Ancient Korean Ondal Smoke Heated Floor
HTML-код
- Опубликовано: 27 сен 2024
- Korean smoke heated Ondal floor explained in detail, ancient and current uses as well as how to use one for a greenhouse.
Simple Tek Facebook - / simpletekvideos
SUBSCRIBE to Simple Tek - www.youtube.co...
I spent all of 1969 in a mountainous area of Korea in a very rural area and can tell you this heating system works very well.
thank you for the info!!!!!
@@SimpleTek Back then if a Korean was found chopping down a tree he was jailed, they could take anything that broke off or fell down but no taking down a tree, In ities the sild charcoal that was teken from harvested trees in a managed way. There was small mountain village just below the microwave site I was stationed at and I can tell you they were hard working people and they kept us informed if any strangers were in the area.
These mountains weren't that high and most of the tree cover was stripped by the Japanese in WWII or before. The only mature trees I saw over there were at Buddhist religious shrines and sites, the Japanese did not cut those down..
What about bambo
@@dell177When I was there in 1977/8 it was still that way. No cutting of trees, they bought charcoal the size and shape of the old style coffee cans . Had to be careful about monoxide poisoning.
@@n2skcmo I was there 1988-1990 and had to change the those charcoal bricks twice a day but, we had a heated water based system. The Army would not let service members live in a home with the heated exhaust air from the fire systems because of the carbon monoxide issue.
Storing excess heat or even cold in your floor or wall has always seemed like such a good idea to me. It blows my mind that it's not standard practice.
Right?!
Satan is the god of this world
@@anthonyman8008 please keep religious comments off this channel. I have asked you nicely and respectfully. Please treat me with the same respect I’ve shown you.
@@SimpleTek are you Satan?
@@anthonyman8008 this is your second and last warning.
My grand father had 3 greenhouses heated this way here in Finland. It was a common way back in the 1950s. Greenhouses where 30m long built in a slope to get the heat to rise and circulate. Smoke channels where of red tiles not to crack by the heat. Carbon monoxide was a real problem. Main source of heat was though raised compost beds and this method was used only as additional heating method during early spring and the coldest nights. In 1960s steel pipes became affordable so hot water central heating replaced this heating method.
Awesome
Who ever came up with the design thousands of years ago, good job!
Yes!
Thank you for your interest. First of all, the name of this heating system is "Ondol", not "Ondal". It means a warm stone. In modern Korea, more advanced hot water underfloor heating is used. If you apply this with Ondol, you can use the warmth more efficiently. The type of boiler can be used depending on the conditions, such as wood boiler, oil boiler, gas boiler, electric boiler, solar heat and sun light, etc.
Ok
One of the primitive technology channels did a video where they used clay tiles + clay to cover a trench that crossed the floor with the fire and chimney on opposite sides of the hut. Pretty cool for long term winter camping.
Nice
Thats how roman heated floors worked, tiles intersect on pillars with the whole floor hollow underneath
Was going to say it reminds me of the hypocaust system.
I did a tour of duty in the ROK and have stayed in Ondol heated homes. This was in the '70s and the Air Force brass told us not to sleep over in an ondol heated house because if there was a crack in the floor, CO can intrude and asphyxiate you. I remember the women sweeping up pine needles that would be compressed and heated into cylindrical Ondal briquets, each about the size of a 14"x 6" cylinder perforated with longitudinal holes, just the right size to put in a terra cotta tube (the stove) that when ignited vented the smoke under the floor, warming it comfortably. It gets very very cold in the ROK, they didn't call it "Frozen Chosen" for nothing.
That’s awesome
식물재료를 태우는 온돌에서는 일산화탄소 중독사고가 없습니다. 이유는 초저녁에 1시간 정도 불을 때면 새벽까지 바닥이 따뜻하므로 잠든 후에 일산화탄소가 발생할 일이 없습니다. 말씀하신 구멍뚫린 숯은 연탄이고 채굴한 무연탄을 압축성형한 것입니다.
