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Introducing the Thermann Smart Electric: The Smarter Way to Heat Your Water

Is your traditional electric hot water cylinder a source of frustration? Do you dream of a system that’s convenient, efficient, and saves you money? Look no further than Thermann Smart Electric, the revolutionary heatpump hot water systems are designed to make your life easier.


The Thermann Smart Electric: Putting You in Control

The Thermann Smart Electric goes beyond just heating water. It empowers you to manage your hot water usage with the innovative Thermann Control App, available for download on your smartphone. With the app, you can:

  • Become an Energy Guru: View your energy use and power costs in real time. Identify areas for improvement and make informed decisions to optimise your hot water consumption.

  • Save Money on Your Hot Water Bills: Take control of when your hot water system heats the water. This eliminates unnecessary heating cycles, reduces energy usage, and results in significant savings on your power bills.

  • Choose Your Perfect Mode: The Thermann Smart Electric offers four operating modes to suit your lifestyle:

    • Manual Mode: Prioritize savings by lowering the tank temperature while maintaining the anti-legionella cycle for safety.

    • Eco Mode: Embrace the power of machine learning. Eco Mode analyses your usage patterns and adjusts the heating cycle to minimise energy use while ensuring you have the hot water you need.

    • Holiday Mode: Going on vacation? No problem! Remotely turn off your hot water system with Holiday Mode, giving you peace of mind and preventing unnecessary energy consumption while you’re away.

    • Schedule Mode: Create a customised hot water schedule that aligns with your household’s needs. This ensures your hot water is available when you need it most while maximizing efficiency during low-usage periods.


More Than Just Smart: Thermann Smart Electric Benefits Everyone

While homeowners enjoy the convenience and cost-savings of the Thermann Smart Electric, plumbers will appreciate its installer-friendly features:

  • Simplified Setup: No need for a separate electrician. The Thermann Smart Electric streamlines the installation process, saving plumbers time and hassle.

  • Seamless Replacement: The Thermann Smart Electric is designed to fit perfectly in the space occupied by older Thermann models. This minimizes modifications needed during replacement, making it a breeze to upgrade existing systems.
  • Cost-Effective Solution: Recommend a system that delivers exceptional value to your clients. The Thermann Smart Electric’s efficiency and potential for solar integration (availability to be confirmed) translate to significant cost savings for homeowners.

The Thermann Smart Electric: A Smarter Choice All-Around

Whether you’re a homeowner yearning for a more convenient and efficient hot water solution, or a plumber seeking a user-friendly and cost-effective system to recommend, the Thermann Smart Electric is the answer.

The Thermann Smart Electric is coming soon to our website! Sign up for our newsletter to be the first to know when it’s available for purchase and take control of your hot water experience. In the meantime, contact us to learn more about this innovative system. For more information about the product, please visit

Important Note: The hot water tank must be filled with water before connecting to a power source.

How the Thermann Smart Electric Works:

  1. A hot water tap is turned on.
  2. Hot water is drawn from the top of the tank.
  3. Cold water enters through the bottom of the tank.
  4. When the water temperature around the heating element drops, the element activates.
  5. The heated water rises to the top of the tank.
  6. With the Thermann Control App, you control when the unit heats water, optimizing functionality and saving you money.


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Our most recent Hot Water Cylinder Installations around New Zealand for May

Hot Water Cylinders NZ has been very busy in the month of May!

With many installations all across New Zealand, here is a short list of our latest noteworthy hot water cylinder installations.  

Location: Christchurch Hot Water Cylinders
Before: 1978 Rheem Low Pressure Hot Water Cylinder
After: 2024 External Mains Pressure Thermann Hot Water Cylinder
Cost: $ 2900 + GST

Scope: Drained down old low pressure hot water cylinder and relocated plumbing / electrical to key location externally which offers quick and efficient hot water delivery.  


Location: Wellington Hot Water Cylinders
Before: 1999 Rheem Heatpump Hot Water Cylinder
After: 2024 External Mains Pressure Rheem Stainless Hot Water Cylinder
Cost: $ 2999 + GST

Scope: Replace existing Mains Pressure Heatpump Hot water cylinder which no longer offers efficiency, suffers from contaminated water due to internal runsting and causes irregular electrical faults. Installation of new External Stainless Steel Rheem Hot Water Cylinder. Reuse electrical point and concrete base in the same position. Earthquake restrains not complete at time of image. 


Location: Nelson Hot Water Cylinders
Before: 1978 Freeman Ltd Hot Water Cylinder
After: 2024 Internal Mains Pressure Thermann Enamel Hot Water Cylinder
Cost: $ 2600 + GST

Scope: Replace existing Low Pressure Hot water cylinder. This was a renovation with modern shower and tapware so it made sense to upgrade to Mains pressure despite the  functioning 1978 Low Pressure Hot Water Cylinder. Same location used. Existing power switch was used given this was only upgraded one year ago and complies with the new installation and power demand. A  new Hot Water Cylinder Tray  has been added to the installation to comply with NZS 3500 standards. 


