What Are BTU Ratings for Firewood?


Quick Answer

British Thermal Unit ratings are units of measure used to determine the heat of combustion of firewood. These numbers are a rough comparison of different types of firewood and depend on the species of tree, its burn and the season.

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Full Answer

The combustion of firewood is measured in millions of BTUs per cord, where each cord is a stack of firewood 8 feet long, 4 feet wide and 4 feet high. Apart from the type of wood, its moisture content determines its heating capabilities. BTU charts provide a comparison of different types of firewood to aid in making the right choice.

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