What BTU is this old radiator?

What BTU is this old radiator?

What BTU is this old radiator?

Anyone know how I can tell what BTU these old radiators are? Theres one in every room, all the same so clearly not designed to be fit for each room.... 136cm wide. 60 cm tall. ..Look like some old standard type?? Want to know BTU for comparison purposes with new ones...

by PeteMars

This has been automatically posted in the DIYNot Forum on DIY Talk. The new DIY Forum