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Old 02-02-2011, 05:35 AM   #1
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Expected Life Of A Boiler


Hello,
What is the expected life of the boiler on a oil burner? I think my boiler was installed in 1989 because a permit for work was granted back then. Its a Wiel-McLain. I just moved into my house and learned that the reason my hot water supply from the oil burner boiler is poor, is because the coil is coated with lime and needs to be cleaned or replaced. So I have to make a decision to either have this done or replace the boiler, the burner or both. Opinions?

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Old 02-02-2011, 06:20 AM   #2
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Expected Life Of A Boiler


I would keep it and do the repairs. That is a very good brand of boiler and should last another 10 yrs. The burner may start breaking down and needing repairs at $300-500 each time so you have to decide whether you want the inconvenience of having no heat and calling a tech all the time. Burner can be replaced. I would try get another 10 yrs out of everything as a new boiler is expensive to install.

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Old 02-02-2011, 06:40 AM   #3
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Expected Life Of A Boiler


Thanks Yuri.
I was also thinking about having an indirect water heater installed because of the following:
1. Insufficient hot water for doing laundry.
2. Delivery of hot water to two bathrooms is the same.
3. I had to turn up the aquastat to compensate for the poor delivery.
4. After I turn down my room thermostat to 60 degrees during the day,
the oil burner will turn on about 6 times between 8:00 am to 5:00 pm to
reheat the water in the coil. So I think I need to get the coil cleaned or replaced when and if I install an indirect water heater.
Or can an indirect water heater be installed to bypass the coil?
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Old 02-02-2011, 09:26 AM   #4
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Expected Life Of A Boiler


I am not in the HVAC business, but from a personal perspective, the original Weil McLain boiler in our home lasted from 1971 to 2004 (33 years), and it still ran fine, but I figured that it was time. Now, from a second hand professional perspective, my HVAC guy told me that this was not uncommon for a Weil McLain, so, after assessing all of my options, that is what I bought to replace the original one.
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Old 02-02-2011, 10:34 AM   #5
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DexterII,
How was your hot water suppiled for showers, laundry etc?
Was it from the coil in your boiler or did you have something else?
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Old 02-02-2011, 10:51 AM   #6
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Sorry; it just occurred to me a few minutes ago that yours was heating your water for other uses as well. We have a separate water heater for kitchen and bath use, so the boiler is only for heat, and now that I am thinking about it, that could be a significant difference, as ours is essentially a closed system, whereas yours is constantly introducing fresh water.
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Old 02-02-2011, 11:42 AM   #7
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Expected Life Of A Boiler


Quote:
Originally Posted by rjordan393 View Post
Thanks Yuri.
I was also thinking about having an indirect water heater installed because of the following:
1. Insufficient hot water for doing laundry.
2. Delivery of hot water to two bathrooms is the same.
3. I had to turn up the aquastat to compensate for the poor delivery.
4. After I turn down my room thermostat to 60 degrees during the day,
the oil burner will turn on about 6 times between 8:00 am to 5:00 pm to
reheat the water in the coil. So I think I need to get the coil cleaned or replaced when and if I install an indirect water heater.
Or can an indirect water heater be installed to bypass the coil?
Ayuh,... Not yuri, but,...
The boiler in this house was New, back in the very early 70s,...
I put it in here, maybe 10 years ago, as the old 1 rotted into dust, from flooding in the cellar...
That's all been fixed now, 'n she's still doin' what it did in 1970...

I use the in-boiler heating coil for Dhw,...
If yer Handy at all,.. Cleanin' it ain't tooo bad of a Diy job...

To answer question #4,...
Yes, an indirect can be plumbed/ pumped as if it's a zone off the main boiler plumbing...
The boiler will fire Only when it calls, rather than holding the boiler up to temp...
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Old 02-02-2011, 03:12 PM   #8
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Expected Life Of A Boiler


Thanks Bondo,
That's good to know that I won't have to be concerned about the boiler coil when I install an indirect water heater.
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Old 02-03-2011, 01:05 PM   #9
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The answer is:

US cast iron about 30 years with reasonable care. Everyone should have an indirect-fired water heater especially if you have a condensing boiler. Indirect water heaters also last about 30 years if water is soft.

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