"Air heating" refers to the process of warming up the air in a specific space or area. It is usually done using a device or system that releases warm air to make the surroundings more comfortable or suitable for various purposes. Full definition
The forced air heat also should have a fan option for helping white out the noise. (trinidadretreats.com)
This is one example of a solar air heating collector using layers of black window screen that is inexpensive and fast to build and actually tested better than more expensive designs. (builditsolar.com)
Simple but good solar air heating collectors can be built for less than $ 4 per square foot. (builditsolar.com)