DIY Air Heater! Tee-Pipe Heater Improved! (3X Hotter!!) Orig. 170F/77C - Now 500F/260C! Hot Furnace!
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- Опубликовано: 18 сен 2024
- DIY Air Heater! Hot Air Furnace! (upgrade!). this video shows how i made just one small modification to my recently posted {4" Tee-Pipe Air Heater video} and now i'm getting near 500F/260C! output air temps (up from 170F/77C output temps). The Fan: 120mm low speed fan used (always use a low speed fan with these units). The Fuel: the unit can burn either isopropyl alcohol (70% or 91%) or ventless fireplace fuel (ethanol or bio ethanol). i was burning bio-ethanol when filming this video. can be run "off" grid (with DC fan). note that the pipe itself never gets that hot because the heated air is blown out so fast (also because the fan is constantly cooling it). note: bio-ethanol is an extremely clean burning fuel. it burns "particulate free" meaning there's no smoke, fumes or odors of any kind. it only releases water vapor and a very small amount of co2 (small meaning about the same amount that one human exhales). if interested here's the link to the original video • DIY Air Heater! Hot Ai... (includes lots of extra info). if you like the video please rate, comment, sub and share!
It's amazing what a difference a seemingly minor design variation can make!
Construction adhesive is highly flammable until it cures.
Apply in well vented and wait the amount of cure time stated on the label.
POP rivets and screws are instant.
I've started using this heater and the dry heat feels awesome ! !
Thanks for the follow up.- KJ
hi there. it's awesome that you made it! (yes, you apply it and wait 24 hours (usually) for it to dry. i use "liquid nails" construction adhesive a lot. it's ready in 24.
@@desertsun02 I made one of your - cans in a box - style heater with a 12v fan.
It was My only source of heat when I first bought My property - 2015. It still works great and I'm so glad you posted it and many other videos. -KJ
Just an idea. If you added one more coupler above the flame before the heat exchanger tube and close that tube off, so the fan is not blowing over the flame ( like a forced air gas furnace heat exchanger) might help. It’s an amazing build. I love your channel. Makes me think a lot more. Thanks for sharing with us all.
hi. i'm glad you like the channel and that it is inspiring you!
The fan blowing through the T fitting, could be creating a venturi. If so, that means that the leg with the alcohol stove is under vacuum. I wonder if drilling small holes around the bottom fitting, near the height of the top of the tuna can, would help the flame burn hotter as it would suck fresh air in and feed the flame even more, making it even hotter. 🤔 I may have to try this and see what the results are using different configurations. Thanks for the video and information!
I think you are totally right. I think the reason it works now is that the new extension piece has the crinkled wavy metal ends. That lets air in at the bottom of the flame and the extra height makes it act like a rocket stove. If you seal that joint, then it wouldn't work as well. But, you could seal it and drill holes like you said, Jay.
Totally right. More air is better not just for heat but also less soot buildup! 🪔
That's really awesome. A very minor change makes a major difference in the heat output. You can ask for better than that. I need to round up some stuff and lower my power bill. It wouldn't take long to run you outta the house like that. Great job.
great job of bringing this to light. maybe use a short bucket and add cement in the bottom with the tuna can and 4" coupler for a stable platform instead of all the bricks. I like your ideas and will be trying some of them
I made your first one with the stack boot.im using it now. Im nice and warm.
Thanks to you!!! I'm going to be Really ready next winter i will make this one.
Thank you again!
Dude you just keep knocking it out of the park with these videos!
thanks. i appreciate the feedback. probably 2 more heater vids this winter and then i might transition back to summer videos (air coolers etc.)
@@desertsun02 great! looking forward to them!
Great upgrade , impressive , thanks for sharing ,God bless !
Thanks, you too!
You should place the thermometer 6" in front of the heat source 4 an accurate exhaust temperature.
It is a good DIY project.
The reason why its hotter is because the source of heat is being exposed to less of the cooling element (wind) allowing the source to conduct more heat on combustion (where the fuel transforms into flame).
Nice job, cool lil project.