연탄은 잠자는 동안에도 계속 연소하므로 일산화탄소 중독사고가 많았었지요.
마른 솔잎은 형태의 변형없이 그대로 아궁이에서 태웁니다.
지금은 직접 화염이 방바닥 아래를 통과하는 방식의 온돌은 거의 사용하지 않습니다. (1% 이하) 주로 가스 보일러로 데워진 물배관이 방바닥을 순환하면서 열교환되는 방식의 온돌입니다.
Although I heat my greenhouse with waste heat from my house heater, in Winter, I grow onions, garlic, cabbage and loose-leaf lettuce, crop choice being more the determining factor than mechanical heating.
I live in North Texas and right now, we are having an ice storm, but all the plants inside my greenhouse are just sailing through it.
Thanks for sharing!
난 한국인 입니다. its Ondol . Decades ago Korean use it not only heating house but cook and boil water nowdays its tranformed modern style . Thanks
Very cool
Brilliant. I thought I had heard of all the Permaculture ideas for heating, from Kachelofen to Kang to Rocket Mass Heaters to Long Houses but this one is new to me and makes total sense.. Congratulations for finding it.
Glad it was helpful!
Ive thought of this for years, modeled after the Roman bath houses- but with no water. Thanks for sharing
Thanks for watching!
Simple tek is the most reliable kind
absolutely
We have been using a similar system in Spain since Roman times..... It's called "La Gloria" underfloor heating.. In the Castilian countryside you will find lot's of these kinds of Buildings.
That's awesome! Thank you
Are you reading my mind? I've been looking for Ondol information in English lately and it is difficult to find. Thank you so much!
You’re welcome!
It was on my mind too!!!
And Romanhousing used the same principles.
I wonder about one thing though: how would you keep the floor tubes / canals clean?!
@@Pilot333 let Roomba do the work.
@@Pilot333현재의 온돌은 직접가열이 아닌 가열된 물의 순환에 의한 간접가열 방식의 온돌인데 주기적으로 tube flushing하면 열교환 효율이 좋아집니다.
I was in the US army stationed in Korea in the 1980’s. I still remember the smell of ondal during the winter.
I remember there were occasional deaths from carbon monoxide, mainly because the entire floor had to be completely sealed from the fumes below the floor. Some of the older houses in the village were built right after the war so they were already leaky. The available materials were pretty basic back then.
Ondal in the 80’s was a compressed cylinder of charcoal about the size of a coffee can. It had several holes from top to bottom so they could be stacked and still burn from bottom to top with flow of gasses. Most of the stoves would take two of the charcoal cylinders. I think they would last about 5 or six hours.
Thank you for the info!!!
bricks are rarely used in traditonal Korean construction, unlike China.
most ondols are made with stones and clay and lime, before the modern era.
after 1900, cement concrete blocks, cinder blocks, bricks and portland cement is commonly used.
after the floor is rendered with clay, it was covered with special paper.
Thank you
ANOTHER "TRICK" TO INCREASE THE HEATING VALUE:
* Have some type of water containers "under" the home that the hot smoke will heat up while it's circulating under the home.
* Because water is the BEST substance to retain heat, the intensity of the fires could be reduced... which of course reduces time, energy and money invested in keeping the fires going!!!
FYI:
* My wife and I just retired and we're moving to NW Montana and we'll be implementing many of these techniques in our new home... along with a "Log Boiler" (load it once and it runs for a couple days) for our radiant heat in our home, greenhouse and shop!
Amen
Retired, Veteran
Thank you for the ideas!
@@SimpleTek Love your videos!!!! : )
@@BowenOrg thank you
what material u think to store the water in?
@@bighappy177 You might want to test "pex tubing" wrapped around a closed water container of some sort... maybe many small to medium sizes ones or one large one.
