How a combi boiler works

A combi heats water straight from the mains when you open a tap. There is no tank or cylinder, so it frees up a cupboard.

How a system boiler works

A system boiler heats water and stores it in a cylinder. Several taps and showers can run at the same time without the flow dropping.

Which one we usually recommend

  1. Flats and homes with one bathroom suit a combi
  2. Homes with two or more bathrooms usually suit a system boiler
  3. Homes with low mains water pressure often need a cylinder

Get a proper survey

We visit, check your water pressure and flow, and talk through how your household uses hot water. Then we quote for the boiler that fits.