Exactly What Size Air Filtration System for Shop Is Ideal?

What Size Air Filtration System for Shop

A workshop is a place where a lot of creativity happens. There’s the joy of making and breaking both involved in your little area. But there are also a few unpleasant stuffs, for example, sawdust and other tiny particles.

That for obvious reasons will be more in a workshop than any other place. And so, you need to take action for keeping the air clean. Because your health is a priority you cannot ignore for long. Adding an air filtration system is probably most effective and easy solution for the problem.

Now when you are into getting the suitable pick, it’s also essential to seriously ponder over what size air filtration system for shop should be the finest bet? Today let’s talk on that matter a bit in-depth.

Answering to What Size Air Filtration System for Shop Is Right.

Such questions don’t have a straight answer and the reason is there are a few factors that determine the whole thing. When you think about the proper air filtration size, you’ll also need to consider factors such as CFM and RPM rating. Clearly, without getting involved in these factors’ discussion, you cannot decide the proper size. So, I will surely include some factor chat and then tell you what the proper size should be like. Keep on Reading…

Size Based On CFM

The first thing you need to know is that shop air filtration system must clean air inside your workshop six to eight times each hour. And this means the entire volume of air inside that area needs to pass through the filtration system at least six times in one hour.

The area covering speed of an air filter system is measured with CFM unit. It means cubic feet per minute. And refers to how many cubic feet of the area the air filtration system can clean each minute. With more CFM, you get more filtering coverage.

Usually, for workshops and small garages, there’s no need to go more than 400 CFM. The information of CFM should be in product description segment.

The volume of air is measured through CFM and you need to match this with system’s CFM. To do so, you need to calculate the volume of your workshop. Basically, you need the height, width, and length of that area.

And then multiply all three to get a figure. Then multiply once again the figure with total number of times you want the air to be cleaned. Probably 6 to 8. Finally divide your achieved figure by 60.

For example, imagine your workshop comes with an 8 feet ceiling, while the other measurements are 25 x 15 feet. You’ll find the volume of that workshop to be 3000 cubic feet exactly. Now suppose you want the filtration system to work for 7 times each hour. So, you’ll multiple 3000 with 7 and get 21000. Now divide it by 60 to get 350 CFM. And this means the ideal size of your air filtration system should be something capable of 350 CFM.

Size Based on Motor.

For a small or medium-sized workshop, the size of an air filtration system also means the power of the motor it comes with. And so, this measurement is surely going to come into play. First of all, don’t go for anything less than 1/3 HP for a small size workshop. And if it’s a medium size shop, then a filtration system with 1/5 HP motor size should work best.

RPM is also an important factor that relates to the motor. It’s actually the short form to revolutions per minute. And this refers to the motor spinning blower fan or wheel speed. It works for sucking all the pollution out of air. And that’s why RPM is a huge factor you can’t miss for picking proper size filtration for your shop.

Go for air filtration systems that come with ranges of RPM. Usually, you get to choose from 1700, 1400, and 1200 RPM. You basically adjust the airflow speed according to your convenience.

Size Based on Dimension.

Air filters come of diverse diameter ranges and usually the huger it is better it’ll fit in bigger rooms. However, the shape can make things somewhat different. There are models that are quite wide but at the same time short too. Also, you’ll see options with a tall body that is thin too. Usually, the depth is somewhere between 10 to 20 inches.

The whole shape and size matter relates with CFM and RPM rating very deeply. That’s why you should be considering not just the actual dimension of a system but its other calculative figures.

However, for a small garage where space is less, you should route for something not too large. Or else where will you place it? And if the space inside is pretty huge, then go ahead and get a bigger one that can give better area coverage.

Essential Items You Need That Maximize the Filtration Process!

Sanding, cutting, grinding and a whole lot of other stuffs might go inside the workshop. And clearly only depending on the air filtration system won’t be enough. Even if it’s the perfectly matched size. You need to associate some good practices and a few items that can help to keep the air inside your workshop less polluted.

The first item is a Shop-vac. These are not meant for cleaning huge mess. But for tight and cornered areas of your workshop, it really helps. The suction is good enough for you to spend a few minutes giving workshop a manual cleaning after your day ends.

Another fabulous essential item is a dust collector. These are great in terms of functioning and portability. For larger chips, dust collectors have worked fantastically for many. However, the very tiny particles cannot be achieved by these, just keep that in mind.


The answer to what size air filtration system for shop is perfect can never be determined by one thing. You need to consider more than just a few factors to actually make an effort in choosing an ideal air filtration system. Working inside your workshop is something you might do very frequently.

So much that you basically live inside your shop. And having the air to breathe inside polluted is definitely an open invitation to lots of diseases. Don’t torture your lungs by sidestepping the thought of getting an air filtration system inside your shop. You need it more than anything else.

About Sam Maxi

Hi, this is Sam Maxi. I love talking about woodwork tools and my reviews are mostly based on the experience I have from my work. Apart from reviewing, I am a huge fan of surfing. Also, I love watching horror genre movies.

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