9 Greenhouse Cooling Systems in Use, Private and Commercial
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- Опубликовано: 12 июн 2024
- 9 Greenhouse cooling systems explained in detail. From vents to air conditioning, cooling a greenhouse is a concern when temperatures go over 35'C. In this video Simple Tek describes 9 different ways people use to control and reduce the heat in their greenhouses.
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Let me know about how you cool down your greenhouse and what systems you use!!!!
;)
Shade cloth only on sunny side. If people and animals are not likely to intrude, take screens off fans or at least use 2" chicken wire instead to increase air flow. Have at least 2 openings for passive cooling. Best to have them as high as possible. Have the openings in line with the prominent summer wind direction. Use the lightest colour shade cloth you can afford.
@@nickguthrie9309 Thank you for the detailed reply! Where are your located?
I use a combination of things, I have ventilation and a big ultrasonic humidifier (5 liter/hour) on a thermostat and shade cloth for the hottest days. It's just about enough to keep the greenhouse (3x4m) below 40C on the hottest days ;)
Would a right angle green house work just the same with good ventilation?
Great video - answered a lot of my questions. Thx.
Glad it was helpful!
Informative vid. Thanks. Need ideas on setting up a greenhouse in hot desert climates
Thank you!
Great video! Thank you for sharing these options :)
Thank you! I appreciate the kind words!!!
This is a wholesome man. U just earned a sub man!
Thank you!
Excellent piece of information.
thank you!
Thank you for sharing your knowledge.
Thank you for the kind words
Can’t wait to get mine up this year
You keep saying that, you really need to kick your husband in the rear and get him to put it up for you!
Amazing Channel - greetings from Italy!
Thank you! Cheers from Canada
Excellent video!!
Thank you very much!
thanks for amazing and helpful video
Happy to help
Thank you. Very informative 👏.
Thank you for the kind words
Thank you. Mist spraying is the way to go for me
good idea
Had a private greenhouse in Saudi Arabia. We grew orchids. One thing we used was called “desert coolers”. It sucked in the humidity and cooled the moisture by blowing air through it. Then blew the cool air out thus cooling the greenhouse down and taking some of the humidity out at the same time. We did use shade cloth also. It was a glass greenhouse. Average outside temperature was 118 F. with 98% humidity.
thank you for the comment!
Do you mind if I have more info on how it worked? You mean basically those cheap window ac that work so well in the humidity. I am in saudi and want to make a greenhouse, would love more info on how you cooled the greenhouse and the build overall
Funny enough, Americans call "desert coolers" "swamp coolers". Though they make the air swampier, I was happy to see these coolers work BEST in the desert!
Tips: 1) use the misty foggers also outside, 2) transport the coolness of the forest (at least 5 Celsius cooler in mid summer) into your greenhouse.
misters work!
There is also digging the greenhouse into the ground, having some plants that are suited to your location, wax filled automatic vent openers, etc
true
That's what most informed gardeners do
So much to learn
yep
Hi. I really enjoy your channel so much that I want to build my own passive solar greenhouse. Thanks
Thank you!
Thanks
Great vids, thanks! :)
Thank you sooo much for the kind words!
Well done sir
Thank you!
Problem with too much moisture in a greenhouse is molds and mildew. If you were to use water for cooling you'd need to ventilate and other ways to prevent mildew like using sulfur.
good comment
Great video
Thank you
thanks for the video, informative. I live in an arid, dry weather area, outside temp gets in summer goes up to 50C , , noticed nurseries use evaporative coolers coolers, and shading , do we need outside air, hot and dry to pass behind the evaporators to be more effective??
evaporators use outside air bringing it in, and work best in dry climates
Ironically I am in the window film industry. I manufacture High end Ceramic films that are virtually clear and yet they block 90% of the infrared spectrum. I am thinking about building a glass greenhouse now. Apollo Window Film Ultra Sky Series 73% VLT 90 IR We use on windshields and entire vehicles when you want performance and still see. Can also be used on residential or Architectural Windows. The old adage You dont have to go dark to block the heat anymore!
sweet
Can you make a short video showing us the film?
Thank you.