Copper tubing is to expensive unless you can get some for free at the "Junk yard!"
Of course, you could just do it the old fashioned way and put the pex plastic pipe under the dirt laying it as much as you can before it goes up the chimney. That will keep the ground fairly warm and that will help a lot!
Amen
Retired, Veteran
If you built a house with a second storey, you could use a rocket stove to drive a liquid radiant floor heater to carry that heat to the second floor.
Ok
I used to live in Korea in the mid 1970's. They used to have continuous running PSA's about carbon dioxide poisoning from people heating their homes in this manner. I'm not sure how it went wrong, but apparently, this was a common cause of death at that time.
Interesting
한국의 바닥 난방 변천사입니다.
천연식물재료(나무,풀,짚 등)를 아궁이에서 태워 방바닥 아래의 통로를 통과시키는 방식, 초저녁에 1시간 정도만 불을 피우면 새벽까지 따뜻함. 중독사고 없음. -> 1970년대 이후 도시화 되면서 연료가 원형의 압축 무연탄으로 바뀜. 이 연료는 점멸조절이 불가능해서 잠이든 늦은 밤에도 계속해서 연소되므로 방바닥에 균열 발생시 일산화탄소 가스중독 사망사고가 많았음. -> 1980년대에는 연탄보일러 등장, 연탄으로 물을 끓여서 방바닥을 온수 배관이 통과하는 방식으로 변경, 한편 보일러실에는 배출용 팬을 설치해서 사망사고가 급격히 줄었음. ->90년대 이후에는 온수 보일러의 연료가 천연가스로 변경되기 시작함.
즉, 연탄가스 중독 사망사고는 연탄사용 + 방바닥 아래에 연기통로가 있은 직접가열식 온돌 상황에서만 발생한다고 봐도 됩니다.
재미난 점은 한국은 인구밀도가 매우 높고 직접가열식 온돌을 사용하던 1970,1980년대 중반까지는 시골에서 가스중독 사고는 전혀 없었지만 엄청난 양의 벌목이 연료용으로 필요해서 산림이 빈약 했습니다. 연탄이 등장한 이후에는 산림이 점차 울창해진 반면 10~15년 정도 연탄가스 사망사고 빈발 했어요. 이후 연탄보일러 시대를 거쳐 가스보일러로 바뀌면서 산림도 울창해지고 사망사고도 없어졌어요.
I have seen a greenhouse (in Korea I think) with a rocket heater and a bench. I liked that idea, as the bench can be used as a heat mat for seedlings in early spring, and as a nice bench to sit on in summer. Or just to place pots on.
Cool
I love the design. It's both simple, yet sophisticated in the details of its execution.
What really scares me is the thought that in our civilization, millions could die from a blackout in winter, due to something utterly preventable and to give fate a cruel mockery: our ancestors wouldn't even know the thing we depend on with our lives...
Last week, we had the coldest week of the year and local power outages in Germany, Switzerland, and Austria!
My boss was one of those who got hit and he was lucky to be one of the few who still had a functional fireplace in his home.
Since I live in a rented flat, there's no real way for me to make a fire indoors. The best I could do is put a rocket stove on the balcony and heat a big cast iron pot filled with sand, take that one in, and maybe fill a water bottle for my bed...
Thank you for the insight
by design, in city, in flat, no fireplace... pacify.. must come to them for needs.
Hi frm TX
Romans had something similar in their bath houses where there was a gap, brick pillars, and about 30cm of concrete. Gap was for smoke to pass and heat the floors. In slavic countries we have pec wich is similar to rocket mass heater. It's used for cooking, baking and heating. It's traditionaly build out of brick, positioned in center of house and very heavy. Rest of the house is usually out of wood, so outside that would suck heat out, is from light thermaly isolating material while heating is from heavy heat absorbant material.
Interesting
In Spain, this system was previously built and it was called Gloria.
thank you for the info
IHello and thank you, it is very interesting. I have also seen this video, from Spain.
