Both biomass and oil/gas boilers have their advantages. Here is a comparison:
Operating Cost
Biomass: -100/day | Oil/Gas: -300/day
Initial Investment
Biomass: Higher | Oil/Gas: Lower
Environmental Impact
Biomass: Carbon neutral, renewable | Oil/Gas: Fossil fuel
Maintenance
Biomass: More frequent cleaning | Oil/Gas: Less maintenance
Best For
Biomass: Wood factories, paper mills, areas with cheap biomass
Oil/Gas: Food processing, hospitals, areas with gas pipeline