Biomass boilers are sometimes co-fired with natural gas or fuel oil for either flame stabilization and/or emissions reductions. Biomass boilers are typically rated in tons per hour or tons per day of fuel consumption, in addition to boiler horse power output or thousands of pounds of steam per hour output.
A biomass boiler might simply be too big for your home, but smaller standalone wood burning stoves are also available, which are normally used to heat one room by burning logs or waste wood. These wood burning stoves can be fitted with a back boiler that uses the heat produced when the wood is combusted to heat water, that can then be used for
Biomass boilers require maintenance – they need to be feed fuel and cleared of ash on a regular basis. They require a greater amount of room since the units are not only bigger, you also need to store the fuel somewhere close to the boiler. Cost. A biomass boiler might cost £7000, while a gas boiler might cost just £2500.
Energies biomass facility (link) at the Domtar paper mill in Rothschild, WI, provides an example of how biomass and fossil fuel carbon emissions compare. The mill has proposed to install a new natural gas boiler alongside a new biomass boiler, and presented carbon emission numbers for both. The relevant sections of the permit are shown
NORITZ Indoor Residential Condensing Natural Gas Wall Mounted Combination Boiler and Tankless Hot Water Heater - 180,000 BTU/H Model# CB180-DV-NG View the Nortiz Tankless Water Heater Collection
Because a boiler is a relatively simple technology, little gas cleaning is required (only water and particle removal), and capital and operational costs are kept to a minimum. Because biogas has a lower calorific value than natural gas (due to the presence of CO 2), boiler efficiencies are usually lower than can be obtained in a natural gas