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When building out your grow room, it’s easy to overlook crucial aspects. After endlessly researching grow tents, lighting, and strains, you might think you have all your bases covered. Think again. When grown indoors, cannabis plants require light, water, and air.
That’s right, you can’t forget the critical role of air exchange in the grow room, and that’s why we’ve reviewed some of the quietest and very best inline fans for the job.
Variable settings allow for efficient power consumption
Incredibly quiet even on the highest setting
Ideal strength for a mid-size room
Assembly is required when mounting
Made from high-quality German material
Large and sturdy mounting bracket
Due to high efficiency, lower fan speed achieve high-output
The housing for the motor leaks small amounts of air
Abundant power for a sub-400 CFM inline fan
Extremely convenient 9-speed digital controller
Lightweight plastic housing
Incredibly loud, not ideal for being discreet
The clamps that are included are not high-quality
Comes equipped with three speeds
Doesn’t hum regardless of the setting
Far too powerful for small spaces
Requires an additional fan-speed controller in smaller rooms
Efficient blade design blows massive amounts of air
Made of high-end materials
The packaging used when shipping isn’t very protective
Heavy-duty inline fan, built to last
Super smooth bearings result in effortless ventilation
Saves money with a reliable speed controller
Heavier than comparable 6” model
Significant CFM coverage at low energy levels
Runs optimally for any duration of time
Some of the screws are easy to over tighten
Conveniently comes equipped with a variable fan speed controller
Surprisingly quiet at higher speeds
The fan speed controller is poor quality
The fuse for the motor isn’t reliable
Incredibly built and long lasting
High CFM rating for a 4” model
Small enough to be attached with a carbon filter on the ceiling
The clamps that come with the inline fan are poor quality
Not as a quiet as advertised
Highly efficient airflow
Cheap mounting brackets are prone to breaking
Louder than competing 6” models
As with anything related to growing cannabis, there’s a lot to consider before making any substantial purchases. Knowing beforehand your exact needs will always make your decision that much easier. In the case of inline fans, they play multiple roles within the grow room, and it’s best to understand how you’ll utilize them first.
As always, size does matter, but only in the sense of how much air will be needed in the grow room. A 10’x10’ grow tent will need a much larger inline fan compared to a 2’x2’ closet space. So, you’ll first need to measure your grow space.
After measuring your grow room, it’s important to visualize where everything will be once the room is up and running with plants. Every inch of the room needs to be accounted for because it’ll be a disappointment to buy an expensive inline fan that won’t fit.
By visualizing your grow room, you’ll be able to decide if you’ll hang the inline fan outside the room, in the room and on the floor, or in the room and attached to the ceiling. Generally, these are your only three options.
Inline fans come in a broad range of sizes, from 4” to industrial-grade 18”. Such a wide variety of sizes presents growers with many options. Some may decide to size-up to allow for a smoother transition into a larger room or some may size-down because their grow space won’t let anything more substantial. This is why it’s crucial to measure and visualize the grow room so you can purchase an appropriately sized inline fan.
Another essential aspect to consider when buying an inline fan for your grow room is its power rating. This is typically presented in CFM (cubic feet per minute). A simple way to determine how much power is required is by quickly measuring the height, width, and length of the grow room.
Next, multiply these three numbers to determine the total cubic feet of the room. As a rule of thumb, growers have established that 3-minutes is the maximum amount of time that it should take for your inline fan to exhaust all the air in the room. Therefore, divide the total cubic feet by 3. This should give you a basic estimate of your CFM requirement.
Your CFM requirement will increase as you add additional items to your inline fans, such as ducting, carbon filters, and the heat from grow lights. Once again, it’s important to understand the CFM requirements before you begin your grow operation because it’ll be a disaster if you realize your inline fan is too weak to exhaust hot air efficiently.
This is usually the most significant factor to consider when buying an inline fan. Unless you’re lucky enough to live in your own house with no one to complain about noise, then you’ll require the quietest inline fan.