Thank you for the kind words
@@SimpleTek Thank you for all this useful information. :)
Cool thanks
You bet
Also mention below grade greenhouses! The walls are the sides of a deep pit' which is lined with bright white material. Combining this with earth tubes, and you can get -20 with ambient, and you only lose perhaps 2 hours of daylight.
Obviously, your water table needs to be deep, but I'm in chaparalle so it's not an issue.
walipini are great on heating and cooling but get less growing light
@@SimpleTek True, but if you don't have to use shade cloth in the summer, it's probably a wash.
@@timothyblazer1749 depends on where you live
@SimpleTech: Nice video, i live in costal area of Andhra Pradesh, Indi. I have a question if my area temperature in general is from 30 to 46 degree centigrade. What would you suggest to get down to 20-25 degree centigrade with low cost to maintain. Thanks
I like the earth tubes idea. Is there a way to control the temperature tho? Maybe with a automatic temperature sensor on the fan to control the fan speed?
you just use a thermostat to start and stop the fan controlling temperature
Heating and cooling has been a challenge for me, You have given me many great options to research for heating and air.
Glad to help
I am located in a 5b zone in Canada. I would like to grow year round. I would be interested in hearing more about your research.
Hi great channel. Im planning to build a greenhouse in a tropical climate and above 70% humidity. Can you recommend me what sort of system should i use? Can you guide me from scratch? Im willing to learn, and this will mean alot to me and my family. Thank you
I'd love to help, but I need more information.
what kind of material will the greenhouse be on, rock, clay, gravel, etc and how deep does that go? What are the average ground temperatures there, at 2 feet, 4 feet and 8 feet down? that data will help a lot
Hy Grand Master Greenhouse, Was wondering if you may have any sugestions on a 1200square meter greenhouse with invidual 200square meter rooms and on top of the it all has to be seald for GMP medical use. Would you have any sugestion on an efficiant and sustainable method?
Money ist not realy an issue. Looking forard to hear from you
Jay
if money isn't an issue just use large air conditioning units. they work but use a lot of energy and are expensive to install
NW Arizona gets triple digits 3 months in summer; my 12x16 greenhouse hasn't been through a summer YET, because I just built it (October). I plan on using shade cloth in summer and have high-level vents along the top 1/3 of the wall on the NORTH side of it, and east and west sides have windows with screens; I also plant to have grapevines planted outside that will shade the greenhouse in summer but drop their leaves in fall for sun light in winter. I hope all that works. I have no money to spend on AC .
a water evaporative cooling wall might be an option in Arizona - they work well in dry climates if water isn't too expensive and don't cost too much.
@@SimpleTek I have a water evaporative COOLER I bought years back from Home Depot that will work - portable. on wheels...I paid $400 for it...good idea a cooler - l like that.
I'm in AZ too--Bullhead City area.....how are you doing with it so far?
I’m using solar panels hooked up to a generator to power my fans. Also I’ve added castors to the greenhouse to make it mobile to be able to move it.
That's awesome
Great share, do you think these techniques put together will work well for a Mediterranean climate? In a way where we can spend time inside all year long for work and resting? Of course along with growing alot of plants and having Aquaponics system.
Any other recommendations?
I'm in a northern climate so it's not my expertise - but your location and humidity will determine what options are available to you. A dry area with low humidity will be cheaper to cool than a humid area. Ground temperatures a few few down will be a big factor where you live as well
Simple Tek thanks, yes we are dry and hot in summer, wet and cold in winter.
so how deep you would go?
@@m.s683 in most places the deeper you go the more stable the temperature. You can do it at 4-6 feet but 8-12 is much better, and the larger the area you put the pipes int he ground the better your heating and cooling. it depends on the machinery you have available to do it with. For a large excavator, 12 feet is no issue, for a mini excavator 7-8 might be all you can do.
Simple Tek we already went on and did the system before I saw your answer. We have to layers, one at 1.5 meter deep and the other at 60 cm deep. We’ll run it when the fans are installed and hope for the best. Thanks for the support.
Yeah, by the way how you produced your video with ur person in the corner. Great format. Softwares? Tips?
Hi just watched your video and found it very interesting I'm living in Thailand and looking at growing in greenhouse rough 30 metres long by 10 metres width about 4 metres height what do you suggest will be the best ventilation for this size of greenhouse and cheapest
I have several videos on greenhouse cooling and ventilation in my archives - check them out!!!!!
