4 CFM Air Compressor – Everything You Need To Know

4 CFM Air Compressor

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4 CFM air compressors tank be different sizes. It would be 4 gallons, 6 gallons, or 12 gallons or any size. 4 CFM at 90 PSI; these air compressors are typically designed for air-hungry nail guns, occasional painting jobs, and large tires inflating.  

What does it mean 4 CFM at 90 PSI?

4 CFM at 90 PSI means the compressor pump can continuously deliver four cubic feet of air per minute while keeping the tank pressure at 90 PSI. 

Note: As the tank pressure increases, the airflow capacity of the compressor will decrease. And larger the tank size, the more air you can store. 

Which 4 CFM air compressor will suit your job better? 

Here, we reviewed the top three 4CFM air compressors.


6-gallon air compressor with 4CFM capacity at 90PSI

6-gallon 4CFM air compressor

Are you looking for an air compressor to run framing, roofing, and other air-hungry nail guns? The Metabo HPT 6-gallon model with 4CFM at 90PSI rated air compressor will suit better than the competitors. 

Typically 6-gallon pancake air compressors have inadequate airflow capacity, which does not match the requirements of framing and roofing nailers. Those have an airflow capacity maximum of 2.6 CFM at 90PSI, take a lot of time to fill the tank, recovery time is longer, and drops the pressure after firing a few nails. We have noticed none of these issues on the Metabo HPT 6-gallon 4CFM compressor.  

Why did we recommend this 4CFM Metabo air compressor? 

  • It has 4 cubic feet per minute airflow capacity at 90PSi. That’s 30% more than the competitors
  • 200 PSI maximum tank pressure, which is 1.34X More than the typical 6-gallon pancake compressor
  • All bearing and moving parts of this compressor are sealed and pre-lubed, so it does not require periodic maintenance
  • The carrying handle of this compressor is made of metal, which suits better in busiest job sites
  • You can run two framing nailers, two roofing nailers, three finish nailers, or five brad nailers simultaneously. 

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What Size Air Compressor For Nail Gun?


Husky 20-gallon 4CFM air compressor

husky 20-gallon 4CFM air compressor

If a larger air compressor is needed for your home garage, Wheres it would be used to run nail guns, paint sprayers, air-blow guns, small demanding impact wrenches, grease guns, and air ratchet wrenches. The 20-gallon husky silent air compressor deserves your attention for its 4CFM airflow at 90 PSI and quick recovery time. 

Here’s why the husky 20-gallon air compressor is better for the home garage. 

  • It’s quiet, with a noise level of less than 75DBA, so you can continue the normal conversation while it runs. 
  • It has a larger storage tank that is capable of storing more air. 
  • It offers Two quick couplers to use two tools simultaneously.
  • The maximum tank pressure is 165 PSI, which allows for running medium air-hungry auto repair tools.
  • The compressor pump is oil-free and requires lower maintenance.

What kind of tools can you run with this 4CFM 20-gallon compressor?

  • You may run all nail guns with the most air-hungry framing and roofing nailers. 
  • According to its larger storing capacity and higher tank pressure, a 3/4 impact wrench could be run for a while. Also, usable for a 1/2-inch impact gun in moderate use. 
  • HVLP paint sprayers require a high air volume at a lower pressure so that these paint sprayers can run at maximum power. 
  • For its lower air flowing capacity, DA sanders, pneumatic angle grinders, and hammers unable to run at maximum power

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What Size Air Compressor For Painting

What is a 4CFM air compressor good for?

As I mentioned at the top of the content, the 4CFM compressor’s tank size could be 6-gallon, 12-gallon, or 20-gallon. 

One of the first things you need to decide is what type of work would be done with a 4CFM air compressor. A portable 6-gallon compressor with a 4CFM airflow capacity at 90 PSI is enough to run any nail gun. 

If you plan to use a 4CFM air compressor in your home garage to run medium air-hungry auto repair tools and paint spray guns, then the husky 20-gallon is plenty enough. 

Can you run an impact wrench with a 4CFM compressor?

Most 1/2 inch impact wrench requires continuously 5-10 cubic feet of air at 90 PSI. In that case, a 4CFM compressor is inadequate to run a 1/2-inch impact wrench. But there is a chance that if the compressor tank size and pressure handling capacity are larger, it might be usable for tightening and loosening a couple of nuts at a time.

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