Commercial ventilation in Gwynedd
A free survey, a clear specification and a fixed price for commercial ventilation in Gwynedd.
- 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 Gwynedd?
Budget roughly £2,795–£23,500 per system ex VAT in Gwynedd. For a typical job — supply and extract for a 150 m² office — expect £6,595–£15,695 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.
Where we work around Gwynedd
We cover all of Gwynedd, including Bangor, Gwynedd, Holyhead and Caernarfon. We quote for premises right across Gwynedd, including rural and edge-of-town sites.
Postcode districts we cover include LL21, LL38, LL45, LL52, LL59, LL65, LL72 and SY20. Buildings across Gwynedd 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 the job covers
- Fresh-air rate calculation for each space
- Supply and extract fans, ductwork and grilles
- Controls such as timers or CO2 sensors
- Air-flow measurement and balancing
- Commissioning records
Local guide prices for Gwynedd
Prices below include our regional adjustment for Wales (5% below the UK guide).
| Item | Guide price (ex VAT) | Inc VAT | Basis |
|---|---|---|---|
| Toilet or kitchenette extract | £470–£1,395 | £564–£1,674 | per room |
| Supply and extract system, small premises | £2,795–£9,450 | £3,354–£11,340 | per system |
| CO2 demand control | £375–£1,195 | £450–£1,434 | per zone |
| Ductwork | £60–£185 | £72–£222 | per metre |
Ex VAT. Larger systems and fire-rated ductwork are priced from a full design.
The steps for a project in Gwynedd
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 Gwynedd we agree timings around your opening hours.
Balance
Air flows are measured and balanced to the design.
Before you book in Gwynedd
Fire
Ducts passing through fire-rated walls or floors need fire dampers.
Leased premises
If your Gwynedd premises are leased, the landlord's written consent is usually needed for external units, wall penetrations and roof access. We provide drawings and data sheets for the request.
Noise
Fans and grilles are selected and attenuated to keep noise down.
Working hours
Most Gwynedd businesses prefer noisy work outside trading hours. Early starts, evenings and weekends can be arranged and are priced up front.
Typical premises in Gwynedd
- Schools and education: classroom cooling, ventilation and IT room cooling, installed in the holidays.
- Gyms and leisure: high-capacity cooling and fresh air for gym floors, studios and changing rooms.
- Restaurants and cafés: dining rooms that stay comfortable next to a hot kitchen and a busy service.
- Offices: zoned cooling and heating for open-plan floors, meeting rooms and comms rooms.
Compliance in Wales: refrigerant work falls under GB F-gas rules, and buildings with more than 12 kW of air conditioning in total need a periodic energy inspection (often called TM44).
Common questions from businesses in Gwynedd
How much does commercial ventilation cost in Gwynedd?
Guide prices in Gwynedd run from about £2,795 to £23,500 per system, plus VAT. A typical job (supply and extract for a 150 m² office) costs £6,595–£15,695 plus VAT. We fix the price in writing after a free survey.
Do you also cover Clwyd and Powys?
Yes. Alongside Gwynedd, we also cover Clwyd and Powys. Each has its own page with local guide prices.
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.
Can ventilation and air conditioning work together?
Yes, and they should. We coordinate grilles, controls and set points so both systems work efficiently.
Talk to us about your premises in Gwynedd
Free survey and fixed written quote. We reply with a guide price or to book the survey.