Where I live humidity is an issue and it's not what you may think. It's too dry. So when I vent with fans and an earth tub the humidity drops to the single digits so evaporate cooling is a must. Are there evaporative blackout walls?
Good question, I don’t know
2:09 I wonder if you can run this through water? I am from a hot and humid area, and my farm lot has a small creek, with cool water coming from a mountain spring, what do you think if I run a tube along this creek, then back to my greenhouse?
Absolutely!!!
Can I put freezer blocks in to the water reservoir of my misting system in order to get temperatures go down even more?
interesting idea. not sure if it's the water temp or the phase change that lowers the temp with a mister. if it's a phase change, I don't think ice won't help much. Try and let me know
Hey,
Once again I'm here with my strange ideas. And for this I'm thinking of using a solar heater in the greenhouse (but taking "cold" air inside and giving "hot" air outisde).
It's not a perfect solution and will not cool the inside but it could be enough for where I live to keep inside to an acceptable temperature (+ ventilation at night and/or earth tubes).
What you think? :p
need more details?
Yes, you can use a furnace to cool something.
I live in a hot humid place with wonderful cool nights , I have no air conditioning in my house , instead I have super insulation and a lot of night time ventilation.and I use a lot of reflective insulation .
very interesting! Thank you for sharing!
what is the temperature in a greenhouse during the hot summer. How can it be reduced to 68-72F (20-22C) at 2feet (60cm) level
the temperature will vary depending on location, elevation, humidity, amount of sunshine and such. need to know where it is before offering a solution - different places use different systems
I'm loving your content! Been bouncing all over the archives. What I want to do may very well be impossible, but I'm trying to find a way to provide freezing temperatures to fruit trees in a desert environment in western Texas. Something like moving the trees from field to freezer might be the only way but the scale of that freezer is unfathomable.
Thank you for the kind words.
Why do you want to do that? I might have an idea
I’ve got myself some remote property out in the middle of the west Texas desert. I’ve dreamt of turning it into a permaculture demonstration site. In addition to that I wanted to have greenhouses to recreate exotic environments for various kinds of fruits and spices. Some fruit bearing and especially sap bearing trees require freezing temperatures to be productive in the spring. It does not stay cold enough for long enough here for me to harvest sap from maples and things like that were they left to grow in a field. I’d like to devise a way to make a harvest possible. The property is 100 acres so there’s plenty of room to grow and my imagination runs wild with this stuff.
@@brandonfranklin4533 that’s tough. I’ve harvested maple syrup here before, I understand what you need. Anything is possible but reality is if harvesting maple syrup is your dream, it’s time to consider becoming Canadian lol
@@SimpleTek I've considered it on more than one occasion, lol.
@@brandonfranklin4533 land on the prairies an hour out of the cities is still pretty cheap
For growing cactus and succulents do we need to cool down
Thank you for the comment!
Do you have any info on an NVAC greenhouse for residential application?
sorry no
With a stirling engine using the excess heat or a steam engine with alcohol or some other refrigerant mixture which boils above the temperature you want to keep the plants at and which uses the excess heat, both could be used to run an AC system to cool the greenhouse. Unfortunately, those things are not very popular (yet). And maybe sunscreen can be used inside the greenhouse's windows/film to reduce the heat from the sunlight, and a light pressure washing would wipe it all out. if the sunscreen is non-toxic and biodegradable, then it could be washed off without issue at any time, and if not, just cover the plants with some waterproof tarps, and wash away! Sunflower (cooking) oil has a SPF of 15-19, if you're interested.
