Stoves have been around in southern Europe since the Middle Ages, but in 1776 was refined furnace technology in Sweden into what it is today. During 1880, the stove had a special and not very long lasting application, namely the fuel-driven heater fan. Outdoor air was taken into the bottom of the oven and released as heated fresh air into the stove top. Gas fumes were taken out of the chimney, which created a vacuum that drew out the room air. The warmth of the stove ran thus both supply and exhaust air.
January 13, 2016