In the Scorpion manual there is a temerature restriction to 70 degrees/c as any higher can deform pump valves. I've tried drop in Element pain in the butt.
I use my Aqua 40 as a tank, heat 40 litres of water to 65 degrees/c and then the Scorpion has drop hoses that I place in the tank, I use it like this on the van.
For extra heat away from the pump I had a 2kw inline heater but it melted.
Alltec now do the Advance on special order £2500 with the vat (machine only), 3x3stage vac in parallel ,600psi pump 3kw heater. you would have to heat water first so not to blow customers consumer unit or go on seperate ring main.
Regards Rob