I installed my complete system for around $400, including the rental of a rotary hammer drill and a 5" coring bit from the Home Depot. Val made the process very easy, and helped me select a smaller fan than I would have purchased otherwise. This fan uses about 50% less power, but was sized just right for my smaller house. It took one solid day to get everything installed, and my radon level went from 9.9 to 0.4! I saved about $600 over paying a professional, and got great results. Thanks Val!