The basic principle behind this unit (Delta DS100) is manually cycled radiant heat intervals. It is basically a cigarette lighter with push button control. The other items for moisture removal are for the most part of the forced hot air/gas type and some chemicals may provide evaporative qualities but at the same time may cause a negative effecton the PVB. What ever you use I would exercise caution not to overheat the area and create a delamination issue.
I also use Delta's moisture removal tool and find it to be a great tool. As for any specific product specs I would contact Delta Kits.
There is one post that I know for sure is in the archives, not sure when it was posted though and it touched on various moistural removal systems. Might be under "moisture removal" or something similar.
I hope this was what you where looking for when you asked for pricipal.
Corrected part number Edited by: deltakits at: 7/30/03 1:01 am