i use gas set up, i was cold for a long time then went 2 years hot with my gas heater set up a few times this year i went back to cold just to see how i got on and it was a nite mare , bird cxxxp was taking to long to get off and fly cxxxxp was just not shifting , so my view is hot is beta for me working in my area on the coast, if i was inland working on a 4 weekly cleaning then hot would just be a luxury , but on the coast working on a 7 weekly its a must have you save on water as your cleaning quicker its that simple realy ,if any one once to trial hot just to see then a £200 gas set up is worth a punt if its then not for you its not a huge waste of money