As I am researching which gasifier to buy I found some vidoes on you tube of people using a garn boiler. Both videos show a boiler that looks like its the size of a walk in freeezer. Both people had a seperate garage/house that housed the unit. The units were built into a wall or some kind of box structure. Is this really the case, are these are garn boilers that big, or did I come across the largest ones they make?