As someone who just started using a ProProducts RHP in an AP T10 this week, I would strongly advise taking your time in recording temps in all areas of the enclosure. You may also want to experiment with the TSTAT probe on both the cool and RHP side and see what works best. I was convinced the the cool side was the way to go until I started to get some extreme fluctuations on the hot side. I think this was due to moving my enclosures closer to a wall mounted heating unit so I switched the probe to under the RHP and it's working much better now. Good luck!