Air handling units in Derry
Air handling unit servicing and repairs in Derry, booked around your opening hours and priced up front.
- 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 Derry?
Guide price in Derry: £225–£545 per unit, per visit ex VAT, with a typical job (AHU service with filter change) at £225–£545 plus VAT. Nothing beyond the agreed visit goes ahead without your say-so.
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.
Derry and surrounding areas
In Derry, typical commercial premises include town-centre shops and offices, surgeries, gyms and units on business parks.
We cover every Derry postcode, including BT47. Neighbouring towns we cover include Strabane, Limavady and Coleraine. Businesses across County Londonderry can combine servicing with any F-gas leak checks their systems need, which saves a separate attendance.
What we do
- Filter changes to the specified grade
- Fan, belt and motor checks
- Coil and drip tray cleaning
- Damper and actuator checks
- Repairs, upgrades and full replacement
Air handling units prices in Derry
These guide prices are adjusted for Northern Ireland, where labour and access costs run about 8% below the UK guide.
| Item | Guide price (ex VAT) | Inc VAT | Basis |
|---|---|---|---|
| AHU service with filter change | £225–£545 | £270–£654 | per visit |
| Fan / motor replacement | £1,350–£4,550 | £1,620–£5,460 | per fan |
| Full AHU replacement | £13,750–£63,995 | £16,500–£76,794 | per unit |
Ex VAT. Filters are charged at cost for the grade specified.
How a visit in Derry works
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.
Things to check in Derry
Energy
Fan upgrades and better controls can cut energy use significantly on older units.
Access and parking
Town-centre jobs in Derry often come down to access — loading restrictions, parking for the van and getting equipment onto a roof. We check this at survey and plan deliveries around it.
Replacement logistics
Large AHU replacements need craneage, road closures and careful programming.
Neighbours and noise
Outdoor units near flats — common above shops — need careful siting so noise at neighbours' windows stays low. We choose positions and quieter units with that in mind.
Who we work with in Derry
- Warehouses and industrial: cooling for offices, mezzanines, control rooms and temperature-sensitive areas.
Compliance in Northern Ireland: refrigerant work falls under EU F-gas rules that apply in Northern Ireland, and buildings with more than 12 kW of air conditioning in total need a periodic energy inspection (often called TM44).
FAQs for Derry
How much does an air handling unit service cost in Derry?
In Derry, expect about £225–£545 per unit, per visit, plus VAT. A typical job (AHU service with filter change) is £225–£545 plus VAT. Any parts or repairs are priced before we go ahead.
Do you also cover Strabane, Limavady and Coleraine?
Yes. Alongside Derry, we also cover Strabane, Limavady and Coleraine. Each has its own page with local guide prices.
Which postcodes do you cover in Derry?
All of them, including BT47. Give us your postcode when you enquire and we will confirm the visit details.
How often should an AHU be serviced?
Typically every three to six months, depending on use and filter loading.
Can you upgrade old AHU fans?
Yes. EC fan upgrades are a common way to cut energy use without replacing the whole unit.
Talk to us about your premises in Derry
The visit price is agreed before we book. We reply with a guide price or available dates.