I need to understand humidity problem

  • Thread starter PjMaC
  • Start date
  • Tagged users None
P

PjMaC

31
18
Here's the situation:

The room is 9x12 with a small closet.
It is kept at 79-80° with a space heater. The vent from the heat pump is sealed.
The door stays closed with a blanket on the outside.
My plants are in a 4x4 tent, but the front door is always open...24/7. I only have the tent up to hang the lights, and mess control.
There is a small fan that blows into the tent from the room to keep it breezy.
I have no exhaust set-up. The only air exchange is when I open the door to check the plants and stuff. About 3-4 times/day. (Im working on it).
I'm running a sf 1000 and a pb1000 on two plants in soil.
I have a humidifier inside the tent that runs 24/7.
I figured my temp/humidity reader was bad. I brought it into the living room and set it right next to the base unit part. They were both the same within about 30 minutes. I figure that means it's working. So

I can't - for the life of me - understand how my humidity can only be 30%.
 
GNick55

GNick55

Staff
Supporter
10,805
438
PjMaC said:
Here's the situation:

The room is 9x12 with a small closet.
It is kept at 79-80° with a space heater. The vent from the heat pump is sealed.
The door stays closed with a blanket on the outside.
My plants are in a 4x4 tent, but the front door is always open...24/7. I only have the tent up to hang the lights, and mess control.
There is a small fan that blows into the tent from the room to keep it breezy.
I have no exhaust set-up. The only air exchange is when I open the door to check the plants and stuff. About 3-4 times/day. (Im working on it).
I'm running a sf 1000 and a pb1000 on two plants in soil.
I have a humidifier inside the tent that runs 24/7.
I figured my temp/humidity reader was bad. I brought it into the living room and set it right next to the base unit part. They were both the same within about 30 minutes. I figure that means it's working. So

I can't - for the life of me - understand how my humidity can only be 30%.
Click to expand...
what happens without the heater?
is there a big swing in humidity % with lights on and off?
 
GNick55

GNick55

Staff
Supporter
10,805
438
your in soil so temps between 68-77 are fine..
 
P

PjMaC

31
18
GNick55 said:
what happens without the heater?
is there a big swing in humidity % with lights on and off?
Click to expand...
On both replies (I don't know how to quote both in one lol)
Very little swing. I haven't turned the heater off. I've been under the impression that with led temps in low to mid 80s?
 
P

PjMaC

31
18
freezeland2 said:
The humidifier isn’t up to the job. If it’s inside the tent you need to close the tent. It just isn’t got enough capacity to humidify the room and tent.
Click to expand...
That's possible. It may not be. In my head tho, 1/2 gallon of water a day seems like it should do a 9x12?
 
MIGrampaUSA

MIGrampaUSA

3,732
263
PjMaC said:
Here's the situation:

The room is 9x12 with a small closet.
It is kept at 79-80° with a space heater. The vent from the heat pump is sealed.
The door stays closed with a blanket on the outside.
My plants are in a 4x4 tent, but the front door is always open...24/7. I only have the tent up to hang the lights, and mess control.
There is a small fan that blows into the tent from the room to keep it breezy.
I have no exhaust set-up. The only air exchange is when I open the door to check the plants and stuff. About 3-4 times/day. (Im working on it).
I'm running a sf 1000 and a pb1000 on two plants in soil.
I have a humidifier inside the tent that runs 24/7.
I figured my temp/humidity reader was bad. I brought it into the living room and set it right next to the base unit part. They were both the same within about 30 minutes. I figure that means it's working. So

I can't - for the life of me - understand how my humidity can only be 30%.
Click to expand...
30% humidity is fairly common inside during the winter months in cold climates. It's because heating the house dries out the air. You would be better off with a large enough humidifier to bring up the humidity in the room that the tent is in. That way the air enters already conditioned. It's difficult to regulate inside the tent and too much moisture will condense on the inside walls potentially causing other issues.
 