Cheers from Canada
In Spain this exists also and are called "Glorias"
Cool
Very time proven method and there are variants seen in many cultures. You don’t want smoke, as smoke = unburnt wood-gas = inefficiency. Smoke also has a tendency to condense on cooler surfaces. This forms creosote which not only acts as insulation, but being unburnt refined fuel, IS highly flammable. Creosote is what fuels chimney fires, and is the result of cool/smokey combustion. What you want is a fire that burns hot enough to fully break down all the combustible wood gas, so there is nothing left to condense. You control the size of this hot fire to control the overall amount of heat delivered. A rocket stove is a good selection for this as it can be sized, or run in 2s or 3s to deliver an appropriate amount of heat yet burn very clean. The problem with the basic Ondol is it requires constant attention to feed that fire. A biomass or pellet burner would also be a good choice as they can run automatically and maintain small but very clean combustion for long periods of time. I drew up a plan for a cabin that had the flame inside where it could be seen(Humans like and are comforted by seeing the flame), but the exhaust was drawn under the floor to heat the floor mass Ondol fashion with the burner on the opposite end of the building from the chimney.
Thank you for the insight
Mentioned modern underfloor radiant heating is invented by well-known architect, Frank loyd Wright, after seeing copied exhibited model of ‘On-dol’ in his visit to Japan, adapting heat transfer medium to water from smoke for apparent benefits. Thanks for the interesting video.
Kool info, thank you
yes, and Frank Lloyd Wright was very influential in Chicago area, and there are many residential buildings with his "gravity heating system".
not sure why he used "gravity" to describe his system, though.
일본은 온돌 난방이 아닙니다
맞습니다. 그 방식(보일러식 온돌시스템)이 1980~1990년대에 한국으로 역수입 됐어요.(미스킴 라일락처럼) 다만, 일본에서 그가 본 온돌은 일제 강점기에 일본이 한국에서 한옥 한채를 통째로 뜯어다가 일본에서 전시한 걸 본겁니다. 일본에는 온돌이 없어요. 많은 문명이 한반도에서 일본으로 넘어갔지만 온돌은 지진,기후 때문에 일본에서는 정착되지 못했습니다.
지금 미국이 세계 최대의 콩 생산국이지만 원래 콩의 원산지는 한반도,만주,일본인데 종의 다양성은 한반도가 세계 1등 이었습니다.
아이러니 하게도 현재 야생콩 종자 원종의 1위 보유국은 미국입니다.
한반도에서는 많이 멸종되었지요.
@@davidjacobs8558 passive water moving = no pump = gravity
Great idea I've thought of doing this but haven't found many videos on it
I need this so bad… I’m the one stuck feeding the fire all night till 4 am so everyone else can sleep comfortably 😂
Omg that sucks
I'm Korean
Ondol (O)
Ondal (X)
Ok
There is a big danger with ondal. I was stationed in South Korea and the 8th Army would not let any service member stay in quarters with this type of heating. If there is a crack in the floor, you can get carbon monoxide poisoning very quickly. Right before I arrived in country, a service member and his family all died because of this and we had to inspect all of the service members' off base quarters to ensure they did not have that system. Most systems had switched to circulating heated water under the floor.
Breathing in smoke is bad
A guy in my unit at Osan was poisoned by a carbon monoxide leak from his off base apartment's ondol floor. He almost bought the farm before someone went to check on why he hadn't shown up for duty that morning.
So, a more efficient fire plus CO detectors, would make that safer. Mass heaters are designed to burn very hot so about all that is left is CO2 and H2O. You would burn thru wood faster but produce more heat. So if there was a good way to hold all of the heat, like a heavier mass, then the results would be the same without the danger.
only with coal fired ondol. wood fired ondol didn't have carbon monoxide problem.
so, carbon monoxide poisoning wasn't an issue before the modern times, when they started using coal,
and now most homes don't use coal fire anymore, so became less of an issue today.
