Grow Room VPD humidity question

[Mañ'O'Green]

I did that. my leaf temp is +1 in most places and +2 in a couple. the chart still lists a rh of 70% at 73 degrees. Far above what others state.

That is not usual. Leaf temperature is usually 3° - 5° LOWER than the ambient temperature? This would indicate that your leaves are not transpiring which lowers the temperature of the leaf. This would seem to indicate that your humidity is either too high or way too low. I stopped using VPD as the application was too much work to keep in line. I just keep veg 50% - 60% and flower 40% - 50%.