I work all winter with it , luxury maybe but it makes a hard job easier.
As for cracking glass i have never done this but i don't have it running really hot i have warm water so that i can carry on working .It really is a case of trying and believing how much easier to work with hot(warm) is in the winter .
Note i say to( work with) not it does a better job as i can't say it does. But if you are warm you work quicker , umm i do anyway.
Gas 11kg last about 3 wks £18.00 i can live with that .
On gutters i turn the heat up and it does make a lovely job of them.And with that warm water running down your arms , you still get wet and cold lol