If you’ve been reading about Home Energy Audits, you’ve probably seen a thermographic picture of a home. These color pictures show temperature differences. The windows show up as white or red, the walls show a darker color. They’ve even been part of some TV Commercials.
Earlier this month the National Standard for Thermographic Imaging was published. The purpose of a national standard is to enable two different energy auditors to obtain valid results with the camera on the same building.
The use of a difference in temperature to show where a house is loosing energy is very interesting. It can be skewed, if the picture is not, taken with a proper understanding of the limitations and potential external causes of temperature changes. Wind can cause a change in the temperature difference. Is the wind blowing from the East and you are taking a picture of the North wall, so some of the temperature difference is blown away. If the wind is from the south, is the difference increased?
The answers to these and other questions will be revealed for me this week. I will be in Manhattan at the Kansas Building Science Institute, working on my certification as a Level 1 Thermographer.
I will try to post some information during the class, so you can follow along my journey.