ELI5: Explain Like I'm 5

Outdoor wood-fired boiler

An outdoor wood-fired boiler is a heating system that uses wood to generate heat and hot water. The boiler is located outside your house, usually in your backyard or near an outdoor structure like a garage or barn. The wood is burned in the boiler to create smoke and heat, which is then circulated inside your home through a series of pipes. This type of system is very efficient because it is able to capture and use most of the heat from the burning wood. Outdoor wood-fired boilers are a great way to heat your home if you have access to wood, since it is a renewable resource.