@@davidjacobs8558 They used a cylinder of charcoal, not coal.
I was thinking maybe having a tube on the side of your house made out of greenhouse glass with and inlet and outlet to your house may be a good way to provide passive heating and air flow.
Interesting
I haven't watched the video yet, so not sure if you mention this, but this seems like a larger version of a thing we call a 'rocket stove' here...
Ondal is similar but different than a rocket mass heater, watch the video
The rocket stove klan got it from Korea. It's well documented in the Cola-Cola-Cola book, written by Coka Coka, dated 1765. The subject is, as here, DIY. Cool soft drink without the aftertaste of smoke.
Canada had started building houses according to the Korean building tradition in the 1920s, but then came the Wall Street crash in 1929 and the Great not-great) Depression. Then came the Second World War. Then the Korean War. Then the Vietnam War. And then the Cold War. And finally the pizza war in the USA. Canada ditched the Korean house-warming idea in 1980 in favor of disco-dancing warm-ups. In the USA it was called the Jane Fonda Workout Dance, and the USA has never since grown such healthy vegetables as under the sound of the Workout music in the fields. It's been over 40 years, and a lot of North American discout wave since. In 2006, the cinema movie: "Idiocracy" was released.
The actress Denzel Washington was America's first black president in the period 2009-2017; followed by duck breeder Donald the Duck Rump.
AND thus so much bullshit fills the airwaves 24/7.
@@objektivone3209 You're quite insane, aren't you?
@@Tasarran Nooo what makes you think that? The lack of sense for art perhaps?
@@objektivone3209 ummm ok
So cool. Have never heard of it. Thanks for sharing.
Thanks for watching!
Perhaps "exhaust" is a better term than "smoke". Ideally the design of the burn core will be smokeless. Especially these days with the abundance of information about efficient stove design garnered through people like Broaudio and Sundogbuilders here on RUclips
Well said
I was in Korea in 1985 with the airforce and I thought the fuel was called ondal. It was a black cylinder.
lol
Not sure why you think a woodburner in a greenhouse is bad, most of the fires in them are electrical in nature.
I used straight junk like 2 propane tanks bolted together for years and no seal on the door, I just cut a slit with a grinder and used self tappers to smack a hinge on the cut the other three sides. That's like 3/16 gaps on all sides. What I'm saying is that it would runaway. But it had five 50 gallon drums and block around it so I let it scream.
The only real issue is short flues without screens dumping embers. That's not exactly an accident, that's not being qualified or doing research or following code.
Well said
or small house then put green house over it also works great
Ok
Great idea, but what about thermal couple refrigeration or electricity? Use the hot smoke, refrigerate food? Generate electricity to charge a battery, inverter, and free electric. I might start making them next month. Solar doesn't pay itself off very fast, sun, wind, and water are not always available. But if you have wood or fuel, you can live off grid.
Good plan
I suggest you be very careful lighting a fire under your house LMAO
The fire is beside the house, hot smoke goes under
Very informative.
Thank you Sir.
Thank you for the kind words
The 2 baffles would be the HARDEST to reconstruct.. Without draw would catch fire!! EXCELLENT IDEA!!!!!
Except it’s been working for what, 5000 years… facts suck
You did great explaining how it works thanks for the helpful video God bless
You are so welcome
To get most heating benefit out of ‘Ondol’ you do need to sleep on the floor and sit on the floor. Floor is the thermal mass and you want your body to be in contact with floor as much as possible.
‘Cob bench’ seems to be a segway from ‘Ondol’ since cob bench are found along lower Siberia steppes. Ancient Korean territories include Manchuria and Inner Mongolia. Ondol probably is more thermal efficient even without insulations.
Koreans cook three meals a day, and the cooking thermal energy all goes into Ondol. Some additional late evening heat may be needed during cold winter night. The ridges, slopes and channels under the floor manage thermal energy to control fire and spreading energy.
