Bathroom renovation offers a chance to consider energy use, Nieuws.nl says

A bathroom renovation can be an opportunity to cut energy use as well as refresh the room, but measures such as heat-recovery showers and improved insulation need to be weighed alongside ventilation and comfort, Nieuws.nl reports. [1]

The article suggests considering heating that can be used when the bathroom is occupied, rather than keeping the room at a constant temperature. It also recommends looking at insulation when walls or windows are already being renovated.

For hot water, it points to water-saving showerheads and shower heat-recovery systems, which transfer some warmth from used shower water to incoming cold water. But the article does not quantify potential savings or set out costs, so it offers no basis for comparing the payback of these measures.

Ventilation remains important in a damp room: the article says moisture should be removed after showering to help prevent mould and damage to materials. It advises treating heating, insulation and ventilation as connected decisions when planning the work.