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Spend £250 Or More & Get Free Delivery/Save 10% On Towel Rails *Discount Applied To Towel Rails Only* Spend £250 Or More & Get Free Delivery/Save 10% On Towel Rails *Discount Applied To Towel Rails Only*
Pre-Filled and Element Included

Milano Alpha - White Horizontal Single Slim Panel Electric Designer Radiator 635mm x 420mm



Availability: In Stock

  • 15 years guarantee
    ON ORDERS ABOVE £250.00

BTU Calculator

Radiator efficiency, is measured in British Thermal Units (BTU). The dimensions of a room are used to calculate the BTU output required to heat that room. Radiators all have a known and calculated BTU output. Using the BTU outputs in the Product Specification or description above, it is easy to calculate the size of radiator you need to help provide the total heat output necessary for your room.

How to calculate BTU requirement

The best way is to ask your plumber to perform the calculation for you. If you don't have access to a plumber, you can use the BTU Calculator below as a guide. Please note that the calculated figure relates to the combined heat output of all radiators in the room, therefore the towel rail or radiator that you purchase need not satisfy the entire BTU output if it is used to complement existing radiators.

This calculator is for guidance use only.

1. Please select your required units
Metric (metres) Imperial (feet)
2. Please enter room measurements
Height of room:
Width of room:
Length of room:
Window Area x²:
3. Please select type of room:
4. What is below the room?
5. What is above the room?
6. Please select type of outside walls:
7. Please select type of windows:
8. Please select number of outside walls:

Watt/BTU requirements:
Watts Required: 
BTU's Required: 

Essential Extras Available (will be displayed when product added to basket)


The Milano Alpha 635x420mm white single panel electric designer radiator is perfect for enhancing any modern interior. Made from mild steel to ensure long lasting durability, this electric designer radiator features a white finish and slim panels for a cool, contemporary look.

Ideal for the bedroom, lounge or dining room, the designer radiator is supplied with a 400W Bluetooth heating element, which features five temperature settings and a dryer mode with timer. It also has Bluetooth technology, which allows communication with the Terma BlueLine mobile app. The app allows you to manage several devices simultaneously and you can program as many heating cycles as you require. The heating cycles can be assigned to specific devices, and you can personalise the settings of each element such as the time and temperature.

The Alpha electric designer radiator produces an impressive heat output to quickly create a warm and comfortable space. The electric radiator has been pre-filled with a water based heating solution called glycol, which helps to reduce rust, noise and limescale.

The electric designer radiator will have sealing caps upon delivery, but you will need to unscrew one to fit the heating element. The hardwiring should be carried out by a trained electrician.

Please note: the heating element will be sent separately from the radiator.

Milano Alpha Designer Radiator Features:

  • Colour: White
  • Made from mild steel
  • Dimensions: 635 x 420 x 46mm
  • Contains a water based heating solution (glycol)
  • 1 x 400W Bluetooth Heating Element Included (Equivalent to 1365 BTUs)
  • Heating element has five heat settings ranging from 30C to 60C
  • Tested to BS EN 442 Standards
  • ISO9001:2008 Registered Manufacturer
  • CE Marked


Dimensions (H x W x D)635 x 420 x 46
Element Guarantee2 Years
StyleElectric Radiator
Width (mm)420
Height (mm)635
Output (watts)400
Output (btu)1365
Pipe centres (mm)520 (mm approx)
Projection From Wall (mm)64mm
Wall to Centre Tapping (mm)38mm
Guarantee15 Years


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