Ruskin Commercial Air Doors models ACC and ACCEH protect against undesirable environments around door openings. Designed to keep dirt, dust, fumes, insects, and pollen outside, the Ruskin air doors help maintain a cleaner and healthier indoor environments. Ruskin ACCEH models offer electric heaters to provide instantaneous comfort in cold weather applications. Available in many heater ranges, the ACCEH works well in any climate. The ACCEH units come complete with factory mounted control box with thermostat. Both the Ruskin ACC and ACCEH Air Doors include an industry’s best 5-Year warranty on the entire assembly.