How many square feet does a 1500 BTU heater heat?

A 1500 BTU heater typically heats an area of about 150 to 300 square feet, depending on factors such as insulation, ceiling height, and the climate of the space. In well-insulated areas, it may effectively heat closer to 300 square feet, while in less insulated spaces, the coverage may be closer to 150 square feet. Always consider these variables for optimal heating efficiency.