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Author:
salmonroy (MI)
I have a old boiler system that heats the house and I fed by a small 30 gallon hot water heater. I am wondering if I can hook up a 50 gallon tank in tandem with the 30 so we have hot water for showers?
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Author:
packy (MA)
not if the radiators and/or piping are iron.
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Author:
hj (AZ)
The heating and domestic hot water systems should be separate, but we would have to know more about your installation to be sure.
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Author:
packy (MA)
i have actually seen just one combination domestic water and hydronic heat set up. the installer was pretty clever. he had a 40 gallon gas water heater with a pressure reducer set at 25PSI. all the components were non-ferrous. the circulator was bronze, the expansion tank was stainless etc. it was a very small cottage with one bath and kitchen. if i remember right there was about 30-35 feet of copper fin baseboard heat.
he had no problem with rust and the 25 PSi was adequate for his needs.
i also seem to remember he had his bronze circulator running 24/7 in the colder weather to prevent freezing the basesoard with a bronze zone valve to open and close the heat (which he didn't use much).
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