I purchased the Vortex solar panels from you 2 years ago, mounted them on the roof of my indoor pool, and absolutely love them. They work great! This system has kept my 18 x 36 pool within 4 to 5 degrees of the outside air temperature just like you promised. I haven't spent a dime on fuel to heat the water in my pool in 2 years. The only maintenance has been an occassional re-tightening of the hose clamps between panels. Thanks for helping me get up and running.
John Brinkerhoff, Kentucky