Fans, Filters and how they relate to your garden.
Do you have enough airflow in your indoor garden?
Achieving the ideal environment in your indoor garden
There are many issues that can throw us a curve ball in the grow room. Environment is certainly one of the big ones. One of the big challenges faced when setting up a new space for gardening indoors, is getting the temperature and humidity correct so the plants can thrive and you can focus on the other important factors that will help to maximize your crops potential, like nutrients and super cropping.
Depending on your garden size, and the natural condition of your outside air, it's certainly possible that at some point, you will find yourself buying air conditioners and dehumidifiers. However, weather you end up needing these items or not, it is almost certain you will at the very least be buying fans for your grow room. Fans will help us with a few things. Wall mount fans like the Hurricane 16" are not only great for circulating your air and ensuring that every cubic foot of your room is similar. But they also provide something for your plant to resist, which will in turn strengthen overall stalk girth and density.
We know when it's too hot or too cold. We know when the humidity is wrong. But what can we do about it?
The ideal temperature and humidity in your grow room
We know that most plants tend to thrive in 75F and 60% Humidity.
What's the best policy for ensuring we have the best air quality in our room? Lets first start off with the idea that the air quality outside is already perfect. In that case, all we need to do is add exhaust fans. So for the sake of example, lets make a pretend room. Our fake room will be 10'x10'x8'. Next we want an idea of how many times we want to cycle the rooms air. Here's the calculation for that.
CFM- How to calculate
- Calculate the total cubic feet of the room. In this case 10x10x8 = 800.
- Standard cycle timing is one time per minute to every 3 minutes. So if we want once every minute, we will need a fan that is at the very least able to push 800 CFM. This Can Pro 8" would do nicely. If we want less flow, divide by the minutes. 2 minutes would be 800/2 = 400. 3 minutes would be 800/3=270.
- If you are adding a carbon filter, that will cut down the CFM Value of the fan. Typically this reduction is about 40% or less. You may wish to factor this in when determining fan size.
Note: Most carbon filters have a CFM Posted for their scrubbing speeds. Not their exhaust speeds. If you want to calculate for exhaust a good rule of thumb, is to cut the posted CFM speed in half.