75 was his example WB temperature, the diagonal purple line, interpolated between 70 and 80. Plotting that line as it crosses the dry bulb temperature (vertical line at 95 degrees, allows you to then draw a horizontal line at that point, which is interpolating between 60 & 70, on the left, which is the dew point temp. But he explained it much simpler.
@ChrisHVAC For wet bulb, you start at the point on the chart (the green dot) and then follow the PURPLE lines up and to the left at a diagonal until you hit the curved line, then see where your number hits.
Another nice video man
Looks like Charlotte is at 65 not 75. What am I missing?
75 was his example WB temperature, the diagonal purple line, interpolated between 70 and 80. Plotting that line as it crosses the dry bulb temperature (vertical line at 95 degrees, allows you to then draw a horizontal line at that point, which is interpolating between 60 & 70, on the left, which is the dew point temp. But he explained it much simpler.
Good stuff. Thanks Tim.
@@ChrisHVAC 65 is the ashrae wb design temp for charlotte
@ChrisHVAC For wet bulb, you start at the point on the chart (the green dot) and then follow the PURPLE lines up and to the left at a diagonal until you hit the curved line, then see where your number hits.