thank you
Can you recommend more readings on which you would use to cool a greenhouse in southeast texas that has both high heat and high humidity
@@Juniperlaneestatesales You could use Aside for maybe geothermal cooling, which is basically moving the hot air into the cooler ground, to heat the ground and in exchange cool the air, and maybe use a small section with a non-glazed ceramic piece through which water can get (so not waterproof) so if water condenses there from the high humidity in the air, it can get absorbed by the ground. If you grow trees, you can use a dark-colored mat suspended some distance away from the soil, and possibly even having multiple such layers (i.e. brick-mat-brick-mat-brick-mat-brick) to better insulate the roots. Though this won't protect the trees from the sun, it will prevent the soil water from evaporating. You could also cover the greenhouse with a reflective material (like a white or bright-colored tarp), to prevent sunlight from getting in the greenhouse. You could even use solar panels above the greenhouse (so they stay cooler) or in the greenhouse (if you get hail or too many birds pooping), to reduce the amount of sunlight the plants get during the hottest hours of the day, and the excess energy can be used with an AC system to cool the place. The solar panels can be orientated towards where the sun is at it's highest, and might require manual re-adjusting every few weeks, which could be done in 10-20 seconds per group of 3-12 panels (even more panels, with counter-balance weights), if you make a simple tilting mechanism with locking pins or screws (i.e. those screws which don't need a tool to tighten, and can be tightened with a hand). Solar panels + farming = agrivoltaics. Geothermal air cooling = pipes under the ground and a fan to move the air.
@@SapioiT thank you!!
@@Juniperlaneestatesales My pleasure! I hope it helps you!
i really enjoyed the video.
Thank you for the kind words
Hey Boss! How about cooling a greenhouse, in Coastal areas, where avg temperature is around 27 Celcius and humidity is around 80%. Your reply would be appreciated. Thank you.
Why use a greenhouse in the first place there point is to warm the environment
swamp coolers are out with that kind of humidity. Air conditions would work but very costly with electricity and setup. How's the ground temperature? You could use an air or liquid geo thermal type system that wouldn't bee too expensive if you have ground temperatures under 5 feet that are less then 15' C???
there's controlled environment advantages
What would be the best way to cool down a small home garden greenhouse in a humid country like Thailand
If ground temperature was high, and humidity was high… I’d insulate and use a solar powered heat pump
I'm thinking of building a Shadehouse on my terrace, Winter temperatures are not an issue here as it doesn't go below 16C at all. But the Summer is super super hot here. It regularly gets to 40C for 1.5 Months and can reach upto 45C for nearly 2.5 weeks with humidity at 19-35% during the hot times. So does using 50% Aluminets, Foggers and/or ultrasonic humidifiers and Ventilating and circulating fans allow me to get down the temperature in shade house below 34C for growing orchids???
Is this even a good idea??
you should try it - if done right it can reduce tens by 10-15'C
Omg thanks
Not entirely sure but but believe there is some research going on to filter out infrared components which reduce the heating factor and also produces electricity.
very cool
I would like to design and build a special greenhouse for plants two zones greater that mine. I want to put a brick fireplace on the North Wall, passive adjustable vents on the East & West Walls, and a door on the South. I also want a height of 12 feet. What do you suggest?
It depends on your budget and what you like. For an inside fireplace I suggest a rocket mass heater - you'll have to put wood on the fire a lot less than a traditional fireplace.
Simple Tek I am hoping to keep costs down to a $3000 hit. What I am actually asking is where to start with my research. I have some rudimentary skill as I have designed and built a mailbox, an X Gate, a rack to grow grapes, and a Deck to accommodate a Sun Room.
Hey clayton.
I don't know how big you want to build your greenhouse.
But I'm just finishing building a 10x12x15.
It has 8 foot high walls.
I used that polycarbonate panels, 26inches x 8feet.
Very time consuming and once you buy everything to install them it's kinda pricey.
If I had to do it over again I would go with the double walled 4x8 sheets. It would be a lot faster and easier.
The 4x8 sheet's are like 80.00 bucks. But once you buy all the plastic end peices and everything else to install the 26 inch x 8 foot sheets you got like 70 bucks into it.
And the time you will save by going with the 4x8 sheets is way worth the little extra money.
What I did for air flow ( and I'm hoping for cooling it down some) is I put 2 vents above the 8 foot walls at one 10 foot end.
And then on the other 10 foot end I put 1 bigger vent.
Then about a foot down from the top of the 8 foot high walls on the 12 foot run I put 2 exhaust fans.
And that's it. I'm just putting on some final touches. I haven't even started growing in it yet.
But what I'm trying to get at is just this only has cost me 2500 bucks in material.
So your estimate of 3000 bucks might be a little low.
Sorry this took so long.
