Ceramic Flower Pot Heater

There are a few videos going around the web on heating a room using clay flower pots and tea lights. The British video has the presenter saying it costs him 8 pence a day to heat his room. I did the math for you and that comes to .13 cents usd. With claims like that this video is going pretty viral in the survival community. If it turns out to be legit this is a great backup and off grid heat source. I knew I had to put on mythbuster had and give it a go.¬† I went to the store and got supplies and have been testing for over a week. Today I’ll share the result with you on whether it’s worth it.


Ceramic Pot Heater

Ceramic Pot Heater




The Concept

I concept here is that the air in the smaller flower pot will be heated and through convection heat the room coming out the bottom and the top hole. The hole in the bottom pot is covered to force it out the top one. The clay pots are also supposed to work as a thermal mass and radiate heat out. In another video the guy used a bolt to connect the two pots together. It makes moving them easier and the metal is supposed to help radiate heat. I tested four variations on the design, no holes covered, bottom hole covered, both covered and finally with the bolt.


Holes Covered

So I ran it first with no holes covered. This is only useful as a hand warmer. All the heat blows out the top in a jet of heat. The pots retain almost not heat and don’t radiate it out. Just using the tea lights alone would be better. Next was flowing the British guys advice and covering the smaller hole. This time less heat came from the top hole and much more heat was put into the pots and it became hard to touch it after a few hours. However it had no real effect on the room temperature. I could not feel any heat holding my hands one inch from the pots. Next I covered both holes to try to dump more heat into the pots. I couldn’t really tell any difference. At this point I called it Myth Busted on this design.

With Bolt

After being nagged by a coworker on needing to test the bolt design. I was ready to write the entire thing off but finally decided to put everything into this last version. I got a bolt, nuts and washers and spent an entire day testing it. I had tea lights burning from the time I woke up till the time I went to bed. The bolt does absorb tons of heat and radiates it out. The clay pots became very hot and touching it was limited to less than a second. Holding my hand close to it I felt heat coming off it. The overall room temp though didn’t really change and was still pretty cold. I mean uncomfortable cold, and I like it cold in my apartment. Maybe in a smaller sized room that was very well insulated this would work. I am however stamping it myth busted. Do not bother with this it does not work. DO NOT RELY ON IT IN AN EMERGENCY! If you like to tinker and toy around maybe build one. I’m leaning more towards building a small rocket mass heater in my apartment and venting it out my window. It would be even cheaper and it proven technology.

 Have you seen this? Are you thinking about building one? What do you use for backup heat? Let me know in the comments!


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11 comments to Ceramic Flower Pot Heater

  • Coyote

    I agree this DIY Heater would only be good as a foot warmer in a large open room.

    Saying that, let me say this, I’am thinking about putting this in a 1/2 bathroom in our house in case of a power outage this winter, for a supplemental heating source.

  • Aikidoman82

    Thanks for the review. It saved me some time and money.

  • Lew

    ah man wished it worked. Looks like Rocket mass heater is the way to go. I wanna make one.

  • I’d be worried about toxic gases. It’s cold, so you’re probably going to seal up the room. Then you’re burning the cheapest tealight candle you can find, made out of who-knows-what. Cheap waxes give off small amounts of pollutants, which could cause a real problem in a small, non-ventilated space.

    I like your mini rocket mass heater idea, vented out the window. It would also help to draw fresh air into the room, keeping you much healthier.

  • V Weinhaus

    Just wait it out until spring, if you can, and catch the kerosene heaters on clearance at your local stores. I picked one up – a NICE one, normally $129 – for a mere $38 this last spring.

  • Deez

    You are all missing the real way this works. This works on Far-Infrared technology. Good luck finding info on it also. Far-infrared heating radiates the heat to warm things, including people. So you will have a room in which you and the things in there are warm, but if you test it with a thermometer to test the air temp it will seem a failure. It does work but not in the way most people are told through their science teachings.

  • SPrice

    I disagree with your testing. I put my own version of this in my living room last winter, using only one flower pot, 4 tea lights, and a tin pie pan with holes punched in the side to allow airflow (without the holes, the candles go out). The flower pot sits just inside the lip of the pie pan, so I wasn’t worried about balancing the flower pot across the top of a loaf pan. I set it on a plant stand in an area that a draft from the front door often cooled the room to a point where it’s uncomfortable in the winter. Not only did it make the room warmer and more comfortable, but it reduced my heating bill by about $50 per month. It definitely worked for me. BTW, I also placed scented wax in the center of the tea lights, and as it melted it made a nice scent in the room. I told a friend about it; he made one for his living room and had similar results.
    Maybe you’re looking at this as replacing other heat sources, however, I used it as an additional heat source. It maintained a constant 72 degrees in the room without having the furnace kick in. I used 4 candles, twice each day, and didn’t use it during the night when sleeping in a cooler room is comfortable. You definitely know it’s working when the candles burn out without you noticing it, and before long you’ll feel a drop in the room temperature.

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