What do the codes and symbols mean on the front of the NCB300?

Smart meters are devices that measure how much gas and electricity you’re using, with the readings automatically sent to your

Expansion vessels, sometimes called expansion tanks, are found in most domestic pressurised heating systems, such as combi boilers. They are

Navien UK is excited to attend InstallerSHOW 2024 at the NEC in Birmingham! As part of our commitment to delivering