to clean carpeting, they use a "carbonating" system which is a modified kleenrite extractor, with low vac performance and weak 60 psi pumps, there are 2 solution tanks, each containing a different solution -A and B, they mix just before hitting the carpet, causing carbonation, this system is used with either a standard wand or a modified RX20.
I have seen many better, more efficient, cheaper ways to clean carpets since leaving Chem-dry, but no better business system, or brand in the cc business.
In other words I have the opinion that they are the Mc donalds of our industry, you can all form your own opinon from that analogy, who here thinks Mc donalds make good food?