Here are some further tips on choosing contractors:

• Ask neighbors and friends if they have worked with a contractor they would recommend
• Focus on local companies
• Look for licensed, insured contractors
• Ask about previous experience
• Check references
• Inquire with the Better Business Bureau.

Use these methods to select several contractors, then get at least three detailed, written bids. Each bid should include an agreement to provide written calculations (listing the procedures and standards that will be followed), equipment and installation warranties, a payment schedule, and a firm completion date. Avoid making your decision solely on the basis of price. The quality of the installation should be your highest priority, because quality will determine energy cost, comfort, and durability.

Source: EERE, U.S. Department of Energy

Start saving with a home energy audit. An audit is like taking your home’s temperature. It can help you find out where you’re wasting energy and check how well your heating and cooling systems work. You can use the do-it-yourself energy audit tool on the Department of Energy website at hes.lbl.gov. Check with your power company to see if they offer free or low-cost audits. If you want a more comprehensive audit, you can hire a specialist.