Well said
TY. ...and prob had, what Southeners in USA call, a "summer kitchen" OUTSIDE, away from house, to not heat up house during terrible heat/humidity.
yep the romans used this as well , it was brought to Briton and used in quite a few houses
cool
I came across a similar idea but it's called a Dakota Fire Pit.
I saw an ondol/ondal in a photograph but until now didn't know what it was called. I was calling it a dakota fire pit because it's basically the same principle.
Ummm ok
I'd do this but it would probably last less than a day until the fire department got here to put it out.
Lol
Though I'm cool with different opinions, I still think it's hard to beat the math in the science. If heat is what you want, nothing is going to be cheaper and work better than simply heating water and insulating first. Why? Nothing compares. Density 1000, specific heat 4190. We're not going to run out of it. It just makes sense. Remember the goal is heat measured in BTUs. 1 cubic meter of water can hold over 268KJ OR 64,049 BTUs, that only one meter cubed! Huge!
Disclaimer, not perfect for every situation but a greenhouse, it's perfect!
Also, calculations is water heated to 95 c from 31c, not 0 c. Why did I use 31? Because I'm use to working with fahrenheit. Lol.
95-0 gives you 95,073 BTUs.
Well Said
Thank you 🙏 📚
:)
I like this idea. How do you keep it burning all night unattended?
you don't, it's radiant heat that lasts
Thanks!
Thank you soo much for the support!
Nice. But how to clean it? And how often?
That’s what kids are for
Good video
Thank you
Rocket mass bench heaters definitely could be considered a new version of this
true
It was used in Europe as well. It even heated multiple floors at once.
cool
Thanks for another great video. Really appreciate all the ideas you give us. I would have thought a wood boiler and hydronic floor system would be more versatile but you are probably write that they aren't as efficient as a smoke heat system since there is hardly any escaped heat. Cool idea, never heard of the concept. Thanks again.
Thank you for the kind words
I am going to do this for my house. But I think I will use a heat exchanger to blow fresh air under the house, yet extract as much heat from the fire exhaust as possible. I could do the same thing for the 2nd and top floors as well.
Interesting
@@SimpleTek If there is a way to recirculate the non-combusted air, and without electrical power, that would keep more heat under the house to heat the thermal mass. Using a fan would defeat energy independence, and would be impossible with the power knocked out. It may not be possible to recirculate....unless I could harness wind power during the day, maybe from the wind mill operating the well.
I'm going to try this. Adobe cap. What about sand the channels?
Rocket stove with a pellet hopper.
@@mattwernecke2342 yep
Very cool 🤔
Thank you
I like it
Awesome
it's actually called 'Ondol'. On (thermal or heat) -Dol (stone or brick)
You are correct
Looking at the diagrams, getting enough draw could be an issue.
A metal flue with its intake at the furthest end of the underfloor chamber and then passes through the firebox in an "L" shape skyward might mitigate that without any fans or motors.
Maybe
Another way to heat your house is with a match and curtains. Again, it would probably last less than a day until the fire department got there to put it out.
Lol
Do you really need insulation beneath the house? Wouldn't the soil itself act as a geothermal battery? I can see the need for insulating the perimeter, however, way down into the ground.
it helps
Smoke in the house - most do not understand how much air-pressure and humidity after how a fire burns and how a chimney reacts. Running a cold fire can hurt results too.
After running an outside wood boiler for a few years I totally agree with what you just said
Yes in United States we call this a rocket mass heater
It’s slightly different but the principles are very similar
Thxs info
Any time
Couple corrections, 'most' heat from a wood stove doesn't escape, only 20% is going up the chimney. Outdoor burners are a lot less efficient.
Also 'smoke' isn't really the right description with a good fire going 'flue gases' would be better.
