Can anyone remind me where the I can find the table showing heat capacities for copper pipe, the one you use to check your pipe work can supply all of your radiators?
To what extent do the results apply to plastic pipe? Since they have roughly the same internal diameter, they must carry more or less the same amount of water, but I'm assuming copper looses more heat from its surface, so does that affect the results?
Is it fair to say that it is best to use 22mm flow and return pipes and tee of 15mm pipes to the radiators? That's how I have always seen it done but this house is 15mm everywhere. Part of me thinks, if it's not broke, don't fix it, but whilst decorating I want to move some pipes that run up the walls and look ugly, so I'm wondering about upgrading it. Would using 22mm make it warm up more quickly, or would it have the opposite effect as there would be more cold water inside the pipes to move first?
I will be upgrading the boiler to a condensing one, so I will need to resize the radiators.
I seem to remember two radiator calculators being recommended here. I think one was Myson; what was the other and where can I find them - I suppose google?