Why Vent - Types of Fans - Siting the Fans - Ducting - Data Sheets
Suggested Size Fan - Calculator - ( see notes below )
For a second fan selector based only on the building regulations and excludes Air Change Rates click here.
Building Regulations Part F 1995 England Wales
minimum size fan allowed ( extract Table 1 ) - to see official ventilation regulations
In rooms with no natural light it would be appropriate for the fans to be controlled by the operation of the light switch.
Loss of pressure from the use of ducting see Ducting
Dwellings with open-flued combustion appliances ( Gas / Oil or Solid fuel ) see Notes
| Domestic | We researched various British manufacturers who's range of recommended room air rate changes are listed below |
Room Rate Used |
|---|---|---|
| In Shower Area | 15 - 20 | 20 |
| Bathroom & Shower Rooms | 15 - 20 | 15 |
| Bathroom | 6 - 10 | 8 |
| Bedrooms | 2 - 4 | 4 |
| Halls & Landings | 4 - 6 | 5 |
| Kitchens | 10 - 20 | 15 |
| Living & Other Domestic Rooms | 4 - 6 | 5 |
| Toilets - Domestic | 6 - 10 | 8 |
| Utility Rooms ** | 15 - 20 | 15 |
**Utility room means a room designed to or likely to be used to contain clothes washing and similar equipment such as a sink, washing machine, tumble dryer or other feature or equipment which may reasonably be expected to produce water vapour in significant quantities.
| Cafés | 10 - 15 | 15 |
| Canteens | 8 - 12 | 10 |
| Cellars | 3 - 10 | 6 |
| Changing Rooms with Showers | 15 - 20 | 15 |
| Conference Rooms | 8 - 12 | 8 |
| Garages | 6 - 10 | 8 |
| Hairdressing Salons | 10 - 15 | 13 |
| Hospital Wards | 6 - 8 | 7 |
| Laundries & Launderettes | 10 - 15 | 13 |
| Meeting Rooms | 6 - 12 | 7 |
| Offices | 4 - 6 | 6 |
| Restaurants & Bars | 10 - 15 | 12 |
| School Rooms | 5 - 7 | 6 |
| Shops | 8 - 10 | 9 |
| Sports Facilities | 4 - 6 | 6 |
| Rooms | 5 | |
| Workshops | 6 - 10 | 8 |