 CleanSeal technology expertly seals air ducts and vents, boosting your home's comfort and cutting down those energy costs. Schedule today and feel the difference in every room. Plus, enjoy up to 30% back in tax rebates. Your ultimate home run in energy efficiency. For more information, Google and call HydroKleen Baltimore. It's not clean until it's HydroKleen. Dan owed an unbelievable amount of money to the IRS.