🏷️ Brand: Thermann
🔢 Model Number: Smart 400L
📦 Volume: 400L
📏 Width: 705 mm
📐 Height: 1705 mm
🌍 Manufactured In: Australia
🛠️ Cylinder / Heat Exchange Material: Steel Enamel
🛡️ Cylinder / Heat Exchange Warranty: 10 Years
🔇 Noise Level: NA dBa
⚖️ Dry Weight: kg
⚡ Energy Source:
📡 WiFi Controller: Yes
⏲️ Built-In Timer: Yes
💡 LED/LCD Status Indicator: No
📊 Coefficient of Performance (COP): 1

Thermann Smart Electric 400L Storage Hot Water System – Smart Technology for Big Homes, Big Comfort

Summary

Designed for large households that never want to run out of hot water, the Thermann Smart Electric 400L Storage system delivers reliable performance with cutting-edge smart features that help you save energy, reduce bills, and stay in control—all from your phone.

Why Choose the Thermann Smart Electric 400L?

Massive 400L Capacity for Big Families

Never run out of hot water again. Perfect for homes with 5+ people, this large-capacity system provides a consistent supply of hot water for multiple bathrooms, back-to-back showers, and daily laundry demands.

Smart Wi-Fi App Control

With the Thermann app, you're in complete control.

• Monitor usage in real-time

• Adjust heating times remotely

• Track energy consumption

• Set schedules to avoid heating during peak energy periods
  Perfect for those looking to slash energy bills without sacrificing comfort.

Energy-Saving Operating Modes

Whether you’re home or away, Thermann has your back:

• Eco Mode: Learns your usage patterns to reduce energy waste.

• Schedule Mode: Set heating to match your daily routines.

• Holiday Mode: Save power while you're away.

• Manual Mode: For when you want full control.

Built Tough for Aussie Conditions

• Built-in protection for hard water areas

• Durable enamel-lined steel tank

• Backed by 10-year tank warranty and robust support

Custom Heating Options

Choose your heating element to match your energy use and recovery needs:

• 1.8kW, 2.4kW, or 3.0kW options

• Fast recovery of up to 51.6L/hour @ 50°C rise
  More hot water, faster—just the way you want it.

Easy Installation & Compliance

Supplied and installed by Brisbane & Gold Coast's 2023, 2024 & 2025 Best Plumbers, this unit includes:

• QBCC Form 4 compliance

• All valves and fittings

• Safe and clean removal of your old system
  You get expert advice, clean workmanship, and total peace of mind.

Key Benefits at a Glance

✅ Smart Wi-Fi App – Control and monitor from anywhere
✅ Huge 400L Capacity – Great for 5+ people
✅ Eco Mode – Automatically lowers power use
✅ Hard Water Ready – Long-lasting durability
✅ Fast Recovery – Up to 51.6L/hour
✅ 10-Year Warranty – Built to last
✅ Installed by Award-Winning Experts in SE QLD

What’s Included in Your JR Gas & Water Installation?

• Full installation by licensed plumbers & electricians

• Removal of your old hot water system

• All required valves and fittings

• Thermann 400L Smart Electric Storage Unit

• Set-up of Wi-Fi app and operating modes

• QBCC Form 4 for full compliance

Questions About This System

1. Will 400L be enough for my household?
Yes—this is ideal for families of 5 or more with multiple bathrooms.

2. Can I control it from my phone?
Absolutely. The Thermann app gives you full control from anywhere in the world.

3. What’s the best mode for saving power?
Eco Mode learns your habits and minimises energy use without compromising comfort.

4. Is it safe for areas with hard water?
Yes—it’s designed with components that can handle hard water conditions.

5. Is installation included in the price?
Yes—our team handles everything, from delivery to installation and cleanup.

Use collapsible tabs for more detailed information that will help customers make a purchasing decision.

Ex: Shipping and return policies, size guides, and other common questions.

Electric Hot Water System Package Selection Guide

(Please rotate mobile device to landscape for easy viewing)

Choosing the right electric hot water system package depends on your installation needs, household size, and whether additional electrical work is required. Use this guide to compare package levels and find the best fit for your home.

