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BTU Calculator
Unsure what radiators you need for your space? Use our simplified BTU calculator to help you on the journey to choosing the perfect radiators for your project!
Select the room you plan to heat and enter your estimated dimensions; our BTU calculator will work out the heat output you require to enjoy a warm and toasty home.
Please note: Our BTU calculator assumes your home is fitted with double-glazed windows rather than single-glazed windows. BTU ratings provided are approximate. We would always encourage you to seek assistance from a qualified heating engineer as they will account for additional factors such as walls, doors, and window sizes.