... reduce coal consumption more than 45% than air-heating. ♥ High-efficency: to improve the heating area 40% to keep a stable temperature ... safety. ♥ Specification: 50,000/100,000/400,000 kcal/hr ♥ Heating area: 300/600/1200/1800 ♥ Adopt Micro and Nano coating ... of coal. ♥ The air-heater, which applys the latest indirect heating technology , combines the function of combustion and heat exchange which ...