|
Free Fuel, Forever |
|
Freefuelforever.com |
|
U-Tube Solar Collectors |
|
E-mail: info@freefuelforever.com
|
|
1.5 meter tube collector with last vacuum tube removed to show bottom of copper U-pipe and aluminum heat fin. |
|
Free Fuel, Forever |
|
Freefuelforever.com |
|
U-Tube Solar Collectors |
|
E-mail: info@freefuelforever.com
|
|
1.5 meter tube collector with last vacuum tube removed to show bottom of copper U-pipe and aluminum heat fin. |