P

PjMaC

31
18
MIGrampaUSA said:
30% humidity is fairly common inside during the winter months in cold climates. It's because heating the house dries out the air. You would be better off with a large enough humidifier to bring up the humidity in the room that the tent is in. That way the air enters already conditioned. It's difficult to regulate inside the tent and too much moisture will condense on the inside walls potentially causing other issues.
Click to expand...
So my heater + the inadequate size of my humidifier is the culprit?
This is what I get from y'all in the helpful replies. I cannot thank you enough for helping me to understand how this works.
Would I be better off - with what I have - to turn off the space heater and open the vent? Or turn it off and leave the vent closed?
I can't close the tent right now. It's a long explainatiin that will amount to alot of excuses lol.
 
GNick55

GNick55

Staff
Supporter
10,805
438
PjMaC said:
On both replies (I don't know how to quote both in one lol)
Very little swing. I haven't turned the heater off. I've been under the impression that with led temps in low to mid 80s?
Click to expand...
oh you have LED’s yes 80 or so is good..
sorry didn’t notice
 
MIGrampaUSA

MIGrampaUSA

3,732
263
PjMaC said:
No sorrys lol. Everything helps. I just can't wrap my head around this.
Click to expand...
Space heaters are expensive. What happens if you open the register vent and allow the heat pump to heat the room? Does your humidity rise or does it remain the same?
 
P

PjMaC

31
18
MIGrampaUSA said:
Space heaters are expensive. What happens if you open the register vent and allow the heat pump to heat the room? Does your humidity rise or does it remain the same?
Click to expand...
That's a good question. I haven't tried that. I keep my house thermostat set at 68. With the LEDs, I worry about the temperature being to low. I am willing to try it if the lower temperature won't hurt as much as the low humidity.
 
freezeland2

freezeland2

3,421
263
PjMaC said:
So my heater + the inadequate size of my humidifier is the culprit?
This is what I get from y'all in the helpful replies. I cannot thank you enough for helping me to understand how this works.
Would I be better off - with what I have - to turn off the space heater and open the vent? Or turn it off and leave the vent closed?
I can't close the tent right now. It's a long explainatiin that will amount to alot of excuses lol.
Click to expand...
If you get a bigger humidifier then humidify the room the tent is in. You should also consider adding a exhaust fan to the tent. It will pull air from the room into the tent through the lower vents. The ac infinity fans can be had with a temp/humidity controller that turns the fan on/off to maintain the set temp/humidity in the tent. You can also use a Inkbird to control tent environment. Humidity in winter can be a battle as you are finding out. I am currently running two cool mist humidifiers to keep my 4x8 grow room at 60%. The rest of the house is currently at 22% rh.
 
MIGrampaUSA

MIGrampaUSA

3,732
263
PjMaC said:
That's a good question. I haven't tried that. I keep my house thermostat set at 68. With the LEDs, I worry about the temperature being to low. I am willing to try it if the lower temperature won't hurt as much as the low humidity.
Click to expand...
We'll get back to the tent temperature in a bit ... Let's see if turning off the space heater raises the humidity first.
 
freezeland2

freezeland2

3,421
263
PjMaC said:
That's a good question. I haven't tried that. I keep my house thermostat set at 68. With the LEDs, I worry about the temperature being to low. I am willing to try it if the lower temperature won't hurt as much as the low humidity.
Click to expand...
Look for a vpd chart. It will help you target the humidity based on the temp.
 
GanjaFarmer24

GanjaFarmer24

386
93
I had to put my exhaust fan on a switch so it only ran some of the time, I was sucking out all my good humidity. It only exhausts over 85*F now instead of being on all the time dimmed down.
 
P

PjMaC

31
18
freezeland2 said:
If you get a bigger humidifier then humidify the room the tent is in. You should also consider adding a exhaust fan to the tent. It will pull air from the room into the tent through the lower vents. The ac infinity fans can be had with a temp/humidity controller that turns the fan on/off to maintain the set temp/humidity in the tent. You can also use a Inkbird to control tent environment. Humidity in winter can be a battle as you are finding out. I am currently running two cool mist humidifiers to keep my 4x8 grow room at 60%. The rest of the house is currently at 22% rh.
Click to expand...
Two for a 4x8? Ok I get that now. My house sits around 25-30% in winter.

I really am working on the exhaust. I have an inkbird temp/humidity controller, a carbon filter, and an ac infinity fan in my cart lol.
 
You must log in or register to reply here.

Latest posts

Top Bottom