What is a key characteristic of a combi boiler?

A combi boiler is specifically designed to heat water on demand, which sets it apart from other types of boilers that may store hot water or require additional storage solutions. This on-demand heating means that when a tap is turned on or a heating request is made, the boiler activates and heats water as it flows through the system, providing a continuous supply of hot water without the need for a storage tank.

This feature is particularly advantageous in homes with limited space, as there is no need for bulky storage tanks that are characteristic of traditional systems. Additionally, the efficiency of heating water only when needed helps to reduce energy costs, as water is not kept heated unnecessarily. Thus, the primary characteristic of a combi boiler is its ability to deliver hot water instantly and efficiently whenever needed.