- Comes with a 2 year guarantee 7.5kW Electric Shower Featuring a wealth of high performance features and benefits including optimum temperature control, easy filter access, and an eco setting that saves water and energy, this accommodating shower is sure to be a much-welcomed addition to your bathroom! 7.5kW electric showers require less power to run, therefore there is a more gentle flow of water, meaning you shower is unlikely to ever run cold. Adjustable Shower Handset The Mira shower head is the ideal addition to your bathroom. The shower head sits in an adjustable holder on a riser rail allowing you to adjust the height of your shower. It offers fantastic performance, practicality and great looks thanks to its classic white finish shower head and unit .