# Decrease humidity in tent **URL:** \ **Category:** Climate\ **Tags:** firsthydrogrow, flowering\ **Created:** [June 29, 2021, 12:05am UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976 "2021-06-29T00:05:30Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![RH\_PH](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@RH\_PH](https://ilgmforum.com/u/RH_PH)\ **Post date:** [June 29, 2021, 12:05am UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/1 "2021-06-29T00:05:30Z")
Hello ILGM Peeps, I’m a few weeks into flowering in a 4x4 tent, RDWC, 6” exhaust fan and filter, HLG 600 RSpec. My humidity is about 55% with the lights on and then spikes when they go off. I’m assuming I need a dehumidifier in the tent, but all the ones I see online are rated for hundreds or thousands of square feet—much more than 16 sq ft!! Is there a good way to accomplish this? @dbrn32 @Myfriendis410 ---
**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:** [June 29, 2021, 12:12am UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/2 "2021-06-29T00:12:32Z")
there are small dehumidifiers available on Amazon do you keep your exhaust fan on when lights are out ---
**Author:** ![Underthestairs](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/underthestairs/32/689635_2.png) [@Underthestairs](https://ilgmforum.com/u/Underthestairs)\ **Post date:** [June 29, 2021, 12:36am UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/3 "2021-06-29T00:36:59Z")
The most effective way to manage is by controlling the environment in the room your tent is in. “Lung room” ---
**Author:** ![yourviolentpast](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/yourviolentpast/32/726209_2.png) [@yourviolentpast](https://ilgmforum.com/u/yourviolentpast)\ **Post date:** [June 29, 2021, 1:11am UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/4 "2021-06-29T01:11:34Z")
Vivosun has an affordable option meant for tents. ---
**Author:** ![dbrn32](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/dbrn32/32/533801_2.png) [@dbrn32](https://ilgmforum.com/u/dbrn32)\ **Post date:** [June 29, 2021, 4:15am UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/5 "2021-06-29T04:15:49Z")
I suspect you’re seeing rh climb because temp is dropping with lights off. Also wondering if you are keeping your exhaust running even when light is off? ---
**Author:** ![Watt-Sun](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/watt-sun/32/193796_2.png) [@Watt-Sun](https://ilgmforum.com/u/Watt-Sun)\ **Post date:** [June 29, 2021, 3:26pm UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/6 "2021-06-29T15:26:27Z")
@Underthestairs and @dbrn32 are right on. Better to dehumidify the room your drawing fresh air from than the tent itself also keeping your exhaust fans running at lights out should get you in the ball park ✌ ---
**Author:** ![RH\_PH](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@RH\_PH](https://ilgmforum.com/u/RH_PH)\ **Post date:** [June 29, 2021, 6:03pm UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/7 "2021-06-29T18:03:21Z")
Thanks Dave. I had my exhaust fan and light on the same timer–I now have the fan running 24/7. ---
**Author:** ![RH\_PH](https://avatars.discourse-cdn.com/v4/letter/r/73ab20/32.png) [@RH\_PH](https://ilgmforum.com/u/RH_PH)\ **Post date:** [June 29, 2021, 6:09pm UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/8 "2021-06-29T18:09:34Z")
Thanks @Watt-Sun @dbrn32@Underthestairs ! I had the exhaust fan and light on the same timer. The fan is now independent and running 24/7. The tent is in my basement which is about 2,000 ft². The typical RH of the basement is about 55%…not sure what it would take to manage that. ---
**Author:** ![dbrn32](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/dbrn32/32/533801_2.png) [@dbrn32](https://ilgmforum.com/u/dbrn32)\ **Post date:** [June 29, 2021, 7:38pm UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/9 "2021-06-29T19:38:20Z")
Keeping fan on should help with large increases you were seeing at least a little. If you want to drop rh of your basement much lower than 55% you would likely need large fairly efficient unit. I have 70 pint Frigidaire that I can maintain 50% with, but every place could be a little different. ---
**Author:** ![Underthestairs](https://sea2.discourse-cdn.com/growingmarijuana/user_avatar/ilgmforum.com/underthestairs/32/689635_2.png) [@Underthestairs](https://ilgmforum.com/u/Underthestairs)\ **Post date:** [June 30, 2021, 2:17am UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/10 "2021-06-30T02:17:58Z")
Similar for me. I use a large one because we use it as an auxillary living space. No musty basement angel in the downstairs furniture ---
**Author:** ![IslandGrown76](https://avatars.discourse-cdn.com/v4/letter/i/d9b06d/32.png) [@IslandGrown76](https://ilgmforum.com/u/IslandGrown76)\ **Post date:** [June 30, 2021, 2:35am UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/11 "2021-06-30T02:35:06Z")
@RH_PH you can’t increase your exhaust any more? What does it spike to? ---
**Author:** ![IslandGrown76](https://avatars.discourse-cdn.com/v4/letter/i/d9b06d/32.png) [@IslandGrown76](https://ilgmforum.com/u/IslandGrown76)\ **Post date:** [June 30, 2021, 2:35am UTC](https://ilgmforum.com/t/decrease-humidity-in-tent/69976/12 "2021-06-30T02:35:47Z")
Agreed!!!