Author Topic: Keep Warm This Winter Just by Burning One Candle!  (Read 7344 times)

Abha

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Keep Warm This Winter Just by Burning One Candle!
« on: December 06, 2010, 06:52:11 PM »
I was doing a little research on how to make a low tech heater and I found this. One of the great things about it is that even though it is being sold on a website for around $30, they tell you how you could make your OWN.  ;D This is only available Stateside, but since they tell you how to make them, essentially they are available to anyone who can make one.

I also posted this on the Snow thunderstorm thread.



A friend emailed me a few days ago, ((waves to G.)), busy with industry as he built himself a heater of such revolutionary (but not new) proportions, that the Envirowarrior became excited and felt compelled to pass this marvel on, to all who would see and hear, and venture forward to save energy and money. All who would stay warmer this winter for the simple cost of a few candles. . (?)

Not possible you say, well guess again, as this ingenious invention is so simple a child can built one and a couple of these will set you up as warm as toast this winter, for about $5 per week!




The Technical stuff goes something like this : Steel has the ability to approach the temperature of its heat source, so the Steel Inner Core is driven to Very High Temperatures of around 500-550 deg. Fahrenheit, by the burning candle flame which converts it into a very hot Internal Radiator.

The intense heat of the Steel Inner Core is transferred into the Three Ceramic Modulators (or pots), one into the other. The High Inner Temperatures are gradually reduced by the Increasingly Thicker Walls and Larger Surface Area of the modulators (outer pots).



The outer surface of the radiator itself becomes a Dry Heat Radiating Body with surface temperatures of 160-180 degrees Fahrenheit which covers an area of over 88 Square Inches (double that for cms).

Whilst the manufacturers claim that one of these will not heat up a room entirely, they say it will add to the heat in the room significantly, which is brilliant if you are burning fragrant scented candles anyway! However, if you have a couple of these burning in one room, you will find that it would significantly warm the ambient room temperature for the cost of a couple candles, otherwise wasted (for me that means saving incense money too, double bonus!)


You*ll find all you need to know on How to Make a Kandleheeter but a word (or two) of caution here too, if you are making one yourself. Take note that the head of the bolt is visible in the photo and would be a serious burn issue. It is covered by a ceramic cap in the finished (bought) unit. The cap is attached with high temperature cement. So you will need to consider this if you have small children, who should be asked to treat this as they would any naked flame or heater.

Also too you are asked to always make sure it is on a firm flat surface away from any drapes or soft furnishings. You will find all the things you need to know on the website.


It makes sense too, to remember that this thing is radiating heat so the candle will eventually melt unless you put it into a glass container, or better still get one of those oil burners with a wick.

To make the stand yourself : See the movie on how to fold it properly.

Please note: that the first time you use your kandleheeter it will not radiate much heat as it takes about eight hours to *dry out* the terracotta pots properly.




You will see that there are electric versions available which means you can turn your ambient lamps/ lighting into thermal heaters all around your room, without all the soot!

On that note, if using candles, the manufacturers also advise that the Kandleheeter COLLECTS SOOT!


I shamelessly copied all of the above, but hopefully it might prove useful to someone??


Location: PNW--Seattle

pamela

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #1 on: December 06, 2010, 07:32:12 PM »
sitting here in this cold room hugging my oil  radiator heater, I'm feeling inclined to build on of these heaters. LOL
or two or three.  ;D
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Meg

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #2 on: December 06, 2010, 07:34:06 PM »
Okay... I understand that it takes in heat from the candle and then releases it into the room.

However surely the burning candle releases heat directly into the room without this?

I mean where else but into your room would the heat go from the burning of the candle?  And the candle will not release more heat because of this device on top of it?

So how can it increase the net effect of the candle burning?
N.Ireland

Gromit

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #3 on: December 06, 2010, 07:53:16 PM »
My thoughts exactly Meg. The only thing I see is that a "naked" candle heats air (+ burning paraffin but it goes into the air, so let's just say "air") and causes convection, so hot air rises and mostly heats the ceiling. The ceramic/clay assembly "traps" the heat and probably causes less convection, mainly (or partially) radiating the heat in all directions.

If the above is true, then it may have some effect, in the sense that you will feel more warmth from this lamp than from hot air above your head. But you're right, the amount of energy the burning of a candle produces will remain unchanged.

Makes (a bit of) sense? Maybe there's some effect I haven't thought of though.

