Air Exchange


Air exchange in a grow room helps keep the temperature down and regulates Co2 levels. A high powered fan blowing outside will cause an opposing vent across the room to suck in air.

air exchange,exhaust fan But how do you know the power of fan to get and just how do you know when the room has had a complete air exchange?

Fortunately there is a formula to determine this. First we need to find the CFM or 'cubic feet per minute' of the grow room.

Determine this by multiplying the length of the room times the width times the height.

This calculates the CFM to exchange air in the grow room within 5 minutes since air should be exchanged at least every 5 minutes and more preferably every minute.

Take the 5 minute CFM and divide by 5 for the 1 minute CFM. Example: Room is 10 by 10 and 7 feet in height which is a CFM of 10x10x7=700

So a fan rates at 700 CFM will exchange the air in the room every 5 minutes. Divide 700 by 5 = 140 CFM to circulate the air every minute.


If you like this website, consider downloading this free toolbar for your browser.

Previously I featured a conduit toolbar with radio for download but replaced it with the Alexa toolbar featuring website anaysis tools along with real-time related links to facilitate searching. Alexa is owned by Amazon and will not embed spyware into their toolbar. It's safe and it's free!


Site Search

Automatically Translate this Webpage

[?] Subscribe To
This Site

Add to Google
Add to My Yahoo!
Add to My MSN
Add to Newsgator
Subscribe with Bloglines

Bookmark and Share

| Top of Air Exchange page | Grow Room |
| Homepage | Contact Us | Policies | About Us | Privacy Policy | Advertise |
Copyright© 2006-2012 All Rights Reserved.