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Hot vs. cold water feed for steam boiler?
Can someone please explain why cold water should be used to feed the boiler? I have read this many times but have never seen an explanation.
When I bought my house in 2002 the boiler was fed with hot water. I am now doing some work and have the choice to leave it that way or switch it to cold. I think that one reason to use hot water is that it should already have some of the oxygen removed due to the fact that the solubility of gas in water decreases as temperature rises. Less oxygen --> less corrosion.
I cannot think of any benefit from using cold water or harm in using hot water.