I tried to find inexpensive ethanol, but all I could find was very expensive. If I can get good enough heat using isopropyl and the extension, good enough. I have a 240 sf tiny house.
The reason the extension helps is complete combustion. You could screw self-tapping sheet metal screws to secure the pipes.
I'm in a 12x20 as well. 10ft walls so I have 2 lofts as well. I have a wood stove but this is a good back up.
I wonder how much more coupler extension would be needed to get a rocket stove affect?
Also, what I would lile to figure out is how to use the least amount of fuel, but get the same or close the amount of heat produced now.
The idea is to heat the air enough but also stretch out the longevity of the fuel.
This would be an awesome solution for camper or van dwellers.
Just curious, could this have a copper coil or ??? added (inside?) to provide warm/hot water ???
yeah, you could probably do that. that's a neat idea.
this is awesome! thank you! time to get a coupler now
Pretty cool maybe rivet the whole thing up with some right angle brackets
Twice as hot and half as noisy! Love it, thumbs up video my Friend ~John
This is the upside down version of the Dakota style fires. If you added a small hole on your can or where airflow can get under your flame, that would add another 100 degrees hotter minimum. I built 3 of these for my 60 ft shop. I do have a wood stove, but these work just as good and I don’t have to wait around for the wood stove to burn out. Lol
How long does the alcohol burn for I'm trying to estimate how much I would need to burn and how much I would need to pay if I use this pretty much all day everyday
Outstanding! This will by my shtf solution in an apartment:)
AWESOME BUILD as always! Could you use the toilet paper roll in the can so less chance of spilling the alcohol? Approx. How long would 32 oz. of 70 % alcohol burn? Thanks
I was wondering the same thing with the toilet paper in a paint can. You might have to make it a little bit taller.
Check out lard as fuel. I just watched a few. They burn for a really long time on lard. Good luck
great job and so simple but i think you need to drill some holes in the bottom part for oxygen inlet ...
I had tires your method and actually work!! Rarely does DYI work for me but this one does. Just in time for us forks in Nv for all our gas bill just went up (without warning). So, I will add this with my home heating system. Thanks for this GREAT idea👍👍❗❗
hi there and thank you. i'm glad it helped! 🙂🔥
Check out the ethanol gel cans...
They're basically a tuna can with a smaller opening on top with a lid. They burn 2 hours... then you could reuse the can/lid with alcohol or ethanol liquid.
I think you can buy 6 for about $20 last I checked.
That’s good in emergency situation but not as a true heat source, it would be very expensive.
@@mississippigardener987
Exactly... but ethanol doesn't smell offensive (like iso) and the gel cans burn for 2 hours as opposed to the liquid is gone in 20-30 minutes.
I think most of these ideas are for emergency or grid down situations though.
I am wondering if the oxygen supply were closer to the flame how would the performance be effected? Like small holes in the bottom of the metal cans and extension sleeve?
Thats awesome
thanks ✔🙂
Tatally brilliant! Thank you for sharing. Stay safe. ATB. Nigel
DUDE, THAT IS AWESOME!!! MANY THANKS FOR YOUR PERSEVERITY ON RESEARCH!!
hi and thanks! 🔥🙂
He should try 1 more coupler and see if that adds even more. Just trim off one end of the crimped section so you have a regular pipe end to slip into the first coupler.
you should test this with buddy burners and other kinds of stoves. Great Job impressed.
You just made my "Play of The Day" (I'm impress)😁😁👍👍❗❗
The parts I got at our HD looks a bit different. The Tee doesn't have the ribs on it and the connector for the bottom is a bit longer, hope it works, but an experiment right?. Is the Tuna can have a significance? Or just for saftey. Thank You for all your projects through the years, you are appreciated! 😎
home depots tee pipes are a bit different. i got the tee pipe from lowes. if the tee pipe you bought from home depot doesn't work - let us know (if you want). it would be helpful to know if it works. the tuna can is just for safety.
@@desertsun02 If you look on HD site you can see it is a Tee but not as nice as yours. I knew I should of went to Lowe's. I'll let you know how the longer connector works.
