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Best Crypto Mining fans for 2021

    What is a Cryptocurrency Mining Rig?

    The best bitcoin mining fans

    Simply put, a cryptocurrency mining rig is a computer system used for mining cryptocurrency, such as Bitcoin. The ‘rig’ is, simply put, a customized PC which may either be solely dedicated to mining or it might also be a computer that doubles as a gaming/rendering system and is used to mine part-time. In most cases, a lot of people dedicate these rigs specifically to mining cryptocurrency.

    It has similar elements to that of a PC (CPU, RAM, motherboard, and storage). The difference between a cryptocurrency mining rig and a regular PC is that a crypto rig has graphic cards or GPUs. These are the main processing unit used in mining cryptocurrency, and thus require a lot of power. Typically, Bitcoin miners have two or more GPUs to maximize their rig’s mining capabilities.

    There used to be a time when Bitcoin miners could operate out of a laptop or their existing gaming rigs and still make a decent profit, but now that it has become more difficult to mine Bitcoin, more and more crypto miners are creating dedicated rigs solely for mining.

    Bitcoin mining these days requires more calculative power, as Bitcoin difficulty continues to increase over time. Therefore, it requires hardware that is much more powerful, not to mention more expensive - as well as a considerable amount of electricity.

    Back in 2009, it was Bitcoin inventor Satoshi Nakamoto who mined the genesis block of Bitcoin, which had a reward of 50 bitcoins. Many years later, Bitcoin is now one of the most well-known cryptocurrencies. Other common types are Bitcoin Cash, Litecoin, Ethereum, Ripple, Stellar, NEO, Cardano, and IOTA. It has been around for over a decade now and has only continued to increase in value over the past few years. As such, destinations such as Iceland have become even more popular among Bitcoin miners because of their cold weather, high-speed internet, and very low cost of electricity.

    In terms of building a mining rig, here are some things to keep in mind:

    • Cost - Mining can be expensive. GPUs alone can cost up to $1000 because they are in limited supply due to high demand from crypto miners, and the ongoing 2021 semiconductor shortage.
    • Power consumption - You need to be wise with your power consumption, which is why a lot of Bitcoin miners do not use A/C systems, as power consumption could reduce your earnings.
    • Custom build - Building a crypto mining rig may require a lot of patience and trial-and-error since you’re not going to be building a regular PC. You have to pay a lot of attention to the technical specifications of both your mining equipment and your cooling system.

    Why Do You Need a Fan for Crypto/Bitcoin Mining?

    Cooling fans are an essential part of any cryptocurrency mining rig. Generally, any equipment that consumes a lot of power is bound to heat up quickly. Mining through GPUs can require very high power consumption, and therefore they can run very hot pretty quickly.

    To avoid risking damage to expensive equipment, you’re going to need to find high-quality cooling fans to eliminate all the unwanted heat generated by your Bitcoin miners.

    Bitcoin miners typically exhaust around 200 CFM (cubic feet per minute - more on this later). Your main priority in this scenario is getting rid of the heat generated by your miners quickly and efficiently. Using a system of fans is preferable to air conditioning, if not more advisable because fans are more energy-efficient and cost-effective. This way, you won’t spend your earnings from mining on just paying off your electricity bill.

    In choosing the best fans for your rig, you need to consider a few things:

    • Heat levels incurred by your processor Room size Airflow Ambient air temperature
    • Room size
    • Airflow
    • Ambient air temperature

    If you’re into Bitcoin mining, chances are high that you want to maximize your profits and cut losses. You might be thinking, ‘Do I really need to spend extra money buying fans?’ The answer is yes, especially if you are setting your sights on creating a full mining facility with multiple machines. In fact, you should consider purchasing high-quality fans as an investment and an integral part of your mining rig’s health.

    Damage That Your Rig Can Incur From Not Using a Quality Fan

    Depending on the kind of GPU you have, temperatures may run hotter than others. As a general rule of thumb, you don’t want your equipment to go above 176℉.

    Some miners even recommend keeping it lower than 149℉. Anything above the maximum recommended operating temperature could cause major problems. On that note, remember to get a thermometer for the room you keep your mining rig in, so you can monitor temperatures regularly.

    So what can happen to your rig if you decide to not use a quality fan?

    Above the maximum recommended temperature, a GPU could start producing smoke due to too much heat. Surrounding plastic materials can also melt at high temperatures. The hotter units get, the less efficient and damage-prone they get. In this case, you’re obviously not going to be able to optimize mining - so better keep things cool before running into any unwanted (and very costly) damage.

