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Old 11-19-2009, 10:27 AM   #16
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Originally Posted by Yoyizit View Post
I don't guess anybody makes aftermarket flue-mounted heat exchangers to capture your wasted heat
They are, or were made.
And could cause a host of problems themselves.

Since without it being serviced, he has no way to know how efficient it is now.
He can't determine what % it would improve by having it serviced, to determine if it would have a payback if he has it serviced.


sbmfj. What is your KW rate? And how many gallons of oil was the $1100.00?

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Old 11-19-2009, 12:06 PM   #17
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Last edited by Yoyizit; 11-19-2009 at 12:11 PM.
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Old 11-19-2009, 12:11 PM   #18
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Originally Posted by beenthere View Post
Since without it being serviced, he has no way to know how efficient it is now.
He can't determine what % it would improve by having it serviced, to determine if it would have a payback if he has it serviced.
Without mentioning the dreaded rules of thumbs, guesstimate!

Everybody knows it's less than 100% [!] and more than 1% [I hope].

Let's play 20 questions.
Reasonably, could the current efficiency lie in the interval between 10% and 30%? You HVAC guys are in the best position to make an intelligent and reasonable estimate of the low and high value boundaries of this interval.

Depending on your Interval Estimate and the fuel prices, the OP can make a guess as to the desirability of a service call.

If the numbers say "No" with the worst estimate of efficiency, then no call.

If the numbers say "Yes" with the best estimate of efficiency, then call.

Supplying numbers and likelihoods, and the price of a service call, puts the Decision ball back into the OP's court. This is where it should be, since we don't know the OP's
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Old 11-19-2009, 12:37 PM   #19
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Hi,

Im up in Canada, so we use the metric system. got a good rate, at about 65 cents a liter, so figure about 1700 liters give or take a few which works out to about 450 gallons a heating season/year. (3.78 litres to a gallon).

My further dillema ties in the oil tanks. If I go electric, no more oil tanks to deal with. I figure that when I update my heating system, Id perhaps replace the oil tanks, but if I were to transition to an electric boiler, Id save money on the tanks going forward. And when I rent out, dont have to deal with oil tank issues (ie tenants leaving w/o re-filling the tank) I know a poster mentioned you could sign somehting in the lease but it could be a pain.

Is there a good way to ID the manufacturing date of my oil tank, or when it was installed? Is there a standard way to check this? you can see my tanks in the first post.

Thanks for all the feedback, greatly appreciated!!!
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Old 11-19-2009, 12:59 PM   #20
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Im well aware that a service call wont improve the efficiency, not looking for that either. I was referring to a 'maintence call' where the guy will come and clean the boilers, maybce change a filter somewhwere. I had a 'parts plan' from sears when I first moved in. Paid about 150 for each furnace. Called for a routine check, and they sent the technicien over. He stayed maybe 15minutes for both. He turned the power to the boilers off, opened the door thats about at stomach height, and shop vac'ed it. That was it. Never really called him back. I had a friend that said a system like mine is a 'tank' (an inefficient one), and to leave it alone, unless it breaks. Says clenaing it can be a mess, as all the soot comes out etc...

I simply want another opinion. I havent cleaned it in the past 5 yrs, and wondering whether I leave it as is, or schedule a clean. Maybe I could do it myself? Then this is where the chimmney questions comes into play. should I have it cleaned. does an oil boiler heating system leave allot of reside in the chimney?

Thanks!!!
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Old 11-19-2009, 12:59 PM   #21
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oh, and a flue is simply that big duct from the boiler to the chimney?
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Old 11-19-2009, 02:22 PM   #22
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Steady State Efficiency of that boiler with that burner. Could be as low as 65% or as high as 77%.
AFUE, could be as low as 45% to as high as 70%.

A service call, By a good oil tech can improve the AFUE considerablly.
And get the SSE as high as possible for that burner.
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Old 11-19-2009, 02:26 PM   #23
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At 450 gallons of oil, at 72% combustion efficiency. It would take 13,185 KWHs. To give you the same amount of heat.

So your electric rate, would have to be less then $0.084 per KWH, to save any money at all.

At 7 cents per KWH, it would cost you roughly $922.00 for the same amount of heat, from electric boilers.
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Old 11-19-2009, 03:59 PM   #24
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Quote:
Originally Posted by beenthere View Post
Steady State Efficiency of that boiler with that burner. Could be as low as 65% or as high as 77%.
AFUE, could be as low as 45% to as high as 70%.

A service call, By a good oil tech can improve the AFUE considerablly.
And get the SSE as high as possible for that burner.
This is why this forum is paying you the big bucks!

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Last edited by Yoyizit; 11-19-2009 at 04:02 PM.
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Old 11-19-2009, 04:02 PM   #25
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This is why this forum is paying you the big bucks!
The question is seldom "is a service call worthwhile"

Its almost always "is the service tech you get for that service call worthwhile".
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Old 11-19-2009, 04:10 PM   #26
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Originally Posted by beenthere View Post
The question is seldom "is a service call worthwhile"

Its almost always "is the service tech you get for that service call worthwhile".
Is there a way to tell, before-the-fact? I guess you need to ask questions about credentials. I find that people perk up and listen if you sound like you know what you're talking about when you make the service request. Like if you say specifically what you want checked, and how.

And if the tech is bad, does the HO always know he/she got low value for his/her money?

Last edited by Yoyizit; 11-19-2009 at 04:14 PM.
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Old 11-19-2009, 04:14 PM   #27
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Quote:
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Is there a way to tell, before-the-fact? I guess you need to ask questions about credentials.

Not really. I know of NATE certified techs, that can't set up an oil burner right. And the cert is in oil.

And if he/she is bad, does the HO always know he/she got low value for his/her money?
Usually not until the damage is done. Or the repair is found to be not the correct repair.
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Old 11-20-2009, 10:54 AM   #28
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hi again,

any brands that you guys would recommend for either an electric or oil fueld boiler? Id like to reasearch their respective efficiency with respect to their fuel source.

Thanks
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Old 11-20-2009, 04:29 PM   #29
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Electric is 100% efficient.
Oil, at best you'll get 87%.

The question is NOT how efficient the boiler is. But how expensive the fuel is.

Here is a cost comparison for you. In this one. I used oil at 80% efficiency compared to electric at 100% efficiency.

Oil at 80% efficiency. Electric at 100% efficiency.

Your electric rate must be under the KWH rate on the left. To be cheaper then the oil price on the right.

KW rate. Oil per gallon.
$0.06 - $1.97
$0.07 - $2.30
$0.08 - $2.63
$0.09 - $2.96
$0.10 - $3.28
$0.11 - $3.61
$0.12 - $3.93
$0.13 - $4.23
$0.14 - $4.59
$0.15 - $4.92
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Old 11-20-2009, 05:09 PM   #30
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I wonder how much efficiency that old boiler has? Probably very little so in theory an electric boiler may cost less to operate. If it sprung a leak then a higher efficiency oil boiler would be a better choice.

Thermolec makes electric boilers and they are made in Quebec and are a well established good company/product.
http://www.thermolec.com/contact.htm

http://www.thermolec.com/boilers.htm


Last edited by yuri; 11-20-2009 at 05:11 PM.
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