Answer there are three things that running an exhaust fan accomplishes when it exchanges the air inside your grow room with fresh air.
Grow room intake ideas.
Before you dive in you should have a sense of how many plants you hope to grow and what sort of growing style you intend to utilize.
Active intake systems actively draw air into your grow room with a fan.
In the veg tent you can have two mother plants you constantly strip clones from more information on cloning here 2 propagation trays for early life and 9 12 young plants.
Covering everything from various venting and exhaust systems for different accessories to how to calculate cfm for exhaust fans.
Second it lowers the humidity.
In this type of set up the fans work together to evacuate air within the grow space and replenish it with fresh air.
Just make sure to use devices that are strong enough for your grow room.
A thousand dollar grow room is ineffective without the right dna put into it.
The simplest way to move air within your grow room is to install portable fans intake fans and exhaust fans.
The first step in prepping your grow room is to find the right space.
Every grow room absolutely needs to be lightproof.
All that this means is that you have one fan blowing air out and another blowing air in.
I have a very in depth guide about grow tent ventilation.
How to tell a quality inline grow room fan from a cheap knockoff.
This is an important aspect of your grow room or tent because it helps your plants get the fresh air they need.
The guide drugs and bad ideas just posted.
When stale air gets pulled out of your tent room incoming air needs to be introduced.
Using motorized fans for both the intake and the exhaust is common in medium sized grow rooms.
This is because while the number of hours of light is quite important equally important are the hours of darkness.
However like we mentioned before you can use pretty much any extractor fan as an intake fan too.
If you re growing weed in a tent or grow room you need to constantly exhaust air to replenish carbon dioxide and remove excess heat and humidity unless you re using a completely sealed room in which you provide air conditioning and supplemental co2.
The size of the intake hole doesn t matter as much in this system so if your intake hole is the same size as your out take hole then you might want to consider using an active intake.
Third the fresh air coming into the grow box carries with it a fresh supply of co2 which the plants need constantly to keep growing.
These are just a few of the usual intake fans used in grow rooms with just a few lights and in classic 1 2 1 2m grow tents.
Greg green author of the cannabis grow bible greencandypress.
If you re working in a large grow room with 10.