Ondal looks like a masonry open fire popular in the west, just laid on it's side under the building, maintenance on the ondal must have been a rough job
ummmm, ok....
I read a novel years ago about a Roman General in the 4th century BC who had a home built for his new wife before he headed off to fight the Gauls. I never understood the home heating system that he had installed until I watched this episode. This is EXACTLY what he had built beneath the floor of the home! The novel, although fiction, was actually based on the journals of this soldier. He was a real life Roman General. I had no idea this technology actualy existed as far back as then. WOW!
that's cool!
tell us title
Some people talk with their hands, this guy talk with his head.
That feels like a compliment
Thank you
@@SimpleTek no problem. Not a diss just an observation. Lol
I wonder if there's any way to do this with a concrete slab over it. Interesting!
Im sure there is!
А как чистить такую печь и каналы!?
how does sweep the floor? i have bench in one house, awesome to sit on if you come from outside in winter. needs cleaning. but how does one do this inside floor eh.
Long pipe?
They call this a rocket mass heater now. That way it's new.
Not really
I have a cool picture of a cut model of a Roman bathhouse heat system. I can’t paste it here.
Ok
dang, tell me where?
You have great content.
Thank you soo much!
You do Scott! You have so much. And your latest, so important.
Why couldn’t we combine the Korean style floor with the sand battery floor system? Just an idea. Maybe top it with sleet panels of some kind to give a hard surface on top.
I like it
So how does the creosote get cleaned out? Takes me like a half hour to clean my simple chimney.
good question? Korean midgets maybe?
@@SimpleTek steady work anywho lol
would this work with a hempcrete house?
Lol
ok now that's not a creosote fire hazard!
Gotta clean it out regularly
Maybe if you used abs sunken floor forms you could get a cavity below the structure and then you can vent air from the roof or warm environment. Extreme temperature and mold would might be a problem though. Maybe it could be a closed loop somehow.
interesting idea!
What supports the floor?
Pillars
Ondal>>ondol
On : warm
Dol : stone
Actually I think it dated back the oldest.. To 7400bc, it's almost 10k years old.
Wow
What about flammable build up
Yep
No need to clean creosote buildup?
It should be cleaned
Audio is not loud enough!
Fixing on future videos. Thank u
why would you insulate the floor against the heat that you want in? that suggestion, which is no traditional, and was made up, doesn't make sense.
where I live the ground is sub zero in winter
Tell us about a sand heat battery for greenhouses
Check my archives!!!!
Reading from a Korean Ondal web page with a lot of unnecessary filler
@@mazdarx7887 ok?
It's called Hamaam in Kashmir, India
Thank you!
i am about to start construction on a greenhouse and have planned to do a GAHT system. the trouble with it is i need power to move air with fans. i love the idea but have always thought what if one day there is no power. Two questions for you: 1. does the stove need to be below the floor level to draw the smoke, so i would have to dig a "walkout" for the stove. 2. could you run the smoke down the middle of the green house as a heat source and GAHT weeping tiles on the sides? would love your thoughts and ideas. i am looking at a greenhouse of 30x60ft.
Good questions. I think both are possible
getting the floor "air tight" seems to be a fairly tedious task. On the other hand, raw clay is quite sticky and maluable. Obviously doable. Interesting....
if they could do it 5000 years ago, we can do it now!
This is cool
Thank you!
ancient technology is aswome , but how about that heat transfer on that floor , what about efficiency ?
Obviously there are more efficient things now
@@SimpleTek i am thinking of using light aluminum sheets to build something like that but for my turtle. great video.
온돌 -> Ondol
You’re right, I f#@ked up. It’s ondol
@@SimpleTek Thank you for your clear explanation. Your pronunciation of 'Ondal' is similar to the Korean word 온돌.
not "ondal", it's "ondol"
Yes
Romans were well known for this system.
Korea was first
ondal? ondol? ondol !!
Ok
Ondal(x) Ondol(o) 온돌~~
Ok