People ask for Low-E windows, but the term is a bit vague at best. “Low-E” literally means low emissivity, which in turn means a surface that emits low levels of radiant heat. All surfaces reflect, absorb, and transmit heat. So, a Low-E coating reduces the amount of that heat transfer.
Argon gas windows feature a sealed unit that is filled with gas between panes of glass to increase energy efficiency. Argon is an inexpensive, non-toxic, odorless gas that is used on residential windows to prevent frost from occurring at the bottom of window and at the same time will increase sound proofing characteristics of the window. .Argon-filled windows are becoming an increasingly popular choice for many homeowners.