The IntensiFire fits inside your woodburner and changes the way it burns wood. Similar to syngas technology, or the way a car can run on woodgas, it breaks wood down into simple combustible gases that are then fully consumed by the super hot fire.
Complete combustion means less wasted heat up your flue, a lot less! The heat goes into your room instead and is like putting in a larger model woodburner.
This downdraft style of combustion is now seen in the all the new Ultra Low Emission Burners (ULEB) in New Zealand. This 2015 ULEB test is the toughest emissions to pass in the world because it includes start up, then wet wood, hardwood and softwood phases.
The IntensiFire is particularly useful for stoves that were not originally designed with secondary air, but even a lot of modern stoves will benefit from an increase in efficiency and emissions.