If your grow room is the DIY type (like a closet), you may want to look into weatherstripping the door, and shutting off any type of opening it may have. Either lower the speed on your fan, open up the passive air intake windows on the bottom of your tent more if possible, or consider installing an active air intake fan, which is the same as your other fan but on the bottom of your grow tent pushing air inwards. If you put the fan outside, youll need to find a way to make it rest in a good position. Secure the grow tent duct sleeve tightly around the fan ducting. Not all fans include hangers, so make sure youve got them. Other fans are designed to deprive the motors of power in order to adjust fan speed, causing the fan motors to get noisy. Step 1. Our Northern California based experts can help. Confirm your components are the in proper order: Outside air is passively pulled in through the bottom intake ports up into the filter (passing air through the lights), which then moves the air through the inline fan and out the exhaust holes. Note: Grow tent inline fans arent manufactured to the exact CFM output you need, so you may have to go over by 50-100cfm when picking a fan. Instead, the inline exhaust fan will suck the air out of your tent creating a vacuum. Once you have determined the necessary CFM for your space, you can decide on your ventilation setup. An exhaust fan (were going to be using a passive intake). Meaning the temperature in your grow tent can be higher, and your lights more powerful. If you are using a carbon filter, this will further reduce your fan performance. Youll need enough for the fan and ducting. If you ask me I think hanging inside the tent is easiest. Then, connect to your reflector to your exhaust fan, and finally to your tents exhaust port. We have an entire guide on dealing with grow tent heat, and another full guide on grow tent humidity. This in turn can prevent the leaves from absorbing enough light to properly photosynthesize, which impedes proper growth. The air from your grow tent needs to pass through your filter before being exhausted outside. Thats wheregrow tent ventilation and exhaustcome into play. For starters, theres two ways you can set up your ventilation, passive or active intake. The carbon filter is optional, but if you want to prevent odors escaping your grow space, Id highly recommend one. Get exclusive discounts & the latest product releases. For instance,any sharp bends in your ducting will significantly reduce airflow efficiency. Alternatively you can exhaust the air out of your tent first, and then duct it into your CO2 filter before letting the air out (second picture). Depending on the stage of plant growth, you will need various humidity ranges. This will help you keep temperatures down, as well as keeping the light bulbs cool, since HID lights output lots of heat. Which end of the grow tent fan do I connect the carbon filter? Therefore, when using a carbon filter you must add an additional 20% to the CFM recommendation to account for the loss. When ventilating your grow tent, you need to know how much fresh air must be provided to ensure healthy growth for your plants. Here, you will learn more advanced ventilation strategies, along with how each factor in your environment affects the others. Copyright 2021 420ExpertGuide.com; All Rights Reserved. For the majority of grow tent growers, a passive intake system works perfectly. Find a method of correctly dealing with heat and odor without venting the air outside of the grow room. So for a 4x4 grow tent with an area of ~106 cubic feet, a grow tent fan (inline fan) rated for ~215cfm would get the job done. Be aware that ducting can transmit light into an otherwise light-proof grow room if not setup properly. Make sure that your units BTU output is well matched to the size of your grow tent. Adjust them to the length youll be hanging the fan. Have questions about your grow? The ultimate ventilation setup will be one that not only keeps your crop healthy, but also discreet, minimizing noise and odors. Make sure it still has life in it, as the activated carbon loses effectiveness and the filters performance decreases. As an Amazon Associate I earn from qualifying purchases. In open loop systems, one option is to directly ventilate the lighting through the use of an air-cooled reflector. If you have 8 inch ducting for a 6 inch grow tent outlet, youll need to buy a ducting reducer. So there are two fans working together. If youre using HID grow lights its very likely that your hooded fixture allows for ducting. You can also set the fan to turn on when temperatures reach a certain level. There are so many things that factor into it, and so we encourage you to check out our definitive guide on grow room atmosphere and ventilation. A majority of people choose the passive method, which works fine. One method to avoid that is by pumping out the old air and replacing it with new air. 10.3389/fpls.2019.00495. HBX Basic Grow Room Intake Ventilation Kit, HBX Premium Grow Room HEPA Intake Ventilation Kit. Air cooled grow lights (most type of lights, such as LED, create almost no heat so dont need to be included in your ventilation setup). What if the size of my duct is too big for the duct hole on my grow tent? The new air gets pulled in naturally as the fan creates a low pressure environment inside the tent as air gets pumped out. These can all affect how hard your fan needs to work to achieve the perfect growing conditions. To ensure peak performance, make sure that all kinks and wrinkles are smoothed out. You can connect it directly to the fan, or use ducting in between. Harvest Waste Disposal - What Should You Do With All The Leftover Plant Matter? You can clean a carbon filter with pressurized air. Secret Jardin Clip On Monkey Fan for Grow Tents: Ideal Grow Tent Temperature and Humidity for Growing Cannabis: Other Resources for Growing Cannabis Indoors: How long will it take to hang my grow tent fan and duct? A Reddit Survey. So you should consider adding an oscillating fan