The Simplest Way to Add Supplemental Solar Heat to Your South-Facing Room in Winter: Testing Solar Thermal Effect of Air Filter and Window Curtains After Being Painted Black

The title explains everything. I give the links to the air filter and paint I used below. I used this air filter made of fiber glass that I bought from HomeDepot (production link provided): I spayed both the air filter and hanging curtains black using Rust-Oleum High Heat Paint that Read more…