Bathroom Extractor Fan Ducting Regulations

For fans the regulations state that should it or other electrical appliances be fitted within zone 1 of the bathroom then a safety or separated extra low voltage or selv fan should be fitted as these as the name suggests are designed to operate with reduced voltage and.

Bathroom extractor fan ducting regulations. 2 0 ventilation air inlets and discharge. The general rules for ventilating a room are. In new build bathrooms with a bath and shower mechanical ventilation is required in the form of an extractor fan. This is because new builds are built to be more airtight so natural ventilation is much lower the ventilation requirements for a bathroom are 15 litres per second 54m3 per hour you might be wondering what the last point means.

A bathroom extractor fan s projected cfm rate is usually stated on the outside of the packaging. Flexible ducting should be pulled taught to minimise. To provide extract ventilation in a kitchen for the purposes of part f an extract fan to outside should have an installed capacity of at least 60 l s. Ducting is used in both residential and commercial environments everywhere from the kitchens in your home right through to supermarkets and factory floors.

For centrifugal fans you are limited to 6 metres for extract rates of 6 to 30 l s and 3 meters for extract rates of 31 to 60 l s. When connecting to axial fans. Building regulations state that bathrooms must be ventilated via a window or extractor fan you may want to use both. Now we all know that electricity and water don t mix thus the need for the zones.

Purge this is achieved by opening the window. You are able to incorporate up to 2 bends in a system up to 30l s this then reduces to 1 bend for higher extract rates. The bathroom zones for extractor fans uk electrical regulations divide the bathroom into 4 zones. These zones are determined by their proximity to water humidity and condensation and the likelihood of the electrical items installed in those areas getting wet.

A new bathroom should have a fan which extracts at a rate of at least 15 litres per minute and continues to run for 15 minutes after the light has been switched off. The fan must duct to the outside. Typically these products are made from various materials such as metal or fibreglass but residential applications tend to be plastic and are manufactured to meet current building regulations.