £10,350 + VAT per unit
- Free survey
An air handling unit (AHU) is the central plant that filters, moves and often heats, cools or recovers heat from the air for a building's ventilation system. We replace ageing units, upgrade fans and controls, and service AHUs so they keep delivering their design airflows.
Across Wiltshire the job is priced the same way wherever you are: what is fitted, how long it takes and how far we travel. Towns we cover include Westbury, Swindon, Salisbury, Trowbridge and Chippenham.
Air handling units in Wiltshire at a glance
- Area
- Wiltshire
- Towns listed
- 14, largest Swindon
- Postcode districts
- SN1, SN4, SP4, SN1, SN2 and SP1
- Price region
- South West
- Survey
- Free survey (UK mainland)
What the work involves
Many AHUs in older offices, schools and retail units run on belt-driven fans, clogged filters and controls nobody understands. Replacing the fan section with EC fans, or the whole unit with a modern heat recovery AHU, can cut running costs and noise while restoring airflow. New units must meet current ecodesign rules for fan efficiency and heat recovery.
EC fan retrofit
Belt-driven fans replaced with direct-drive EC fans.
Controls upgrade
New controls, sensors and BMS integration.
Planned servicing
Filters, belts, coils, drains and controls on a schedule.
Guide prices in Wiltshire
| Work | Guide price |
|---|---|
| Air handling unit replacement, small to medium unit, like-for-like position (per unit) | £10,350–£36,350 + VAT |
| Air handling unit service: filters, belts or EC fan check, coils, controls (per unit per visit) | £205–£410 + VAT |
These ranges use our South West rates. Prices exclude VAT. You get a fixed written price before any work is booked.
Signs it is time to call us
- Noisy plant rooms or rooftop units
- Filters that are never changed
- Corroded casings or leaking drain trays
Rules in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. Employers have a separate duty under the Workplace Regulations 1992 to provide effective and suitable ventilation.
How the job runs
- Survey
- Options
- Plan
- Install
- Commission
Towns we cover in Wiltshire
- Swindon
- Salisbury
- Trowbridge
- Chippenham
- Melksham
- Warminster
- Calne
- Westbury
- Devizes
- Neston (Wiltshire)
- Corsham
- Tidworth
- Royal Wootton Bassett
- Amesbury
Questions about air handling units (AHU) in Wiltshire
Is the survey free in Wiltshire?
For new installations on the UK mainland, yes. The survey is free and the quote that follows is fixed and in writing. Servicing, testing and repair visits are charged, and we confirm the cost before booking.
What does an AHU service cost?
A service visit typically costs £195 to £395 per unit excluding VAT, depending on size and access.
Do you work on rooftop units?
Yes, with safe access arranged for roof work.
Which rules apply to ventilation in Wiltshire?
In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.
Which towns in Wiltshire do you cover?
All of Wiltshire, including Westbury, Swindon, Salisbury, Trowbridge and Chippenham. If your town is not listed, send the postcode and we will confirm.
Other services in Wiltshire
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