Choosing the right size wood cook stove or oven is key to efficient heating and energy savings. Typically categorized as SMALL, MEDIUM, or LARGE, SMALL models heat up to 1,500 sq. ft., MEDIUM models cover up to 2,500 sq. ft., and LARGE models are designed for homes over 2,500 sq. ft. Factors like firewood type, ceiling height, insulation, and room layout can affect heating performance, so selecting an EPA-certified stove that matches your space ensures the best results.