What is the input and output energy for the wood fire?

The input energy for a wood fire comes from the chemical potential energy stored in the wood, which is released during combustion. When the wood burns, it combines with oxygen in the air, producing heat and light as output energy. This output energy can be measured in terms of heat, which warms the surrounding environment, and light, which provides illumination. Additionally, byproducts such as smoke and ash are produced during the combustion process.