I been using mine for a couple of months l5 ain't in same league a 19kg bottle lasted 4 weeks
you need a hot wash frank ya dirty bugger, last time i saw you, you pen and inked a bit mate
so also ok using the 1 heater for two men ok.is this run it though two pumps or just one. has i have two man setup ie 2 pumps 2 hose reels
ive only used mine 3 times in 2 months on 1st cleans, takes a while to heat up, bit of a nightmare with 2 people getting settings right, i really need to rig up a vent for mine, i would recommend one for the price.