Exhaust Setup for an 8 x 8 Grow Room Tent

by Kerry
(Washington)

I have an 8 x 8 grow room tent that I'm not sure how to setup the ventilation for (the exhaust and intake). Could you please draw a diagram how it should be setup. Thank you for your help!




Answer: Kerry- enclosed garden spaces such as closets, grow boxes, and grow tents quickly build up too much heat. Heat rises, so the number one rule would be to exhaust the grow tent from holes near the top. In the picture, you can see a yellow arrow pointing to the exhaust hole in this tent.

As you exhaust air, you create negative air pressure (a vacuum) inside the grow tent. Opening some air intake vents will automatically allow cool, fresh air to pour into the grow tent. Cold air sinks, so these air intake holes should be positioned low to the ground to scoop the coolest air right off of the floor. In the picture, there are red arrows pointing to a few air intake points.

          

In professional grow tents, there are usually velcro flaps over the air intake holes (like the rectangular flaps in the picture). This allows you to "customize" the airflow pattern inside your grow tent.

You will probably learn that your lights put off too much heat, and ventilating the grow tent with cool air off of the floor just isn't enough to keep your grow tent from over-heating. There are two other things you can do if your garden area is over 75*F. If you ventilate your grow lights with an exhaust fan of their own, this will prevent much of their heat from going into the grow tent. In the picture, you can see an air intake on the side of the tent connected with blue lines to an air exhaust on the other side of the tent.

Air would be taken from the room outside the grow tent, passed through your grow lights, and exhausted back into the room (outside the tent). In this way the air moving through your grow lights would be kept separate from the air moving through your garden area (inside the tent). One thing to keep in mind- it is best to exhaust all of this warm air to the outdoors. If you are simply exhausting it into the room in which you set up your grow tent, the entire room will become too warm to keep your grow tent under 75*.

If the entire room in which you have your tent becomes too warm, you will need to run an exhaust fan for the room (so you might as well exhaust the lights and tent to the outdoors to begin with). Any vents to the outdoors should have their fans running constantly....even at night. As soon as you turn them off, the vent duct will siphon cold outdoor air into your garden (from outdoors) and stunt the growth of your plants.

                  

As long as you set your grow tent up in a room that is kept dark, you do not have to worry about light contamination from the room making it into your grow tent during the flowering stage. It is critical that any dark period remain completely dark and un-interrupted. Finally, I included the other grow tent picture to stress the importance of air circulation INSIDE the grow tent.

Air exhaust is important to reduce temperature, reduce humidity, and bring fresh supplies of CO2 to the plants....but it's the air circulation around the plants (supplied by oscillating fans) that act as their lungs. I hope this answers your question....Happy Growing!

Comments for Exhaust Setup for an 8 x 8 Grow Room Tent

Average Rating starstarstarstarstar

Click here to add your own comments

Nov 17, 2013
Rating
starstarstarstarstar
Indoor Grow Kits NEW
by: Original Green Grow

Check out complete grow tent systems at www.hydrowboxgrow.com

Happy to see new people there and answer questions about getting set up for indoor growing.

Cheers, Original Green Grow

PS This blog is a GREAT resource!

Apr 07, 2011
Rating
starstarstarstarstar
exaust
by: Anonymous

If you are running the exaust dirictly through your light( the blue lines), do you still need to run an exaust out of the top? also i have 2 inline duct fans for the exaust, should i use them both on the light ( onr on the right d=side and other on the left with one pushing and other pulling going in same direction) ?? and last do i hook up my inline fans in the duct on the inside of the tent or outside?

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Temp & Humidity Control Q&A.

Check out all of Jason's recommended items.
Find out the cheapest and easiest ways to garden productively in this article.

Hi everyone, Jason from Jason's Indoor Guide here. When I got started with hydroponic gardening more than 22 years ago, my first garden used rockwool cubes and B.C. Nutrients....and I remember thinking to myself yeah, sure, there may be a lot of advantages to gardening with hydroponics, for example there are very few pest problems, therefore very little pest control, no weeding, no plowing or tilling the soil, no soil testing or having to add things into the garden soil, no watering the garden....but for someone who just wants to grow their own vegetables and have more control over their food supply and the quality of the food that they eat, the cost of constantly having to buy grow media and hydroponic nutrients makes this an expensive hobby for most people.

I suppose when you take into consideration how much money you save NOT having to buy food at the grocery store, it is surely cheaper to grow your own food hydroponically even with the cost of high quality nutrients. Nevertheless, I didn't have a whole lot of money to work with and I needed to make my efforts as affordable and effective as possible....and in the last 20 years I HAVE learned a thing or two!

