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Is It Legal to Install Wood-Fired Heaters in All States?

April 6, 2026

Quick Answer

It is not legal to install wood-fired heaters in all states due to air quality, emissions, and local regulations.

Wood-Fired Water Heater Laws and Regulations

The legality of wood-fired heaters varies by state and sometimes even by local jurisdiction. While some states allow wood-fired water heaters, others have strict regulations or bans. For example, California and Oregon have strict air quality regulations that make it difficult to install wood-fired heaters, while states like Montana and Wyoming have more lenient laws.

Types of Wood-Fired Water Heaters

There are several types of wood-fired water heaters, including thermosiphon systems, stove coils, and batch heaters. Thermosiphon systems use a combination of gravity and convection to circulate water through a wood-fired boiler, while stove coils use a coil to heat water directly from a wood-fired stove. Batch heaters involve heating a large batch of water at once and then storing it for later use.

DIY Hot Water Considerations

For those looking to install a wood-fired water heater, it’s essential to consider the size of the system, the type of fuel used, and the local regulations. A well-designed system can provide efficient and effective hot water, but a poorly designed system can lead to safety issues and environmental problems. A good rule of thumb is to size the system according to the number of people in the household and the amount of hot water needed. For example, a family of four may require a system that can produce 30-40 gallons of hot water per day.

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