So I plan on using a 600w setup, making a 4.5x4.5 grow box with mylar on the walls, one fan blowing on the plants, one squirel fan at the bottom of my box to bring in air from the room, another squirel fan at the top of the box to filter the air out of the box. I will probably have that one attached to some kind of tubing to vent it outside. I also plan on using a carbon Filter Scrubber. My question is 1. Will the smell be that strong if i just filter the air outside or should i get the carbon filter scrubber to take some odor out first? (I live in an apartment with other tenants, i don't want people to know my business) 2. Also if I'm just going to use cheap wood to make my box with, would you paint it white or use mylar? 3.Does this sound about right to have a successful grow? 4. Can I get enough C02 to my plants by taking the air from the room or will i need a C02 system?5. Any suggestions?

Thanks for providing some background. I'll be glad to give you some suggestions. All from my own trial and error.

__________________
cb
If you don't run, you rust. - Tom Petty
“From each according to his ability, to each according to his need”, a scheme to enslave the able to the unable. - Ayn Rand

(Grrrr, ran out of edit time)

First, you really don't need powered or fan assisted intakes. Your exhaust fans will create enough vacuum to pull fresh air from the passive intakes.

You WILL need a carbon scrubber, or some kind of odor control. I haven't found a strain yet that is not stinky in flower.

You should lose the mylar, go with flat white paint. Almost as good reflectively and much easier to install and maintain.

If you make sure your plants get enough fresh air, you will have no need for CO2. Get all your other things (lighting, ventilation, nutrients, etc.) dialed in perfectly before even thinking about adding CO2.

Pay serious attention to your ventilation, I cannot stress this enough! When growing in an enclosed area, you have to have a way to get fresh cool air into the box and a way to get stale, stinky, hot air out. All without letting in extra light that you don't want.

A hint on ventilation: draw it out on paper first. To use your exhaust fan(s) efficiently, the fan should be the last thing in the ventilation stream. The fan should always be pulling through the carbon filter.

I believe I gave you the link to the grow room setup sticky. That helped me immensely.

Good luck.

__________________
cb
If you don't run, you rust. - Tom Petty
“From each according to his ability, to each according to his need”, a scheme to enslave the able to the unable. - Ayn Rand

So if my dimensions of my box are 4.5x4.5 maybe about 6 or seven feet high, would this carbon filter scrubber be enough power to clean my air efficiently, I really don't want anyone to be able to smell it outside either as i don't live in a great area (they'd steal it). Oh and this might be a completely dumb question, but im new to growing, so by these dimensions of my box, how big should the passive air intakes be? Passive just means puttin a hole in the bottom of the grow box right?

NEW 4 inch CARBON FILTER FAN COMBO inline odor scrubber - eBay (item 400059071112 end time Aug-29-09 13:09:26 PDT)

crap sorry i forgot to post this in my last response, would this do the trick with my dimensions?

I use and Odorsok on 2 seperate cabs and have no smell escaping

thanks I'm almost ready to get started just a few questions i still need to clear up. with my setup, with a 4x4x6or7, with a 600w, would you SOG or SCROG or try to grow some small trees? I will probably use snow white, master kush, and wonder woman.