Air handling units (AHU) in Buckinghamshire

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.

Every job in Buckinghamshire gets a written quote before it starts and a commissioning record when it finishes. We cover Aylesbury, Bletchley, Amersham, Chesham and Gerrards Cross and the villages around them.

Air handling units in Buckinghamshire at a glance

Area: Buckinghamshire
Towns listed: 13, largest Milton Keynes
Postcode districts: MK1, MK2, HP6, HP7, HP5 and HP6
Price region: South East
Survey: Free survey (UK mainland)

How we do it

Many AHUs in older offices, schools and retail units run on belt-driven fans, clogged filters and controls nobody understands. Replacing the fan section with EC fans, or the whole unit with a modern heat recovery AHU, can cut running costs and noise while restoring airflow. New units must meet current ecodesign rules for fan efficiency and heat recovery.

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 Buckinghamshire

Air handling units (AHU) guide prices in Buckinghamshire
Work	Guide price
Air handling unit replacement, small to medium unit, like-for-like position (per unit)	£10,950–£38,450 + VAT
Air handling unit service: filters, belts or EC fan check, coils, controls (per unit per visit)	£215–£435 + VAT

South East rates shown. Prices exclude VAT. The fixed price is confirmed in writing after we have seen the job.

Signs it is time to call us

Frequent belt or fan failures
Noisy plant rooms or rooftop units
Filters that are never changed

Rules in England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). Employers have a separate duty under the Workplace Regulations 1992 to provide effective and suitable ventilation.

How the job runs

Survey
Options
Plan
Install
Commission

Towns we cover in Buckinghamshire

Questions about air handling units (AHU) in Buckinghamshire

Are prices different in Buckinghamshire?

Our guide prices are adjusted by region. In Buckinghamshire we use South East rates, so air handling unit replacement, small to medium unit, like-for-like position is typically £10,950 to £38,450 + VAT per unit.

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 it worth replacing belt-driven fans with EC fans?

Often yes. EC fans are usually more efficient, quieter and need no belt changes, and the retrofit can cost much less than a new unit.

Is the survey free in Buckinghamshire?

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 Buckinghamshire?

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.