RH

Is there a way to lower the rh without a dehumidifier that weights on your electricity? My dehu is 400w and im looking for an alternative.

Only way I’ve found is to add a electric heater, but those are even more of a power draw.

If your in a sealed room that's the way to go. If not just exhaust the humid air out and bring fresh air in.....thats assuming your outdoor air is less humid than you grow room's. Have that fan set up with a humidity controller.

+1 exchange humid air, if you live far north and its like -20 or -30 outside the cold air outside your building would have lower humidity a passive intake might work

Have my intake all set. Its when i set my CF that the humidity went UP from 60 to 80Rh. And for it to keep low i have my dehu around 6 to 7 hours everyday

jcdws602 said:

If your in a sealed room that's the way to go. If not just exhaust the humid air out and bring fresh air in.....thats assuming your outdoor air is less humid than you grow room's. Have that fan set up with a humidity controller.

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Im exhausting outside but its Just the outdoor Air that is too humid

Bringing in fresh air may not help lower the humidity if the fresh air is colder than the room air. They call "RH" (relative humidity) instead of just straight humidity for a reason, because it's relative. Relative to the temp. If the heat goes up and the total amount of water in the air stays the same, the RH goes down. Conversely, if you bring in fresh colder air of similar or greater RH to the warmer room, the temp will drop and RH will go up.

To lower RH you only have two options:
1. remove water from the air
2. increase the temps

Both of those usually require power. A dehuey will do both remove the water, and also increase the temps due to the byproduct of heat produced by electricity, so is really the best option, unless you can bring in fresh low RH air.

Thank you all. Managed to bring the humidity down by adding another fan inside. From 80ish to 50ish. The only problem now is dark hours ir goes back to 70ish. Any tips?

Znglhs said:

Thank you all. Managed to bring the humidity down by adding another fan inside. From 80ish to 50ish. The only problem now is dark hours ir goes back to 70ish. Any tips?

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That's because your temps decrease when the lights turn off, resulting in higher RH. As noted in the post above yours, if you can't increase temps, then you need to remove moisture from the air.

Znglhs said:

Thank you all. Managed to bring the humidity down by adding another fan inside. From 80ish to 50ish. The only problem now is dark hours ir goes back to 70ish. Any tips?

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Leave the fan on all night.