A regular boiler (also known as a conventional boiler or heat-only boiler) is ideal if the home already has a traditional hot water and heating system connected to a separate hot water cylinder. The boiler also requires a tank to store cold water, which feeds the hot water cylinder, and a tank to keep the central heating system's water level constant.
A system boiler requires a hot water cylinder for storage. However, the essential components of the system boiler are built into the boiler itself, saving time and effort during installation. They can supply hot water to an unlimited number of taps.
Important - Although the UK's Heat and Buildings Strategy is setting up the actions required to achieve zero carbon emissions by 2050, there are steps to be taken before that time comes. After 2025, gas boilers will no longer be installed in new homes but can still be installed/replaced in existing homes until 2035.
Despite the fact that domestic heating fuels contain gas, LPG, oil, biomass, electricity, and hydrogen, you should know that the next step affects fossil fuels. Fossil fuel heating installations will be phased out from 2026 in off-gas-grid homes, all remaining off-gas-grid non-domestic buildings, and from 2024 in off-gas-grid non-domestic buildings.