... house 3) Coal as fuel Name:9RFL-20D Air HeaterScope: Used in livestock and Poultry house, greenhouse ... material.Component: Body of furnace, air inlet, air outlet, furnace gate, ventilator, air blower, chimney.Features:1. It ... the advantages of rapid providing of clean hot air efficiently;2. Second burning technology is adopted in ... automatic and manual temperature control. Coal-fired Air Heater 9RFL-20D