Humidifier/Dehumidifier guide

[monkeytree 24]

1. Humidifer near the intake, dehumidifer near the outtake as your more likely to be bringing in less humid air and extracting more humid air.

 

When you start the grow you will normally find your using the humidifier a lot as small plants don’t transpire as much. The pain of this is if your looking to go 75-85% and your unit is only 8l then you could find you need to fill it up every couple of days. Depending on where your tent is located.

 

As your plants mature and start to transpire more low humidity becomes less of a problem and you will find the opposite problem where your dehumidifer tank gets full regularly (unless you can drain to waste). Or you need more air extraction.

 

You can use a controller to turn one off and the other on but if you go for a units with built humidistat then you can set the desired RH and leave them too it. Humidifer set at 75% and dehumidifier set at 85% and it should stay somewhere in range.

 

Also depending on your situation look at desiccant dehumidifers as these are more effective at low temperatures and produce less heat.

 

2. Pointless with 24/7 extraction, your extraction can obviously help to lower humidity by removing the more humid air. As my previous comment about small plants, if your humidifier is running 24/7 because your just pulling out what you have added in then you probably need to look at slowing your extraction. Then you get onto the question of supplementing Co2.
 

3. Some do offer room size suitability guidelines.

 

Best of luck.

[Deeznugs 14]

9 minutes ago, monkeytree said:

1. Humidifer near the intake, dehumidifer near the outtake as your more likely to be bringing in less humid air and extracting more humid air.

 

When you start the grow you will normally find your using the humidifier a lot as small plants don’t transpire as much. The pain of this is if your looking to go 75-85% and your unit is only 8l then you could find you need to fill it up every couple of days. Depending on where your tent is located.

 

As your plants mature and start to transpire more low humidity becomes less of a problem and you will find the opposite problem where your dehumidifer tank gets full regularly (unless you can drain to waste). Or you need more air extraction.

 

You can use a controller to turn one off and the other on but if you go for a units with built humidistat then you can set the desired RH and leave them too it. Humidifer set at 75% and dehumidifier set at 85% and it should stay somewhere in range.

 

Also depending on your situation look at desiccant dehumidifers as these are more effective at low temperatures and produce less heat.

 

2. Pointless with 24/7 extraction, your extraction can obviously help to lower humidity by removing the more humid air. As my previous comment about small plants, if your humidifier is running 24/7 because your just pulling out what you have added in then you probably need to look at slowing your extraction. Then you get onto the question of supplementing Co2.
 

3. Some do offer room size suitability guidelines.

 

Best of luck.

Ask and it shall be delivered:) thank you good friend perfect answer

[scottishgorilla420 96]

hoping someone can help me and save me hours of looking i have a 1.2x1.2 m tent temps steady around 26 but humidity is about 30 i have a ram ultrasonic humidifier but am i right to think tap water is no good ? 

[smeghedz 0]

Help needed asap, bit of a noob but never had to deal with RH being so high in room, garage grow with good intake / extraction, problem is, whatever outside rh is its the same inside, tent in a room in garage, tried dehumidifier in tent, in room , and outside room venting into room thru 6 " tube, none of which makes any difference whatsoever, what am i missing, or are my dehum's just not good enough, temp is set to 26 and stable but rh is always same as garage