The Bosch 17e is a continuous flow hot water system that heats water only as required. The Bosch 17e has a 5.66 star energy rating and offers an efficient alternative to the traditional gas and electric storage units. The Bosch 17e has all the standard features of the Bosch Highflow range including external installation, electronic ignition, antifrost as well as the ability to use temperature controllers.

Suitable for homes with 1 to 2 bathrooms, the Bosch 21e is a continuous flow hot water system. The Bosch 21e only heats water as required saving money and providing an efficient alternative to the traditional gas and electric storage units. The Bosch 21e has an impressive 5.56 star energy rating and offers 17 litres of hot water per minute. The Bosch 21e has all the standard features of the Bosch Highflow range like 3 years parts and labour warranty, 10 years heat exchanger warranty, electronic ignition, antifrost and the ability to use temperature controllers.

Suitable for homes with 2 to 3 bathrooms, the Bosch 26e provides 26 litres of continuous hot water. The most effective way to use any of the Highflow range is with a temperature controller. The Bosch 26e also comes with the Bosch Highflow 3 year warranty on parts and labour as well as a 10 year warranty on the heat exchanger.

The Bosch 26eco+ is a fully-condensing gas hot water system. The Bosch 26eco+ appliance offers high-efficiency for homes with 2 to 3 bathrooms. A fully-condensing system is unlike traditional hot water systems. The Bosch 26eco+ condensing unit captures heat from the exhaust gas and uses it to preheat the incoming cold water. This condensing system makes the Bosch 26eco+ one of the most energy efficient gas hot water systems available.