Bathroom Extractor Fan Installation Regulations Uk
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The most common approach to meeting the building regulations approved document f is intermittent extract fans with background vents i e.
Bathroom extractor fan installation regulations uk. 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. A bathroom fan must carry at least 20 cubic feet per minute cfm all the time and 50 cfm intermittently according to the healthy house institute. While most bathroom fans have a 100mm spigot the diameter of the air outlet on the back kitchen fans tend to have a 150mm diameter spigot. Building regulations stipulate that you need a fan with a high extract rate in kitchens.
Modern kitchen ventilation is achieved using a cooker hood however on occasion extra ventilation is required. The general rules for ventilating a room are. Extractor fans are located in the bathroom ensuite kitchen and utility room. The bathroom zones for extractor fans uk electrical regulations divide the bathroom into 4 zones.
Zone 1 this is the other zone in the bathroom which is the area covering the same area as zone zero except it extends to 2 25m above the level of the floor. According to the requirements for electrical installations iee wiring regulations 18th edition it is necessary to fit ventilation products that meet a minimum of ipx4 in zones 1 and 2 of a bathroom. You must use the appropriate size fan. A uk bathroom must be ventilated by either a window or an extractor fan if your bathroom has a toilet only you are fine to use a window alone as your source of ventilation in new build bathrooms with a bath and shower mechanical ventilation is required in the form of an extractor fan.
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. The opening should have a typical area of at least 1 20th of the floor area of the room served unless it is a bathroom which can be any openable size. Iee regulations for bathrooms bathrooms are defined as areas of increased electrical hazard.
As far as the installation regulations are concerned it is prohibited to install the bathroom extractor fan in this zone. 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. This means that when installed and connected electrically the product should prevent.
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