As you browse through Jason's Indoor Guide, you will notice all of the systems that I use personally are homemade systems. As I got 3 or 4 years of experience under my belt, I quickly adopted a preference to standing water systems and systems that use expanded clay pellets or lava rock, because the media is re-usable and it eliminates a huge operating expense. So once a hydroponic system is built, garden maintenance is minimal- check and adjust the nutrient solution daily, and to change it completely every 2 weeks....and the biggest operating cost is the hydroponic nutrients. (and the electric bill, lol).

And, regarding the cost of the nutrients....I experimented for about 3 years with making different compost teas and nutrient teas, but there is still a lot of expense $$$ associated with making high quality nutrient teas....like kelp meal, liquid seaweed, rock dust, bat guano, un-sulfured molasses, worm castings. You can eliminate a lot of this expense by becoming an expert at making high-quality colloidal humus compost, and use your properly made compost as the basis of your hydroponic nutrient solution.



Make a year's worth of compost in one week!
What is colloidal humus?

Make the world's best compost


Unfortunately, I have been gardening for over 20 years and I have only just recently mastered this difficult skill....and even then, only because I happened to find a very easy to follow, high quality technique and decided to follow the instructions to the letter. I produced more high quality compost in just one week than I was able to use in a whole year! I highly recommend it. It is one of the top 3 things you can do to increase the productivity of your food production efforts, while at the same time decreasing the amount of effort required to grow all of your own food, and decreasing the total cost of operating your food production system.

And when I say decrease operating costs, I mean decrease them to almost ZERO, especially if you are producing your own nutrients.


High Efficiency
Hydroponics

One final solution to eliminate the cost of your hydroponic nutrients: Imagine a hydroponic system that does not require you to buy any nutrients, does not require you to make your own compost, and does not require you to brew your own nutrient tea. Seriously! No cost and no effort as far as providing nutrients to your plants is concerned. Plus, at the end of the gardening cycle, you harvest all of your garden vegetables, PLUS YOU HARVEST FISH from the system!


Aquaponics

Click Here to learn more!

This solution is aquaponics. If you are serious about producing all of your own food and being self-sufficient, this is the ultimate solution for reducing expenses (as much as possible), reducing the total amount of work required, and maximizing the productivity of your gardening efforts. I have been gardening for over 20 years, and it is the perfect food production solution in my opinion.


Produce garnden vegetables AND fish together. Eliminate fertilizer costs!

Besides mastering how to make high quality compost, learning aquaponics is one of the top 3 things you can do to increase your garden productivity, reduce your total costs, and reduce your total work. The product that I learned from is called Aquaponics4you. With all of my hydroponic gardening experience, the first time I came across the Aquaponics4you product I knew immediately that it was something very special! Place an aquaponics system outdoors and use the sun instead of grow lights, and you have reduced every garden expense to nearly ZERO!


High Efficiency
Soil Gardening

This is where my advice ends for people growing in water. But some of you out there are in love with soil gardening and organic gardening, and rightly so! It's a pro-human activity. It is pro-conservation. It is pro-life. It nurtures and promotes life at all levels, from the micro-organisms to beneficial insects, to healthy humans. It's natural. it's spiritual. Gardening is written deeply into our DNA, like how you feel watching a bonfire or sitting by the ocean or next to a river.

My friend John at Food4Wealth has more than 20 years experience organic gardening, so he reminds me a lot of myself. He knows organic gardening like I know hydroponic gardening, and over the years he has learned just about every trick there is to organic gardening. He knows what makes the plants grow, and he knows how to do it with as little effort as humanly possible. His garden never needs digging, naturally repels pests, has no weeds, always produces more than his family is able to eat, produces vegetables everyday all year round, and....only requires 8 HOURS of light, easy effort PER YEAR!


Low effort organic gardening!

Years and years of experience and results can't be argued with....the Food4Wealth gardening strategy is one of the top 3 things you can do to increase your productivity, reduce your total costs, and reduce your total work....specifically for organic gardeners who love soil gardening. THIS is the most efficient and productive way to do organic gardening, period! And combined with the ability to make a years' worth of colloidal humus compost in just one week (see World's Best Compost), this overall organic soil gardening strategy is just unstoppable- foolproof, low cost, and low effort!

Learn about high yield organic gardening






If you've found this site helpful at all, I would really appreciate it