electric water heater in series

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Old 11-28-19, 04:41 PM
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electric water heater in series

Hello , i need to replace my indirect fired , and i have a question , if i replace with a electric water heat , i will save money in the end of the year ?

the cost of the indirect and hybrid electric water heat is the same , and i already have the line for the indirect , if i use my furnace for heat the water and put in in the electric water heat for mantain it hot and help to heat, i will save money in the end of the year or i will spend more ?


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Old 11-28-19, 04:52 PM
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hello. so you have a boiler not a furnace correct?

What type of fuel do you use? Natural gas, oil, propane?

You will need to compare rates of fuel vs electric. There are many variables.
 
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Old 11-28-19, 06:06 PM
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hello , i have a boiler that heat the radiator and the indirect water heat , is oil , the rate now is $2.39 for oil and $0.25 cent for kw ,
but if i understood right , the boiler heat the water , it goes into the indirect for mantain hot , when it start to be cold , it send the water back to the boiler for heat again , if i put a electric water heat after the oil boiler , the electric will mantain hot by it self , will be cheaper than restart the oil boiler ?

i saw this number online , and the heat pump electric is almost the same price of the indirect fired , but if i put the electric after the boiler how it will be ?

thanks a lot
 
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Old 11-28-19, 08:04 PM
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you sure yor electric rate is .25? Just keep what you have. Money spent on a heat pump heater with not offset savings. Heat pump water heaters are over 1000 bucks.

and adding an electric standard water heater is just adding another energy source to maintain temp. you'll be paying more IMO.
 
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Old 11-29-19, 04:20 AM
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I just paid the electric bill 132.31 for 565kw = 0.2341 for each kw.

thats why i asked a 50gallon hybrid water heater , cost $1200 the indirect fired ( same model of what i have now , an amtrol 41gal ) is $1100 , so is the same thing.

so i dont know how calculate how much cost mantain the water hot with the electric boiler after the oil boiler. For understand if cheaper mantain hot with the electric or turn back on the oil boiler
 
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Old 11-29-19, 04:57 AM
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If water heaters are connected in series then the last one has to be operational all year long.

If gas or oil is used for your heating boiler with indirect domestic hot water then you will still save money some of the time with a stand alone water heater following even if the latter is all electric.
 
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Old 11-29-19, 07:30 AM
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amtrols have a lifetime warranty as I understand it.. The indirect should cost you nothing.

Plus there are many variables.

Whats your aquastat settings set to? ( maybe too high and wasting fuel)

Most likely its a warm start boiler. If you make the aquastat a cold start you can save probably a tank of oil a year.

This issue is some boilers once s warm start need to stay warm start. some when you make them cold start then tend to leak a bit. But you would need to try it out.
 
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Old 11-29-19, 07:37 AM
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And for what its worth I would install a HTP superstor to replace that amtrol. More efficient with less BTU,s needed to reach hr ratings.

If it were me I would install a SSC 35. That should be plenty of hot water.

The SSC35 only needs a 53k btu boiler to reach its hr rating.

About 140 gallons per hr @ 120f water. Now if you have a 100k btu boiler double it.

Thats great performance IMO and will save you fuel by heating up very quickly.

HTP - SuperStor Contender Indirect Water Heater

manual

http://www.htproducts.com/literature/lp-65.pdf
 
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Old 11-29-19, 12:12 PM
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I checked in their website , and it have a 7y warranty , and just first owner ( im not the first owner , i dont have the receipt of it ) , so honestly i didnt call the company for check it.

about the electric water heat , i can put a second pipe from the mainline direct to it , and in summer switch from the boilerline to the main for shut off the oil burner , but in case of power down i cannot use it.

honestly i dont know , the brand that you suggest , the 50gal , (i need more then 40 for fill the tub ) is like a $1500. The 41gal amtrol $1050 , the electric $1200 , but masssave rebatw $600 on the electric and $200 on the oil.

i dont know , is a hard decision
 
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Old 11-29-19, 02:51 PM
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shut off oil boiler for summer it may start leaking.. youll have to see.

But what ever your trying to do, its my opinion it will be a mistake. let us know how it turns out.
 
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Old 11-29-19, 02:55 PM
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They are 700 bucks. What tub do you have?

https://www.afsupply.com/htp-ssc-35-...caAt9PEALw_wcB
 
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Old 11-29-19, 03:43 PM
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A standard tub , with the 41g , i fill the tub and after someone would like to have a shower the water will be cold , so in case a little big bigger will be better i guess
 
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Old 11-29-19, 03:48 PM
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How many BTU is your boiler? Should show input on name plate.

Make and model please.
 
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Old 11-29-19, 03:50 PM
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And how is the boiler and indirect set up? Zone valves? Separate pump for indirect?

You need to make indirect priority
 
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Old 11-30-19, 12:52 PM
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What country are you in? ...................
 
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Old 12-05-19, 02:27 PM
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I found a used htp , model said "50 household storage tank water heater " , is it the indirect? Is like new and asked just $100 , so is a good deal , is it that one you suggested?

thanks
 
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Old 12-05-19, 04:03 PM
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Last edited by vercelli; 12-05-19 at 06:35 PM.
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