Attributes : The heating values provided by the heater unit of the above 2 rounds are 1450 for the engine speed and 900 rpm is reduced in the engine speed.The heating values provided by the ventilation steam unit heaters unit are based on 30PSI or (2 times) steam pressure, which will be less than 5PSI and 15PSI heating values.Sabalan Ventilation Vapor Heater Units have a copper or aluminum coil with a diameter of 8.5 inches and a flat type fin (FIN PLATE) with a density of 8 fins per inch.The coils of Sabalan Vapor Heaters Unit are hydrostatically tested after construction under 150PSI pressure (10 bar).