Hi I have just started doing home energy audits with Energy Star I charge $250.00 to $500.00. I am in the home at least 4 hours and do a follow up test after work has been done. IR camera is recommended $3,000.00 to $12,000.00. Blower Door kit, gas and Co analyser, software, and other things about $4,300.00. BPI training and certification is $1,200.00 last I looked, and a week out of town for classes. The test/certification is harder than I though it would be. That comes to over $10,000.00 no mater how you cut it. I don’t think you can do an energy audit with a large fan a smoke stick and stand behind it, although I may have thought that at first too. I give the client a est. on heating and cooling energy savings over a year, if they do the recommended work. We also give help with energy tax credit and rebates. A lot of new tax credit coming up in 2009 from Feds. https://www.energystar.gov/index.cfm?c= ... credits#s2