Insulation: AC Air Intake Box
My air intake box has a little spray foam around it, however it doesn't look like much. I plan to insulate the box with at least R5 and I may add R2 around the ducts. Image 1 We can see from the image that I am losing heat. Image 2 I estimated it's R Value to be around R0.1, which is terrible. It drops by roof from R5 to R3. As such I've put R5 around it.