Commercial ventilation, Hertfordshire
Car park ventilation in Hertfordshire
Jet fan and extract systems with CO detection for enclosed car parks, across Hertfordshire.
- From £26,200 + VAT per scheme
- Free survey

Enclosed and underground car parks need mechanical ventilation to clear vehicle exhaust in normal use and, in many designs, to help clear smoke in a fire. We install and maintain jet fan and ducted extract systems with carbon monoxide detection and controls.
If you are anywhere in Hertfordshire, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Cheshunt, Hatfield, Bishop's Stortford, Watford and Hemel Hempstead.
Car park ventilation in Hertfordshire at a glance
- Area
- Hertfordshire
- Towns listed
- 32, largest Watford
- Postcode districts
- WD3, EN7, EN8, WD1, WD17 and HA6
- Price region
- East of England
- Survey
- Free survey (UK mainland)
How we do it
CO detection lets the system run at low speed most of the time and boost when pollution rises. Smoke control aspects are designed with the building's fire strategy and fire engineer. We install, commission and maintain the systems and the detection that runs them.
Ducted extract
Traditional ducted systems where layout suits.
CO and NO2 detection
Sensors and controls for demand-led running.
Maintenance
Planned testing of fans, sensors and controls.
Guide prices in Hertfordshire
| Work | Guide price |
|---|---|
| Enclosed car park ventilation: jet fans, controls and CO detection (per scheme) | £26,200–£94,450 + VAT |
East of England rates shown. Prices exclude VAT. The fixed price is confirmed in writing after we have seen the job.
Common reasons people call
- Fans failing or running flat out all day
- Fumes noticeable in stairwells
- Insurer or fire risk assessment actions
Rules in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. Approved Document B sets the ventilation provisions for enclosed car parks, commonly 6 air changes an hour for normal use and 10 in fire conditions.
How the job runs
- Review
- Design input
- Install
- Commission
- Maintain
Towns we cover in Hertfordshire
- Watford
- Hemel Hempstead
- Stevenage
- St Albans
- Welwyn Garden City
- Cheshunt
- Hatfield
- Bishop's Stortford
- Borehamwood
- Hitchin
- Hoddesdon
- Letchworth Garden City
- North Watford
- Harpenden
- Bushey
- Hertford
- Rickmansworth
- Potters Bar
- Berkhamsted
- Ware
- Enfield Lock
- Royston
- Croxley Green
- Broxbourne
- West Watford
- Batchworth
- Tring
- Chorleywood
- Codicote
- Baldock
- Abbots Langley
- Waltham Cross
Questions about car park ventilation in Hertfordshire
Which towns in Hertfordshire do you cover?
All of Hertfordshire, including Cheshunt, Hatfield, Bishop's Stortford, Watford and Hemel Hempstead. If your town is not listed, send the postcode and we will confirm.
Do you design smoke control?
Smoke control is designed with the building's fire strategy and fire engineer; we install, commission and maintain the equipment.
How often should car park fans be tested?
Fans, detection and controls should be serviced and tested on a planned schedule, often twice a year, as set out in the maintenance plan.
Are prices different in Hertfordshire?
Our guide prices are adjusted by region. In Hertfordshire we use East of England rates, so enclosed car park ventilation: jet fans, controls and CO detection is typically £26,200 to £94,450 + VAT per scheme.
Is the survey free in Hertfordshire?
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.
Other services in Hertfordshire
Get a guide price in two minutes
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.