Oh and by the way Susan you don't have to own a truck mount to know you can't clean carpets etc with 300 °C
1. No one would be that stupid to try making a truck mount machine that can deliver temps of 300 °C for a start.
2. You would destroy the fabric/fibres of what you would be trying to clean as they would just melt.
3. It would be very unsafe to humans too so would be a bit of an H&S issue somewhat.
212 °F = 100 °C boiling point of water so do you get my drift now...Just admit you made a mistake

Regarding best truck mount you may find this vid interesting from a guy that knows a wee bit about truck mounts
https://www.youtube.com/watch?v=girHwhw76ZE