Patent ID: 7891154

Claim:
A refrigeration door having an outer surface and adapted to be mounted on a refrigerating compartment, said door comprising: an insulating glass unit, comprising: a first sheet of glass; a second sheet of glass; a first sealant assembly disposed around the periphery of said first sheet of glass and said second sheet of glass for maintaining said first sheet and said second sheet in spaced-apart relationship from each other; a first low emissivity coating adjacent a surface of said first sheet or said second sheet of glass; and an anti-fog or anti-frost coating adjacent a surface of at least one of said sheets of glass; and a frame secured around the periphery of said insulating glass unit, wherein the surface having the anti-fog or anti-frost coating thereon is treated, prior to application of the anti-fog or anti-frost coating, with a solution comprising a first silane, and said anti-fog or anti-frost coating comprises a second silane, which second silane is different than the first silane, and said door has a U value substantially equal to or less than 0.2 BTU/hr-sq ft-F or an emissivity substantially equal to or less than 0.04.