Low e or Low emissivity glass means it has a low emission coefficient of radiation. For an object that has no radiation, this coefficient is zero, and for an object that has a maximum radiant power like a black (ideal) object, it is one. The main difference between Low_e and ordinary glass is that Low_e glass has a very thin coating that is applied to one side of the glass. This reduces the transfer of heat or cold through the glass.
This type of Low_e glass is made by the top glass factories in two types of hard coating and soft coating and is provided to Asa Company.