Our latest boiler survey reveals what customers and engineers think about the high-end gas boiler brand, Vaillant. Vaillant has a decent four-star customer score thanks to the vast majority of ...

A leading gas boiler manufacturer has been accused of misleading consumers by inventing a meaningless new term to suggest its new appliances will help tackle climate change. Vaillant is marketing ...

The boxy machines look and function like large air-conditioners on reverse, but Germans hope they hold the key to Europe’s push for fossil-free heating. By Melissa Eddy and Patrick Junker ...