Anyway best of luck to you.
Thank you so much for sharing. I am first year greenhouse growing in my back yard. I just lost all my seedlings when the sun came out one day during 20 degree weather and I was at work. My greenhouse reached 119 degrees . killing all my seedlings. I started all over. Please come check me out when you can. Join if you like.
Glad I could offer some options to consider!
One question - i get critters in my greenhouse if the door is open all day. Any suggestions on that?
Cats!!!
indeed. i've got an akita who wouldn't be very sympathetic but yes, most farms have ferral cats to keep the critters to a minimum!! you present great ideas for the heat in this video. Thank you!
The only time I didn't have problems was when I let an onion grow in the same location as the other plants.
Even the field mice tend to avoid the area afterwards.
I just take an onion from the kitchen that started to grow and let them grow in the garden all summer.
The plant is relatively small and can provide seeds at the end of the season so it's been my go to since I discovered it.
Even being out in the woods it seems to keep alot of pests away.
Are underground greenhouses cooler than above ground ones?
Probably but there’s a sunlight issue the deeper you go
Next week we are looking at 100F all week. I have a few things in place but trying to be ready for the worst
being prepared is smart!
How about using a heat sink ,just like computer, my plan is using evaporating fluid in iron pipe nd seel it nd using geo thermal energy nd cool it with just a fan
ok
So if you limited the spectrum of light passing through the window tint to only allow red and blue. When you were inside , although you should find some reduction in heat, your plants would appear black, and thus would become very hard to care for since most things we identify with our eyes, such as funguses or any other fine detail that might be lost under anything but the best lighting conditions...... that being said you see that kind of grow op all the time in tent growing with a set spectrum led setup, so it is quite feasible that you could train your eyes past it.
interesting!
Why not a small head led light to provide the white light while you are looking at the plant.
almost at 8K subs...
betting it tops 8k today!
;)
Has anyone developed an air conditioner that cools water directly? I am thinking about a hydroponic type system where the water circulates through a chiller. Maybe the water contact is over a ceramic surface that is cooled by an A/C system.
interesting - thank you for the comment
Hi 🙏May I ask? so in this video, no. 8 geothermal System, its use a heat pump?? Thats the different beetwen earth tube with geothermal. Sorry, im new. Thank you
I don't use one but you can
@@SimpleTek 🙏 between the earth tube system and the geothermal heat system, which system can produce cooler??? or the same. I need your opinion. because I am still confused about using the earth tube or geothermal heat pump system. 🙏🙏 thank you for your reply
@@iphoneblack1 depending on your location, cooling is usually cheapest by vents, fans and evaporative walls. you can cool with a geothermal system but if you're adding heat use it as a thermal battery, then it won't cool.
Spraying a mist on plants will do the trick but carries the danger of mold
true - it depends a lot on your humidity though
There is a smart film that you can turn the tent on and off if I can find the link I’ll post it back later
Please do!
how much sunlight do greenhouse typically need?
as much as possible
How do you cool your greenhouse when it is 38 degrees outside?
me- it's dry here at that temp so I use misters
Modern agricultural intelligent glass greenhouses achieve the most suitable temperature, light, water, steam, fertilizer and other conditions for the growth of plants in the greenhouse by adjusting the shading system, ventilation system, ventilation system, cooling system, and heating system of the greenhouse.
those usually completely ignore ROI or work on a 20 year payoff. I want one to two year payoffs
My mister is 12v direct to a big solar panel so it only goes on when sun is hottest or full.
Smart
You can also buy peltier ceramic coolers that will take any voltage and cool a large alloy heat sink on opposite side. Aussies and Canucks were far away resourceful places once.@@SimpleTek
@@441rider ok
Does RUclips have a way to filter Canadian videos out of my search???
I understand, you need to be smart to understand Canadian videos.
Tubes length is primary for transference, transference efficiency can be increased but I want to try it before I add my idea to this mix of brought together info. Efficiency talks to running Geo without compressors like ground source heat pumps utilize but using a compressor takes away the real efficiency in electric costs. Need higher transference, think I might have the answer but am not quite there yet.
Thank you for your detailed comment! Once you have the answer please share it with us!
@@SimpleTek I will, we need to conserve resources not just keep wasting whats left!
