Converting all UK homes to soft water ‘could save up to 8.2m tonnes of CO2 every year’

Energy usage with softened water is 23.8% lower for gas heaters and 17.8% lower for electric heaters, according to new research

Pathway to COP26 report

Converting all UK hard water homes to soft water could save up to 8.24 million tonnes of carbon dioxide, equivalent to taking 1.8 million cars off the road or planting 136 million trees.

That’s according to new research by the manufacturer Harvey Water Softeners, which suggests energy usage with softened water is 23.8% lower for gas heaters and 17.8% for electric heaters, compared to hard water.

Hard water is water that contains higher mineral content.

Energy usage with hard water is believed to be higher mainly due to limescale build-up. Limescale is caused by calcium and magnesium being left behind when hard water evaporates.

It is estimated that around 13 million homes in the UK are in hard water regions and the average family of four living in these areas can accumulate 70 kilograms of limescale every year.

Limescale deposits within a heating system can cause blockages in pipework and boilers, reducing heating efficiency and increasing gas bills.

If you enjoyed this story you can sign up to our weekly email for Energy Live News – and if you’re interested in hearing more about the journey to net zero by 2050, you can also sign up to the future Net Zero newsletter. 

Latest Podcast