Meg

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #4 on: December 06, 2010, 07:56:50 PM »
Thanks Gromit that makes some sense..... So if you put your hands close to this it would give you more heat rather than it all slipping up to the roof. 
N.Ireland

EyesWideOpen

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #5 on: December 06, 2010, 08:04:27 PM »
Doesn't the tera cotta act as a collector, and then radiate the heat out into the room instead of the energy of the candle alone being expended on trying to heat the room on it's own?

We're going to try to build one this week to use in our small bathroom-I am really hoping it works because that room is COLD-we don't heat the room, and bathing in there is true torture. If this little heater can bump the temp up in that room even a couple of degrees, I think I'd be more inclined to use cooler water which would save on running the electric on-demand water heater.

dermot

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #6 on: December 06, 2010, 08:05:10 PM »
The guy who makes it comments (on his admittedly 'biased' review):

http://www.sustainlane.com/reviews/kandle-heeter/JX24LRKFDAF9H7MDDUFHTSLUY78J

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I invented this thing 3 winters ago and have been using a Kandle Heeter tm Candle Holder as an additional heat source about 9 months out of each year. The first year was with dollar store jar candles -- and that went pretty well, except I did not care much for the candle aroma. A customer introduced me to "candle cartridges" made for the restaurant industry that are 99% pure liquid paraffin and burn with no soot and no odor. These are excellent in the candle heater. But this last year we developed an "electric candle" based on a 60 watt quartz halogen lamp. This is the best! Plug it in, turn it on, walk away. The halogen lamp gets the unit hotter than a candle, and since there is no flame, the fire danger is greatly reduced. This product is not going to heat your house -- it is low grade heat source, but if you burn candles it is pretty much a no-brainer. The electric option allows you to put one in a bedroom and have a source of heat and light at night. And if the lights should go out, you can always put a jar candle under it. If I lived in the Mid-West I would surely want one around.
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pamela

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #7 on: December 06, 2010, 08:07:35 PM »
i'm going to try making one of these and hopefully will be able to test it out in here.
Only think I can figure, is like what Gromit said, it captures the heat, allows it to build up in the clay pots and then radiates it.
it makes sense actually.
used to be you could get these things to put on your wood burning heater stove pipe that sort of did the same thing.
captured the heat, held it, and allowed it to radiate out into the room rather than go up the chimney.
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Abha

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #8 on: December 06, 2010, 08:12:27 PM »
I'm a potter, and trust me--it is the CERAMIC pots that take the heat from the candle and then act as the radiator. I once saw a broadcast wherein a guy had an incandescent light bulb and he attached a metal hood on it that looked like a the metal fins off a car radiator. It radiated the heat from the bulb--which is quite considerable off the 100 watt bulb he used.  It made the bulb a heater.

And....like they said the candle with the pots on top does something similar. "The outer surface of the radiator itself becomes a Dry Heat Radiating Body with surface temperatures of 160-180 degrees Fahrenheit which covers an area of over 88 Square Inches (double that for cms)." Also, the metal guts going up the center probably helps in this regard as well.

I've read reports that incandescent bulbs are "inefficient" because most of their energy goes off the bulb as heat and not light which is why fluorescents and LED lighting are supposed to work better and incandescents are being phased out.

My SO is from Chicago, and he said that many people there carry a candle in their car just in case they get stranded to help them to keep from freezing to death. He said it is a lifesaver even without the radiator part.

EWO and residualheat are going to make some of these to test out in their bathrooms. We will find out if they work and how well...and there are two ways to go--the candle or the light bulb.

Pam...in the past people used to build brick around their wood stove or wood stove pipes and that would make the heat radiate better. I think we might do this whenever we get to building our cabin. You can get brick free off of Craigslist.

Location: PNW--Seattle

Abha

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #9 on: December 06, 2010, 08:18:20 PM »
i'm going to try making one of these and hopefully will be able to test it out in here.

I figure that a quick way to make a bottom for it is to snag a #10 can from a restaurant and have at it with tin snips and maybe use a few L shaped angle irons? Anyway...I figure that could be another way to go.

