Electric Hot Water
Posted in Uncategorized on 09/04/2007 10:29 pm by adminA look at what is currently available on eBay
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Electric hot water heater piped into the boiler?
We just bought a house that has a 50 gallon electric water heater that has the cold line of the water heater piped into the boiler. What is the purpose of this? Also it has a "Fast fill" valve. What is this?
Hi Mike,
I'm really shocked that with all the "professionals" giving you advice, no one's hit the nail on the head YET, until me, of course.
I live in New England, and see this configuration all the time. We have one heck of a long heating season here. Let me explain the reasoning behind what you have, because it is used constantly in this part of the country.
Your electric hot water heater can be expensive to run, and if you have several people standing in line for showers in the morning (like mine), can find itself unable to "recover" the water temp after a shower or two.
Since your boiler will run extensively during the heating season anyway, they are using the boiler to pre-heat your supply even before it gets to your water heater. It evidently has a small "tankless" water heater that couldn't keep up with the household demand, necessitating additional capacity. The aquastat that is in the main boiler (for the boiler's water heater) is certainly disconnected, so it will only pre-heat when your heat is being run. The free-standing water heater is on it's own in the non-heating season.
This is a very "green" way to exploit as much value as humanly possible from every gallon of oil burned, and you had to run the boiler anyway!
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