The same shower can feel superb in one house and weak in the next, and the water system is almost always the reason. This guide shows how to tell whether you have a gravity-fed, combi or unvented system, then which shower types suit each: power, gravity-pumped smart, mixer, high-pressure smart or electric. It includes a worked four-bathroom cost comparison and Aqualisa picks with prices and stock checked on 20 October 2026.
Electric Shower kW Guide: 8.5, 9.5 or 10.5kW Compared | KT
Which electric shower kW rating do you need? For most homes 9.5kW is the sensible default, but the right answer depends on flow, winter water temperature and your circuit. This guide uses the Aqualisa eVolve datasheet to compare 8.5, 9.5 and 10.5kW flow rates, explains why more power does not mean a hotter shower, covers MCB sizes and Part P, and runs a worked winter en-suite example.
Geberit vs Grohe vs Aqualisa: Which Bathroom Brand? | KT
Geberit, Grohe and Aqualisa aren't competing for the same job, they're doing three different jobs on the same bathroom. Here's which brand handles what, when thermostatic actually matters, and when an electric shower beats a mixer outright.