You might not think it’s all that important, but once you’re standing next to a 12” inline fan on full power, you’ll reconsider. Although cannabis is legal in many states, most growers don’t wish to advertise their business. There are many reasons why growers want to keep their hobby discreet: professional ambitions, family matters, courtesy to others, or just plain privacy.
Luckily, the vast majority of inline fans are incredibly quiet compared to those on the market 5 years ago. Still, it’s important to shop around for the quietest inline fan on the market. Some inline fan manufacturers go so far as to encase their fans in special housing to decrease their decibel output. Your overall environment will dictate how far you’ll need to go to keep your inline fan silent.
Grow rooms require a high amount of light. This light comes at a cost: heat. The thousands of watts that you throw at your cannabis plants eventually catch up with your grow space by increasing the temperature drastically. A hot grow room means a slow death for your cannabis crop.
The best Inline fans act as regulators by exhausting this hot air from the grow room. They counteract the heat by bringing in cooler air from another source. This is why it’s essential to determine your power requirements beforehand, so your inline fan can quickly exhaust your grow space before any heat can adversely affect your plants.
Growers commonly use high-intensity discharge (HID) lighting. This type of illumination encompasses both HPS (high-pressure sodium) and MH (metal halide) and ranges from 300-watts to 1,000-watts each. Your choice of lighting will directly impact the power requirements of the inline fan.
Inline fans cool grow spaces down by not only pulling in cooler air from another source, but also by venting the heat through ducting that’s attached to the lights.
Usually, HID bulbs are placed within hoods that boost the light output with reflectors. These hoods are generally semi-sealed, with a glass panel directly below the lamp. Built-in flanges on the sides allow for an airtight connection to ducting. The ducting is routed outside, or to another room. Whether your inline fan is pushing or pulling the hot air out, it’ll effectively keep the temperature at a reasonable level.
Mold and fungi are every grower’s worst nightmare. Mold is too difficult to spot until it’s too late, and fungus is capable of wiping out your entire stable within weeks. Humidity is the primary cause of mold and fungi outbreaks, and the best inline fans are the first line of defense when battling a humid room.
First, you’ll need to determine what season you’ll be growing in. Second, you’ll need to understand if the region you live in is prone to high humidity. The information gleaned from these two factors will give you a great idea of which inline fan is right for you.
When grow rooms aren’t vented properly, the air becomes stagnant and moist. As time increases, so does the possibility of issues such as powdery mildew. The constant burst of fresh air that circulates through the grow room lowers the overall humidity, thus lessening your chances for contracting a devastating plant disease.
The aroma of cannabis is variable, but everyone can agree that it’s very noticeable. You’ll be hard-pressed to convince someone that you keep a skunk in your house, so you’ll need a method to scrub the smell. Carbon filters do precisely that, and they come in a wide range of sizes depending on how many plants you’re growing.
Inline fans work in conjunction with carbon filters because they are usually mounted on them. When viewing pictures of grow rooms, you’ll always see a carbon filter attached to an inline fan, or vice versa. This is because a carbon filter needs an inline fan to pull or push the tainted air through the carbon particles.
As you can see, inline fans along with carbon filters and dehumidifiers play an integral role in maintaining the ideal environment in your grow room. Buying the quietest inline fan will allow you peace of mind while ensuring that your plants stay happy with fresh, cool air. If it weren’t for the inline fan, you’d spend a fortune on air conditioning costs, thus rendering cannabis growing completely inefficient.
The inline fan’s job is a difficult one. It pulls air from one source and pushes it out to another. In between, it needs to efficiently push air through the carbon filter, ducting, and lighting. This is why you can’t overlook your inline fan choices. Inline fans can make or break your cannabis crop, so it’s critical that you understand your grow room set-up.
After searching through a vast amount of inline fans, we found that the Can fan RS 6” high-output model outdid its competitors in every regard. This fan is capable of pushing out speeds that are comparable to 10” models of other brands. It’s uncommon to find an inline fan that’s incredibly powerful, well-built, and overall quiet. The Can fan RS 6” high-output model fits the bill in every respect.
As you already know, inline fans play multiple roles in regulating your grow environment. From heat, humidity and air exchange, inline fans are the necessary piece of equipment that’s needed in every grow room.