Paul,
We've got Dry Fusion.
Two things work in it's favour.
Firstly, the heat is produced on the machine and is thermostatically controlled (quite accurate). The source of heat is less than six inches above the carpets / tiles at all times. You can get up to 85 degrees, right where you need it constantly. You can then turn the heat down to say 65 deg. for polypropylene (to avoid scorching / friction damage). In other words, you are always in control.
You may find that a "hot" pad will not be half as hot after it has been used over 15-20 square metres, whereas with DF the heat is pretty constant.
Secondly, you have a selling advantage, especially with rest homes and kids' nurseries. There is the normal chemical, "Activator" that cleans, deodourises and stain blocks. Then there is a second one called "Bactoshield OV" which does all of that plus it applies an anti microbial treatment (full reports etc are provided when you buy the chemical). This gives you an advantage when quoting against others for those sort of jobs.
Garry