What is a Combination Boiler?
Combination, or Combi, boilers provide high efficiency space heating and domestic hot water (DHW) in a compact footprint that is easy to install and maintain.
When a hot water tap is opened, incoming water flows through the heat exchanger.
Heated boiler water, supplied from the fire tube heat exchanger, prioritizes heating the domestic water to the desired temperature.
When space heating is needed, a diverter valve directs the heated boiler water into the external space heating loop.