If you look for solar heaters on the internet, specifically Youtube, you will see several designs that basically work the same way using aluminum soft drinks or beer can lids to absorb the sun's light to transfer into hot air. Instead of aluminum can lids, my design incorporated standard non-perforated sewer line for my heater.
I need to something light and already black and empty to allow free airflow through my solar air heat system. Although I had to paint the inside of the box, I did so don't have to worry about drilling, priming and painting the aluminum can lids that other designs needed.
Each unit I found used the same principal; build an enclosed box with a glass front, fill it with aluminum can lids, paint it black اتصالات نیوفلکس. Once the cold air enters the bottom of the box, it travels upward through the airspace toward the top. On the way, the light coming through the glass begins to lift the air temperature. As the air gets hot, it gets lighter and rises upward toward an exit hole to be piped in through the window.
It was easy and because I used recycled materials it was relatively cheap. I made the whole thing relating to 3 bucks and because it is portable, I can use it for my window heating system or as a way to heat my bucket garden green house.
In conclusion, the use of sewer line for my heater seemed to work through well. When i tested it, I could see about a 30 degree rise in temperature from the exit line after about 5 minutes in the sun.