    If in any case, your GPU runs too hot due to an improper set-up, let’s say 196℉ and above - cool it down immediately by decommissioning it for a while until you are able to prepare adequate cooling and ventilation. Honestly, since miners cost thousands of dollars, it’s only wise to ensure your investment is well-protected.

    Getting Started: Planning Out Your Rig Airflow

    Determine the Airflow Pattern

    The standard means of removing excess heat is through either the use of wall exhaust fans and/or roof exhaust fans. Another way is by pressurizing the space and allowing heat to escape through louvers or motorized shutters.

    To optimize your airflow, you have to consider the size of the room or space, and the number of mining equipment inside. You’ll then need to calculate the CFM (cubic feet per minute), which is a measure of airflow, to find the best fan that will match your needs. Typically, larger rooms with more bitcoin miners require more CFM.

    The standard means of removing excess heat is through either the use of wall exhaust fans and/or roof exhaust fans. Another way is by pressurizing the space and allowing heat to escape through louvers or motorized shutters.

    To optimize your airflow, you have to consider the size of the room or space, and the number of mining equipment present. You’ll then need to calculate the CFM (cubic feet per minute), which is a measure of airflow, to find the best fan that will match your needs. Typically, larger rooms with more bitcoin miners require more CFM.

    Some GPUs such as reference graphics cards have single-fan, blower-style coolers to push the hot air generated by the GPU through the card’s heatsinks and then outside of your case. These reference cards are usually from Nvidia or AMD, but you can also find third-party cards. Blower-style designs are great for small spaces with limited airflow because they expel heat out of your case instead of dumping it into your case, thus preventing overheating.

    Depending on your room layout, you’ll want to plan for your rig airflow in such a way that allows for plenty of cool air to travel through the front intake of your rig and across your components without any obstructions. This will allow airflow to travel over components that may run hot. Ideally, try to avoid having any areas within your case that are unreachable by fans, as these may trap heat.

    Most Bitcoin miners set up their fans in such a way that one is facing the case, blowing cool air, and another towards the back facing away from the rig, blowing out any hot air away from the case.

    Calculate the Amount of Energy Consumed By Your Rig

    You can calculate the amount of energy consumed by your rig to prepare for future costs and if you want to project whether your current mining setup will be profitable at the end of each month.

    There are two ways to measure your rig’s energy consumption:

    • By measuring energy consumption with a wattmeter;
    • By measuring energy consumption with software

    Measuring electricity consumption with a wattmeter

    A wattmeter is a device that you plug into an electrical outlet, with your PSU power cord plugged into it. The device will then display the amount of electricity consumed, which you can either view in watts or amperes.

    Using a wattmeter is the most accurate way to measure your rig’s power consumption. You can easily purchase a wattmeter from Amazon or Home Depot.

    Measuring electricity consumption with software

    You can also install software that displays power consumption, such as the TechPowerUp GPU-Z. It’s free, although it can only measure GPU power draw and not that of your entire setup - fans included.

    To measure power consumption with GPU-Z:

    • Install and run the software
    • Navigate to ‘Sensors’
    • Locate ‘GPU Chip Power Draw’
    • From here, you can see the current power consumption

    After you’ve calculated your energy consumption, you can then proceed to make an informed decision on what cooling system you want to acquire based on your budget.

    Calculate the CFM for your crypto mining rig

    Calculate the CFM (Cubic Feet/Minute) of your airflow solution CFM stands for ‘cubic feet per minute,’ and is the volume of air moved per cubic feet, per minute. Calculating the CFM of your airflow solution is important because the fan of your choice should have a CFM rating that is high enough to replace the air in a certain space at a rate of eight times per hour. As a general rule, you want 1 CFM per square foot of room.

    Best Industrial Fans has a detailed guide and CFM Calculator which you can use to help you pick a great fan for any space or application. The calculator was built specifically to guide consumers in choosing the best fans for any space, so you can adjust the room height, area, and type of room. Based on the resulting CFM, you’ll get a list of recommended units to choose from, which you can easily check out via Amazon.

    Another important thing to consider when calculating your required CFM is the ACH, or air changes per hour. ACH depends on the size and type of room.

