I recently retired from a career as a facilities engineer at a large hotel in Las Vegas. A couple of years ago, I acquired some shares of GDGI and I asked our A/C specialist about pre-cooling systems that spray a water mist in the air that goes into the condenser. He spoke about the resulting problem of scale buildup on the metallic surfaces of the condenser.
GDGI came up with a solution to this problem with its water treatment system, so the testing that has been going on is addressing both the % savings on electricity and the scaling issue. It takes time for perceptions to change in the business settings; once they do, there will be a 'snow-ball effect' that will probably increase the value of GDGI exponentially in the months to come.