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How Do You Measure The Power Output of a Wood Stove?

Wood stoves are usually measured in terms of the amount of BTUs they produce. In many cases, the stove manufacturer will label their stove based on the number of square feet it can heat. In general, you need about 3,000 BTUs of heat to warm every 100 square feet of interior living area. So, a 1,500 square foot home would want to source a cast iron wood stove that produced 45,000 BTUs of heat. With the proper sizing and energy-efficient home construction, cast iron wood stoves can effectively heat homes even in harsh winter climates.

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Does Heating With Wood Save Money?

Cast iron wood stoves can significantly reduce your yearly heating costs. Even homes in colder regions such as the northern US or Canada can often heat their home with only 3-4 cords of firewood each year. If you purchase this much firewood, you can expect to pay around $120-$180 per year per cord. In contrast, average annual heating costs are anywhere between $360 and $720. In areas like Minnesota, the average monthly heating bill can easily be between $200 and $400.

How To Heat With a Cast Iron Wood Stove

On the downside, learning to operate a cast iron wood stove properly can be a challenge. Unlike homes with HVAC units, heating your home with firewood and a cast iron wood stove takes a bit of practice and knowledge. You can't simply turn up your thermostat on a cold morning or trusting your programmable thermostat to have your home at a comfortable temperature when you return from work. A cast iron wood stove requires a basic knowledge of the best practices for burning firewood and the dedication and responsibility to check your stove every 4-8 hours to ensure that it has enough fuel.

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Vermont Castings Cast Iron Wood Stove
Photo Credit: Vermont Castings

Vermont Castings

The use of wood stoves is growing extremely fast in the Northeastern part of the country, and Vermont Castings is one of the leading manufacturers. They offer several models and sizes of wood stoves, both with and without catalytic converters. A unique aspect of these stoves is that they are designed to be loaded from the top, making it easier to stack and maintain a long-burning fire. In addition, their thermostatically controlled combustion chamber has a built-in thermostat that requires no electricity and automatically adjusts the air needed for combustion. The Encore Flexburn wood-burning stove allows you to achieve a 15% higher efficiency on low burns when burning with the catalyst converter. With the catalytic converter in use, the emissions associated with this wood stove are only 1.1 grams/hour (1.6 grams/hour without the converter in operation). This stove offers 47,000 BTUs/hour at maximum output and can heat homes anywhere between 900 and 2,300 square feet in size.

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Tobias Roberts

Rise Writer

Expert. Practical. Sustainable.

Article by

Tobias Roberts

Tobias runs an agroecology farm and a natural building collective in the mountains of El Salvador. He specializes in earthen construction methods and uses permaculture design methods to integrate structures into the sustainability of the landscape.

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