Wood boilers are generally designed to be placed outdoors, which can free space within the home in comparison to gas boilers. In addition, those who own enough forested land can have effectively free heating fuel.
Wood boilers also don't need a gas line to work, which makes them a popular option in rural areas where the cost of transporting bottled fuel can be high. Their simple design also makes them a bit easy to troubleshoot if users run into trouble. Homeowners with access to a gas line may save money by using a gas furnace or boiler instead of purchasing wood. Furthermore, many areas prohibit the installation of wood burners due to the particulate matter they release.