... boilerFlame and high temperature smoke produced by complete burning of fuel (coal, oil, gas, etc.) exchange heat with ... , hyperthermia bonding, dryingConstruction: highway hitumen, dissolving, thermal insulationCement: fuel heatingElectric: resin impregnation, melting&holdingAir-condition: radiant heatingOthers: different ... heat source below 350°C. horizontal oil fuel (gas) heating furnace