Frequently Asked Questions

Have questions about our RadTherm electric radiators or Sunamp heat batteries? We’ve got you covered! Below, you’ll find answers to the most common queries about installation, efficiency, warranties, and more. If you need further assistance, our expert team is always happy to help—simply get in touch for personalised advice.

RadTherm Electric Radiators FAQ's

Can You Install the Radiators for Me?

Yes! Our expert installers ensure a hassle-free experience with a clean, efficient, and professional installation process.

Are the Radiators Hardwired?

There are multiple installation options available, and our specialists will discuss the best solution for your home during your consultation.

How Can I Control the Radiators?

You can manage your heating remotely using the RadTherm App, adjust settings directly on the radiator’s built-in digital controls or even control it hands-free using Google Home or Amazon Alexa.

How Much Energy Do RadTherm Radiators Use?

Energy consumption varies depending on usage and room conditions. However, RadTherm radiators are 100% efficient, and once up to temperature, they typically require only 12-15 minutes of power per hour.

What Colour Options Are Available?

With over 900 colours to choose from, you can perfectly match your radiator to your interior. Our advisor will bring a RAL colour swatch during your survey to help you decide.

Do RadTherm Radiators Have a Fan?

No, RadTherm radiators operate silently without the need for a fan. Their unique design naturally circulates warm air to evenly heat the entire room.

Are RadTherm Radiators LOT20 Compliant?

Yes, our radiators are fully LOT20 compliant and independently tested, with installations in over 35 countries worldwide.

Will I Need Additional Electrical Work?

In most cases, no. RadTherm radiators come with a plug, allowing them to be connected to any standard socket. During your survey, our advisor will inspect your consumer unit and discuss any necessary requirements.

Are Electric Radiators Expensive to Run?

Running costs depend on various factors, such as room insulation, usage patterns, and electricity tariffs. However, many customers transitioning from older heating systems, such as night storage heaters, report significant energy savings—sometimes reducing costs by up to two-thirds.

What Size Radiator Do I Need?

Choosing the right size is crucial to achieving the right levels of heat combined with the lowest potential for running costs. If your radiator is under-sized then it will fight to reach temperature and ultimately never achieve it, therefore costing far more to operate than it should. Likewise, if your radiator size/output is too large then you will be paying more in electricity right from the start. RadTherm radiators are sized according to the specific requirements of the room to be heated, taking into account many factors such as single/double glazing, external walls, cavity wall insulation and more.

Which Electric Radiators Are the Best?

Not all electric radiators are created equal. Cheap convector heaters can be inefficient and costly to run. RadTherm radiators stand out for their superior heat distribution, efficiency, and low running costs, making them a smart, long-term investment in home heating.

How Much Does It Cost to Run an Electric Radiator?

While costs depend on room size, insulation, and usage, RadTherm radiators are 100% efficient at point of use, helping to minimise energy waste.

How Do Electric Radiators Work?

RadTherm radiators use a balanced mix of radiant and convected heat (50/50), with an innovative fluted design that enhances airflow for even heat distribution—eliminating cold spots and keeping your space comfortable.

How Long Does the Installation Take?

Most installations are completed within a single day, including the removal of your existing heating system.

What Is the Lead Time for RadTherm Radiators?

RadTherm radiators are manufactured in Germany to order, not sat gathering rust and dust in UK warehouses! Standard lead times are approximately four weeks.

Are These Night Storage Heaters?

No, RadTherm radiators are direct-acting electric radiators, not traditional night storage heaters. However, their patented smart core provides partial heat storage, which helps improve efficiency and reduce running costs.

What Warranty Do RadTherm Radiators Come With?

RadTherm radiators come with an industry-leading 30-year manufacturer’s warranty covering the patented smart core and a 4-year warranty on electronic components/thermostatic controls, which is twice the industry standard.

Sunamp Heat Battery FAQ's

What Sizes Are Available for Sunamp Thermino Heat Batteries?

Sunamp Thermino heat batteries come in four sizes to suit different household needs: 70L, 150L, 210L, and 300L.

How Do I Choose the Right Size?

The ideal size depends on factors such as the number of occupants, baths, showers, and sinks in your home. A free survey will help determine the best option for your needs.

Is Sunamp Compatible With Different Energy Sources?

Yes! Sunamp Thermino heat batteries can work with grid electricity, solar PV, heat pumps, and boilers, making them a highly flexible solution.

Are Sunamp Heat Batteries Compact?

Absolutely! A Sunamp Thermino is up to four times smaller than the equivalent water tank, freeing up valuable storage space.

Do Sunamp Heat Batteries Require Annual Servicing?

No, there is no mandatory servicing required, making it a hassle-free solution.

Who Can Benefit From a Sunamp Thermino Heat Battery?

Homeowners, landlords, and property developers all use Sunamp heat batteries. They’re perfect for reducing energy bills, lowering carbon footprints, and eliminating reliance on gas.

Is It Safe?

Yes! Sunamp Thermino heat batteries are non-toxic, non-flammable, and highly reliable, ensuring a safe heating solution for your home.

What’s Inside the Sunamp Thermino?

Sunamp heat batteries use world-leading Plentigrade phase change technology to efficiently store and release heat. he Thermino range uses high-performance Plentigrade P58 phase change material to deliver hot water on demand. It absorbs and releases thermal energy during a melting and freezing process in a similar way to the gel in a pocket handwarmer. Freezing releases a huge amount of energy in the form of heat at a constant temperature.

Can It Be Used With an Economy 7 Tariff?

Yes, Sunamp heat batteries work with all electricity tariffs, including Economy 7 and agile tariffs, allowing you to take advantage of cheaper electricity rates.

What Warranty Does a Sunamp Thermino Come With?

Sunamp heat batteries come with a market-leading 10-year manufacturer’s warranty covering the heating element and storage core.

Will a Sunamp Heat Battery Work With My Shower?

A Thermino is compatible with most showers and its high powered heat exchanger allows for high quality, mains pressure showers. No more poor water pressure at shower time.

How Efficient Is a Sunamp Heat Battery?

Sunamp Thermino batteries are four times more efficient at storing heat compared to traditional hot water cylinders.

Does It Store Water Like a Traditional Cylinder?

No, it stores heat energy, not water, eliminating the risk of leaks or catastrophic water failure.

Does It Provide Instant Hot Water?

Yes! Sunamp instantly heats water as needed, ensuring freshness and hygiene.

How Efficient Are Heat Batteries?

Sunamp heat batteries, powered by Plentigrade phase change technology, are more efficient and cost-effective than traditional battery storage systems. They store up to four times more energy than water, maximising efficiency while reducing energy costs.

How Does a Heat Battery Work?

A Sunamp heat battery absorbs and releases thermal energy through a melting and freezing process, similar to how a pocket hand warmer functions. As it freezes, it releases a large amount of heat at a constant temperature, ensuring reliable and efficient hot water production.

What is a Sunamp Heat Battery?

A Sunamp heat battery is an energy-saving thermal store that captures and retains heat, providing on-demand hot water when needed. It offers a space-saving, highly efficient alternative to traditional water cylinders while reducing energy consumption.

Is Installation Disruptive?

Not at all! If you already have a water cylinder, our team will remove and dispose of it, making any necessary pipework adjustments. The installation takes just a few hours, and your mains pressure hot water will be back the same day.

Can a Sunamp Heat Battery Be Recycled?

Yes! Sunamp heat batteries are fully recyclable, making them an eco-friendly heating solution.

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