Selecting the right package helps streamline installation, but we understand that needs may change, and that the purchaser isn’t a plumber. We’re flexible and can make adjustments, such as upgrading to the next package as needed.

💡 Which Package is Right for You?

IMPORTANT - All online packages are for EXTERNAL installations only, for internal installations please complete our quote request form.

✅ Base – For compliant replacements of Existing Identical Compliant EXTERNAL installations
Ideal for identical exact swaps of the same electrical hot water system where the existing system meets legal compliance requirements. (example below) No extra plumbing, valves, pipework, support base, electrical work or disposal required or included.

(EXAMPLE - A Rheem 250L 491250 replacing complaint Rheem 250L 491250 not a Rheem 250L 101250)

✅ Silver – For minor upgrades to an existing electric hot water system under 10 years old.
Includes minor pipework alterations and a valve kit but does not include electrical modifications, support base or system disposal. Designed for those swapping a similar electric system and working to a tight budget. 

(EXAMPLE - Swapping an 8year old Rheem 160L with a new Rinnai 315L where the existing installation is compliant but requires pipework alterations to adapt the new unit and new valve set for warranty)

🏆 Gold (Best Seller) – For standard electric replacement installations
Covers a new valve set, old system removal, expansion drain lines, support base and plumbing modifications, making it the most common choice for standard installations.

(EXAMPLE - Swapping a 20year old Dux 125L with a new Vulcan 315L, Strip all down and redo the valves, pipework, drain lines, support base and dispose of the old unit)

💰 Sapphire (Best Value) – For installations requiring minor electrical work
Adds electrical safety features like an isolator, safety switch, and cable extensions to our gold package to ensure a compliant and safe electrical connection.

(EXAMPLE - Swapping an old heat pump/split solar system with a new Everhot 400L that requires a hardwired electrical connection, then strip all down and redo the valves, pipework, drain lines, support base and dispose of the old unit)

✅ Diamond – For homes needing extensive electrical work
Provides extra plumbing and electrical modifications, including a new electrical circuit on top of our gold package making it ideal for homes without existing wiring for an electric system.

(EXAMPLE - Swapping an old Gas System with a new Rheem 315L that needs its own dedicated electrical circuit, type then strip all down and redo the valves, pipework, drain lines, support base and dispose of the old unit)

✅ Platinum – The ultimate package
Includes everything – system relocation, extensive plumbing, valve set, support base, drain lines, disposal, electrical upgrades, and a new electrical circuit for complete installation flexibility.

(EXAMPLE - Replacing any existing system of any type then relocating it to a new position on the house that requires the electrical/plumbing to be installed or relocated to the new installation position)

🏆 Package Comparison Guide

Whenever a product is required, we only source from trusted, warranty‑backed manufacturers:

• Valves – AVG, RMC, Rye Metal (and subsidiaries)
• Copper – Type B Kembla or Crane
• PEX Systems - Ezipex
• Insulation – eFlex or K‑Flex
• Electrical switches & timers – Hager
• Conduit – Medium Duty PVC Vinidex or GTS
• Brassware – Brasshards
• Hydraulic crimp fittings – EziPress, Viega, Kembla
• Sealants – Loxeal

Feel free to let us know if you have any other preferred brands!

IMPORTANT - All online packages are for external installations only, for internal installations please complete our quote request form.

IMPORTANT - Solar panel and roof-mounted tank removal is not included in any package and is available as an optional extra at additional cost.

🛠 Need Help Choosing?

Not sure which package is right for you? Contact JR Gas & Water, and we’ll help you select the best solution for your home!

Your electric storage hot water system is built to provide years of reliable hot water, but like any major household appliance, it requires regular maintenance to remain safe, efficient and covered under the manufacturer's warranty.

Many manufacturers specify routine maintenance throughout the life of the system. Following these recommendations helps maximise the lifespan of the unit, maintain safe operation and reduce the likelihood of unexpected breakdowns.

