Jokes aside, this was exactly what I was looking for but could NOT find at my local hardware store. It fits snugly in a standard 4 inch duct and prevents outside air from flowing back into the house through the dryer. The first winter when we bought our house, it was always cold in the dryer. So I had to replace the outside hood, but I took it a step further by adding a check valve inside the house to create a small pocket of insulating air. Check out the photos I have attached of the installed item in the closed and open positions and a video of it in action. Hooray!
📏 Johnson Level and Tool 400EM-S 12-Inch Heavy Duty Metal Combination Square for Professionals, with Inch/Metric Measurements, Silver - 1 Square
8 Review
Kapro - 353 Professional Ledge-It Try & Mitre Square - For Leveling And Measuring - Features Stainless Steel Blade, Retractable Ledge, And Etched Ruler Markings - 12 Inch
23 Review
Kapro 307-08-TMS Try And Mitre Layout And Marking Square With Stainless Steel Blade, 8-Inch Length
18 Review
Triangle Group TR918 225/45 R18 95V summer
61 Review