    For an accurate sizing of your fan, you can use the fan sizing calculator of your fan. The guide there shows us that spaces that are larger and typically hotter usually require higher ACH (computer room, copy room, smoking area, commercial kitchen). Using this rough guide, we can assume that for a mining room, depending on the size, you should aim for an ACH of 10-18.

    Factors to Consider While Choosing the Best Fans

    So, aside from CFM, what other factors should you consider to find the best fan for your crypto mining rig? Ideally, you have to choose one that’s also slim enough to fit between your GPUs (or generally in and around the room), to cool them more effectively. Here are a few other considerations to help guide you in choosing your fans:


    There are a lot of commercial fans available out there, but in order to maximize your profits from Bitcoin mining, you’ll have to consider your budget. To find the most cost-effective option for your setup, you should ideally decide early on if you want just a couple of large fans and exhausts, or if you want to dedicate box fans dedicated to your GPUs. You can check out your options for industrial floor fans, exhaust fans, and ceiling fans at Best Industrial Fans.

    Energy efficiency

    Choosing energy-efficient equipment is critical in building your mining facility. Since you are going to have a lot of energy-consuming components inside your facility, you should choose hardware that has as little energy consumption as possible for your requirement. Considering how much cryptocurrency each of your miners makes on a daily or monthly basis, you’ll have to crunch a few numbers to find your sweet spot in terms of energy consumption and upkeep for the rest of your equipment in your mining room. This is important to know so that your electrical bill does not cut too much into your profits. Using energy-efficient equipment will reduce your overall operating expenses so that you make a bigger profit.

    Should be Quiet and Powerful

    Your ideal fan should be both quiet and powerful to avoid creating too much noise within your mining room. Especially since you’ll likely be adding more GPUs as you go along, you don’t want to pick a fan that would add more and more noise as you increase your operation.

    Ideal for High Static Pressure Applications

    You should ensure that the fan you choose is ideal for high static pressure applications, such as the environment that your GPUs will produce. Typically high-pressure static fans are used on radiators, CPUs, hard drives, GPUs, and other places where airflow might be impeded by an object. Their high-pressure capability makes up for this so they are able to overcome any airflow restrictions caused by the blockages.

    Vibration free

    You wouldn’t want a fan that vibrates or moves a lot because this could compromise the performance of your mining equipment. You want your cooling setup to be generally vibration-free so that the fans don’t shake the machines. Otherwise, you may incur damage from cards coming loose resulting in reduced mining efficiency.

    Idea for long term runs

    You also want to ensure that your cooling equipment is capable of long term runs since you’ll be running them 24 hours a day. Ideally, you only turn off your fans when you turn off your GPUs, so that they don’t heat up. However, turning off your GPUs is not really ideal because anytime your GPUs are off, your mining operation is also halted, so you’re not making money. Most miners who run high-profit operations run their equipment 24/7.


    You may also want to choose a fan that requires little to no maintenance so that you don’t need to worry about constant upkeep. Again, turning off your equipment is not ideal, therefore you should choose one that has an external rotor motor with a built-in thermal overload for protection.

    On this note, you might also want to explore having an exhaust fan with a CFM of 4000 or more, especially if you have a large mining facility. If you have a powerful exhaust you may no longer need to place individual fans in your location. This would also help in the eventuality of your GPUs smoking or catching fire, as the powerful exhaust can immediately clear the room. The CE30-DV Venturi Mounted Direct Drive Wall Exhaust Fan is a good example of this type of high CFM fan.

    Final Thoughts

    A cryptocurrency mining facility requires a smooth operation to ensure that your Bitcoin mining remains uninterrupted and is producing as much profit as possible. To ensure this, you’ll need to purchase high-quality hardware, especially for your cooling system.

    We’ve outlined the basic characteristics of a good fan above. As much as possible, try to find a fan that meets all those qualifications and is appropriate for your area and ceiling height.

    Remember that utilizing high-quality fans will make it much easier for you to maintain a low temperature for your mining facility, thus protecting your GPUs. Depending on your space and budget, you have a wide range of choices of fans to choose from. The most important thing to keep in mind is the CFM, which you’ll want to match or even exceed, to ensure that your mining facility is operating at its optimal state.

    Ventilation is also very important, as sufficient ventilation will efficiently exhaust the heat that continuously rises from your equipment. Make sure to also factor this in by calculating the amount of heat generated by each piece of equipment. Your ultimate goal is to keep your miners running at a low temperature where they can operate at full efficiency at all times.