I am wondering...
Would adding some holes to the bottom of the coupler allow more fresh oxygen into the "plenum" and further increase the temperature of the burning alcohol? The yellow flame suggests incomplete combustion.
hi. it seems like it's actually burning just as strong as it does with no pipe over it. much of the air that is shot into pipe actually goes down to the flame and then back up again. it looks so yellow because it's in an enclosure. that same flame looks almost invisible when you add light to it. *my next video shows a great example of that. (it looks solid yellow in the shadows and almost invisible when i shine light on it. my original video with this 4" tee pipe has some footage of that too. (when the living room curtain is closed it's yellow and when the curtain is open the flame looks half-invisible.
Makes sense that the flame is a toroidal energy field and it needs a certain amount of space
...its the rocket stove effect i think... good job 😁
thank you!
Awesome! But how is it getting oxygen? Maybe by the Fan?.
hi yep, the fan. when i originally made the first tee pipe heater (with the 6" black stove pipe tee). i built it so it had airflow from the sides. the 4" model seems to get plenty of air from the fan
Wonder if I could use this as an indoor sauna heater for my apartment ... 🤔
Brilliant ! 👍
How long before more fuel needs to be added... Is there a way to automate the process? Thanks.
i'm getting 20 to 40 minute burn times (with ethanol fuel)
Awsome job. Love your videos.
Thanks so much!
I wonder how much heat with just candles, i might see if it works😊
Amazing!! Well done.. adding to my bug out kit (so to speak).. do you think crisco candles would be a good source? I know, depending on the size of the candle, they can last 72 days straight.. (for a medium candle)
Got any suggestions on how to burn less fuel but get enough heat to still do the job?
I want to get a longer burn time per oz of fuel for obvious reasons.
Since the purpose of the design is to heat the air going up the tube, then the fan blow it out into the room, I wonder if the flame could be reduced enough and add enough extension to the coupler area to still heat the air hot enough?
So would an alcohol stove can do the same but have a longer burn time?
You should test it by putting some rods in there. Drill some holes going from one side of the pipe to the other then stick the rods in there to heat up by the 🔥flame I better gets a lot hotter.. I'm doing that on rockfield right now
Hand sanitizer gel in the tuna can as fuel will prevent spillage.
Great video!
Yer man thats the way. Im defo trying this.TThanks.
I wonder if a small wood burning stove could also be adapted like this with the tee pipe over the top?
Maybe in a ventilated enviroment presumably.
Fantastic mate.
Many thanks!
@@desertsun02 if you don't mind, I'm definitely going to steal this idea for my greenhouse, but make it out of Poured perlite concrete to contain all the heat into the burn chamber and make it a block with the t shape inside so it's stable on its own
Is this better than the bricks did, in your opinion? Also, what do you think about putting a couple copper coils on ethanol in there if the grid did go down so that you could actually sleep 8 straight without refilling over and over? Just a question, I've been watching from afar and like the stuff you've done.
hi. it's hard to compare to my brick heaters. this one really cranks out the heat though. i'm not sure what you mean regarding the coils
See you are using a cut tomato can . I assume it was a whisker stove one time. Have you tried the Vienna can stove ? Holds an extra ounce and you don't have to cut.
Can just use a couple stainless rivots on the awesome heater. 👍
anything durable - to make sure it doesn't fall apart
@@desertsun02 True
wondet how it would work on a rocket stove
slip a couple L brackets under the clamp to sturdy it... I wonder what height you start to see diminishing temps like a velocity stack on a carbureted engine some top racers would get it down to fractions of a millimeter and compensate for temp and humidity....
I wonder why people never used this device in fireplaces.
Look at you! So smart. ThankYou ❤ I shared with Telegram channels ☺
Thanks for sharing!!
Would this build be sufficient to heat a small garage during winters?
If you can hook the fan up to solar power with a battery that would be a great efficient way to heat a house
i agree! you can hook some of these dc fans straight to a 12v solar panel (no battery needed) or just straight to a 12v battery. 12v computer case fans work great with this unit and can be run straight to a panel or a battery.
