It is the sole responsibility of the purchaser to check for and comply with any local or national standards or restriction as they pertain to the installation of outdoor heaters. Under no circumstances will the selling agent issue any refund or exchanges if the location or installation does not comply with these local or national standards. Please do your research before specifying, purchasing, or installing our products. All Infrared Dynamics, Inc. products comply with or exceed the recognized ANSI Z83.26 Standard for Gas-fired outdoor infrared patio heaters.