It is designed for low pressure. The high temperature output can reach up to 320^oC. Its system is within the low pressure which can be operated under a pressure-free circumstance and meet the safety requirement. Its adoption of German-made burner and temperature control products ensures precise temperature, avoiding energy accumulation. Therefore, no extra cooling system for air pre-heater is needed. Without the cooling system, the boiler efficiency can reach up to 90%. It is a ideal production equipment.