A regular boiler, often known as a conventional boiler, uses gas or oil to heat water that is then distributed throughout the house. A biomass boiler, on the other hand, uses organic material such as wood pellets, chips, or logs as fuel. The biggest difference between these two types of boilers is the fuel source used. While regular boilers use non-renewable fossil fuels, biomass boilers use renewable sources, making them a more environmentally-friendly option.
Biomass boilers are typically more expensive to install than regular boilers, but they can be cheaper to run if you have a cheap, local source of biomass fuel. Additionally, some countries offer incentives for installing biomass boilers due to their green credentials, which can help offset the higher upfront cost. Regular boilers may be less expensive to install, but they can be more expensive to run and have a larger carbon footprint.