50% of our intergas installs have had warranty calls within 2days.
Compare that to the hundreds of vaillants with as yet no issues.
The intergas isn't versitile or did something others can't
If you took the time to understand it you'd realise it can do a lot more than you think it can...unfortunately IG aren't very good at publicising this so you have to find out for yourself. As for your warranty issues, it sounds you've had a bad run for some reason, I've only ever had one need a call out