... exhaust from the back, with an environmental protection cabinet.Intake air fan capacity:Two PCS of centrifugal fans with 4.0kw, air volume ... of 35,000 m³/hExhaust fan:One PCS double inlet air centrifugal fan with 5.5kw, air volume 20000 m³/h ... heating productivity: 200000 Kcal / h, stainless steel heat exchanger, with anti-explosion hole for protection , working temperature: 60°C,electric ...