If you’ve noticed fog or condensation building up between the panes of your windows, it’s likely a sign that the sealed unit has failed. This not only impacts the clarity of your view but also reduces the energy efficiency of your home. At PNR Windows & Screens , we specialize in sealed unit replacement in North Saanich , helping homeowners restore comfort, efficiency, and clarity to their windows without needing full window replacements. What Is a Sealed Unit? A sealed unit, also known as an insulated glass unit (IGU), consists of two or more panes of glass separated by a spacer and sealed to form a single unit. The space between the panes is often filled with inert gas like argon, which enhances insulation. These units are designed to reduce heat transfer, block UV rays, and provide sound insulation. However, over time, moisture can breach the seal due to weather exposure, age, or manufacturing defects, leading to condensation and fogging. When this happens, the un...