This tool focuses on the “Nighttime Heat Loss” problem. Windows are holes in your insulation bucket (R-2 vs R-20 walls). This tool demonstrates how a properly sealed DIY window quilt can turn a terrible window into a decent wall at night.
It features a “Convection Loop Visualizer” that shows why hanging a curtain without a top valence (pelmet) or side tracks is almost useless, as it creates a “cold air pump” that actively cools your room.
Window Quilt Simulator
Stop the “Cold Air Waterfall” with thermal curtains.
1. Window Setup
2. Installation Quality
The Convection Loop Trap
If you hang a curtain on a standard rod, air touches the cold glass, gets heavy, and drops out the bottom. This creates a vacuum that pulls warm ceiling air into the top. You have inadvertently built a cold air pump that circulates room air against the freezing glass all night.
To make a window quilt work, you must seal the edges. 1. Pelmet (Valance): A box at the top to stop air entry. 2. Tracks/Velcro: Seal the sides to the wall. 3. Sill Seal: Let the curtain rest on the sill or floor to stop air exit. This creates a “dead air space” which is an excellent insulator.