Here's a link for a company with 20+ years EXP. http://www.radiantec.com/index.php?gclid=CJvrv7fs5pwCFQxM5QodaV3DHg & here's an idea worth looking at with energy credits from local, state & federal credits. http://www.sunmaxxsolar.com/evacuated-tube-solar-collectors.php Outlet temps of 130 F...