Will I need additional ventilation in my kitchen?

When inserting or removing an internal wall, care should be taken not to make ventilation worse. Any new kitchen or utility room should be provided with a mechanical extract fan.

The type of room will determine how much ventilation is required. Part F of the building regulations says that where a kitchen previously had only a recirculating fan this can be retained or replaced if it is made no worse.

However, to minimise condensation, an extractor sending air externally is preferable.

In a kitchen and utility room it will need to extract 30 litres per second if over a hob and 60 litres if placed elsewhere.

Further information

Part F of the building regulations- England

Part F of the building regulations - Wales

What electrical requirements are there are for my kitchen project?

Building regulations application FAQs