Commercial ventilation in Dereham
A free survey, a clear specification and a fixed price for commercial ventilation in Dereham.
- Free site survey and fixed written quote
- Equipment, positions and price set out in writing
- Work planned around your opening hours
How much does commercial ventilation cost in Dereham?
Budget roughly £3,195–£26,500 per system ex VAT in Dereham. For a typical job — supply and extract for a 150 m² office — expect £7,500–£17,795 plus VAT. You get a fixed written quote after the free survey.
Commercial ventilation brings outdoor air into a building and removes stale air, using fans and ductwork to supply and extract air at the rates needed for the number of people and the activity.
Working in Dereham
Dereham is a smaller town in Norfolk, with independent shops, offices, surgeries, pubs and local business units. Norwich is about 25 km away.
We work across Dereham's postcode districts, including NR19. Nearby, we also cover Norwich (about 25 km), Thetford (about 32 km) and King's Lynn (about 37 km). Buildings across Norfolk range from converted period offices to modern units with deep ceiling voids, so we measure each site rather than relying on a standard package.
What is included
- Fresh-air rate calculation for each space
- Supply and extract fans, ductwork and grilles
- Filters, attenuators and fire dampers where required
- Air-flow measurement and balancing
- Commissioning records
Commercial ventilation prices in Dereham
Guide prices for Dereham, set for the East of England. Your fixed price comes in writing.
| Item | Guide price (ex VAT) | Inc VAT | Basis |
|---|---|---|---|
| Toilet or kitchenette extract | £535–£1,550 | £642–£1,860 | per room |
| Supply and extract system, small premises | £3,195–£10,750 | £3,834–£12,900 | per system |
| CO2 demand control | £425–£1,350 | £510–£1,620 | per zone |
| Ductwork | £70–£210 | £84–£252 | per metre |
Ex VAT. Larger systems and fire-rated ductwork are priced from a full design.
How a job in Dereham works
Assess
We work out how many people use each space and the fresh-air rate needed.
Design
Fan, duct and grille sizes are designed for air flow, noise and energy use.
Install
Ductwork and fans are installed and connected to controls. In Dereham we agree timings around your opening hours.
Balance
Air flows are measured and balanced to the design.
Things to check in Dereham
Heat recovery
Bringing in cold air in winter costs energy. Heat recovery units reclaim much of it.
Conservation areas
Historic streets and listed buildings in and around Dereham are more likely to need planning permission for outdoor units on visible elevations. We check with the local planning authority before work is booked.
Noise
Fans and grilles are selected and attenuated to keep noise down.
Roof and height work
Flat roofs, high walls and atriums need the right access equipment and edge protection. We plan towers, MEWPs or scaffold before the job, not on the day.
Premises we work in around Dereham
- Pubs and bars: cooling for busy bars, function rooms and cellars, sited with neighbours in mind.
- Restaurants and cafés: dining rooms that stay comfortable next to a hot kitchen and a busy service.
- Gyms and leisure: high-capacity cooling and fresh air for gym floors, studios and changing rooms.
- Healthcare and dental: clean, quiet cooling for surgeries, clinics, dental practices and care settings.
In England, systems holding 5 tonnes CO2 equivalent of refrigerant or more fall under GB F-gas rules, with regular leak checks and records; buildings with more than 12 kW of air conditioning in total also need a periodic energy inspection.
Questions about commercial ventilation in Dereham
How much does commercial ventilation cost in Dereham?
Guide prices in Dereham run from about £3,195 to £26,500 per system, plus VAT. A typical job (supply and extract for a 150 m² office) costs £7,500–£17,795 plus VAT. We fix the price in writing after a free survey.
Do you also cover Norwich, Thetford and King's Lynn?
Yes. Alongside Dereham, we also cover Norwich, Thetford and King's Lynn. Each has its own page with local guide prices.
Which postcodes do you cover in Dereham?
All of them, including NR19. Give us your postcode when you enquire and we will confirm the visit details.
Do you install kitchen extraction?
Commercial kitchen canopies are a specialist area. We focus on general supply and extract, toilets and heat recovery, and can advise on kitchen requirements.
How much fresh air does an office need?
Guidance for offices is typically around 10 litres per second per person, with more for rooms with higher pollutant loads. We calculate it per space.
Get a guide price for Dereham
Free survey and fixed written quote. We reply with a guide price or to book the survey.