Air handling units in St Helens
Clear prices and written reports for air handling unit servicing and repairs in St Helens.
- Visit price agreed before we book
- Written report after every visit
- F-gas records updated where required
How much does an air handling unit service cost in St Helens?
In St Helens, expect around £240–£585 per unit, per visit, plus VAT. A typical job (AHU service with filter change) is £240–£585 plus VAT. Parts and repairs are only done once you approve the price.
An air handling unit (AHU) is a large central unit that filters, heats, cools and moves air through a building's ductwork, often with heat recovery.
Working in St Helens
St Helens has the full mix of premises that need cooling and heating: offices, shops, restaurants, gyms, clinics and technical rooms.
We work across St Helens's postcode districts, including PO33 and WA10. We also work in nearby Prescot, Ashton in Makerfield and Huyton. Each visit in St Helens ends with a written report: what was checked, readings taken and anything that needs attention, priced separately for you to approve.
Included as standard
- Filter changes to the specified grade
- Fan, belt and motor checks
- Coil and drip tray cleaning
- Damper and actuator checks
- Heat recovery device checks
Prices in St Helens
Prices below include our regional adjustment for the North West (2% below the UK guide).
| Item | Guide price (ex VAT) | Inc VAT | Basis |
|---|---|---|---|
| AHU service with filter change | £240–£585 | £288–£702 | per visit |
| Fan / motor replacement | £1,395–£4,850 | £1,674–£5,820 | per fan |
| Full AHU replacement | £14,650–£67,995 | £17,580–£81,594 | per unit |
Ex VAT. Filters are charged at cost for the grade specified.
The visit, step by step
Inspect
We record the AHU type, condition, filter grades and controls.
Service
Filters are changed and components cleaned and checked.
Report
Readings and recommendations are reported.
Upgrade or replace
Where needed, we quote for fan upgrades or replacement.
What to think about in St Helens
Filters
Filter grades should match the original design or current guidance for the building.
Conservation areas
Historic streets and listed buildings in and around St Helens are more likely to need planning permission for outdoor units on visible elevations. We check with the local planning authority before work is booked.
Hygiene
Drip trays and coils must be kept clean to avoid biological growth.
Shared buildings
In multi-let buildings, roof space, risers and plant areas are often controlled by a managing agent. We work to their permits and method-statement requirements.
Premises we work in around St Helens
- Warehouses and industrial: cooling for offices, mezzanines, control rooms and temperature-sensitive areas.
In England, systems holding 5 tonnes CO2 equivalent of refrigerant or more fall under GB F-gas rules, with regular leak checks and records; buildings with more than 12 kW of air conditioning in total also need a periodic energy inspection.
Common questions from businesses in St Helens
How much does an air handling unit service cost in St Helens?
In St Helens, expect about £240–£585 per unit, per visit, plus VAT. A typical job (AHU service with filter change) is £240–£585 plus VAT. Any parts or repairs are priced before we go ahead.
Do you also cover Prescot, Ashton in Makerfield and Huyton?
Yes. Alongside St Helens, we also cover Prescot, Ashton in Makerfield and Huyton. Each has its own page with local guide prices.
Which postcodes do you cover in St Helens?
All of them, including PO33 and WA10. Give us your postcode when you enquire and we will confirm the visit details.
Can you upgrade old AHU fans?
Yes. EC fan upgrades are a common way to cut energy use without replacing the whole unit.
How often should an AHU be serviced?
Typically every three to six months, depending on use and filter loading.
Talk to us about your premises in St Helens
The visit price is agreed before we book. We reply with a guide price or available dates.