A 8GPM machine will do the trick (cold water). As for the steam hot washing you need temp not voume to do the work. For this a 3.5 -5.5 GPM will be more than you need. With the price of fuel you do not need to heat up 8gpm in order to wash. Simpilly have the 8gpm unit do most of the work and the hot unit for the touch ups.

In a perfect world you can order two high quality 5.5GPM units (cold) and one hot box. Using quick connects you could have a 11GPM unit or two wands at 5.5GPM cold or one hot or one cold. Hot boxes are the way to go expecially due to the fact when versatility is key. Plus they don't need to be on all the time like the skid mount units. To think even with a complete breakdown you will still have a machine up and running. Finally this way might be cheaper to price rather than a 8GPM hot unit.

Good luck

DAFF

DAFF MOBILE WASH
WINDSOR, ONTARIO CANADA
DAFFMOBILEWASH@AOL.COM