Based on lab conditions in a 10 hour day in Florida, using a 4' by 10' panel, 814 BTUs per square foot were produced.

Based on these results, heating a properly sized system would vary by less than one-half degree with any of our competitors. We sacrificed a minimal amount of performance in exchange for a panel that is far more durable and easily repaired while withstanding Canadian winters and Texan summers with ease for more than 15 years.