I've been planning a 3' x 2'-6" x 6' stealth grow cabinet for a long time now, but I have some questions before I get started.

At first i was considering a 400w HPS light with batwing reflector. Seeing how my growspace is so small, I'm worried about heat. Assume temperatures around 75 degrees outside the cabinet.

Is it possible to use the 400w HPS lamp with enough ventilation?
If it is possible to use the HPS, what CFM fan will be adequate?
Is a 125 CFM computer fan enough?

Keep in mind this is a stealth cabinet, I can't have an in-line fan pumping air as loud as a muffler.

How can I keep powdery mildew from forming inside the cabinet?
Are there sulfur burners small enough to be used in the cabinet?

What can I do to reduce smell with limited space?
Maybe a small bucket with odor neutralizing solution and a fan on the top of the bucket (pointing air into the solution), or perhaps a small carbon filter?

If possible I want to add CO2 into the cabinet.
Whats the most efficient way to produce CO2 in such a sized cabinet?
Maybe a homemade solution like a bowl of yeast?

Sorry for so many questions, but I couldn't find anything through search.
Kine Bud Kyle Reviewed by Kine Bud Kyle on . Questions for a cabinet I've been planning a 3' x 2'-6" x 6' stealth grow cabinet for a long time now, but I have some questions before I get started. At first i was considering a 400w HPS light with batwing reflector. Seeing how my growspace is so small, I'm worried about heat. Assume temperatures around 75 degrees outside the cabinet. Is it possible to use the 400w HPS lamp with enough ventilation? If it is possible to use the HPS, what CFM fan will be adequate? Is a 125 CFM computer fan enough? Keep in Rating: 5