@@desertsun02 nice
I WONDER IF USING A 3 WICK CRISCO CANDLE WOULD WORK....IT WOULD LAST 72 HOURS...SO THEY CLAIM... JUST IDEA...GREAT VIDEO THANKS FOR SHARING!!!
hi. unfortunately the wicks on the "wick based" burners will just blow out.
@@desertsun02 Hey there! We've chatted before.. I'm a van dweller.. I think I might have a solution to the wicks burning out issue. What if you had about 8, 1- inch holes (for air flow) near the base.. and then you block off the back of the T with some sort of cap.. THEN.. you place the fan at the front end, drawing the heat OUT of the T, and into the room? I'm gonna try that method, myself. I'll let ya know what I find. Keep up the GREAT work!
Awesome
I would bet you that using a mantle on top of the stove would make a lot more heat. Try it fella, you will be surprised.
What about the exhaust gases?
the only exhaust gases are water vapor and a small amount of co2 (about the same as a human exhales). burning ethanol doesn't release any harmful fumes (none at all). no smoke, no soot, no ash, no fumes, no odors, nada. it's not a cheap fuel but is very "clean and green".
Just wondering, does the forced air from the fan increase the burn time ? Does it add extra fuel to combine with the ethanol if you will ,oxygen being burnt up and acting as a fuel?
How do you get it to burn all night?
Please suggest more fuel types. Alcohol ain't available in Pakistan.
Is there a wick or does it work by magic?
What did U do with the cans & alcohol n stuff?😒
At what distance do you still feel the heat?.
hi. a noticeable hot breeze reaches about 6 feet (maybe more).
@@desertsun02.... WOW
What's the rate of fuel consumption
I think it consumed a lot, at least 2 gallons a day.
Those look like Landscape bricks. I was just trying to better understand why tape is better than clamps. I get that it seals the air at the tee junction. Just seems that the clamps would be a more durable connector than specialized tape. Apparently Amazon and Wal-Mart sell the bio ethanol. I did not find any at Lowes. But I forgot to call it Bio-Ethanol or Regal.
hi. the worm gear clamps won't hold it because the coupler is designed for flexible tubing. when i tried to use them it just pushed the coupler out of the tee pipe and it wouldn't hold. i would have just used them if i could have. 3M sells a high temp tape that is good up to 600F. some people have suggested screws or rivets. that may work
@@desertsun02 Thanks. That makes sense.
What type of temperature does that have if you use a Crisco candle would it be the same or is the Crisco candle less
Hello. can you suggest a specific bio ethanol ? Great video Very helpful and very much needed thank you.
hi and you're welcome. i've only tried the one brand (so far) so i can't suggest any brand in particular.
@@desertsun02 ...OK thanks for responding .
I wouldn’t use adhesive….it will burn or melt. Use pop rivets or self tapping screws
hi and thanks for the ideas! 👍🙂
A couple of tec screws will keep the coupling together
Any change you measured an increase in room temperature during burn time?
hi there. absolutely! originally i had fired up that heater that morning just to warm up the living room. i figured i would run it for an hour or two (until the sun started streaming in). i decided to try it with the coupler to see how (or if) it would change the flame. it seemed hotter so i put the thermometer on it and when i saw it in the 400's i grabbed the camera. i couldn't tell you how hot the room got but i was "burning up" sitting in front of the unit. (burning up in a good way)
@@desertsun02 Wow! That's amazing. Thanks for the feedback brother. I've been watching your videos for a couple of years now and am never disappointed. Nice job.
I wonder if it could compete with a kerosene heater?
They will heat for 12 hours on a gallon of kerosene. And are about 12000btu
I'm trying to understand costs here. Maybe I don't know where to buy cheap ethanol. I see 32oz for $20 ($80/gal) for 200 proof Food Grade.... but at 2oz burn rate per 30-40 min.. this gets expensive pretty quick.
