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Bathroom Zoning Areas

The easy guide to bathroom zoning in accordance with IEE Wiring Regulations 17th Edition.

There are two main important considerations to take into account when siting ventilation equipment or any other appliance in a location containing a bath or shower:

  • The utmost safety for the people bathing or showering
  • Whether the equipment will function correctly according to where it is sited.

Bathroom Zoning Areas Diagram

Zone 0 - IPX7

Inside the bath or shower tray itself. Any appliance installed in this zone must have a minimum rating of IPX7, which is totally immersion proof. It is not recommended to install any ventilation equipment into this zone.

Zone 1 - IPX4

The area above the bath or shower tray area to a height of 2.25m from the floor. In this zone a minimum rating requirement is IPX4.

EnviroVent's extract fan ranges rated to a minimum of IPX4 include:

Zone 2 - IPX4

The area stretching 0.6m outside the perimeter of the bath to a height of 2.25m. As with Zone 1, the minimum rating for this zone is IPX4.

EnviroVent's extract fan ranges rated to a minimum of IPX4 include:

Zone 1 & 2 - IPX5

Applicable to both Zone 1 or 2, if the area is at risk of splashing or water jets to be used, it is recommended to install a SELV fan (12V) with a rating of IPX5 or above. For utmost safety, the transformer or power supply pack should be installed outside the bathroom area.

EnviroVent low voltage extract fan ranges rated to a minimum of IPX5 include: