Fans are an incredibly important parts of growing cannabis indoors, as they help to distribute all of the fresh air coming in through your air filtration system, while stopping any pockets of stagnant air from forming. In this post we’re going to give you a simple rundown of why and how you should be using fans when growing cannabis indoors – indoor grow fans can make or break the entire process.

Why do you Need to Use Indoor Grow Fans?

Cannabis plants absorb all of the Co2 available around them within around one minute, which is why you’ll need to set up fans near your plants; they distribute any new air around the grow room so that all of your plants have access to a constant stream of Co2 and so that your plants aren’t affected by stagnant air, which can cause illnesses and humidity.

With just a little extra air flow, your plants will be able to breathe much better, improving photosynthesis, nutrient absorption and generally increasing your plants’ strength; the branches will grow stronger thanks to the slight wind resistance, which means that during the flowering period they’ll be able to grow thicker, heftier flowers. You can keep your fans on the whole time or you can have it on an intermittent scale, every 15 minutes for example. If you tend to grow in a humid area, we recommend keeping the fan, and vice versa if you live in a drier climate.

Using Indoor Grow Fans

Sometimes, fans can also harm your cannabis plants, so you need to keep a few things in mind before turning them on. You’ll need to set your fan strong enough to cause a slight rustle, but not too strong. If it’s too strong, your plants may bend too much and end up breaking or getting damaged. Plus, it also causes their substrate to dry out much faster, stressing your plants out and affecting their growth.

using indoor grow fans

During the flowering period if you set your fan too strong, you may end up damaging your plants’ flowers due to being in constant movement. This causes them to brush against each other; this can, in turn, cause a dramatic increase in the chance of fungi and bacteria infections.

Indoor Grow Fans Setup

You’ll need to get an adjustable fan with different speeds so that you can adjust it your space and needs. If you have it set up far away from your plants it’ll need to be set at a faster speed than if you have it right beside your plants; it should cause a very slight rustling in your plants’ leaves. Under no circumstances should the breeze be strong enough to bend their branches, or you may have some of the issues that we mentioned before. The best type of fan is the turning fan, which allows for balanced air distribution. If you have one big fan, we recommend replacing it with two smaller fans that can help to better distribute the air in and around your cannabis plants.

indoor grow fans setup

There are many different types of fans that you can use when growing indoors; there are small fans for grow tents, stand-alone fans for medium-sized grow rooms and wall-mounted fans for larger grows, as well as models that come with remote controls. If you’re not sure which to pick, keep reading for a brief overview of some of the models that we work with on GB The Green Brand.

Different Types of Fans for Indoor Grows

oscillating fanOscillating Clip-On Fan for Grow Tents

This fan is specifically designed to be used in grow tents. When you grow using a grow tent, there’s not really much space to place a larger fan in among your plants. This is why this type of fan is a great alternative; you can place it on any of the bars in your grow tent, including long the side of your reflector, pointed at your bulb in order to cool it down if necessary. It turns and has two different speeds – in order to optimize airflow, we recommend using two of these fans in your grow tent.

stand-alone fanOscillating Stand-Alone Fan

This type of fan is a lot more common in grow rooms with two or more lights; its spin makes it perfect for cannabis growing. It also has various different settings in which you can change the breeze direction and the height of the stand itself. It has three different speeds, allowing you optimal control over how far the breeze can reach, depending on where your plants are. We recommend placing it in the center of the room to one of the sides, near your air inlet if possible. If you have a large room you can use two fans, one on each side in order to produce an even flow.

Indoor Grow FansRemote Control Wall Fan

The remote control wall fan is one of the most practical and comfortable fans that you can use in your cannabis grow room for one simple reason; you can control it via a remote. Thanks to the remote, you can change the setting without even needing to go near it, which makes your job much easier and it can also reach areas where other types of fans simply can’t. However, you’ll need to make sure you set it up higher than how tall your plants are going to grow; if they grow directly into the path of the fan you may need to remove it and place it up higher. It has various different speeds, allowing you to adjust the intensity of the breeze.

In order to use this fan you will need to mounts it to the wall by making a couple of holes and attaching the necessary frame.

cieling fanMultiFan Turbo Ceiling Fan

This Wall and Ceiling Fan is perfect for targeting specific areas of your grow room, for lower areas or even for pointing upwards for certain growing systems. You can also hang it from your grow room’s ceiling, place it on the floor or incline it in any direction that’s needed. It’s also really silent, and it’s a great choice for grow tents and open grow rooms as it’s quite potent and doesn’t take up much space at all.

industrial fanIndustrial Floor Fan

These types of fans are similar to the previous type, although it’s made out of much stronger materials. It also comes in various different sizes, allowing you to choose one that best fits your growing needs. You can attach it to the ceiling or to one side of your grow tent. You can a simply leave it on the ground and point it where it’s needed. It has three different speeds, and it’s an incredibly sturdy device that’s perfect for large grow rooms.

As you can see, grow room fans are an absolute necessity when it comes to growing cannabis indoors; have a look at all of the different fan models that we stock on our GB The Green Brand store. You’ll definitely find the perfect model that’s just right for your growing conditions. Until next time!

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Erik Collado

With more than 10 years of background in the cannabis sector, his experience and knowledge are the base of GB The Green Brand’s success

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2 replies on “The Importance of Indoor Grow Fans”

It’s good to learn that you should place your industrial fan in the middle of a room. My wife and I are wanting to make a room cooler and we were wondering where we should place a fan in a big room. I’ll be sure to tell her that we should look for an industrial fan that fits the room size.

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