Required Air Exchange

Use this calculator to determine the minimum air exchange required in cubic feed per minute (CFM).
This calculation might be different at each stage of growth.

How long is the grow room?

How wide is the grow room?

How tall is the grow room?

Volume of grow room:

cu ft

How many air-cooled HID lights are you using?

How many HID lights are you using that are not air-cooled?

Is the room enriched with CO2?

Will you use a carbon filter with your exhaust system?

Is the average temperature outside your grow room greater than 75degF?

Is the average RH outside your grow room greater than 70%?

Total minimum air exchange required:

CFM