The Seek thermal camera for android is shipping:
http://ecorenovator.org/forum/tools/...id-phones.html
The Flir One for Iphone is only 50 dollars more.
Both of these little gadgets are super cheap for the potential energy and money you could save yourself. The cool thing is that instead of paying the same price for an auditor to come out for a few hours, you can just keep the device and use it over and over at your leisure. After a couple of minutes of use, these devices become easy (and fun) to use.