Three pass thermal oil heater. Horizontal design, vertical on request. Output range: from 116 to 5815 kW DIATHER’ is a thermarl oil heater, three pass. It can be operated with liquid or gaseous fuels. Design features: Coil: two concentric coils with bottom screen, inserted in the outer shell, hermetically sealed to the smokes, formed by drawn up pipes of seamless steel tubes type, wound in spiral, in quality steel of suitable thickness. Bottom: of the boiler body boiler, bolted, insulated and endowed with cleaning door and smoke chamber connection to the chimney. Furnace: with passing flame, accessible from the front door. Front door: is built in welded steel plate, of wide dimensions to facilitate the operations of maintenance, hinged, insulated with refractory material and endowed with flame sight glass and burner plate. Insulation: the shell is thermally insulated with a double layer of rock wool cladding, suitably supported and covered externally of aluminum. The base: is built with a steel frame. More details: https://www.unicalboiler.com/products/industrial-369/thermal-oil-heater/388/diather-