This is how I built my 3'x6' can solar heater
  The size was determined by the size of the plexiglass
I could find the day decided to try to build.

Materials
1  4'x8' sheet 3/8" exterior ply wood for the back
1  4'x8' sheet 5/8" exterior ply wood for sides
1  4'x8' sheet  1" foil backed insulation

2  tubes High temp silicone

4  cans high temp barbeque flat black spray paint
1  3'x6'  sheet 1/8" Plexiglass

 

 

Videos

Build a wind generator
    
Building the wind generator blades

Are you building green??? Video

Links

Cool tools to check your wind & solar projects

Wind Speed Indicators

Wind Blue Power

Pacwind Wind Turbine

Wind Resource Map