Mean radiant temperature conditions. #MRT
If you’ve had the pleasure of working with an infrared camera, you know certain surfaces can’t be read accurately unless the emissivity settings are dialed in. Typically shiny surfaces are read wrong. As such, windows are typically looked at quickly and moved past. At least that’s what I did as an energy auditor.
HOWEVER, if you have a homeowner tagging along for the show, STOP! While the IR readings may not be accurate, the imagery is.
I’m pictured in both these images, dead center. What the image shows is my body’s heat being reflected back to the camera. And therein is the lesson for the home owner. Body heat compared to its surroundings.
Our bodies’ heat is much higher than the cold glass.
Temperature difference = heat transfer via radiation = comfort issues.
Giving them the chance to see themselves in the picture gives a relative scale for them. Not all home owners may be keen on discussing this concept and technical speak, but the ones that are will think about that every time they see themselves in the reflection of a window.
This conversation happened and was triggered by @northernbuiltpro
who is regularly snooping around houses hunting and solving problems. Give them a follow. He has a nicer IR camera and uses it far more than I do mine.
#meanradianttemperature #buildingscience #homeperformance #ir #infraredcamera #comfort #deltaT #temperaturedifference #radiation #heattransfer #thermalimaging #thermography #thermalmap