Commercial ventilation, County Down
Air handling units (AHU) in County Down
AHU replacement, EC fan upgrades, controls and planned servicing, across County Down.
- From £9,150 + VAT per unit
- By arrangement
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.
If you are anywhere in County Down, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Holywood, Downpatrick, Bangor, Castlereagh and Newtownards.
Air handling units in County Down at a glance
- Area
- County Down, Northern Ireland
- Towns listed
- 8, largest Bangor
- Postcode districts
- BT4, BT30, BT19, BT20, BT5 and BT6
- Price region
- Northern Ireland
- Survey
- By arrangement, travel quoted first
How we do it
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. We plan the lift, temporary arrangements and isolations with you so the building can keep working.
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.
EC fan retrofit
Belt-driven fans replaced with direct-drive EC fans.
Guide prices in County Down
| Work | Guide price |
|---|---|
| Air handling unit replacement, small to medium unit, like-for-like position (per unit) | £9,150–£32,150 + VAT |
| Air handling unit service: filters, belts or EC fan check, coils, controls (per unit per visit) | £180–£365 + VAT |
Northern Ireland rates shown. Prices exclude VAT. The fixed price is confirmed in writing after we have seen the job. Travel is quoted separately for this area.
Common reasons people call
- Rooms that no longer get enough air
- Rising energy bills from old plant
- Frequent belt or fan failures
Rules in Northern Ireland
In Northern Ireland, ventilation is covered by the Building Regulations (Northern Ireland) and Technical Booklet K. Employers in Northern Ireland have an equivalent ventilation duty under the 1993 Northern Ireland workplace regulations.
How the job runs
- Survey
- Options
- Plan
- Install
- Commission
Towns we cover in County Down
Questions about air handling units (AHU) in County Down
Are prices different in County Down?
Our guide prices are adjusted by region. In County Down we use Northern Ireland rates, so air handling unit replacement, small to medium unit, like-for-like position is typically £9,150 to £32,150 + VAT per unit.
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.
Is the survey free in County Down?
Visits here are by arrangement. Because of the ferry or long travel involved, we quote travel separately and in writing before you commit, and we can often combine visits to keep the cost down.
Which rules apply to ventilation in County Down?
In Northern Ireland, ventilation is covered by Technical Booklet K of the Building Regulations (Northern Ireland). Workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations (Northern Ireland) 1993.
Other services in County Down
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.