Two traditional multi-fuel stoves have been introduced by Drugasar. The Dru 64 and 78 are Norwegian style stoves made from cast iron and are designed for burning wood, coke or coal. The stoves have a classic design, with a large, panoramic glass window. They are equipped with a ?triple burning? system which is designed to enable effective heating and high efficiency. The process employs primary air drawn from underneath the fire plate to start the burning process. This is followed by secondary air from the back, which fills the combustion chamber.