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dermot

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #10 on: December 06, 2010, 08:20:39 PM »
Critical review here:

http://tinyhouseblog.com/heaters/kandle-heeter-candle-holder/

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I bought one of these and, sadly, I’d have to say don’t waste your money. As Tom said above, these little “heaters” put out no more heat than a plain old candle that costs a fraction of what this heater does. Also, the creator is very specific about what type candle can be used – it must be a votive in a glass. I found the unit melts the candle each time the heater heats up and the candles really don’t last as the creator suggests. Also, the heater seems a little top-heavy and has a tendency to tip over easily. It’s a great idea and a wonderful gimmick and I really wanted it to be cool, but I’m sad to say, it really doesn’t work.

http://www.greenoptimistic.com/2008/11/06/candle-room-heater/comment-page-1/#comments

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Clearly ideal for folks with no understanding of physics or thermodynamics whatsoever…

FWIW, ALL the heat from the candle ends up in the room with or without the decorative ceramic junk over the top of it. All this gadget does is trap some of that heat closer to the candle where you can notice the ceramic getting hot. It can not and does not increase the efficiency of heat production, heat transfer to the room, or the final temperature of the room. That is, it does nothing at all of interest or value. It does add a certain flowerpot and junk decorative aspect, if you like that sort of thing… and it will tell all your brighter friends that you are clueless about physics and heat.

And a counterpoint:

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I get that comment pretty often from those who have never been around fire heating systems. They become so focused on the “physics” that they lose sight of the practical. A candle creates an invisible chimney — put your hand above a candle flame — that very hot air is rising straight to the ceiling, and then out of the room. Oh sure, it is still in the room, but who lives on the ceiling?

What the radiator assembly does is short stop the heat rise and concentrate the thermal energy into a solid piece of steel, this becomes an active heat sink that is constantly radiating into the surrounding ceramics. I know Mr. Know-It-All dosen’t get it, but this thing really does work to keep real usable space heat at human level. Well over a 1,000 are out there, and orders still come in.

And counter-counterpoint (don't you love the hivemind?) This guy seems to know what he's talking about:

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Juawtawn: You are confusing radiant heat and convection. When air moves past a hot surface and becomes hot this is convection heating, not radiant heat. Radiant heat has nothing to do with air currents and can function in a vacuum.

Admin and the rest: Take some thermo dynamics classes.

Let me clear this up for you. There are three types of heat transfer. The candle produces all three.

1. Direct contact or atomic excitation: Here the fast moving atoms in one material (which is all that heat is) cause the atoms in another material it touches to move quicker. Touch a pan or a light bulb or your driveway on a sunny day and you’ll experience direct heat transfer.

2. Convection: Air moves by something that is hot and makes contact. Heat is transfered to the air by direct contact. The air than moves and contacts another object and transfers it heat to that new object through direct transfer.

3. Radiant heat: This can also be called inferred heat. Basically heat is transfered as a light wave. The excited atom drops an energy level and releases a photon in the inferred wavelength. When this photon hits something(a surface or even air)it transfers its energy into kinetic energy of the atom (or heat). This is how the sun heats the earth.

Now lets apply this understanding to this concept.

Anyone with any understanding of physics knows that you cannot add energy with this device. So the idea that you can raise the temperature of the room further with this device than with just a candle is clearly not possible, and a false claim.

A separate claim that can be made is that it is changing the heat transfer mechanism. Candles or any open flam for that matter transfer heat in all three ways.

I have seen some people here make comments about the hot air rising from a candle(convection transfer) so all the heat is at ceiling level and basically useless. This is true with the clay pot set-up too. It may not be as noticeable since the heat energy is dissipated over a larger surface resulting in a wider column of air with a lower temperature. A column of air with 4 times the surface area of another column but with 1/4 the temperature of the column is sending the same about of heat energy to the ceiling. In the end you are transferring the same about of heat to the ceiling just over a larger surface area. The end result is that heat rises no matter what. The same amount of heat travels to the ceiling.

Claims that it increases radiant heat are completely unjustified as well. The truth of the matter is it actually produces no radiant heat. The true test of radiant heat is can the heat be transfered without a medium (some type of matter). If there was a vacuum between me and the candle I could only detect the radiant heat. If I put this pot contraption behind a vacuum I would detect no radiant heat. The reason for this is because the temperature is to low. The quoted surface temperature of 140F-180F is no where close to the temperature needed to produce radiant heat in a clay material. What you might think is radiant heat is really just convection heating of the air around the pot.

This being said, even if this device was able to convert 100% of the heat energy into radiant heat (which clearly is not the case)a candle does not produce much heat. Also the notion that using a candle to heat your home is some how clean is ridiculous. A candle is one of the dirtiest burning fuel sources there are. Want proof, hold something over it and see how fast the suit accumulates. It may not produce as much pollution as a coal plant but it also produces a lot less energy. You would pollute less by creating that same amount of heat with your regular home heating system.

