The wattage of a radiator depends on the size of your room.

• For a well-insulated home, we recommend allowing 100W per m².
• For a poorly insulated home, opt for 125W per m²: this makes it easier to heat the room whilst optimising your energy consumption.

Examples:

• A well-insulated 10m² room: 100W/m² × 10m² = 1000W
• A poorly insulated 20m² room: 125W/m² × 20m² = 2500W

These estimates are provided as a guide and may vary depending on the insulation of your home. For personalised advice, please do not hesitate to contact us via the contact form.

• Ceramic: this material heats up quickly and releases heat almost immediately. Ideal for bedrooms or kitchens, it delivers a feeling of warmth from the moment it switches on.
• Cast iron: cast iron takes a little longer to heat up, but retains warmth for a long time thanks to its exceptional thermal mass. It distributes gentle, even heat — perfect for living spaces where you want to feel truly warm and comfortable.
• Heating film: integrated into certain radiators, this conductive film generates heat evenly and efficiently. It enables a rapid rise in temperature whilst optimising energy output.

Several solutions can help you use less energy, both in terms of your radiators and the insulation of your home.

For your radiators:

• Activate open window detection to avoid heat waste
• Use "Eco" mode rather than "Comfort" mode when you are away from home or at night
• Set schedules or create a personalised programme to adapt the heating to your needs

For your home:

• Insulation plays a major role in energy consumption. Do not hesitate to consult a professional to assess and improve your insulation

Rest assured: our radiators comply with all current European and French standards, for safe and efficient heating.

Electric radiators are not subject to energy ratings, as they are classified as secondary heating appliances.

Actual energy consumption depends primarily on your habits and how you use the radiator — much like a car's fuel consumption, which varies according to driving style.

Our radiators remain highly energy-efficient. Thanks to their rapid heat-up and dry inertia technology, they continue to distribute warmth even after reaching the desired temperature. This ensures lasting comfort whilst keeping energy consumption to a minimum.

Smart connected radiators offer personalised comfort and intelligent heating management. They allow you to:

• Schedule and control the temperature remotely via a mobile app
• Optimise energy consumption by adapting the heating to your routine and occupancy
• Enjoy even, pleasant warmth thanks to precise temperature settings

Discover our range of Smart Wi-Fi Radiators and enjoy a personalised, intelligent and energy-efficient heating experience.

The PIR Motion Sensor on the DIANE radiator automatically adjusts the temperature according to the occupancy of the room.

When no presence is detected, the temperature reduces progressively:

• 20 min → Comfort -1°C
• 40 min → Comfort -2°C
• 60 min → Eco mode
• 72 hrs → Frost Protection mode

When presence is detected, the radiator immediately returns to Comfort mode at the set temperature — guaranteeing comfort and energy savings without any manual intervention.

This system ensures optimal comfort whilst saving energy, with no unnecessary triggering caused by draughts or pets.

To choose the right heated towel rail, several criteria should be taken into account:

1. Wattage:

• Measure the floor area of your bathroom and choose an appliance whose wattage is suited to maintaining a comfortable temperature.

2. Heating type:

• Standard fluid-free (without fan boost): ideal for well-insulated or low-humidity bathrooms.
• Fluid-free with fan boost: gentle warmth plus fan boost activatable on demand. Ideal for poorly insulated bathrooms, busy mornings or cold winter days.

3. Features required:

• Customisable scheduling, Eco and/or Boost modes, open window detection, integrated or remote thermostat (separate controller)...
• Smart connected option to manage the temperature remotely via an app.

For a choice perfectly suited to your needs, discover our comprehensive guide to choosing a heated towel rail.

Yes, it is possible to install your radiator yourself, provided you follow the installation manual carefully to ensure a safe and compliant installation.

Our radiators are fitted with single-phase wiring for direct connection in accordance with the manufacturer's instructions. To help you, we provide:

• A comprehensive step-by-step blog article

If you have any doubts regarding the wiring, compliance or adherence to electrical standards, we strongly recommend calling on a qualified electrician.

No, our radiators are designed for direct single-phase wiring and are not fitted with a standard plug. The connection must follow the instructions provided in the installation manual and comply with the electrical standard NFC 15-100.

To help you, we provide a wiring diagram.

To ensure the safety and correct operation of your appliance, if you have any doubts regarding the connection or compliance, we strongly recommend calling on a qualified electrician.

Our radiators are fitted with an 80cm single-phase cable. For safety reasons, this cable must not be extended or shortened.

If you have any doubts regarding the installation or connection, we strongly recommend calling on a qualified electrician.

Yes, all our appliances — radiators and heated towel rails — are supplied with the screws, wall bracket and installation manual required for a safe and compliant installation.

A radiator designed for horizontal installation must not be positioned vertically, and vice versa. Failure to follow these instructions may result in malfunctions, reduced performance and the voiding of the warranty.

We offer several radiator formats (horizontal, vertical, skirting board) to suit every configuration and requirement.

For further information, please refer to your appliance's instruction manual, where you will find all installation recommendations, including the minimum distances to be observed. Instruction manuals are available to download on each product page, in the documentation section.

You can adjust the temperature calibration of your radiator by following the instructions in the installation manual.

The adjustment range allows you to fine-tune the temperature by -5°C to +5°C.

For example, if your room displays 18°C and the radiator is set to 20°C, you can reduce the radiator setting by -2°C to achieve the actual desired temperature.

