Ginkgo G22 Continuous Flow Gas Water Heater

Yes — the G22 is designed for one to two bathroom households. A single shower draws roughly 8–12 L/min depending on the shower head, and a kitchen or laundry tap adds around 4–6 L/min, so 22 L/min covers a shower and a tap running together with room to spare. If your household regularly runs two showers at once, or you have a large family, step up to the G26.

It uses the same core engineering. The G22 shares the oxygen-free copper heat exchanger, the microcomputer burner modulation, the precision flow sensors, the 10-year heat exchanger warranty, the flame failure and over-temperature cut-offs, and the IPX4 weatherproof casing with the larger G26 and G30. What changes with size is flow rate and gas input, not the safety or the build quality.

NOx (nitrogen oxides) is a by-product of gas combustion. Lower-NOx burners produce fewer nitrogen oxides per megajoule of gas burned, which matters for air quality on dense streets and in areas with environmental conditions. For the household, the practical effect is a burner that meets stricter emissions requirements while still delivering the same 6-star efficiency and 22 L/min output.

GasMark is the Australian certification mark administered by IAPMO, and it means the gas appliance has been independently tested and certified to the relevant Australian and New Zealand safety standards covering gas safety, electrical safety and thermal performance. Combined with lead-free WaterMark and AS/NZS plumbing approval, it gives you the three approvals a gas water heater needs to be lawfully installed in Australia.

Very likely. At 571 mm high × 394 mm wide × 166 mm deep and 19.3 kg, the G22 is a slim wall-mount unit with 3/4-inch threaded connections — the same size pipework most existing installations already have. The main change is that you no longer need a concrete base, a relocatable pipework run or the space a storage cylinder occupied, so many installs are actually simpler than the replacement they replace.

For a small home, a storage tank is particularly wasteful: you are paying to keep a large volume of water hot around the clock, and in a compact space the tank itself takes up a disproportionate share of your outdoor area. A continuous flow unit heats water only on demand, so there is no standby loss, no cold run-out, and it frees up the space.

For a straightforward replacement of an existing unit where 3/4-inch connections are already in place, most licensed gas fitters complete the swap in a few hours. Removing a storage tank often makes the job quicker, because there is no cylinder to drain and dispose of and no relocatable pipework to re-run.

Yes. Integrated anti-freeze heating modules protect the internal pipework from frost, and the IPX4 weatherproof casing is built for permanent outdoor wall mounting. As with any outdoor water heater, correct installation and commissioning by a licensed gas fitter is what makes the frost protection work as intended.