A good ventilation system can be crucial to keeping your cannabis plants happy and healthy. In its most basic form, an open window can act as a ventilation system. With most grow rooms though, they need more fresh air than an open window can provide. Grow Daddy provides all of the tools that you need to build a custom ventilation system:Active Venting: Almost all grow tents include a ventilation hole near the top to catch hot air that rises. The vent should be equipped with a fan to push air out, which is why it is "called active" venting. You can remove odors from the air by connecting your fan to a carbon filter. Ducting: Ducting is simply used to direct incoming or outgoing air through the appropriate vents. Passive Intake: Almost all grow tents include a passive intake vent near the bottom of the grow tent, along with screen to keep dust out. As air is removed by the active venting, air will be drawn in from passive intake vents. Make sure that there are no holes in the roof or walls to prevent false intakes and ensure that all of the air entering the grow tent is coming from the passive intake vents. Some growers will use a fan to help control the amount of air that enters the room. Filters: Filters can be used to remove odors from the vented air, and passive intake vents feature a mesh cover that will keep out dust, but if you want to prevent pathogens such as mold from entering your grow room, you may want to take a look at a Hepa intake filter. It's a little pricier but will ensure that the air entering your grow room is clean. Inline Fans: Inline fans help to direct air into or out of a grow room. They create a powerful suction that cull pull air through the fan and into the direction you want to send it.  JUMP TO AIR QUALITY & ODOUR CONTROL