10 Zone Reflow Oven has a Process length of over 5 meters The completely re-engineered HOTFLOW 320 reflow oven has been designed to deliver the BEST in CLASS results for ALL AREAS that ultimately affect the bottom line profit per PCB. The days of investing in just any reflow oven that has the number of heating zones required are over. Today, the economical aspects and true performance of the oven must play a major role in the decision making process.