Humidity vs relative humidity

[Ganjamann2020]

I bought a humidifier for my tent with a digital readout that measures relative humidity vs humidity, my Thermometer/hygrometer reads 40% indoor humidity and the relative humidity id 80-83%, is this good or should I set my humidifier higher? I'm thinking if I set it to max 95% relative humidity the actual humidity should rise closer to 50%?

 

[hotrodharley]

Relative humidity meaning as reported by the weather service? Indoor is always lower. Outdoors is irrelevant except for its involvement in humidity in general.

 

[WubbaLubbaDubDub]

I’m not sure I completely understand what your asking but I’ve smoked a lot today.

What is the temperature in your room?
Humidity and the amount of water that can be suspended in air is greatly affected by temperature

 

[Ganjamann2020]

I’m not sure I completely understand what your asking but I’ve smoked a lot today.

What is the temperature in your room?
Humidity and the amount of water that can be suspended in air is greatly affected by temperature

The temperature in the tent is between 77-82 degrees consistently, and the hygrometer reads 40% humidity which I gather is the absolute low on the spectrum and i wish to raise it so i got a humidifier, but the setting only reads relative humidity so it won't come on unless it drops below the relative humidity setting i choose. It's a cheap humidifier, but it's made for a big room i figured it would work great in an enclosed 48x24x60 area.

 

[Ganjamann2020]

Relative humidity meaning as reported by the weather service? Indoor is always lower. Outdoors is irrelevant except for its involvement in humidity in general.

No it's the relative humidity inside my tent as measured by my humidifier, outside doesn't affect my area that much, I pretty much am trying to take complete control of the inner environment

 

[WubbaLubbaDubDub]

The temperature in the tent is between 77-82 degrees consistently, and the hygrometer reads 40% humidity which I gather is the absolute low on the spectrum and i wish to raise it so i got a humidifier, but the setting only reads relative humidity so it won't come on unless it drops below the relative humidity setting i choose. It's a cheap humidifier, but it's made for a big room i figured it would work great in an enclosed 48x24x60 area.

Are you venting in fresh air and exhausting out hot air constantly?
If your fans are always exchanging your tent/room will be the RH of your house. You’d need to raise the humidity around the tent.

how old is your hygrometer? Could be off?
Maybe throw another one beside it and see how they compare?

 

[hotrodharley]

I don’t believe that initial indoor measurement. What equipment including lights is running in there?

 

[WubbaLubbaDubDub]

I don’t believe that initial indoor measurement. What equipment including lights is running in there?

That would help to know too!
I like stabbing in the dark, Gets the noodle thinking

 

[Ganjamann2020]

No it's the relative humidity inside my tent as measured by my humidifier, outside doesn't affect my area that much, I pretty much am trying to take complete control of the inner environment

Never mind I'm impatient, it reads relative and actual humidity and it's working as intended. I shocked my previous attempt into flowering at 23 days don't want that happening to the new one lol.

 

[hotrodharley]

It would be raining inside the tent and it happens. So is it wet in there? Water on leaves? Especially if they’re laying on another leaf.

 

[hotrodharley]

Never mind I'm impatient, it reads relative and actual humidity and it's working as intended. I shocked my previous attempt into flowering at 23 days don't want that happening to the new one lol.

Are you using a VPD chart?

 

[Ganjamann2020]

It would be raining inside the tent and it happens. So is it wet in there? Water on leaves? Especially if they’re laying on another leaf.

I was having an issue with low humidity in the 30s, I added a humidifier with a humidistat to raise it a bit and keep it kind of steady
I set it on 50% and hopefully that will keep it up. I think low humidity combined with a small pot forced my auto to flower early, don't want to repeat that, and if I get the conditions perfect I can attribute my issues to genetics.

 

[ComfortCreator]

You should set the humidifier to whatever it needs to be set to in order to get the result you want in the room, not the humidifier read out.

So it doesnt matter if you set the humidifier to 40 or 70 to get to your target. The machine has its own sensor and with an exhaust running it will likely have to be set lower than the room target to hit it.

Mine is set to 50% on the humidifier, and the room is steady around 58%.

 

[Ganjamann2020]

You should set the humidifier to whatever it needs to be set to in order to get the result you want in the room, not the humidifier read out.

So it doesnt matter if you set the humidifier to 40 or 70 to get to your target. The machine has its own sensor and with an exhaust running it will likely have to be set lower than the room target to hit it.

Mine is set to 50% on the humidifier, and the room is steady around 58%.

which is why I have a hygrometer in my tent that I go by, already raised my humidity up to 45%, I guess I just have to dial it in.

 

[Ganjamann2020]

You should set the humidifier to whatever it needs to be set to in order to get the result you want in the room, not the humidifier read out.

So it doesnt matter if you set the humidifier to 40 or 70 to get to your target. The machine has its own sensor and with an exhaust running it will likely have to be set lower than the room target to hit it.

Mine is set to 50% on the humidifier, and the room is steady around 58%.

My problem was humidity in the 30s, and my soil was drying out quick. I had to raise it, even wet sponges by the intake fan only got it up to 38-40, was starting to wonder if my hygrometer is working properly. There is an 11% point difference between readings, the humidifier is reading higher than the hygrometer.

 

[Jjgrow420]

if youre flowering why do you want to raise humidity?

 

[Ganjamann2020]

if youre flowering why do you want to raise humidity?

thought it needed to be around 40%.

 

[Jjgrow420]

eh. my house is drier than a nuns cunt.
itll drop to 20% or less in the winter. i run a humidifier and itll go up to 25 tops. no biggie. if you have alot of air movement itll drop the rh even more. id rather be on the drier side during flower anyways especially near the end. i wouldnt be overly concerned over 10% rh. its not going to make or break your grow in the least.

whats soil drying quick to you? it should dry in 2 days 3 tops. otherwise your roots are in an aquarium not dirt. plus as the plants get bigger and root systems develop they will pull in more water

 

[oill]

Relative humidity meaning as reported by the weather service? Indoor is always lower. Outdoors is irrelevant except for its involvement in humidity in general.

Relative humidity is in relation to temps... the warmer the air the more moisture it can carry....

 

[Ganjamann2020]

eh. my house is drier than a nuns cunt.
itll drop to 20% or less in the winter. i run a humidifier and itll go up to 25 tops. no biggie. if you have alot of air movement itll drop the rh even more. id rather be on the drier side during flower anyways especially near the end. i wouldnt be overly concerned over 10% rh. its not going to make or break your grow in the least.

whats soil drying quick to you? it should dry in 2 days 3 tops. otherwise your roots are in an aquarium not dirt. plus as the plants get bigger and root systems develop they will pull in more water

It's not getting any bigger lol