Home ventilation, Hertfordshire
Extractor fan installation in Hertfordshire
Bathroom, kitchen and utility fans sized to the Part F rates, ducted outside and tested, across Hertfordshire.
- From £185 inc VAT per fan
- Free survey
A common fault in Hertfordshire homes is a bathroom fan ducted into the loft instead of outside.
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 Hemel Hempstead, Stevenage, St Albans, Welwyn Garden City and Cheshunt.
Extractor fans in Hertfordshire at a glance
- Area
- Hertfordshire
- Towns listed
- 32, largest Watford
- Postcode districts
- SG1, SG2, AL1, AL2, AL6 and AL7
- Price region
- East of England
- Survey
- Free survey (UK mainland)
What the work involves
Many existing fans were never doing their job: undersized, ducted into the loft space, fitted with a flex duct crushed in the joists, or switched off by occupants because they were noisy. The rate a fan delivers through a real duct run is often far lower than the number on the box, which is why we size to the room and test the result. For England, Approved Document F gives minimum intermittent extract rates: 15 litres a second for a bathroom, 30 for a kitchen with a cooker hood (60 without one), 30 for a utility room and 6 for a WC.
New fan through an outside wall
Core drilled, sleeved, wired from a fused spur and sealed outside.
Ducted to outside through the loft
Insulated duct to a roof, ridge or soffit outlet so warm moist air does not condense in the loft.
Inline fans
A quiet fan in the loft serving one or two ceiling grilles in a shower room or en-suite.
Guide prices in Hertfordshire
| Work | Guide price |
|---|---|
| Like-for-like extractor fan replacement (existing duct and wiring) (per fan) | £185–£310 inc VAT |
| New extractor fan through an outside wall (core drilled, wired, tested) (per fan) | £360–£575 inc VAT |
| New ducted fan to outside through the loft or ceiling (insulated duct, roof or soffit outlet) (per fan) | £465–£775 inc VAT |
| Inline fan for a shower room or en-suite (loft-mounted, one or two ceiling grilles) (per room) | £575–£950 inc VAT |
| Kitchen extract fan, or cooker hood ducted to outside (per kitchen) | £415–£725 inc VAT |
These ranges use our East of England rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
When to get it looked at
- Mirror still steamed up 20 minutes after a shower
- Mould on the bathroom ceiling or around the window
- The fan runs but a sheet of toilet paper does not stick to the grille
Rules in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. For homes, it sets minimum extract rates such as 15 litres a second for a bathroom and 30 or 60 for a kitchen, and expects mechanical systems to be airflow-tested.
How the job runs
- Quick survey
- Choose the fan
- Fit and duct
- Wire
- Test
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 extractor fan installation in Hertfordshire
Which towns in Hertfordshire do you cover?
All of Hertfordshire, including Hemel Hempstead, Stevenage, St Albans, Welwyn Garden City and Cheshunt. If your town is not listed, send the postcode and we will confirm.
Do you need building regulations for a new extractor fan?
Fitting or replacing an extractor fan has to meet the ventilation and electrical rules, and certain electrical work is notifiable. We do the work to the current standards. Electrical work that is notifiable is certified by a registered electrician, and you get a copy of the certificate and our airflow readings.
How long does fitting a fan take?
A straight replacement takes an hour or two. A new fan with a core-drilled hole or a duct through the loft usually takes half a day.
Are prices different in Hertfordshire?
Our guide prices are adjusted by region. In Hertfordshire we use East of England rates, so like-for-like extractor fan replacement (existing duct and wiring) is typically £185 to £310 inc VAT per fan.
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.
Send a photo of the existing fan and the outside wall and we will price your Hertfordshire job quickly.
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.