In Bardstown Kentucky, United States one of the local Distilleries installed our AFER Fuel Savers on three boilers and after a very short period of time you can actually see the change in the colour of the flame. The flame went from a low blue colour to a rich blue colour showing a hotter and cleaner burn. This in turn heats the area quicker therefore using less fuel and to not a lot cleaner allowing less Carbon Monoxide into our environment.