Dorchester, Dorset
Commercial ventilation design and installation in Dorchester
Supply and extract with heat recovery for offices, shops, clinics and fit-outs. Covering Dorchester and DT1, DT2 and DT3.
- From £8,250 + VAT per system
- Free survey
Businesses in Dorchester often need us when meeting rooms get stuffy or a new layout leaves areas with no fresh air.
Work in Dorchester follows the rules for England and finishes with a written record of what was fitted and how it was set up.
Commercial ventilation in Dorchester at a glance
- Town
- Dorchester, Dorset
- Postcode districts
- DT1, DT2 and DT3
- Nearby
- Weymouth (7 miles), Portland (10 miles) and Bridport (14 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
How we approach commercial ventilation in Dorchester
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.
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 Dorchester
| Work | Guide price |
|---|---|
| Small office or shop: heat recovery unit, ductwork and controls (up to about 150 m²) (per system) | £8,250–£17,650 + VAT |
| Office supply and extract ventilation with heat recovery, during a fit-out (per m² of floor) | £55–£130 + VAT |
These ranges use our South West 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
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. Employers have a separate duty under the Workplace Regulations 1992 to provide effective and suitable ventilation.
Questions from Dorchester
What is the price of commercial ventilation in Dorchester?
Guide prices for Dorchester use South West rates: small office or shop: heat recovery unit, ductwork and controls (up to about 150 m²) is typically £8,250 to £17,650 + VAT per system. We confirm a fixed price in writing before any work starts.
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 ventilation a legal requirement in the workplace?
Yes. The Workplace (Health, Safety and Welfare) Regulations 1992 require effective and suitable ventilation with a sufficient quantity of fresh or purified air in every enclosed workplace.
Is the survey free in Dorchester?
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.
How do I get a price for commercial ventilation in Dorchester?
Use the guide price tool, the form on this page, live chat, WhatsApp or call 0800 088 6341. A postcode and a couple of photos help us give you a useful answer first time.
Book a free site survey in Dorchester and send floor plans if you have them.
Commercial ventilation near Dorchester
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