This feature allows you to correct any discrepancies and optimise thermal comfort in your room.

The open window mode activates when the radiator detects a sudden drop in temperature. When triggered, the radiator automatically switches to Frost Protection mode to limit energy consumption.

When the radiator is in Frost Protection mode, it does not automatically resume heating in order to optimise energy savings. To bring the room back to the desired temperature, you must reactivate the heating via the thermostat.

If this behaviour is inconvenient:

• It is possible to disable the open window detection function via the thermostat and/or the mobile app on smart Wi-Fi models
• You can calibrate the sensor to adjust the temperature detection

At Bestherm, we offer several secure payment methods for your purchases:

• Credit/debit card: Visa, Mastercard, American Express
• Apple Pay
• Bank transfer
• PayPal
• Shop Pay

All payments are secured to guarantee the protection of your data and your transaction.

For the moment, payment in instalments is not available.

Our teams are actively working on developing this option in order to offer you greater flexibility in your purchases in the future.

All our products come with a 2-year warranty, which takes effect from the date of receipt.

For radiators fitted with an interchangeable thermostat and heated towel rails with remote control, the warranty is extended to 3 years.

Returns & refunds: within a maximum of 14 calendar days from the date of receipt — after this period, no returns will be accepted.

Procedure to follow:

• Submit a request via the contact form
• Return the products in their original packaging, complete with accessories and installation manual
• Return costs are the responsibility of the customer, except where the return is due to an error on the part of the seller
• Products returned poorly packaged, damaged or showing signs of use will not be accepted

Returns must be sent to the following address: DOMETRANS, 40 ROUTE D'ENNETIERES, 59175 TEMPLEMARS, FRANCE

If your product is under warranty, please contact our customer service team via the contact form, stating the reason for your request.

Our teams will do everything possible to provide you with a solution promptly.

Once the refund has been approved by our teams, you will receive a confirmation email. Timeframes vary depending on the payment method and may take up to 10 working days.

You can track the status of your order directly from your personal account on our website. Log in to view:

• The status of your order
• Delivery information
• Your purchase history

If you encounter a problem or have any questions, our customer service team is available to assist you.

A confirmed order cannot be cancelled from your personal account.

For any cancellation request, please contact our customer service team as soon as possible.

No, it is not possible to reserve products in advance. For logistical reasons and to guarantee availability, each order must be placed at the time of purchase.

We recommend completing your order as soon as you are ready in order to secure the product(s) you require.

To stay up to date with new products and restocked items, you can:

• Subscribe to our newsletter: receive the latest news, promotions and restock alerts directly to your inbox
• Follow us on social media: we regularly announce new products and the return of popular items

This way, you will never miss any news or availability updates.

Instagram : @Bestherm_France / Facebook : Bestherm_France

Your order will be dispatched within 48 working hours.

Delivery within France then takes 3 to 5 working days.

For orders of more than 5 items, delivery via the GEODIS carrier is arranged by appointment to ensure a secure handover.

International delivery is available, with a surcharge applied depending on the destination:

• Germany, Belgium, Luxembourg, Netherlands: +€6 per item
• Austria, Spain, Italy, Poland, Czech Republic, Portugal: +€10 per item

For Corsica, delivery is also available with a surcharge of €25 per item.

Once your order has been dispatched, you will automatically receive a tracking link by email.

When the parcel has been collected by the delivery depot, you will be able to modify your delivery address or date directly via this link, subject to available options.

Once the parcel has arrived at the delivery depot, it is possible to redirect it to a collection point* directly via the carrier's tracking link.

*Please note that certain large or bulky items may not be eligible for this option.

Since 2023, Bestherm has been proudly certified Service France Garanti. This recognition reflects our commitment to quality customer service, provided entirely in France.

You can contact Bestherm customer service via:

• The contact form
• Email: service.clients@hom-y.fr
• Phone: 03 20 47 05 37

Our customer service team is available Monday to Friday, 9am to 5pm.

As our items are large, dispatch follows the rule of 1 item = 1 parcel.

If you notice that one or more parcels are missing upon delivery, please begin by checking the tracking for each parcel. This will allow you to see whether a parcel is still in transit.

If you have any doubts, please contact our customer service team via the contact form, quoting your order number.

Our teams will do everything possible to provide you with a solution promptly.

First, please check the status of your delivery via the tracking link sent by email at the time of dispatch. If you have any doubts, please contact our customer service team via the contact form. We will forward your request to our logistics department, who will liaise with the carrier.

Our teams will do everything possible to provide you with a solution promptly.

If you are experiencing a delivery delay, we recommend:

• Checking your order tracking via the link received by email
• If the issue persists, contacting customer service via the contact form or by phone

Our team will assist you in identifying the cause of the delay and offer you a swift, appropriate solution to ensure you receive your products in the best possible conditions.

Upon receipt of your order:

• Systematically check the condition of the products in the presence of the delivery person and open the parcels

In the event of any apparent anomaly (damaged parcel, broken or missing product, re-taped packaging), record precise reservations on the delivery note, clearly stating:

1. Any missing or broken items
2. The condition of the parcel (open, crushed, damaged)
3. A description of the damage sustained
   

• You then have 48 hours from the time of receipt to send us a claim, accompanied by all necessary supporting evidence (photographs, etc.)

Important: after this period, and if these formalities have not been observed, the products will be deemed compliant and free from any apparent defects, and no claim will be accepted.