The Franklin stove was a cast-iron stove with a closed firebox and a series of flues that allowed the smoke and hot air to circulate around the stove before being released through a chimney. The stove was typically square or rectangular in shape, with a flat top and a door on the front that allowed for easy access to the firebox. The Franklin stove was also equipped with a damper that could be used to control the airflow and heat output of the stove.