The Ravel 600 BF is a new product designed to operate in buildings without chimneys or flues. This product follows in the footsteps of extremely successful sister model the Ravel 600 (conventional flue). The Ravel 600BF incorporates all of the features available on other Ravel products including underlog burner technology, turndown function allowing the rear burners to be turned off to retain flame picture on low and a reliable and easy to use slide control system.