How many square foot heat a furnace with 15kw strips?

A 15 kW electric furnace can typically heat around 1,500 to 2,000 square feet, depending on factors such as insulation, ceiling height, and climate. Generally, a rule of thumb is that 1 kW can heat approximately 100 to 130 square feet. To get a more precise estimate, consider local conditions and the specific layout of the space being heated.