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Posted by Bubba on November 12, 2007, 6:09 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?
And again, as you pointed out on that 60% eff furnace, you are only
capturing about 60% of that but since the blower isnt running the heat
cant be "scrubbed" from the heat exchanger THUS goes right on up and
out the chimney. Furnaces are also lined with insulation around the
inside of the furnace further preventing heat from radiating out into
the home.
>
>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."
>
Again, remember this isnt a steel or cast-iron wood stove sittiing out
in the middle of your living room able to radiate any heat into the
living space.
>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.
and again, having the EE brain of yours and thinking in labratory
terms you miss the real life concept.
The pilot and burners are on. The furnace heats up and blows the heat
into the living space. The burners shuts off when the temp is
satisfied and in a min or two the blower goes off. Now you have a warm
heat exchanger, a pilot running and a nice warm chimney. Say HELLO to
your nice new vacuum cleaner sitting atop your home.
>
>> 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.
I think you just like to argue. You can read and type all the articles
you want. Your furnace SUCKS and it SUCKS real well..............right
up the chimney. Keep living in the past. Hang onto those old ideas and
old equipment. I'll move on with the times and use efficient
equipment.
$6.70 a month for your pilot........hehehe. I think you should do your
own experiment and try that. Turn off everything except one pilot. At
the end of the month, tell me what your bill was. Im sure it will be
$6.70 :-P
Bubba
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