incoming and outgoing heat is reduced. Hence, less energy is required to heat or cool down the place.
There are other advantages, like it provides sound insulation, safety, reduced damage to the furniture, etc.
When to replace double glazed windows
How To Make Double Glazing Windows Look Good
some just don’t seem to go with the rest of the exterior and some just, well could look better. A few simple tricks and your double glazed windows can look fresh and up to the minute.