Message Board Thread - "Thermal Index & Efficiency of Walls and Windows"

Title	By	Posted On
Thermal Index & Efficiency of Walls and Windows	Mobius01	10/20/2011
Hi, My IR camera has a user input value for "Thermal Index" in %. I believe this represents to the efficiency of the exterior wall that you are inspecting for insulation problems (heat loss). So lets say, I am inspecting an exterior wall and I have set the value for thermal index of 80%, so the camera will be checking for the presence of 80% efficiency on the wall area? Is that what it means? I cant seem to find any info. on this function and this is what I figured it means. P.S Besides thermal index, I also need to enter the value for inside/outside temp along with RH value. Also, does anyone know what should be the efficiency (in %) for exterior wall and windows in extreme cold conditions? e.g is it 80% for walls and 20% for windows etc? Thanks
Re:Thermal Index & Efficiency of Walls and Windows	Mobius01	10/25/2011
Mobius01 wrote: IR camera has a user input value for "Thermal Index" in %. I believe this represents to the efficiency of the exterior wall that you are inspecting for insulation problems (heat loss). So lets say, I am inspecting an exterior wall and I have set the value for thermal index of 80%, so the camera will be checking for the presence of 80% efficiency on the wall area? Is that what it means? I cant seem to find any info. on this function and this is what I figured it means. P.S Besides thermal index, I also need to enter the value for inside/outside temp along with RH value. Also, does anyone know what should be the efficiency (in %) for exterior wall and windows in extreme cold conditions? e.g is it 80% for walls and 20% for windows etc? Thanks Actually I was able to find answers to my questions above. a) I was right about what Thermal Index means. b)For the coldest day in the winter, the efficiency of an exterior wall should be 75%.
Re:Thermal Index & Efficiency of Walls and Windows	Linas	10/26/2011
Thermal Index is the ratio of temperature drop across the building envelope, to the total temperature drop between inside and outside air: TI= [(Twall-Tout)/(Tin-Tout)]x100% Twall= The surface temperature of a properly insulated part of the wall. Tout= The localized outside air temperature measured by the user. Tin= The air temperature inside the structure measured by the user. Example: Twall=60F Tin=70F Tout=30F TI = [(60 - 30) / (70-30)] x 100 = 75%
Re:Thermal Index & Efficiency of Walls and Windows	Bob Berry	11/7/2011
This camera is not designed to be used with external images, it is intended to be used with internal images. Thermal imdex is valid where you have a continous conductive path only. If there is any air gap as part of the construction then it cannot be used.
Re:Thermal Index & Efficiency of Walls and Windows	Collin Stefani	1/30/2012
Linas wrote: Index is the ratio of temperature drop across the building envelope, to the total temperature drop between inside and outside air: TI= [(Twall-Tout)/(Tin-Tout)]x100% Twall= The surface temperature of a properly insulated part of the wall. Tout= The localized outside air temperature measured by the user. Tin= The air temperature inside the structure measured by the user. Example: Twall=60F Tin=70F Tout=30F TI = [(60 - 30) / (70-30)] x 100 = 75% Thank you so much for your post. __________________ [url=http://fullmoviesonlinefree.net/]Watch Red Tails Online for Free[/url]