- Energy rating
- 6 star
- Warranty
- 12 years
- Gas
- NG & LPG
- Approved
- AGA · Watermark
Thermann · Continuous flow gas
Thermann 6★ 20L Continuous Flow Gas Hot Water System, 60° Natural Gas
The Thermann 6-star, energy efficient gas continuous flow unit ensures you will have enough hot water when you need it, in a 20L size for smaller homes, with Japanese technology and manufacture.
It is AGA and Watermark approved, available in natural gas and LPG across 50 and 60 degree models, with a 12 year warranty and optional universal controllers.
- Japanese technology and manufacture
- AGA approved
- Watermark approved
- 6 star energy rating
- Available in NG and LPG, 50 and 60 degree models
- Optional universal controllers
- 12 year warranty
Why this unit
What makes this Thermann unit a good pick
The reasons are practical rather than marketing.
Supplied and installed by our own licensed plumbers and gasfitters.
Value
6 star, sensibly priced
A 6-star unit with Japanese manufacture at a competitive price, a common pick for smaller homes, rentals and renovations.
Assurance
AGA & Watermark approved
Certified to Australian standards with a 12 year warranty behind the heat exchanger.
Flexibility
NG or LPG, 50 or 60°
Available on natural gas or LPG in 50 and 60 degree models, so it suits most sites.
Build your order
Add the Thermann 6★ 20L to your order
Pick the model and add any extras your property needs — professional installation is included on every system. The total updates as you go, and we confirm everything with you before any work is booked.
Detail
Specifications, delivery and care
The figures and terms below apply to this model. Open whichever section you need.
| SKU | 7492 |
|---|---|
| Type | Continuous flow gas, instantaneous |
| Energy rating | 6 star |
| Temperature | 60° (50° also available) |
| Gas types | Natural gas and LPG |
| Certifications | AGA approved, Watermark approved |
| Origin | Japanese technology and manufacture |
| Warranty | 12 years |
Delivery areas
We deliver hot water systems, parts and accessories across New South Wales and to selected areas throughout Australia. Availability can vary with your postcode and the size of the product, so contact us first if you are outside the standard delivery area.
Delivery timeframes
Estimates only, and they can be affected by courier delays, weather or other events outside our control.
- Sydney metro: 1 to 3 business days
- Regional NSW: 2 to 7 business days
- Interstate: 3 to 10 business days
Delivery charges
Shipping is calculated at checkout from your delivery location, the size and weight of the product, and any installation requirements. Some products and promotional offers include free delivery within selected metro areas.
Installation deliveries
Where installation is booked with your purchase, our team contacts you to arrange a date and time once the order is confirmed. Scheduling depends on technician availability and your location.
On arrival
Please inspect your order when it arrives. If it looks damaged, incomplete or incorrect, tell us within 48 hours and include photographs where you can.
Returns
We comply with the Australian Consumer Law. Nothing here limits your rights under the Competition and Consumer Act 2010 (Cth).
Change of mind returns may be accepted at our discretion when the request is made within 30 days of delivery, the product has not been installed or used, it remains unopened in its original packaging and it is in resalable condition. Return shipping for approved change of mind returns is generally the customer's responsibility. Special order and custom products cannot be returned for change of mind.
If a product is faulty, damaged or not as described, contact us as soon as you can. Depending on the circumstances we may repair it, replace it, provide a refund or arrange collection. If you receive the wrong product, contact us within 48 hours and we will arrange a replacement or collection at no extra cost where the error is ours.
How to request a return
Contact our team with your order details, explain the reason, send photographs if we ask for them, and wait for return instructions before sending anything back. Returns sent without prior approval may not be accepted. Approved refunds go back to the original payment method, usually within 5 to 10 business days of the return being received and inspected.
Full terms are on the shipping and return policy page.
A continuous flow unit has no tank and no anode to replace, so care is mostly about keeping it clear and checking it still runs the way it should.
- Keep the area around the unit clear so air can move freely and the flue is not obstructed.
- Keep the filter at the cold water inlet clean, particularly if the supply carries sediment.
- Have the gas and water connections checked by a licensed technician if you notice a change in temperature, flow or ignition.
- Note any error code shown on the display before you call, because it points straight at the fault.
- Book a service if the unit is cycling, taking longer to reach temperature or dropping temperature when a second tap opens.
If something is not right, our phone line is attended 24 hours on 1300 096 668.
How it works
From first call to hot water back on
The same four steps apply whether you are replacing a failed unit or planning an upgrade.
Tell us what is happening
Call or order online with your suburb and the system you have now. Photos of the unit and its data plate help a great deal.
We scope and quote
We confirm the model, the installation and any extras the site needs, then come back to you before anything is booked.
We supply and install
We bring the unit, disconnect the old system, install and commission the new one, and check the valves are working as they should.
We clear the site
The old unit is taken away where you have asked us to, the work is tested in front of you, and you get the paperwork and warranty details.
Related products
Other systems we supply and install
These are the units we are asked about most often alongside it.
Common questions
Thermann 6★ 20L questions
Thermann continuous flow units carry a manufacturer's warranty — commonly up to 10–12 years on the heat exchanger, with shorter terms on parts and labour. We confirm the exact warranty for this model in writing before you order, and we handle any warranty claim for a system we installed.
Continuous flow units are rated by flow in litres per minute, not storage. A 26L/min unit suits most homes up to about two to two-and-a-half bathrooms; smaller units suit one to two. Tell us how many bathrooms you have and how the hot water gets used and we will confirm the right size before you order.
We supply and install as one job. Installation is included on every system here, so one licensed team handles the unit, the fit-off and the removal of the old system. If you have your own plumber and want supply only, ask us and we will sort that out.
This unit is pre-set to deliver 60°C, hot enough for the kitchen and laundry where 50°C is often not enough. It is normally paired with a tempering valve on the bathroom outlets for safety. A 50°C temperature-limited version is also available if you prefer.
Most continuous flow units are external-wall mounted. If the only practical position is internal, we will look at a model built for indoor installation rather than fit an external unit somewhere it does not belong. We confirm the position when we quote.
A valve kit is mandatory on instantaneous gas systems, so it applies to this unit. The rest depend on the site: removal of the old unit, an isolation valve, a pressure limiting valve where mains pressure runs high, or pipework changes where the position or model has changed. We confirm the final list with you before any work is booked.
Ask about this system
Questions about this Thermann system?
Tell us about your place and we will confirm whether it suits, what the installation involves at your property and which extras you actually need before you order. If your hot water is out right now, calling is faster.
A straight answer on fit
We will say if a different system suits your property better, rather than selling you this one.
Phone attended 24 hours
Hot water emergencies do not keep business hours, so neither does the line.
Based at Lidcombe
93B John St, Lidcombe NSW 2141, servicing Sydney and Greater Sydney.
Thermann 6★ 20L Continuous Flow Gas Hot Water System, 60° Natural Gas enquiry
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