Bosch is a world brand, famous for quality and reliability. Their specialist Bosch tankless water heater range carries all the hallmarks of long lasting well built equipment - exactly what you would expect from this company.
Their Aquastar range of gas tankless water heaters are expected to last at twenty years - not bad compared to the replacement schedule for a water tank which is about every ten to fifteen years.
The great thing about heating water instantly, like the Bosch tankless range does, is that you can make the heating unit really compact. In fact the Aquastar 125 series would snuggle into your average briefcase. How about that for small and lightweight?
What this means of course is that they becomes sensible on demand hot water heaters for semi permanent water heating needs - when you've got a hunting camp set up, in a mobile home, on the farm...
The smallest of the units are only designed for a single application. This means you could not run a dishwasher and take a shower simultaneously (though you could do it one at a time). Staying within the range, the 240FX - still lightweight and compact - allows for two big applications at once.
If you want to go for gas tankless water heaters and have bigger needs, do not despair - there will be a heater to meet your needs!