Choose by Heat Output (BTUs: 1500-11000)

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Radiators by Heat Output – 1,500 to 11,000 BTUs

Choosing a radiator by its BTU output is the most reliable way to ensure your new radiator will heat your room effectively. This collection brings together radiators across the 1,500 to 11,000 BTU range — covering everything from compact radiators for small bathrooms and en-suites through to higher-output models for larger living spaces.

What is a BTU?

BTU stands for British Thermal Unit — the standard measurement used to describe a radiator’s heat output. The higher the BTU rating, the more heat the radiator produces. Matching the right BTU output to your room size and insulation level is essential for efficient, comfortable heating.

BTU Guide by Room Size

  • 1,500 – 3,000 BTU — ideal for small bathrooms, en-suites, and compact hallways
  • 3,000 – 6,000 BTU — suitable for average bedrooms, studies, and medium-sized rooms
  • 6,000 – 9,000 BTU — well-suited to larger bedrooms, dining rooms, and open hallways
  • 9,000 – 11,000 BTU — designed for larger living rooms and open-plan spaces

Shop by BTU at Tradeplumbing

Browse our full range of radiators filtered by heat output and find the right BTU rating for your room. All radiators are compatible with standard UK central heating systems and available with fast UK delivery.