Dru is one of the oldest industrial companies in the Netherlands. It began in 1754 under the direction of local entrepreneurs and is now a Supplier to the Royal Dutch Court. Dru cast iron stoves combine Norwegian cast iron with combustion technology to give almost total combustion of wood, resulting in less wood consumption. The optional coal funnel feeds the coal automatically into the burning chamber. This type of operation allows for many hours of ‘continuous’ burning, with the process controlled by an adjustable thermostat.