Seattle residents have a couple incentives available to them for purchasing a 95 percent efficient furnace. Puget Sound Energy offers $2,500 rebates to homeowners for converting to a natural gas home heating unit. however, if you're upgrading your already existing natural gas unit, you may be eligible for a $100 rebate. PSE also offers $1,000 rebates for switching from a forced air furnace to an air source heat pump along with several other rebates.

The other incentive is a federal energy efficiency income tax credit for primary U.S. homeowners who install a 95 percent efficient furnace. The credit is equal to 30 percent of the installation and equipment costs for up to $1,500.