Derek
You fallen into the trap set by those that suggest if you have a Scorpion then you MUST be cleaning carpets with cold water as the Scorp does not have an heater.
There a more then a few portables that are not supplied with a heater - so the Scorpion is not an exception.
And has been said many times you just plug an inline heater and away you go.
Ever seen the adverts where people are wanting, or selling inline heaters - Ashbys and Prochem heaters spring to mind.
Dont forget the Scorpion is capable of cleaning carpets 150' away, so an inline heater can be plumbed into the solution line say in the last 25' so the heat is where you want it - at the wand. Works out to be an advantage at times, not having an onboard heater.