The Nestor Martin R33 is a contemporary style stove that has all the advanced technology that you would expectfrom a modern stove. The R33 comes in two different finishes, grey alumat or cast black. It is designed to burn seasoned wood or smokeless coal. The R33 has a heat output of 8KW, and has an efficiency rating of 72% gross. The door is sealed with manufacturer’s own hollow ceramic rope seal.