Conclusion: If you want to feel warmer turn up your thermostat, thats what it’s their for. If you want to burn a candle do it for its beauty or scent not its heat production capability.

And the inventor addresses "Deedle" (author of the above):

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The Kandle Heeter tm Candle Holder “works” — it does what it was/is intended to do, it harvests the normally wasted energy of a burning candle and makes it available at human level. Put “kandle heeter” in google and read the reviews, there are several glowing reports of folks who were/are amazed at the experience. Watch the videos.

The key to it all is the solid steel inner core, something not at all well addressed in the above comments. Steel has the ability to approach the temperature of its heat source. A candle flame burns at 550-600 degrees Fahrenheit — so the steel inner core will heat up to 500+ degrees. That Is HOT! So now instead of just a small one inch candle flame at 500+ degrees with no thermal mass we have almost 3 ounces of solid steel (think thermal mass) at over 500 deg! That creates a very nice thermal “heat sink” that is constantly giving up its heat into the surrounding ceramics, and is constantly being “replenished” by the burning flame.

And on, and on, and on.

BTW, I've just been reading a biography of Jack Parsons, who was one of the founders of American rocketry. He's a far more important figure than Robert Goddard, not that you'd know it from the history books. Anyway, Parsons was deeply into magick and the occult, seeing no conflict between that and his research at Caltech and JPL.

Clearly, they stopped making Polymaths a few decades ago.

One of the characters in the book was a professor at Caltech who believed that rocketry in a vacuum was impossible, because "There was nothing to push against".

This guy (forget his name) was the head of the Physics department, circa 1935.

Experts. You've got to love them.

« Last Edit: December 06, 2010, 08:22:24 PM by dermot »
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dermot

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #11 on: December 06, 2010, 08:27:32 PM »
Here's a great point from another commenter about the device, whether it improves heating or not, is great as a soot collector, and safety device:

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...in a powerout, particularly one that is prolonged like we had some years ago after an icestorm, it’s extremely usefull to burn candles. I kept my bathroom at a decent temperature with candles, three of them kept the small area quite nice, and a platefull of candles in my front porch kept the plants from freezing. The ceilings were black after that, but at least we didn’t have to evacuate the house and didn’t lose any plants. Though I did almost lose the whole house when the cat decided to walk over the plate with the teacandles, he shot out of the porch like a bat out of hell, smelling of burned fur, the candles were off and there was wax a bit all over the scene but luckily nothing caught fire.
...I think I’ll use them for burning candles as this seems much safer than an open candle with two curious cats roaming the house. Also I bet my ceilings are going to be less sooty if the candles burn under the pots, I can clean the soot off the pots lot easier than off the ceiling.
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residualheat

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #12 on: December 06, 2010, 08:30:43 PM »
Here's a great point from another commenter about the device, whether it improves heating or not, is great as a soot collector, and safety device:

Quote
...in a powerout, particularly one that is prolonged like we had some years ago after an icestorm, it’s extremely usefull to burn candles. I kept my bathroom at a decent temperature with candles, three of them kept the small area quite nice, and a platefull of candles in my front porch kept the plants from freezing. The ceilings were black after that, but at least we didn’t have to evacuate the house and didn’t lose any plants. Though I did almost lose the whole house when the cat decided to walk over the plate with the teacandles, he shot out of the porch like a bat out of hell, smelling of burned fur, the candles were off and there was wax a bit all over the scene but luckily nothing caught fire.
...I think I’ll use them for burning candles as this seems much safer than an open candle with two curious cats roaming the house. Also I bet my ceilings are going to be less sooty if the candles burn under the pots, I can clean the soot off the pots lot easier than off the ceiling.


Must have been a pretty stupid cat to get that close to the flames...


We shall try this idea anyway and report. Even a teeny bit of extra heat in that bathroom would be a bonus.

EyesWideOpen

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #13 on: December 06, 2010, 08:31:52 PM »
You have so got that right, Residual Heat, you really have! Even a couple of degrees would make a nice difference.

Jennifer

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Re: Keep Warm This Winter Just by Burning One Candle!
« Reply #14 on: December 07, 2010, 01:41:31 AM »
This reminds me of the "emergency car heater" I keep in my car in winter: basically a metal coffee can, label removed, with some cheap metal-cup tealights stored in it. Put a couple tealights in the bottom of the can, and the heat radiates throughout all the metal.