[Edit] I just saw 12pk of 1L bottles (33oz) of BioEthanol on ebay for around $48-$60 f/s. Now that's a lot better. about $4-$5 a bottle so let's say 29c/2oz ... so about $0.60/hour
I asked ChatGPT to help me calc. the BTU/hour assuming 2m/s air speed, 4inch vent, 500F out, 68F in and 50% humidity. Comes out to almost 16000 BTU/hr !
Let's assume the circular vent has a diameter of 4 inches, which is 0.1016 meters.
The area of the vent is:
A = pi * (d/2)^2 = 0.00812 square meters
The volumetric flow rate of air: (area of vent in sq.m * air speed in m/sec):
Q = A * v = 0.00812 * 2 = 0.01624 cubic meters per second
To determine the mass flow rate of air, we need to know the density of air at the inlet temperature of 68F (20C). Standard density (rho) of air is approximately 1.2 kg/cubic meter at this temperature.
So, the mass flow rate of air: (volumetric flow * density)
m = Q * rho = 0.01624 * 1.2 = 0.01949 kg/s
Temperature difference: The heater takes in air at 68F (20C) and outputs air at 500F (260C), which is a temperature difference of 440F (240C).
Specific heat of air: The specific heat of air at constant pressure is approximately 1 kJ/(kg*K).
The energy required to heat 1 kg of air by 1 degree Celsius is 1 kJ.
Therefore, the energy required to heat 0.01949 kg/s of air by 240C is:
240 * 0.01949 * 1 = 4.67816 kJ/s
To convert this to BTU/sec, we can use the conversion factor of 1 BTU = 1.055 kJ:
4.67816 / 1.055 = 4.43 BTU/sec
Convert to BTU/hr (how heaters are rated):
4.43 * 3600 = 15948 BTU/hr
A simpler calculation for "America" :)
BTU/hour = CFM (cu. ft/min flow) x deltaT (temp out - temp in ..in deg. F) x 1.08 (constant)
CFM could be measured with a handheld device that measures air speed through a vent
Also to add, in USA, you pay natural gas utilities per "therm". 1 Therm = 100000 BTU's.... Current prices avg 1.80 with delivery, per therm.
So still cheaper to use the natural gas.
But maybe if you just want to heat just a bedroom this may save money, instead of heating the whole house via the central system.
But I realized now that my assumption of 2m/sec air speed must be very wrong. It must be way less... because it doesn't "add up".
The normal BTU's you can get by burning Ethanol is about 20000/liter (33oz)... so only 1250 BTU (about) for 2oz ... (which is said to burn in 30 min here)..
So 2500 BTU / hour should be the maximum you can get from burning ethanol at the rate of 4oz/hour.... nowhere near that 16000 calculation that assumed 2m/sec air speed coming out at 500 deg F
I figured it out. See when you hold that thermometer so close to the fire, that metal in the thermometer absorbs so much of the infrared (heat). That temp you're seeing of 500 deg F, is FAr from being the **AIR** temperature that comes out of that vent. In fact if you take that thermometer and hold it on a candle flame it will probably reach that.
Look, to heat AIR "quickly" is very expensive because it doesn't absorb radiant heat (infrared) easily. If you want to know how fast a given room will heat the air to a constant temperature, it's all about the the BTU output and you just can't cheat nature. But you *can* for example store heat into something that absorbs it quicker (say..clay, stone..mass of concrete or sand) and that will absorb it quick, and be able to release it to the air slower, where the air can absorb it slowly.
You can feel like it's hot when you stand in direct view of an infrared emitter (something very hot..like fire..sun..oven ). But shade that direct view and that feeling is gone (because it wasn't the air temperature you were feeling...it was the infrared radiation). Same goes for your thermometer. It's not measuring the Air temperature. It measures the infrared radiation absorbed by the metal in the thermometer.
You can do the math and figure out how long a room space air will take to heat from a given temp to another temp, using ethanol at a specific burn rate.
Best.
Your channel is v cool and i just discovered it :)
I came back here because I want to elaborate on the difference between infrared radiation and ambient temperature.
