TAKAGI 20L NG AU5 Continuous Flow Hot Water Heater Gas, Replace Rinnai Rheem DUX

Frequently Asked Questions

Is the Takagi 20L NG compatible with my existing hot water system in Australia?

Yes, the Takagi 20L NG is designed as a direct replacement for Rinnai, Rheem, DUX, and other major Australian brands. It connects via standard 1/2" BSP (15mm) cold and hot water connections and 3/4" BSP (20mm) gas inlet, which are the industry standard in Australia. It's also Watermark certified for compliance with Australian plumbing standards and has a gas approval certificate. Whether you're replacing an old unit or installing new, it'll integrate seamlessly with Australian plumbing systems.

Can I use this as a booster for my solar hot water system?

Absolutely. The Takagi 20L NG is specifically designed to work as a solar-compatible gas booster. When your solar panels aren't providing enough heat (like on cloudy days or winter), this heater kicks in to maintain your water temperature between 40-50°C (or up to 55°C with an optional remote controller). This combination gives you year-round hot water reliability while maximising your solar savings.

How much will this cost to run compared to my old hot water heater?

The Takagi 20L NG has a 6-star energy rating with 80.5% thermal efficiency, meaning it uses gas more efficiently than older models. With a nominal gas consumption of 160 MJ/h, you'll see genuine long-term savings on your gas bills compared to standard 3 or 4-star rated heaters. The exact savings depend on your usage and local gas rates, but the efficiency rating tells you this is among the best performers on the market.

What's included in the warranty, and does it cover me in regional Australia?

You get a solid 3-year replacement warranty covering the complete unit, plus a 10-year heat exchanger warranty for long-term peace of mind. However, warranty coverage is limited to Metro Melbourne and Metro Sydney regions only, so if you're outside these areas, check with Yarra Supply about your specific location before purchasing. When you buy from Yarra Supply, you'll also get Australia-wide free shipping and a 30-day returns policy if needed.

How is this unit different from the Eternity or Leda models I've seen?

The Takagi 20L NG is actually manufactured by Takagi in Japan—the same OEM factory that produces Eternity T Series, Leda, and Kelvinator models. Takagi is a global leader in water heating, so you're getting premium Japanese engineering at a competitive price point. The main difference is the Takagi branding and the AUD $1099 price tag makes it excellent value compared to the rebadged versions. You're buying the genuine article directly, with all the same quality and durability.

Will this heater work in cold climates, and does it need special installation?

Yes, it's designed for Australian conditions including colder climates. It has built-in anti-frost protection, so it won't freeze up in winter, making it suitable for Tasmania, Victoria's highlands, or anywhere with temperature dips. Installation is professional-only—you'll need a qualified gas fitter and plumber to connect it properly (it requires both gas and water line work). The unit comes with mounting screws and weighs 15.7 kg, measuring 570mm high x 350mm wide x 170mm deep, so factor that into your installation space.

Can I adjust the water temperature, and what if I want finer control?

Out of the box, it's preset to 50°C and you can adjust it in 5°C increments between 40-50°C using the heater's controls. If you want more precise temperature control (down to 1°C adjustments) or remote adjustment capability, you can purchase an optional remote controller separately, which extends the temperature range to 40-55°C. This is great if you have different household preferences or want to fine-tune for specific uses.