Homeowner Maintenance – Every 6 Months

Every six months, homeowners should carefully operate the Pressure & Temperature Relief (PTR) Valve and Expansion Control Valve (ECV) (where fitted).

This simple maintenance helps:

• Confirm the safety valves are operating correctly.
• Flush away mineral deposits that can cause the valves to seize.
• Prevent excessive pressure from building inside the tank.
• Extend the life of the safety valves.

Why is this important?

Over time, minerals naturally found in water can build up inside the valves. If they are never operated, they may become stuck or fail when they're needed most.

A seized PTR or ECV valve can lead to:

• Excessive pressure inside the tank.
• Continuous leaking from the valve.
• Reduced system efficiency.
• Premature component failure.
• Potential safety risks.

Important: Always follow your manufacturer's instructions when operating the valves, as hot water will discharge during testing. If you're unsure or unable to perform this maintenance safely, contact a licensed plumber.

JR 6-Month Hot Water Health Check

Recommended Service – $99

While homeowner maintenance is important, a professional inspection provides additional peace of mind and can identify issues long before they become expensive repairs.

Our JR 6-Month Hot Water Health Check includes:

• Inspection for water leaks and corrosion.
• Testing of the PTR valve.
• Testing of the ECV (where fitted).
• Checking electrical operation.
• Inspecting wiring and electrical connections.
• Checking thermostat operation.
• Inspecting the element for signs of failure (where possible).
• Inspecting insulation and pipework.
• Checking for unusual noises or signs of sediment build-up.
• Confirming correct operation and water heating performance.
• Identifying any components showing signs of wear.

Service Price: $99

Regular inspections help detect small problems early, reducing the likelihood of unexpected breakdowns and helping maximise the life of your hot water system.

Recommended 5-Year Major Service

Current Price: $449

Most electric storage hot water manufacturers recommend replacing several key components approximately every five years to maintain reliable operation and protect the storage tank.

Our comprehensive 5-Year Service includes:

• Replacement of the sacrificial anode.
• Replacement of the Pressure & Temperature Relief (PTR) Valve.
• Replacement of the Expansion Control Valve (ECV).
• Full inspection of the hot water system.
• Electrical safety and operational testing.
• Inspection of pipework, valves and fittings.
• Leak and corrosion inspection.
• System performance testing.

Why These Components Matter

Sacrificial Anode

The sacrificial anode protects the steel tank from internal corrosion.

Instead of the tank rusting, the anode slowly corrodes over time. Once it has been consumed, the tank itself begins to rust from the inside, often leading to leaks and complete tank failure.

Replacing the anode is one of the most effective ways to extend the life of a storage hot water system.

Pressure & Temperature Relief (PTR) Valve

The PTR valve is one of the most important safety devices on your hot water system.

It automatically releases water if pressure or temperature inside the tank becomes too high, protecting both the system and your home.

Over time, scale and mineral deposits can prevent the valve from operating correctly, making regular testing and replacement essential.

Expansion Control Valve (ECV)

The ECV manages pressure created as water expands during heating.

A correctly functioning ECV:

• Reduces stress on the storage tank.
• Protects plumbing components.
• Helps extend the life of the hot water system.
• Reduces unnecessary water discharge through the PTR valve.

If Your Hot Water System Isn't Working

Before arranging a service, there are a few simple checks you can perform:

• Ensure the power is switched on at the electrical switchboard.
• Check whether the hot water circuit breaker or safety switch (RCD) has tripped.
• Confirm the isolation switch near the hot water system is turned on.
• Check whether your electricity supplier has scheduled an off-peak interruption.
• Look for obvious water leaks around the system.
• Check whether water is continuously flowing from the PTR or ECV valve.
• Listen for unusual noises such as excessive boiling, rumbling or banging.
• Confirm the system has had sufficient time to reheat after heavy water usage.

If your system still isn't producing hot water, contact JR Gas & Water for professional diagnosis and repair.

