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Bosch External HydroPower
16H
The Bosch 16H delivers a 16 L/min flow rate and is available in Natural or LP Gas. It is suitable for 1-2 bathroom homes and conveniently provides continuous hot water without a powerpoint or a standing pilot light.

HydroPower ignition – heats water only when required
Continuous flow technology
Delivers 16 L/min at a 25°C temperature rise
External installation
No electricity or standing pilot light required
Energy efficient
Simple installation
Comprehensive warranties

https://www.bosch-climate.co.nz/products-bosch-hot-water/hot-water-systems/domestic/external-hydropower/bosch-16h.html