1 Flue, 2 Fuels?

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ntp71
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Post Fri. Feb. 22, 2013 7:53 pm

Hello,

Before I added my coal stoker to my chimney, I first placed the Gas Furnace on a Power Vent. Now the Gas Furnace is used as a supplement heat to the Coal Stove. I believe after I insulate the Basement Ceiling I will be burning very little GAS.

My question is....Did I need to put the Gas Furnace on the power Vent, or could I have left it vented into the Chimney? Can I have 2 different fuels(Coal and Gas) in one Flue?

In case you are wondering, it was not feasible to put the coal stoker on the Power Vent so I opted for the Gas furnace figuring it wouldn't be running much.

Thanks again.

Neal


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Wiz
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Post Fri. Feb. 22, 2013 8:39 pm

No. Insurance will not insure you, any lost from fire will be out of pocket expense. Also code violation.

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ntp71
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Post Fri. Feb. 22, 2013 9:13 pm

OK.. Thank you

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Berlin
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Post Fri. Feb. 22, 2013 11:01 pm

Actually, that's not entirely true. Unless it's fraud, insurance will insure you. Knowing it's not smart to smoke in bed, if you do it, fall asleep, and thusly light the house on fire, you will be covered. This is a common misconception about insurance, they WILL actually insure and cover just about any stupid thing you do which causes a loss.

Now that that's debunked, there is really no danger to running two appliances with one flue even using two different fuels - in fact, the code in most states allows it specifically in the cases of mixing NG/oil/propane. There is a proper way to plumb the appliances based on forced/atmospheric draft and which is most draft sensitive. There is a code prohibition on involving 'solid fuels' in the same flue as the others however. This is due to wood's creosote production and a fear of allowing combustion air into a raging chimney fire. As coal produces NO creosote whatsoever, this is a non-issue and one that has been overlooked when the rules (codes) were made.

Can it be done safely? yes. Would I recommend others do it in a proper way? yes. Would I recommend it to a friend? absolutely. Will your insurance cover a loss on your home if something, somewhere isn't exactly to code? yes. Will it be "to the letter" of code in most states? No.

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Wiz
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Post Sat. Feb. 23, 2013 7:05 am

Call your insurance company.. I was declined home owners insurance for this reason, but it was wood boiler and oil boiler using same flue. If you search this question you'll get 2 answers yes you can and no you can't.
Last edited by Wiz on Sat. Feb. 23, 2013 7:16 am, edited 1 time in total.

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Wiz
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Post Sat. Feb. 23, 2013 7:08 am


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Lightning
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Post Sat. Feb. 23, 2013 7:50 am

Berlin, I installed my furnace the best I could with safety being a primary factor. I didn't have a pro inspect it and I never told my insurance company. Your saying they will still cover me if I accidentally have a house fire caused by it?

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Wiz
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Post Sat. Feb. 23, 2013 8:15 am

Lightning wrote: I never told my insurance company. Your saying they will still cover me if I accidentally have a house fire caused by it?
I rather be safe then sorry. ;)
Last edited by Wiz on Sat. Feb. 23, 2013 8:20 am, edited 1 time in total.


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MoBe
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Post Sat. Feb. 23, 2013 8:18 am

It seems this changes like the weather. I was always under the impression one device per flue.... However, my uncle just had an inspection by his insurance, he has an oil boiler and an AA130 in the same flue. He was told as long as they are interlocked and cannot run at the same time it's ok..... I have also had people give me boilers to tear out because insurance said the would no longer cover the dwelling if there was a coal boiler in the basement. As I said changes like the weather

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SMITTY
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Post Sat. Feb. 23, 2013 3:46 pm

When I first moved in here in '03, the insurance company sent me a drawing (along with the pile of paper you get when you first open a policy) showing a wood stove & and oil burner in THE SAME FLUE. It said right on the paper that the wood stove had to be BELOW the oil flue - why, I have no idea. 2 years later when I decided to go with coal, all of a sudden they did a complete 180° - the lady just about jumped through the phone for me mentioning it! " WOOAH! YOU CAN'T DO THAT!!!!" :roll:

So, WTF changed in 2 years? :lol:

So with that, instead of spending $2k on a new chimney (that's the LOW end out here), I just used the hole that was already in the chimney for the coal stove. Been burning 8 years now, without ONCE EVER hearing my CO detector. Yeah, it works - brought it out in the barn & within 30 seconds of starting my motorcycle, it was screaming.

I just changed the battery today - date I always write on them said January '10 - not bad! :D

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coaledsweat
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Post Sat. Feb. 23, 2013 3:52 pm

Burnham Boiler's recommendation.

Vent Coal Stove With Oil Furnace?

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ntp71
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Post Sat. Feb. 23, 2013 10:01 pm

I really appreciate all of the replies. Looks as though I will just leave my set up the way it is. Gas Furnace to Power Vent, and Stoker to chimney. However, for now I will leave the Gas Water Heater to chimney.

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SMITTY
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Post Sat. Feb. 23, 2013 10:09 pm

The thing with gas is, if ever the pilot extinguished, the potential for an epic explosion is pretty high when a solid fuel appliance is vented to the same flue. :shock:

beemerboy
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Post Sat. Feb. 23, 2013 10:29 pm

I would do oil and coal in the same flue, but gas, I would have on its own.

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Berlin
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Post Sat. Feb. 23, 2013 11:10 pm

really smitty, really? :roll: y'r killing me

That's not going to happen for so many reasons it's not worth going through. This potential pilot light/same flue danger ranks right up there with the risk that crumbs spilled on the kitchen floor might spontaneously combust.

I really don't know why people seem to think there is some kind of magic at work here... there isn't. This is really quite simple, it's not to "code" because code was written with a specific danger in mind and that involves burning WOOD. Chimneys are really quite simple things - the complexity comes from deliberate obfuscation of the how they perform and their safety by those with an agenda. As far as safety goes - plumbed properly there's no safety issue as long as you're not burning wood.

In my own home I have two gas appliances and my stoker furnace in the same flue; it works very well, I wouldn't have it any other way. More importantly there's no legitimate reason for anyone else to have it any other way with one exception. The only legitimate exception is that they want to follow code in their location, not to make puppies happier, not appease their insurance man, not to make their home "safer", but simply because they want to follow the code.


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