Adding a water heater and not replacing the oil fired boiler

I had the oil company give me a quote for a new oil fired steam boiler and gas water heater. Now the boiler heats the water. I know a new system will save a lot more.
The estimator said I could not add a water heater and keep the same boiler. Why is not possible to do this or is he just interested in selling the hole thing to me?
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do you really want the boiler to run all summer just for hot water?
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Could be because part of the boiler's water jacket would not be cooled by the water heater. You need to know what is actually heating the domestic water
Whatever that is, if it can simply and safely be capped, end-of-problem. True, the boiler will not be "same" as before. Any competent plumber can give you the story as to your options with the boiler. Oil company people would hopefully be knowledgeable about the oil burner.
J
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On 2/9/06 10:38 PM, in article 1VTGf.30704$%i3.5888@trnddc02, "New &

The existing boiler may not have enough output, or place for one, or any number of other possibilities... It's also possible

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