Location: Auckland Hot Water Cylinders
Before: 1980 Econo Max Low Pressure Hot Water Cylinder 
After: 2024 External Mains Pressure Rinnai LPG instant hot water system
Cost: $ 3200 + GST

Scope: Remove old internal low pressure hot water cylinder and replace it with an instant gas hot water supply system Rinnai. Gas supply LPG. System converted to mains pressure. Upgraded tapware and shower to mains pressure. 


New Zealanders seeking reliable and efficient hot water upgrades, repairs, and replacements should consider choosing for several compelling reasons. Firstly, boasts extensive industry experience and a deep understanding of the unique needs of New Zealand homes and businesses. Their team of skilled professionals is dedicated to delivering top-notch service, ensuring that every project is completed to the highest standards. offers a wide range of high-quality products and services, catering to various needs and budgets. Whether it’s a simple repair, a full upgrade, or a complete replacement, they provide tailored solutions that enhance energy efficiency and reduce utility costs. Their extensive product range includes traditional hot water cylinders, modern continuous flow systems, and advanced solar water heating solutions, all designed to meet the specific demands of New Zealand’s diverse climate and environmental conditions.

Customer satisfaction is at the core of’s business model. They prioritize clear communication, timely service, and professional workmanship, ensuring that customers are fully informed and confident throughout the process. Their transparent pricing and detailed quotes eliminate unexpected costs, providing peace of mind and value for money.

Additionally, is committed to sustainability and environmental responsibility. By offering eco-friendly solutions and promoting the use of energy-efficient products, they help customers reduce their carbon footprint and contribute to a greener future.

In conclusion, stands out as the ideal choice for hot water upgrades, repairs, and replacements in New Zealand due to their expertise, comprehensive services, customer-centric approach, and commitment to sustainability. Choosing them ensures reliable, efficient, and environmentally-friendly hot water solutions tailored to meet the needs of every New Zealander.

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Stop Your Hot Water Cylinder CWE From Constantly Dripping.

Stop Your Hot Water Cylinder CWE From Constantly Dripping.

Upgrade your Hot Water Cylinder Installation with an Expansion Tank and stop the dripping.
Prevent Your Hot Water Cylinder’s Continuous Water Loss. Our blogs extensively cover the necessity of Cold Water Expansion valves and their dripping phenomenon.
Previous Published Blogs:

Common Cold Water Expansion Problems. Leaky Hot Water Cylinder Valve.

Cold Water Expansion Valves, Also Called Energy Saving Valves

Highlighted topics include:

  • Addressing Common Cold Water Expansion Problems
  • dentifying Leaky Hot Water Cylinder Valves
  • Understanding Cold Water Expansion Valves, Also Known as Energy Saving Valves

Excitingly, there’s an update for Hot Water Cylinders, presenting a permanent solution to cease the incessant drip of Cold Water Expansion valves.

Cold water expansion valves discharge around 4.5 liters of water a day to the drain. Expansion vessels are able to manage the effects of thermal expansion within a storage water heating system without discharging treated drinking water down the drain. This will reduce the amount of water used by the system.

Considering the continuous increase in water expenses, especially in cities such as Auckland, it’s prudent to consider investing in an expansion tank. This investment can effectively minimize water discharge, leading to savings not only on water bills but also on valve maintenance costs. Take the step to upgrade to an expansion tank by scheduling your appointment with Hot Water Cylinders NZ today.

An expansion tank is not merely an additional component but rather a crucial enhancement to your hot water cylinder system. By incorporating an expansion tank, you’re not only addressing the issue of water wastage but also ensuring the longevity and efficiency of your entire water heating setup. Let’s delve deeper into why investing in an expansion tank is a wise decision.

First and foremost, let’s address the persistent problem of water loss caused by cold water expansion valves (CWE). These valves are essential for regulating the pressure within the hot water cylinder by allowing excess water to escape when it expands due to heating. However, the continuous dripping of water from these valves can lead to significant wastage over time. An expansion tank offers a solution by providing a designated space for the expanded water to accumulate, eliminating the need for constant discharge into the drain.

Moreover, the installation of an expansion tank serves to mitigate the financial burden associated with escalating water expenses. As mentioned earlier, cities like Auckland are witnessing a steady rise in water costs, making it imperative for residents to adopt measures that promote water conservation. By reducing water discharge through the use of an expansion tank, you’re not only contributing to environmental sustainability but also saving money on your utility bills in the long run.

Additionally, let’s consider the impact of continuous water discharge on the maintenance of hot water cylinder valves. The incessant dripping can lead to wear and tear, necessitating frequent repairs or replacements, which can incur additional costs. By investing in an expansion tank, you’re effectively reducing the workload on the valves, thereby extending their lifespan and minimizing maintenance requirements.

Furthermore, it’s essential to highlight the role of expansion vessels in managing thermal expansion within a water heating system. These vessels help alleviate pressure buildup caused by fluctuations in temperature, ensuring the smooth operation of the entire setup. By integrating an expansion tank into your hot water cylinder installation, you’re enhancing its overall efficiency and reliability.

In summary, the decision to upgrade to an expansion tank is not only a proactive step towards conserving water and reducing utility expenses but also a strategic investment in the longevity and performance of your hot water cylinder system. Don’t wait until water wastage becomes a costly issue – take action now by scheduling your appointment with Hot Water Cylinders NZ and experience the benefits of a comprehensive water heating solution.