# Need Information regarding fans **URL:** \ **Category:** Autoflowers\ **Tags:** autoflower, indoor-grow\ **Created:** [August 3, 2021, 11:53pm UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300 "2021-08-03T23:53:51Z")\ **Posts on this page:** 19\ **Page:** 1
**Author:** ![VOL4LIFE](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/vol4life/32/611529_2.png) [@VOL4LIFE](https://ilgmforum.com/u/VOL4LIFE)\ **Post date:** [August 3, 2021, 11:53pm UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/1 "2021-08-03T23:53:51Z")
I need to know what type of fans I need for a MARS Hydro 4ft X 4ft X 80 inches tent. I have the tent in an air conditioned room. ---
**Author:** ![Audiofreak](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/audiofreak/32/696429_2.png) [@Audiofreak](https://ilgmforum.com/u/Audiofreak)\ **Post date:** [August 4, 2021, 12:14am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/2 "2021-08-04T00:14:06Z")
For exhust I look at the AC INFINITY 8 inch. ---
**Author:** ![Nicky](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/nicky/32/397422_2.png) [@Nicky](https://ilgmforum.com/u/Nicky)\ **Post date:** [August 4, 2021, 3:56am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/3 "2021-08-04T03:56:11Z")
I have a 4x5x8 and a 6inch works fine, I also agree AC infinity T6 is my preferred fan but the cheap ones work with a cheap controller. @Audiofreak I think few 4x4 have a 8" hole? 4x4x8=128 cmf So any fan that can do at least that much really. But more is better so you can control heat on hot data with powerful lights. ![ventilation-guide.-artwork-3](https://global.discourse-cdn.com/growingmarijuana/original/4X/a/6/e/a6eafb6daa3343b2530414ae9d2ef520ba807711.jpeg) ---
**Author:** ![cgordon1981](https://avatars.discourse-cdn.com/v4/letter/c/82dd89/32.png) [@cgordon1981](https://ilgmforum.com/u/cgordon1981)\ **Post date:** [August 4, 2021, 7:55am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/4 "2021-08-04T07:55:49Z")
You usually won’t regret having too much airflow but will always regret not having enough. Do the math and make sure it’s enough and leave some room to crank it up if you need to or have to re arrange the exhaust, etc. I have a 2x4 with a Terrabloom 6" EC Fan that pushes about 400 cfm and wish i had more on hot days even with LED lights. I do however have a single somewhat tightish u bend right after the carbon filter. Which brings up another point carbon filters really cut the cfm way down, i think like half. ---
**Author:** ![kellydans](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/kellydans/32/580751_2.png) [@kellydans](https://ilgmforum.com/u/kellydans)\ **Post date:** [August 4, 2021, 10:14am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/5 "2021-08-04T10:14:16Z")
Welcome to the community ! I ran a 6 inch exhaust fan in a 4 x4 space with a variable speed normally in the medium range work’s great. Good luck ---
**Author:** ![GreenSnek](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/greensnek/32/366307_2.png) [@GreenSnek](https://ilgmforum.com/u/GreenSnek)\ **Post date:** [August 4, 2021, 11:11am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/6 "2021-08-04T11:11:14Z")
I agree 6 inches is fine I rarely run it higher then 5/8 , just be sure to get a good internal fan circulating and you’ll be fine ---
**Author:** ![VOL4LIFE](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/vol4life/32/611529_2.png) [@VOL4LIFE](https://ilgmforum.com/u/VOL4LIFE)\ **Post date:** [August 6, 2021, 3:39am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/7 "2021-08-06T03:39:35Z")
I just bought an AC infiniti 6 inch fan with carbon filter. The tent is in an air conditioned room. Will that set up work? ---
**Author:** ![VOL4LIFE](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/vol4life/32/611529_2.png) [@VOL4LIFE](https://ilgmforum.com/u/VOL4LIFE)\ **Post date:** [August 6, 2021, 3:43am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/8 "2021-08-06T03:43:43Z")
Should I use the Carbon Filter I bought with my 6 inch AC Infiniti fan? I have the tent in an air conditioned room. ---
**Author:** ![VOL4LIFE](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/vol4life/32/611529_2.png) [@VOL4LIFE](https://ilgmforum.com/u/VOL4LIFE)\ **Post date:** [August 6, 2021, 3:45am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/9 "2021-08-06T03:45:39Z")
Do you use a carbon filter? ---
**Author:** ![dirtydave](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/dirtydave/32/626820_2.png) [@dirtydave](https://ilgmforum.com/u/dirtydave)\ **Post date:** [August 6, 2021, 3:46am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/10 "2021-08-06T03:46:31Z")
You use the carbon filter to control odor you won’t need it till flower ---
**Author:** ![VOL4LIFE](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/vol4life/32/611529_2.png) [@VOL4LIFE](https://ilgmforum.com/u/VOL4LIFE)\ **Post date:** [August 6, 2021, 3:58am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/11 "2021-08-06T03:58:37Z")
Will it Cut my CFM in half? Someone stated that and I got worried the Filter will cut its CFM down too low. ---
**Author:** ![GreenSnek](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/greensnek/32/366307_2.png) [@GreenSnek](https://ilgmforum.com/u/GreenSnek)\ **Post date:** [August 6, 2021, 4:01am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/12 "2021-08-06T04:01:16Z")
Yes I do it doesn’t cut it by much especially with a new unclogged filter ---
**Author:** ![VOL4LIFE](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/vol4life/32/611529_2.png) [@VOL4LIFE](https://ilgmforum.com/u/VOL4LIFE)\ **Post date:** [August 6, 2021, 4:08am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/13 "2021-08-06T04:08:40Z")
Thank you so much! ---
**Author:** ![Nicky](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/nicky/32/397422_2.png) [@Nicky](https://ilgmforum.com/u/Nicky)\ **Post date:** [August 6, 2021, 4:13am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/14 "2021-08-06T04:13:57Z")
Run the filter in flower, not in veg to prolong the life. ---
**Author:** ![VOL4LIFE](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/vol4life/32/611529_2.png) [@VOL4LIFE](https://ilgmforum.com/u/VOL4LIFE)\ **Post date:** [August 6, 2021, 4:44am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/15 "2021-08-06T04:44:13Z")
Thank you so much!! ---
**Author:** ![kellydans](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/kellydans/32/580751_2.png) [@kellydans](https://ilgmforum.com/u/kellydans)\ **Post date:** [August 6, 2021, 10:08am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/16 "2021-08-06T10:08:19Z")
Yes I would use it your filter will be fine. I buy a new filter for each grow but I’m also in a unfriendly state. That way what I exhaust outside is odor-free. ---
**Author:** ![GreenSnek](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/greensnek/32/366307_2.png) [@GreenSnek](https://ilgmforum.com/u/GreenSnek)\ **Post date:** [August 6, 2021, 10:25am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/17 "2021-08-06T10:25:23Z")
I can stretch mine to 1 every 6 months if I cut out the winter grow I might get away 1 a year ---
**Author:** ![kellydans](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/kellydans/32/580751_2.png) [@kellydans](https://ilgmforum.com/u/kellydans)\ **Post date:** [August 6, 2021, 10:35am UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/18 "2021-08-06T10:35:56Z")
Happy cake day ! ---
**Author:** ![VOL4LIFE](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/vol4life/32/611529_2.png) [@VOL4LIFE](https://ilgmforum.com/u/VOL4LIFE)\ **Post date:** [August 6, 2021, 7:02pm UTC](https://ilgmforum.com/t/need-information-regarding-fans/72300/19 "2021-08-06T19:02:49Z")
Thanks!