Can Heavenly Heat systems be used as primary heat ?

We offer indoor heating systems at 10, 12, 15 and 20 watts per square foot. Thereby we can customize a system that will perform in your specific application. Also our systems are 120 and 240 Volt thereby being able to cover large areas. Please note that our outdoor systems are 35 Watts per square foot and are 120 or 240 Volt.