Answer: | TRUE - To understand WHY windows are "fogged", we must understand HOW windows are made. MOST modern windows have two glass panes (inside and outside) and a sandwich of gas (usually Argon) in the middle. The gas between the glass panes acts as an insulator which reduces heat (and sound) transfer . In order for windows to become "fogged" the seal holding the two glass panes break and the gas escapes. Once the seal is broken, ambient air (containing moisture and mineral contaminants) is introduced between the glass panes. The air between the glass panes heats and cools creating condensation. The condensation leaves mineral deposits, (such as calcium) which results in a film between the two glass panes. To eliminate the potential for broken seals and "fogged" windows some manufactures offer a single pane window. Modern single pane windows must meet the same energy efficiency rating as double pane windows, so they usually incorporate significantly thicker glass with a reflective coating. Older (pre 1970's) single pane windows are not as efficient as the modern single pane nor the standard double pane windows. With that long explanation of what causes fogged windows, we can answer the Question of the Week, a single pane window has no seals and insulating gas to fail - so they CAN NEVER become fogged. |