You see both are "sensed" by a measuring device like a thermometer or..your body skin. The difference is infrared radiation can pass through some transparent things but cannot pass through most materials. If you're in direct view of something hot, you will feel that infrared radiation and your body perceives it as "heat" - same as it would ambient temperature. The difference is that "direct view".
If you have a "mass" of some material that has absorbed heat and that mass is located in direct view, it will release that infrared radiation slowly and you will "feel the heat" for longer. This is why in the older days and even now in rural areas they have BIG MASSES of materials (think clay, heavy cast iron , terracotta stoves..etc) they would heat up. Those materials absorb that infrared much faster than air. Then when the fire is gone, they continue to release that infrared into the surrounding space. If you're in direct view you feel heat. You can also feel heat if the ambient air (which took much longer to absorb the heat) has increased in temperature. But that's not needed.
They used to have "naked skiing day" in the Alps and I think even in Vermont. It would be cold outside, but the sun and no wind would ensure all the infrared emitted by the sun would make you feel hot enough, to even take your cloths off and go naked skiing.
These things on your channel I see many of them use this principle of infrared radiation absorption into some heavy mass, then slow release into the air,. This is the key. Otherwise you need a LOT of energy to heat air directly because it just doesn't want to absorb heat. So if you happen to want to measure an "ambient temperature" always make sure you shield your thermometer from a heat SOURCE. Because otherwise you're measuring the infrared absorption of the metal in the thermometer, rather than ambient temperature.
GL - I like your channel - subbed.
Are you using any wicking material in the fuel container?
hi. i didn't use a wick. it's just the can 🔥
What is the fuel consumption per hour ?
yes it's hotter, but you are consuming the ethanol more quickly.
hi. the burn time is the same on both units. it's not burning any faster. i get around 25 to 40 minutes on either unit (using the same amount of fuel). i timed 2 oz. today. got 38 min. burn time.
@@desertsun02 Curious, my experience in this case is with Trangia stoves; if you separate the pot from the stove you get faster cooking times but consume more alcohol; I thought the same thing would happen in your system.
What about just putting it in one of your clay pots?
Can we get a temp reading of the air coming out ? Because you are attached to the metal. 500 seems extremely high
hi. the 500F is the actual air temp. the metal tube doesn't actually get very hot. maybe 150F (that's because the fan is blowing on it non-stop - and because the hot air is blown out of the tube immediately). the 500F is the real air temp. (100%). it topped at 500F but it was steady at 485F for a long time.
Would it burn longer with a rolled up piece of cloth inside the can?
i wouldn't put any cloth in the can. since you are using a fan you don't want any pieces of cloth flying out of the unit.
how long does it burn if you fill it to the top?
have you tried alternative fuel blends, like mixing diesel with a small amount of acetone?
hi. i haven't tried mixing fuels. could possibly be dangerous to do that?
Lol 🤣 yeah you dont wanna do that indoors.
@@desertsun02 diesel will not even light with a match, lol. I've seen Indonesians using a hand pumped garden sprayer to spray a mist into a burner and it produces a ton of heat without smoke once it get hot. Was thinking something like that with a tiny hot burner for heating. Could use the fireplace fuel to preheat the burner.
BUILD A FLAT ROOF AND GET A HEAT ACTIVATED STOVE FAN
good idea!
Your Def on to something here? Put a huge terracotta pot over it.
What about denatured alcohol?
hi. denatured alcohol can sometimes stink "to high heaven" so i usually avoid it.
But you need electricity for the fan!
yes, but lots of dc (off-grid) options ✔
Parrafin Oil is much better than either of those fuels.
Not better, different properties.
Where did u get the fan from?
hi. i use 2 different fans. the 4" round one is from walmart and the 120mm square one is from amazon (axial fan series model LS1238)
Thanks big time
What fuel u burning
hi. i mainly burn an ethanol fuel in this unit. the stuff i use is a type of "indoor ventless fireplace" fuel. you can get it on amazon 👍.
what about the risk of Cancer ?
hi. no risk of cancer with this. i'm using very clean burning fuel.
The devil is always in the details
AWESOME!
Penny stove would be safer