Commercial ventilation design and installation in Longfield

A change of use in Longfield often needs a fresh ventilation design, which we can provide.

Whether the property is in the middle of Longfield or one of the villages around it, the process is the same: a look at the building, a written price, then fitting and testing on the agreed day.

Commercial ventilation in Longfield at a glance

Town: Longfield, Kent
Postcode districts: DA3, DA4 and DA13
Nearby: Hartley (1 mile), Swanscombe (4 miles) and Gravesend (4 miles)
Price region: South East
Survey: Free survey (UK mainland)

Commercial ventilation for Longfield premises

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.

Heat recovery supply and extract

One or more units with ductwork to diffusers, sized for occupancy.

Toilet and kitchenette extract

Dedicated extract for welfare areas.

Guide prices in Longfield

Commercial ventilation design and installation guide prices in Longfield
Work	Guide price
Small office or shop: heat recovery unit, ductwork and controls (up to about 150 m²) (per system)	£8,750–£18,650 + VAT
Office supply and extract ventilation with heat recovery, during a fit-out (per m² of floor)	£60–£140 + VAT

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

When to get it looked at

A fit-out or change of layout
A change of use that needs a new ventilation design
Windows the only source of fresh air

Rules that apply 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.

Questions from Longfield

Do you cover Longfield and nearby?

Yes. We cover Longfield and nearby places including Hartley, Swanscombe, Gravesend and Dartford. Send your postcode and we will confirm.

Can you work as a subcontractor on a fit-out?

Yes. We can install to a main contractor's programme and consultants' drawings, and supply commissioning records for handover.

Do we need building regulations approval?

New or altered ventilation in non-domestic buildings usually forms part of the building control application for the works. We provide the design information and commissioning records needed.

What is the price of commercial ventilation in Longfield?

Guide prices for Longfield use South East rates: small office or shop: heat recovery unit, ductwork and controls (up to about 150 m²) is typically £8,750 to £18,650 + VAT per system. We confirm a fixed price in writing before any work starts.

Is the survey free in Longfield?

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.

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