Commercial ventilation design and installation in Hertfordshire

Businesses in Hertfordshire often need us when meeting rooms get stuffy or a new layout leaves areas with no fresh air.

Our team is based in Great Barr, Birmingham, and we work throughout Hertfordshire, from Hemel Hempstead, Stevenage, St Albans, Welwyn Garden City and Cheshunt. Surveys for new installations are free on the UK mainland, with a written quote afterwards.

Commercial ventilation in Hertfordshire at a glance

Area: Hertfordshire
Towns listed: 32, largest Watford
Postcode districts: SG5, EN10, EN11, SG5, SG6 and WD2
Price region: East of England
Survey: Free survey (UK mainland)

What the work involves

Employers must make sure every enclosed workplace is ventilated by a sufficient quantity of fresh or purified air under the Workplace (Health, Safety and Welfare) Regulations 1992. In practice, designers work to rates such as 10 litres a second per person for offices, taken from Approved Document F and CIBSE guidance, and adjust for meeting rooms, kitchens and toilets. Typical jobs are fit-outs and refurbishments: a new tenant needs ventilation to match a new layout, an old system cannot keep up with more staff, or a change of use needs a fresh design.

Toilet and kitchenette extract

Dedicated extract for welfare areas.

Demand control

CO2 or occupancy sensors that slow the system when rooms are empty.

Design and build or install-only

We design it, or install to a consultant's drawings.

Guide prices in Hertfordshire

Commercial ventilation design and installation guide prices in Hertfordshire
Work	Guide price
Small office or shop: heat recovery unit, ductwork and controls (up to about 150 m²) (per system)	£8,350–£17,800 + VAT
Office supply and extract ventilation with heat recovery, during a fit-out (per m² of floor)	£60–£130 + VAT

These ranges use our East of England rates. Prices exclude VAT. You get a fixed written price before any work is booked.

Signs it is time to call us

Old units that are noisy, inefficient or failing
Stuffy meeting rooms and afternoon drowsiness
More staff than the system was designed for

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

Site survey
Design
Install
Commission
Hand over

Towns we cover in Hertfordshire

Questions about commercial ventilation design and installation in Hertfordshire

Are prices different in Hertfordshire?

Our guide prices are adjusted by region. In Hertfordshire we use East of England rates, so small office or shop: heat recovery unit, ductwork and controls (up to about 150 m²) is typically £8,350 to £17,800 + VAT per system.

How much does commercial ventilation cost?

A small office or shop with a single heat recovery unit typically costs £7,950 to £16,950 excluding VAT. Larger fit-outs are often priced at around £55 to £125 per square metre of floor, depending on design and ceiling access.

How much fresh air does an office need?

A common design rate for offices is 10 litres a second per person, used in Approved Document F and CIBSE guidance, with more for meeting rooms and areas with higher occupancy.

Is the survey free in Hertfordshire?

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 Hertfordshire?

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.

Ask about working to your fit-out programme in Hertfordshire.