Air handling units in County Londonderry
Clear prices and written reports for air handling unit servicing and repairs in County Londonderry.
- 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 County Londonderry?
Guide price in County Londonderry: £225–£545 per unit, per visit ex VAT, with a typical job (AHU service with filter change) at £225–£545 plus VAT. Any extra work is priced and approved before it starts.
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 County Londonderry
We cover all of County Londonderry, including Derry, Coleraine, Limavady and Magherafelt. We quote for premises right across County Londonderry, including rural and edge-of-town sites.
Postcode districts we cover include BT28, BT45, BT46, BT47, BT48, BT49, BT51 and BT52. Service and repair visits in County Londonderry are booked around your opening hours, with the price agreed before we come.
What we do
- Filter changes to the specified grade
- Coil and drip tray cleaning
- Damper and actuator checks
- Heat recovery device checks
- Repairs, upgrades and full replacement
Air handling units prices in County Londonderry
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.
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.
Before you book in County Londonderry
Replacement logistics
Large AHU replacements need craneage, road closures and careful programming.
Access and parking
Town-centre jobs in County Londonderry 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.
Energy
Fan upgrades and better controls can cut energy use significantly on older units.
Leased premises
If your County Londonderry premises are leased, the landlord's written consent is usually needed for external units, wall penetrations and roof access. We provide drawings and data sheets for the request.
Premises we work in around County Londonderry
- Warehouses and industrial: cooling for offices, mezzanines, control rooms and temperature-sensitive areas.
Two rules matter for most businesses in Northern Ireland: EU F-gas rules that apply in Northern Ireland (leak checks from 5 tonnes CO2e) and the periodic energy inspection for more than 12 kW of air conditioning.
Your questions answered
How much does an air handling unit service cost in County Londonderry?
In County Londonderry, 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 County Tyrone, County Antrim and County Armagh?
Yes. Alongside County Londonderry, we also cover County Tyrone, County Antrim and County Armagh. Each has its own page with local guide prices.
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 County Londonderry
The visit price is agreed before we book. We reply with a guide price or available dates.