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## Main Question or Discussion Point

I'm trying to find the size of pipes that are to carry a certain amount of heat in them, 6000 W. This formula should give me the amount of water needed:

m=W/(4200*delta T)

Delta T is 20 degrees (the diff between supply and return), but what I don't get is that if I increase the supply and return temperatures to the extreme, shouldn't the radiator or whatever get increased effect? According to this formula it won't, since only the diff between the two temperatures is used. Can someone explain this to me??

m=W/(4200*delta T)

Delta T is 20 degrees (the diff between supply and return), but what I don't get is that if I increase the supply and return temperatures to the extreme, shouldn't the radiator or whatever get increased effect? According to this formula it won't, since only the diff between the two temperatures is used. Can someone explain this to me??