Fast Fire II furnace is designed for processes ranging from thick film metallizing, sintering and brazing to electronics packaging and assembly and comes in five models. It is an advanced version of its original muffle-less design. Each model incorporates an advanced furnace control algorithm for precise and balanced temperature control, an improved drive system to ensure uniform belt tension and WINCON(r) oven control software. The furnace can reach 900 C (1650 F) from ambient in less than 20 minutes. For processes requiring Nitrogen atmosphere, a gas-tight version is available that incorporates curtains at the entrance and exit to segregate room air from the Nitrogen atmosphere in the gas chamber.