Measures airflow. Higher CFM is better for picking up fine dust and light debris.
The Ultimate Shop-Vac Buying Guide: How to Choose the Right Wet/Dry Vac shop vac buying guide
Used specifically for wet pickup to protect the motor from moisture. 5. Essential Features and Accessories Measures airflow
Good for large debris like wood chips or gravel. shop vac buying guide
Best for professional job sites or large renovation projects. Note that these can be heavy and difficult to maneuver when full of liquid. 2. Motor Performance: Horsepower and Airflow
Mandatory for drywall dust, cold ashes, or allergens.