need advice on filters

Ok I have this one http://www.gothamhydroponics.com/fans-filters-ducts/filters/6in-300mm-hydroponic-carbon-filter.html but im not sure how good it is and I was looking at the phresh filters they seem like them might be better need one for a 4 x 8 x6.5 room what do you guys recommend

I would use about 700 cfm carbon filter exhausted at about 350 cfm..
I prefer Phresh filters. They did better than CAN and Phat for me.
Replace every 9 months. Higher humidity means you will need to change it more often.

That is larger than most people do... but when I pull up to friends houses I smell it from driveway. That doesn't fly for me.

These numbers are for smell control. If you have heat issues and you plan to solve them with lots of exhaust then the numbers could change.
Air cooled hoods on a separate air circuit would be ideal.

In Illinois warm temps won't be as big of a problem. Skip July and August and you could prbly get by without aircooling your lights..

I have 2 6 inch inline fans 440 cfm a piece one for lights and one exhaust but do you think with the filter on it would be enough?

Depends on the number of plants and the strain. Some strains arent that "stinky", while others have an extremely strong odor.

sourdieselyumyum said:

I have 2 6 inch inline fans 440 cfm a piece one for lights and one exhaust but do you think with the filter on it would be enough?

Click to expand...

yeah... definitely. run it full blast with 750 - 950 cfm filter. No smell. Doesn't matter if you have the stinkiest of stinky plants. 750 - 950 with a 440 pulling will do the job.
Phresh are effective and sooo lightweight. Lightweight is key for suspending high above the plants.. which you want.