to your grow tent to keep the air moving, which prevents mold and mildew spores from taking root. So you may want to inject a little extra CO2 into the atmosphere of your grow tent to improve your plants health and increase yields. The one thing you do want to make sure of when picking a carbon filter for your grow tent fan is that the diameter of the connection point on the fan and the filter are the same. Photosynthetic response of Cannabis sativa L. to variations in photosynthetic photon flux densities, temperature and CO2 conditions. Physiology and Molecular Biology of Plants 14.4 (2009): 299-306. So the total volume of air in a 4x4 grow tent is 4ft (length) x 4ft (width) x 6.667ft (height) = 106.67 cubic feet. To such an extent that the worst cannabis problems and leaf symptoms come from bad ventilation. Most grow tents fit 8 ducting, some may only fit 6. If you want to grow with discretion you can use your exhaust system to your advantage. 2011-2022 Hydrobuilder.com - 312 Otterson Dr STE D, Chico, CA 95928 USA. If the smoke snakes towards the intake, is an excellent sign that you have achieved good sealing and negative pressure. Place zip ties or metal brackets on the attachment area of your grow tent fan. 
The setup for both methods is fairly simple provided you have the necessary parts. With an active intake system, you will place an additional inline fan at the bottom of your tent to pull in fresh air through an intake port. Yourgrow tentshould try to replicate natures growing conditions. Do I Need an Oscillating Fan in Addition to my Inline Fan? Yes, but it may decrease your fans power efficiency a little bit. At the end of the day, the plants you are growing have a pungent smell once they start flowering, and it will only get stronger through harvest. If youre running an active air flow setup, Id recommend running both fans at the same speed so the air exiting the grow tent is equal to the amount of air re-entering. The most efficient setup would be routing the duct out a window so the hot air from your tent doesnt just blow into the room where your tent is located, thus getting sucked back in and rendering the whole process useless. The more you leave airflow to chance, the more you can expect to be disappointed by lackluster yields. Attach the carbon scrubber to the inline fan so that the fan is pulling air through the scrubber you can use ducting or simply connect them if they are the same size. 
My goal is for 420ExpertGuide to be a one stop shop for indoor growers to find the information they need. Its up to you. Im going to lay out everything you need to know about selecting an inline fan for your grow tent, and getting it set up properly. The clip fits securely on grow tent support poles. Ventilating your grow roomis way too important. Its not about completely eliminating them, but more so minimizing & masking them. Youre going to need to have direct airflow going through the lights reflector. But, as we saw above, you can also attach a silencer which will dampen your fans sound. Do all carbon filters come with pre-filter wrap for the exterior of the canister? You should be replacing the air in your grow space at least every 5 minutes when the lights are on, and even quicker if your environment is struggling to combat heat or humidity. We will do this with aluminum ducting. So if your grow tent has an intake hole thats about the same size as your exhaust hole, your tent will lend itself well to an active intake system. You can try leaving your carbon filter running 24/7, but this can mess with the environment and suck all the moisture from the room. And either connect the fans exit port directly to the exhaust hole, or by ducting it if you find it more comfortable. Finally, take the incense stick to the outside of the tent, and place it close to the intake hole. When your ventilation components and tent are physically in front of you, setup and configuration makes sense, so dont worry. JavaScript seems to be disabled in your browser. We carry a wide selection of dehumidifiers, ranging from small portable grow tent units to commercial grade units. The inline fan removes and replaces the air in your grow tent, but doesnt really circulate it well. Most commercial tents take measures to ensure a good enough seal. Without a properexhaust you may find yourself with a damp grow space where mold and fungi will start to develop. Get this right and the only place where youll be able to smell cannabis is when youre actually inside your grow tent. Let me give you an example calculation for a 4x4 grow tent, which is a pretty common size among indoor growers: Most 4x4 tents measure 48in x 48 in x 80 in. Check out my full article about lowering grow tent temperatures. The canister diameter on a 4 inch carbon filter would be more or less 6 inches. I recommend a fan with adjustable speed settings like the AC Infinity S or T Series so you can adjust the CFM to your specific requirement. Then you need to make a few additional considerations, such as 25% fan power reduction if you add a carbon filter, and 30% power reduction for each 90 degree bend in your ducting. So worry about getting the proper CFM rating. Inline and oscillating fans serve different purposes in the grow tent, so you should consider using both if possible. Thats the CFM rating youll learn about below. New Growers Start Here Complete Supplies List! Also, try and keep your path as short and straight as possible until the air is outside the tent. : That means you need to exchange 108 cubic feet of air per minute in order to properly ventilate your 128ft3grow tent. Passive or Active Air Flow For Your Grow Tent? Attach the hangers along the support bars of your grow tent ceiling. Cannabis plants can only thrive in certain climate conditions. (On top of that, a sealed tent helps keeping ambient light out during plants dark hours). Add ~2 inches to the outlet size. Step 2. GET EXCLUSIVE MARIJUANA GROWING TIPS & GUIDES. Alternatively, an active intake system uses a fan to actively draw air into your grow tent.
