Commercial ventilation, Dyfed
Air handling units (AHU) in Dyfed
AHU replacement, EC fan upgrades, controls and planned servicing, across Dyfed.
- From £9,450 + 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.
Every job in Dyfed gets a written quote before it starts and a commissioning record when it finishes. We cover Haverfordwest, Milford Haven, Llanelli, Ammanford and Aberystwyth and the villages around them.
Air handling units in Dyfed at a glance
- Area
- Dyfed, Wales
- Towns listed
- 6, largest Llanelli
- Postcode districts
- SY24, SA31, SA33, SA61, SA62 and SA71
- Price region
- Wales
- Survey
- Free survey (UK mainland)
What the work involves
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. Replacements often involve crane lifts, roof work and out-of-hours changeovers.
Controls upgrade
New controls, sensors and BMS integration.
Planned servicing
Filters, belts, coils, drains and controls on a schedule.
Like-for-like replacement
New unit in the same position, connected to existing ductwork.
Guide prices in Dyfed
| Work | Guide price |
|---|---|
| Air handling unit replacement, small to medium unit, like-for-like position (per unit) | £9,450–£33,200 + VAT |
| Air handling unit service: filters, belts or EC fan check, coils, controls (per unit per visit) | £185–£375 + VAT |
These ranges use our Wales rates. Prices exclude VAT. You get a fixed written price before any work is booked.
When to get it looked at
- Rising energy bills from old plant
- Frequent belt or fan failures
- Noisy plant rooms or rooftop units
Rules in Wales
Wales has its own Part F ventilation guidance, published by the Welsh Government, and work is checked by building control. Employers in Wales also have the Workplace Regulations 1992 duty to ventilate enclosed workplaces.
How the job runs
- Survey
- Options
- Plan
- Install
- Commission
Towns we cover in Dyfed
Questions about air handling units (AHU) in Dyfed
Is the survey free in Dyfed?
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.
How much does an AHU replacement cost?
A small to medium AHU replacement in the same position typically costs £9,950 to £34,950 excluding VAT, depending on size, heat recovery and lifting.
How often should an AHU be serviced?
Most AHUs need servicing at least twice a year, with filters changed more often in dirty environments. SFG20 schedules are commonly used to set frequencies.
Which rules apply to ventilation in Dyfed?
In Wales, the Welsh Government's own Approved Document F (2022 edition) applies to ventilation in homes, with a new edition taking effect on 4 March 2027. Rented homes must be fit for human habitation under the Renting Homes (Wales) Act 2016, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.
Which towns in Dyfed do you cover?
All of Dyfed, including Haverfordwest, Milford Haven, Llanelli, Ammanford and Aberystwyth. If your town is not listed, send the postcode and we will confirm.
Other services in Dyfed
Get a guide price in two minutes
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.