Wesman Group offers Excess Air Burners with Preheated Air Suitability 320 Deg C. Wesman Group is an ISO 9001:2000 registered organisation. The Excess Air Burners with Preheated Air Suitability 320 Deg C are applicable in heat treatment furnaces, non-ferrous melting furnaces, kilns, ovens, air heaters, dryers, chemical processing plants.