This is all nice if someone could make this tube design cheaply. Most DIY people would not have these laying around usually and they probably would not be available at a home-improvement store either. They also would be a relatively high value as compared to using soda cans, still in either case the result is free/cheap heat from the Sun. Backup heating systems are still needed in a dwelling. Some of the std. heating fuel you save in reserve, by using a solar air heater to conserve fuel, can be utilized later when needed. Don’t forget the possibilities of solar water heating, solar water heating to heated air conversion, and solar electricity.
Established in year 2009,Bossen specializes in various kinds of steel pipes and steel concerned building materials. With an experienced, dynamic and high efficient team, our products are well-received worldwide.