Draft inducing fans can be invaluable for chimneys/flues with unsolvable draft problems. They instantly solve draft issues by mechanically ensuring draft. The fans are easy to use and virtually maintenance free. They can be used with wood or gas fireplaces as well as coal and oil fueled appliances. The fan duplicates as a ventilator: simply turn it on to rid your home of stale air and cigarette smoke. They can be controlled by wall switches mounted near the fireplace or by remote control.
There are many different sizes and brands available depending on application.