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Posted by Noon-Air on November 11, 2007, 9:55 pm
> Bubba wrote:
>
>> >> you are most likely burning an extra $20 a month each and
>> >> every month which amounts to $240 a year you just pissed away.
>> >
>> > I dispute your $20 / month.
>>
>> Dispute all you want. In case you havent noticed, natural gas
>> does nothing but go up and up each winter. Right now its in
>> the "ridiculous" price range.
>
> According to this:
>
> http://www.energyideas.org/default.cfm?o=h,g,ds&c=z,z,4407
>
> A furnace pilot light uses about 21 cf per day - and this number was
> arrived at from 2 different sources.
>
> I'm paying about 1.05 cents per cf for my NG (33.43 cents per cubic
> meter, including the gas itself and a few other costs like
> transportation and storage).
>
> So I'm paying 22 cents per day to run my pilot light. The average
> month has 30.4 days, so I'm paying $6.70 per month to run my pilot
> light.
>
> This page:
>
>
http://oee.nrcan.gc.ca/publications/infosource/pub/home/Heating_With_Gas_Section6.cfm
>
> Says that the difference between a standing pilot light furnace (60%
> AFUE) and one with an electronic ignition can be as little as 2% more
> efficient (62 - 67% AFUE). The fact that it also has a vent damper
> should also be noted - the damper is no doubt preventing interior heat
> loss through the flue when the furnace isin't running.
>
>> > the heat put out by the pilot is (mostly) captured within your
>> > house anyways, and during the heating season heat (from all
>> > sources) is desired.
>>
>> ??? WTF! Since when does a pilot flame go into your house?
>
> It's a flame burning *in your house*, no differently than the burners
> which are also flames burning *in your house*.
>
> If your furnace is capturing heat from your burners, when why can't it
> capture the heat from your pilot as well? Or is that a strange
> concept for you?
>
> Note the following (quoted from the first link I posted above):
>
> "Another important point is that the heat from the pilot is
> usually not all lost during the heating season. In most
> stoves and furnaces, much of the heat from the pilot finds
> its way into the building."
>
> Also note that your argument about the pilot being wasted heat doesn't
> apply when the burners are actually on (because the pilot is adding
> it's own paltry amount of heat to the burner output). The colder it
> gets outside, the more often the furnace burners are on (the duty
> cycle of the furnace increases) and the percentage of time that only
> the pilot light is on goes down.
>
>> The colder it is outside and the more heat you apply inside
>> increases the suction of that flue.
>
> So when only the pilot is on, you wouldn't get much heat, which means
> you wouldn't get much suction, which means more of the heat from the
> pilot would remain in the furnace - keeping some localized part of the
> heat exchanger warm in between calls for heat.
>
>> Now, tell me once again how well and cheap that 30 yr old
>> furnace of yours is doing.
>
> The efficiency of the furnace is not a function of whether or not I
> have a standing pilot light or electronic ignition. The MUCH bigger
> efficiencies come from having more efficient heat exchangers, or
> motorized vent dampers, or scavanging heat from the exhaust to heat
> the combustion intake air.
OK... so if your so knowledgeable, then WTF are you doing here, other than
trying to stir up shit?? Why are you not a licensed, insured
tech/contractor?? Oh... thats right, you have a<gasp> EE that will do you
about as much good in the real world as an advanced degree in liberal arts.
KMA and welcome to my killfile
*click*
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