Commercial ventilation in Harrow
A free survey, a clear specification and a fixed price for commercial ventilation in Harrow.
- 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 Harrow?
Budget roughly £3,795–£31,500 per system ex VAT in Harrow. For a typical job — supply and extract for a 150 m² office — expect £8,895–£20,995 plus VAT. The fixed price follows a 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 Harrow
Premises in Harrow are often in mixed-use buildings with shared roofs and tight access, so outdoor unit positions are agreed early.
We work across Harrow's postcode districts, including HA2. We also work in nearby Wealdstone, Brent and Wembley. For commercial ventilation in Harrow, the survey looks at how the space is used, where equipment and ductwork can go and what the electrical supply can take.
Included as standard
- Fresh-air rate calculation for each space
- Supply and extract fans, ductwork and grilles
- Filters, attenuators and fire dampers where required
- Controls such as timers or CO2 sensors
- Air-flow measurement and balancing
Prices in Harrow
Guide prices for Harrow, set for London. Your fixed price comes in writing.
| Item | Guide price (ex VAT) | Inc VAT | Basis |
|---|---|---|---|
| Toilet or kitchenette extract | £635–£1,850 | £762–£2,220 | per room |
| Supply and extract system, small premises | £3,795–£12,750 | £4,554–£15,300 | per system |
| CO2 demand control | £505–£1,595 | £606–£1,914 | per zone |
| Ductwork | £85–£245 | £102–£294 | per metre |
Ex VAT. Larger systems and fire-rated ductwork are priced from a full design.
How a job in Harrow 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 Harrow we agree timings around your opening hours.
Balance
Air flows are measured and balanced to the design.
Local points to consider
Noise
Fans and grilles are selected and attenuated to keep noise down.
Conservation areas
Historic streets and listed buildings in and around Harrow are more likely to need planning permission for outdoor units on visible elevations. We check with the local planning authority before work is booked.
Fire
Ducts passing through fire-rated walls or floors need fire dampers.
Access and parking
Town-centre jobs in Harrow often come down to access — loading restrictions, parking for the van and getting equipment onto a roof. We check this at survey and plan deliveries around it.
Typical premises in Harrow
- Gyms and leisure: high-capacity cooling and fresh air for gym floors, studios and changing rooms.
- Schools and education: classroom cooling, ventilation and IT room cooling, installed in the holidays.
- Offices: zoned cooling and heating for open-plan floors, meeting rooms and comms rooms.
- Pubs and bars: cooling for busy bars, function rooms and cellars, sited with neighbours in mind.
Two rules matter for most businesses in England: GB F-gas rules (leak checks from 5 tonnes CO2e) and the periodic energy inspection for more than 12 kW of air conditioning.
Common questions from businesses in Harrow
How much does commercial ventilation cost in Harrow?
Guide prices in Harrow run from about £3,795 to £31,500 per system, plus VAT. A typical job (supply and extract for a 150 m² office) costs £8,895–£20,995 plus VAT. We fix the price in writing after a free survey.
Do you also cover Wealdstone, Brent and Wembley?
Yes. Alongside Harrow, we also cover Wealdstone, Brent and Wembley. Each has its own page with local guide prices.
Which postcodes do you cover in Harrow?
All of them, including HA2. Give us your postcode when you enquire and we will confirm the visit details.
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.
Does air conditioning provide fresh air?
No. Most air conditioning recirculates room air. Fresh air needs a ventilation system or openable windows.
Need commercial ventilation in Harrow?
Free survey and fixed written quote. We reply with a guide price or to book the survey.