BTU Values for these radiators

[chriselevate]

I am looking to change three radiators in my house and wondered if anyone could give me the BTU out for these as I'm thinking about changing the size of the new ones as they should be more efficient and output more heat.

Radiator 1

Dimensions 198cm width x 72cm height

Radiator 2

Dimensions 95cm width x 60cm height

Radiator 3

Dimensions 159cm width x 72cm height

If you need any more information please let me know but I've tried to be as thorough as possible.

Thanks for you time and help on this.

 

[TCCHeating]

http://www.pipecasings.co.uk/downloads/download files/Radiator Output Calculator.pdf

Use this pdf to calculate the output of the rads in watts. To convert watts to btus multiply by 3.4

 

[D_Hailsham]

http://www.pipecasings.co.uk/downloads/download%20files/Radiator%20Output%20Calculator.pdf

The info given in the Introduction is very misleading. The output of current rads are measured with a differential of 50C (room temp 20C; mean rad temp 70C). Older rads were measured with a differential of 60C (room 20C, mean rad 80C).

You therefore have to multiply the outputs obtained using this guide by 0.89 (see table on page 9), to be able to compare with the outputs you see in the shops.