The new stimulus bill now provides homeowners up to a $1500 credit on upgrades/additions to your heating and cooling system.  This is a great way to enjoy a healthier, quieter home, at up to a 30% savings! Not to mention the impact it will have every month on lower utility bills.  For more details, go to Energy Star's website. http://www.energystar.gov/index.cfm?c=products.pr_tax_credits