It’s crucial to find a radiator that’s the right size for the room you’re trying to heat

Radiator styles often come in a range of sizes, so you’ll be able to find one to suit. To estimate what size you need for your room, use this calculation: work out the volume of the room in cubic metres (length by width by height), then multiply by 50 for lounges and dining rooms, by 40 for bedrooms, by 30 for kitchens, and by 90 for bathrooms. Add 15 per cent for north-facing rooms, 20 per cent if you have French windows, 10 per
cent for very exposed sites or very cold climates and deduct 10 per cent if you have double glazing. This will give you the output in watts you need. B&Q have an online radiator calculator, as do Bisque. Alternatively, consult a qualified heating engineer or a specialist retailer.

You’ll also need to bear in mind factors such as the location of your home and how exposed it is – buildings situated in open space and windy regions lose heat at a higher rate than identical buildings in more built-up areas. Older homes are usually less well insulated and need more heating, and if the house has poor-quality windows you’ll need to generate more heat. Rooms without external walls are usually warmer. Remember too: bathrooms and living rooms tend to need more heat than bedrooms.

Words: Trish Lorenz   Image: Bisque