Hello Jessica, air scrubber has 11 ACH for a room with a specified volume. If you put it in a bigger room, the number of ACH will fall. If you have 6 ACH now, that means that, theoretically, all the air in the room is changed 6 timers per hour. ACH doesn’t really tell you anything about airborne particle removal. Essentially, the higher the number of ACH, the quicker the room should be cleared of these particles. But that also depends on what kind of filters the air scrubber uses, what kind of particles are we talking about, and so on.
Portable welding machines usually require quite a lot of power; 200 amps 110V machine will run on 22,000W. The peak wattage (start-up Lasko Box Fan wattage) will be about 25,000W-30,000W. So, you would need a generator that can provide 30,000 watts of power; 30kW generator.
Real power is a product of voltage and current; basically volts × amps . Hi Barbara, the best article for this would be this generator sizing article. In short, you need to know the start-up wattage and running wattage of your portable welding machine.
For everybody who needs CFM calculation for ductwork, you will also need the duct diameter to achieve that airflow. When sizing a bathroom fan, you need to take into account 8 ACH. You can check how many CFM for the bathroom exhaust fan you need here . In AC circuits, apparent power is often not equal to real power . The difference between apparent power and real power is the fundamental difference between kVA and kW.
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