Biomass Boilers: Biofuel As Power Plant Energy Source : Biomass Boilers, biomass heating systems, burn biofuel (generally called as biomass fuel). Biofuels are cheaper than electricity, petroleum oil, or natural gases. Biomass boilers are ideal for year-round heating requirements & hot water needs. Biofuel: Biomass as a Boiler Fuel is cheaper and around 60% efficient fuel.