Cooling Tubes

   On Friday, we placed the cooling tubes onto a couple of filled tires of the 2nd course, so that they will be sticking out the 3rd course.  Then Chad's dad arrived with a tractor and he and Ryan Walczak backfilled the cooling tube trenches.

     The five 40-ft cooling tubes will allow air to naturally flow from outside though the cool underground and into our house like air conditioning in the summer.  In the winter, we'll be able to seal and insulate where the vents enter the house.
     Here is a video of Michael Reynolds, the architect/"biotect" who created the earthship, explaining this process: