Marijuana Grow Room Air Filtration Systems Designed to eliminate odors and exhaust old air out and bring in new fresh clean air. Charcoal Can Fan Filters are the most common on the market today. I personally use Can-Fan Filters and Fans in all of my Grow Rooms. They have been proven to work year after year!
In-Line Air Filtration Fans
In-line fans or squirrel cage fans are used to move the air through ducts, into a filter to be scrubbed, then an exhaust fan removes the air. This is necessary for marijuana to grow as it needs fresh clean air, as well it will lower the chances of you getting caught due to strong smell and odors.
Can Fan Air Filtration Filters

Can-Fan brand carbon filters “The Original Can Fan” are the best at removing marijuana plant odors and keeping the air fresh and clean. Charcoal carbon can fan filters come in many sizes depending on the size of your grow room.
Carbon Air Filtration is the best way to get rid of marijuana plant smells and odors.
I am a little confused about the whole air in and air out concept along with the can filter and the cooling of the lights.
I have fresh air coming into the grow and flower room with one can fan. I have a mushroom foam air filter on the can fan input fresh air.
Right now I have a 400w hps light over 8 plants in the flower room.
I have a large can filter with a can fan on top sucking air from the room through the filter and out through ducts and through the HPS light and exausting to the outside.
Is this the right way to do it?