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Valves Not Included

Ultra Colosseum - High Gloss Black Triple Radiator 1800mm x 381mm

Ref: HXB12


Availability: In Stock

    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: 

The Ultra Colosseum 1800x381mm Triple Radiator in high gloss black means you can add a touch of hotel luxury to any room in your home.

Positioned upright to save on space and make a feature of this stunning radiator, the Colosseum is ideal for small bathrooms and en-suites where space is essential.

All radiators by Ultra are produced to work to the highest standards and this radiator is no exception offering a 8226 BTU rating. The impressive BTU output ensures your space is heated quickly and effectively to a comfortable warmth.

Please note: radiator valves are not included.

Ultra Colosseum Gloss Black Triple Column Radiator Features:

  • Glossy black finish
  • 1800mm x 381mm
  • Eight columns
  • Vertical design to save space
  • Classic styling
  • BTU: 8226
  • Watts: 2411


StyleVertical Traditional Column Radiator
Pipe centres (mm)471 (mm approx)


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