Hint: plants are natural compressors. they use free solar energy to convert liquid water into water vapour. It takes approx 1000 btu of energy to convert one pound of liquid water into a gas. A greenhouse full of plants convert a massive amount of water every day for free. When you take full advantage of what nature provides for free, its possible cool a sealed greenhouse in full sun from 140F to 68F in a little under 12 minutes.
@@JohnGuest45 That sounds a bit much - this is where math and reality don't match. lol
@@SimpleTek
I guess i must have dreamt doing that test. If you put your entire greenhouse air volume underground once a minute it doesnt take long before the greenhouse air temperature matches the ground temperature. If i had run the overhead misting system during the test, the temperature drop would have been a lot faster. The only thing that doesnt match is what folks imagine will happen and what actually happens.
My way of cooling the greenhouse in the summer is to take off the plastic insolation.
that works!
Tinting may block some rays needed for plants
good point
What if you mist your earth tubes?
Interesting idea if it involves a phase change
I assuming you want more UV rays for better growth, if your growing food, no?
plants growing better when UC rays are defused
so whats the point of the green house if you have the roof open why not just grow outside ?
Controlling temperature at night as many areas go sub zero at night but are warm in the day
I have what I call a greenhouse, it's actually not a greenhouse. It's kind of a more sturdy, overbuilt hoop house covered in Nylon mesh rather than a solid plastic sheet covering. In the very hot and humid climate of central Thailand I am always on the lookout for some economical method of cooling. I use 40% shade cloth to protect the more sensitive plants and wonder if fans would offer much in my circumstance. Evaporative coolers wont work given the open airflow of the mesh covering. I am already at about the same temperature inside as out so I assume there isn't much more I can do given financial realities.
the only thing I can think of is asking what is the ground temperatures at 2,4,6, and 8 feet?
@@SimpleTek Hmmm, not sure but I am not in a position to dig it up and install ducting if that is where you were headed. I maybe should have mentioned, this screen house houses an aquaponics farm. In other words, there are concrete troughs and other structures that would make digging impractical without major reconstruction.
@@9squares why do you have to dig under the greenhouse? if you're using the ground for cooling, you can use air or liquid lines and they can run undergound outside of the greenhouse, for cooling it's better if they run long distances too and aren't coiled up.
@@SimpleTek Are misters effective?
Lol, rough opening there!
As a greenhouse owner my whole life… there is basically no way to have a greenhouse that is eco friendly. They all either use energy, create and trap heat, and they ALL require the use of building materials like plastic, and any automated system is the same.
It sucks but just like you said, not sure how cooling a greenhouse will help climate change, but cooling will help YOU grow bigger better plants” and that’s the issue.
Most things are like this, they don’t help “us all” but they help the individual that owns it, at the cost of everyone else :(
Well said
What about retractable roofs
Ok
👍
;)
What about heat pipes like they use on computer coolers
interesting idea
@@SimpleTek i am building a prototype with copper pipes
will send some pics and performance data when i am done
there is a very old tech for cooling enclosed spaces . 1 passive ventilation combined with 2 earth tubes that incorperate 3 evaporative cooling ... wind towers or something close used in desert of africa ... youtube is awesome university
nice
@@SimpleTek i live in the high steppes of Utah US ... temps this year have climbed over 100°F a record number of times ... when the humidity is over 20% i expect it to rain... so keeping cool is very important. follow you to help me design my future offgrid homestead... heating isnt so much a problem as it rarely gets to 0°C
cheers mate
ocean is a giant, also the ground, a thermal battery, store into lava, like the core
you could have separate layer of solar heat collection, on top, using artificial conditioning, light, inside the actual growth area, multiple stacked growth container
interesting
The music
Awesome isn’t it!!!
This voice is VERY familiar!!!!! Lol
Thanks!
Reindeer tears work great.
Yes they do
No roof on earth. Wtf was that cartoon@ the beginning with earth having a roof... around a ball. Lmfao. The only way you get a greenhouse effect is with a roof. Just saying👍good video.
thank you
@@SimpleTek you're welcome😁👍.
less light less growth is inaccurate
True, there are exceptions
get to the point
I guess fast forward is too complicated for you…