Sauna heaters can sometimes trip residual current devices (RCDs). BS7671, Regulation 703.411.3.3 (page 212 BS7671, 2008 incorporating Amendment No1: 2011) allows these heaters to be connected to NON-RCD circuits. All wiring should comply with BS7671, the IEE Wiring Regulations 17th edition: 2008 incorporating Amendment No1: 2011. Any installation work should comply with The Building Regulations Part 'P' Fixing screws are not provided despite the instruction manual stating that they are provided.