Beehive burner

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Beehive burner in Canada

A wood waste burner, known as a teepee burner or wigwam burner in the United States and a beehive burner in Canada, is a free-standing conical steel structure ranging from 30 to 60 feet in height. They are named for their resemblance to beehives, teepees or wigwams. A sawdust burner is cylindrical. They have an opening at the top that is covered with a steel grill or mesh.

Teepee or beehive burners are used to dispose of waste wood in logging yards and sawdust from sawmills by burning. As a result they produce a large quantity of smoke and ash which is vented directly into the atmosphere without any sort of scrubbing or cleaning, contributing to poor air conditions wherever they are used.^{[citation needed]} The burners are considered to be a major source of air pollution and are being phased out in most areas.^{[citation needed]}

Teepee burners went out of general use in the Northwestern United States in the early 1970s,^{[citation needed]} and are prohibited from operation in Oregon.^[1] The wood waste is now used as a component in various forest products, such as particle board and mulch.