Commercial ventilation, County Durham
Air handling units (AHU) in County Durham
AHU replacement, EC fan upgrades, controls and planned servicing, across County Durham.
- From £9,150 + 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.
Our team is based in Great Barr, Birmingham, and we work throughout County Durham, from Hartlepool, Stockton-on-Tees, Durham, Chester-le-Street and Billingham. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
Air handling units in County Durham at a glance
- Area
- County Durham
- Towns listed
- 14, largest Darlington
- Postcode districts
- TS19, DH1, DH6, DH2, DH3 and TS2
- Price region
- North East
- Survey
- Free survey (UK mainland)
What the work involves
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.
EC fan retrofit
Belt-driven fans replaced with direct-drive EC fans.
Controls upgrade
New controls, sensors and BMS integration.
Planned servicing
Filters, belts, coils, drains and controls on a schedule.
Guide prices in County Durham
| 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 |
These ranges use our North East rates. Prices exclude VAT. You get a fixed written price before any work is booked.
Common reasons people call
- Rooms that no longer get enough air
- Rising energy bills from old plant
- Frequent belt or fan failures
Rules in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. Workplaces must also be ventilated with a sufficient quantity of fresh or purified air under the Workplace (Health, Safety and Welfare) Regulations 1992.
How the job runs
- Survey
- Options
- Plan
- Install
- Commission
Towns we cover in County Durham
- Darlington
- Hartlepool
- Stockton-on-Tees
- Durham
- Chester-le-Street
- Billingham
- Stanley
- Consett
- Newton Aycliffe
- Bishop Auckland
- Seaham
- Peterlee
- Spennymoor
- Annfield Plain
Questions about air handling units (AHU) in County Durham
Are prices different in County Durham?
Our guide prices are adjusted by region. In County Durham we use North East rates, so air handling unit replacement, small to medium unit, like-for-like position is typically £9,150 to £32,150 + VAT per unit.
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.
Is the survey free in County Durham?
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.
Which rules apply to ventilation in County Durham?
In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.
Other services in County Durham
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.