Masonry oven India, tandoors are traditional clay ovens, although these days modern electrically fired tandoors are available. The open-topped tandoor is a transitional design between the earth oven and the Roman-plan masonry oven. In the precolumbian Americas, similar ovens were often made of clay or adobe and are now referred to by the Spanish term "horno" (meaning "oven"). Horns are also traditional in the American Southwest. The traditional direct-fired masonry design is often called a "Roman" or "black" oven and dates in Western culture to at least the Roman Republic. It is known as a black oven because the fire generates soot
Ceramic Fuel Cells oxide fuel cell which creates electricity and heat by passing natural gas over ceramic fuel cells. BlueGen is 85% efficient and is reported to cut the average Australian home's annual carbon dioxide emissions by 18 tonnes. CFCL has signed agreements with leading European utility customers and appliance partners in Europe and Japan to deploy micro-CHP units using CFCL's SOFC technology. These agreements give the Company access to a number of large and advanced European markets for m-CHP units. The Company's utility partners in these markets have a total of more than 20 million gas and electricity customers. Ceramic Fuel Cells