For those who doubt hot i will give you a comparison from today.
2 x vivaros. one with a cold system and one with a hot.
hot system had been drained and fired up straight away and worked fine
cold system had been drained and wouldn't work. i thought that even if it did get going it wouldn't work for long as its -3
i spoke with another local window cleaner to see how he was getting on as he was out with his cold system. he didn't get to do one house as his water had froze.
My hot system has been out working all day and will get a full days work in.
So the moral of the story is 4 more days like this the hot system would of paid for itself
I'm so glad i got it