What is HHO? Simply put 2 atoms of Hydrogen and 1 atom of Oxygen in a gaseous state. It had been discovered over 150 years ago and used during the Civil War by combining Iron filings [Fe] and Sulfuric acid [H2SO4] to produce hydrogen gas for tethered balloon observation posts. Dr. W.H. Rhodes designed and patented the first HHO gas welder back in 1966 even though Yule brown acquired the patent for HHO which is now commonly referred to as Browns Gas. There are many different names for HHO, such as hydroxy gas, Agua gas and other pet names. They all are pretty much the same thing except for their types. There is Sub-Monotomic HHO and Sub-Diatomic HHO. Dai is almost twice as powerful as mono because it has the extra molecule which releases additional energy when consumed. You shouldn’t store HHO in its combined state. It is very volatile, dangerous and unstable in nature. But when used in small on-demand criteria volumes it is very useful and acceptable for consumer use.