General Signs Your System May Need Attention

Arrange a service if you notice:

• Water leaking from the tank.
• Constant dripping from relief valves.
• Rust-coloured or dirty hot water.
• Reduced hot water capacity.
• Water taking much longer to heat.
• Unusual noises during heating.
• Visible corrosion.
• Fluctuating water temperature.
• Repeated electrical trips.

Early repairs are often significantly less expensive than replacing a failed hot water system.

Protect Your Warranty & Maximise System Life

Regular maintenance not only helps keep your hot water system operating safely and efficiently—it can also assist in meeting manufacturer maintenance requirements.

Ignoring recommended servicing may result in:

• Premature tank corrosion.
• Seized or leaking safety valves.
• Reduced efficiency and higher running costs.
• Unexpected loss of hot water.
• Avoidable repair costs.
• Shortened system lifespan.
• Possible reduction or loss of manufacturer warranty, depending on the manufacturer's maintenance requirements.

A small investment in preventative maintenance can add years to the life of your hot water system and help avoid the inconvenience and expense of an unexpected replacement.

ZipPay – 6-Month Interest-Free on All Products

ZipPay allows you to buy now and pay later, offering flexible, interest-free payments for up to 6 months on all JR products. It’s easy to set up, and you can customize your repayment schedule to suit your budget. Payments can be made weekly, fortnightly, or monthly, with a $6 fee if the balance isn’t paid off by the due date​.

Humm – Up to 12 Months Interest-Free

Humm provides interest-free payment plans on purchases up to $30,000, perfect for both small and large buys. For items over $2,000, you can spread payments over 12 months. Humm also offers flexibility in scheduling payments based on when you get paid​

Afterpay – 8 Weeks, No Interest

With Afterpay, spread the cost of purchases across four equal installments, due every two weeks, over an 8-week period. There’s no interest, and as long as payments are made on time, there are no fees. Perfect for purchases between $100 and $1,500​

Plenti Finance – For Reclaim Systems Only

Plenti Finance is available exclusively for Reclaim Energy systems. This option offers tailored repayment terms with competitive interest rates, helping make eco-friendly choices more affordable. For more detailed information on Plenti’s terms and eligibility for Reclaim systems, visit the Reclaim Energy finance page​

If you're in Queensland and considering a new electric hot water system, JR Gas & Water is the company to choose. Here's why:

Experience and Expertise: JR Gas & Water has over 10 years of experience in the gas and plumbing industry. Their team of licensed and insured professionals is highly skilled and knowledgeable about all aspects of electric hot water system installation, maintenance, and repair. They can provide expert advice on the best system for your needs and ensure a smooth installation process.

Quality Products: JR Gas & Water uses only high-quality products from trusted brands to ensure your electric hot water system is reliable and efficient. They also offer a range of options to suit different budgets and requirements.

Competitive Pricing: JR Gas & Water offers competitive pricing for their electric hot water systems, ensuring that you get a great value for your investment. They also provide a detailed quote upfront, so there are no surprises or hidden costs.

Customer Service: JR Gas & Water is committed to providing excellent customer service. They are always available to answer any questions or concerns you may have and are committed to ensuring your satisfaction.

Local Business: JR Gas & Water is a locally owned and operated business in Queensland. By choosing them for your electric hot water installation, you are supporting a local business and contributing to the local economy.

Warranty and Guarantee: JR Gas & Water provides a warranty and guarantee on all their products and services, giving you peace of mind knowing that your system is covered in case of any issues.

Energy Efficiency: Electric hot water systems can be energy efficient, and JR Gas & Water can help you choose the right system for your needs. They can provide advice on energy-saving features and options, such as timers and thermostats, to help you save on your energy bills.

Safety: JR Gas & Water is committed to safety and ensuring that all installations are done to the highest safety standards. They are also familiar with local safety regulations and requirements, ensuring that your electric hot water system is installed safely and in compliance with all relevant codes.

JR Gas & Water is a reliable and experienced choice for your electric hot water system installation in Queensland. With a commitment to quality products, competitive pricing, excellent customer service, and safety, they can help you make the switch to a more efficient and cost-effective solution for your hot water needs. Contact them today to learn more about their services and how they can help you.