An apparatus for roasting and cooling loose products includes an oven with a housing including an upper and a lower section with glass doors. The apparatus has an air and a gas distribution grid connected to the upper and lower sections. In addition, the apparatus includes a high-pressure ventilator in the upper section having an outlet connected to the air duct, a rotor drum installed over the gas distribution grid, a feeding tray located in the upper section, a heater located in the lower section and configured to heat air and a hopper located on top of the housing above the rotor drum and configured to feed the loose products into the oven. The hopper includes one or more strain gauges configured to weigh the loose products. An opening located adjacent the hopper intakes fresh air intake and outtakes humidified air and a horizontal cooler chills the loose products.