The setup for both methods is fairly simple provided you have the necessary parts. With an active intake system, you will place an additional inline fan at the bottom of your tent to pull in fresh air through an intake port. Yourgrow tentshould try to replicate natures growing conditions. Do I Need an Oscillating Fan in Addition to my Inline Fan? Yes, but it may decrease your fans power efficiency a little bit. At the end of the day, the plants you are growing have a pungent smell once they start flowering, and it will only get stronger through harvest. If youre running an active air flow setup, Id recommend running both fans at the same speed so the air exiting the grow tent is equal to the amount of air re-entering. The most efficient setup would be routing the duct out a window so the hot air from your tent doesnt just blow into the room where your tent is located, thus getting sucked back in and rendering the whole process useless. The more you leave airflow to chance, the more you can expect to be disappointed by lackluster yields. Attach the carbon scrubber to the inline fan so that the fan is pulling air through the scrubber you can use ducting or simply connect them if they are the same size. 
My goal is for 420ExpertGuide to be a one stop shop for indoor growers to find the information they need. Its up to you. Im going to lay out everything you need to know about selecting an inline fan for your grow tent, and getting it set up properly. The clip fits securely on grow tent support poles. Ventilating your grow roomis way too important. Its not about completely eliminating them, but more so minimizing & masking them. Youre going to need to have direct airflow going through the lights reflector. But, as we saw above, you can also attach a silencer which will dampen your fans sound. Do all carbon filters come with pre-filter wrap for the exterior of the canister? You should be replacing the air in your grow space at least every 5 minutes when the lights are on, and even quicker if your environment is struggling to combat heat or humidity. We will do this with aluminum ducting. So if your grow tent has an intake hole thats about the same size as your exhaust hole, your tent will lend itself well to an active intake system. You can try leaving your carbon filter running 24/7, but this can mess with the environment and suck all the moisture from the room. And either connect the fans exit port directly to the exhaust hole, or by ducting it if you find it more comfortable. Finally, take the incense stick to the outside of the tent, and place it close to the intake hole. When your ventilation components and tent are physically in front of you, setup and configuration makes sense, so dont worry. JavaScript seems to be disabled in your browser. We carry a wide selection of dehumidifiers, ranging from small portable grow tent units to commercial grade units. The inline fan removes and replaces the air in your grow tent, but doesnt really circulate it well. Most commercial tents take measures to ensure a good enough seal. Without a properexhaust you may find yourself with a damp grow space where mold and fungi will start to develop. Get this right and the only place where youll be able to smell cannabis is when youre actually inside your grow tent. Let me give you an example calculation for a 4x4 grow tent, which is a pretty common size among indoor growers: Most 4x4 tents measure 48in x 48 in x 80 in. Check out my full article about lowering grow tent temperatures. The canister diameter on a 4 inch carbon filter would be more or less 6 inches. I recommend a fan with adjustable speed settings like the AC Infinity S or T Series so you can adjust the CFM to your specific requirement. Then you need to make a few additional considerations, such as 25% fan power reduction if you add a carbon filter, and 30% power reduction for each 90 degree bend in your ducting. So worry about getting the proper CFM rating. Inline and oscillating fans serve different purposes in the grow tent, so you should consider using both if possible. Thats the CFM rating youll learn about below. New Growers Start Here Complete Supplies List! Also, try and keep your path as short and straight as possible until the air is outside the tent. : That means you need to exchange 108 cubic feet of air per minute in order to properly ventilate your 128ft3grow tent. Passive or Active Air Flow For Your Grow Tent? Attach the hangers along the support bars of your grow tent ceiling. Cannabis plants can only thrive in certain climate conditions. (On top of that, a sealed tent helps keeping ambient light out during plants dark hours). Add ~2 inches to the outlet size. Step 2. GET EXCLUSIVE MARIJUANA GROWING TIPS & GUIDES. Alternatively, an active intake system uses a fan to actively draw air into your grow tent.