Venting times and frequency.... whats your take???

TorontoGQ

TorontoGQ

Well-Known Member
Hello, i have a question about intake and out-taking air in the grow room, i have a 168sq foot room with a 250cfm, 6" incline fan for output and one for intake as well. I will be using 8 T5 fluorescents (surrounding the room 2 per wall) and 2 90 watt LEDs hanging from the top.

Now my question is, should i have the fans on a timer to turn on a few times a day to vent the stall air out and bring in new air.....or should i have them on 24/7 or have them plugged into a thermostat and when the room gets over a certain temp, have them turn the fans on?

I'm a first time grower and any an all help would be greatly appreciated.

Thanks
-GQ​
 
johnni blaze

johnni blaze

Member
having them on a majority of the time is very useful for the plants because it keeps the air fresh for them. it also helps with keeping the heat down, but since youre using FLs and LEDs then i wouldnt worry about it too much. just make sure there is good air circulation throughout the whole plant life cycle because this could stun growth if there isnt adequate air for the plant. with the fans plugged into the thermostat- great idea, but why would you risk getting your temperature that high anyways? in my opinion keep it on. hope this helps
 
TorontoGQ

TorontoGQ

Well-Known Member
johnni blaze said:
having them on a majority of the time is very useful for the plants because it keeps the air fresh for them. it also helps with keeping the heat down, but since youre using FLs and LEDs then i wouldnt worry about it too much. just make sure there is good air circulation throughout the whole plant life cycle because this could stun growth if there isnt adequate air for the plant. with the fans plugged into the thermostat- great idea, but why would you risk getting your temperature that high anyways? in my opinion keep it on. hope this helps
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Hey Thanks for your input, but here is the thing, 1. the intake fan is near the floor and is kinda noisey, i live in a apartment and i'm sure the nieghbors below me would complain....Also i'm not using my grow room just yet as have just started seeds, although my grow room is all set up and ready to go, i have a wireless thermometer/humidity device in there...and with nothing on, no lights, fans etc....the temp is 26 almost 27 Celius (80-81F) in there now...so i can imagine the temp would go up more when the T5's turn on....thats why i'm thinking to go the thermostat route.
 
YOUNG BUCK

YOUNG BUCK

Well-Known Member
TorontoGQ said:
Hello, i have a question about intake and out-taking air in the grow room, i have a 168sq foot room with a 250cfm, 6" incline fan for output and one for intake as well. I will be using 8 T5 fluorescents (surrounding the room 2 per wall) and 2 90 watt LEDs hanging from the top.

Now my question is, should i have the fans on a timer to turn on a few times a day to vent the stall air out and bring in new air.....or should i have them on 24/7 or have them plugged into a thermostat and when the room gets over a certain temp, have them turn the fans on?

I'm a first time grower and any an all help would be greatly appreciated.

Thanks
-GQ​
Click to expand...
You only need fans and extraction running when the lights are on.
 
northeastern lights

northeastern lights

Well-Known Member
YOUNG BUCK said:
You only need fans and extraction running when the lights are on.
Click to expand...


Not true, when lights off your at high risk of high RH. Get a cheap temp/RH meter so you can check the high and lows for the day. I keep mine running 24/7. Also to keep noise down on you inline fan they sell dimmers for 25-30 bucks. I only have an exhaust fan and a passive intake. Works great as I create a vacume effect. I wired in my dimmer but they sell them so you can just plug in and go, I also have one of those, it's called the Speedster.



Exaust





Intake





Dimmer



 
YOUNG BUCK

YOUNG BUCK

Well-Known Member
Not true, when lights off your at high risk of high RH. Get a cheap temp/RH meter so you can check the high and lows for the day. I keep mine running 24/7. Also to keep noise down on you inline fan they sell dimmers for 25-30 bucks. I only have an exhaust fan and a passive intake. Works great as I create a vacume effect. I wired in my dimmer but they sell them so you can just plug in and go, I also have one of those, it's called the Speedster.

Whats not true ????????...........


Exaust





Intake





Dimmer



[/QUOTE]
 
northeastern lights

northeastern lights

Well-Known Member
Any amature knows when growing leaves that touch will form moisture, stagnat moisture will create mold. High air flow elemenates this. Lets see your no flow room. When lights are off RH gets even higher without the heat of the lights. I also have a wall mounted fan stiring up the air and a 24 inch box fan for below the canopy. My grows speak for themselves. This ain't my first rodeo, sit back and swallow your pride buck.
 
TorontoGQ

TorontoGQ

Well-Known Member
northeastern lights said:
Not true, when lights off your at high risk of high RH. Get a cheap temp/RH meter so you can check the high and lows for the day. I keep mine running 24/7. Also to keep noise down on you inline fan they sell dimmers for 25-30 bucks. I only have an exhaust fan and a passive intake. Works great as I create a vacume effect. I wired in my dimmer but they sell them so you can just plug in and go, I also have one of those, it's called the Speedster.


Well Thank you N East Lights for your input....but just to make sure i understand the point that your getting at is, that i should have the intake and exaust running 24/7 ??? Or do you think the thermostat route is ok with the fans turning on only when it gets above the temp i want it ?
Click to expand...
 
northeastern lights

northeastern lights

Well-Known Member
TorontoGQ said:
northeastern lights said:
Not true, when lights off your at high risk of high RH. Get a cheap temp/RH meter so you can check the high and lows for the day. I keep mine running 24/7. Also to keep noise down on you inline fan they sell dimmers for 25-30 bucks. I only have an exhaust fan and a passive intake. Works great as I create a vacume effect. I wired in my dimmer but they sell them so you can just plug in and go, I also have one of those, it's called the Speedster.


Well Thank you N East Lights for your input....but just to make sure i understand the point that your getting at is, that i should have the intake and exaust running 24/7 ??? Or do you think the thermostat route is ok with the fans turning on only when it gets above the temp i want it ?
Click to expand...

Depends on the size of your room, plants don't need fresh air they need Co2. I prefer constant air flow even when not needed rather than on and off. Also depends on you RH. Like I said go to walmart and pick yourself up a temp/rh gauge that records the high and lows for the day, I get mine there for about 8 bucks. As long as temps and RH is in check you don't have to keep it constant. But if your not sure it would just be easier to have a slow constant flow.
Click to expand...
 
YOUNG BUCK

YOUNG BUCK

Well-Known Member
northeastern lights said:
Any amature knows when growing leaves that touch will form moisture, stagnat moisture will create mold. High air flow elemenates this. Lets see your no flow room. When lights are off RH gets even higher without the heat of the lights. I also have a wall mounted fan stiring up the air and a 24 inch box fan for below the canopy. My grows speak for themselves. This ain't my first rodeo, sit back and swallow your pride buck.
Click to expand...

Show me where it says you need fans running when the lamps are off (proove it).
 

Attachments

YOUNG BUCK

YOUNG BUCK

Well-Known Member
northeastern lights said:
Powder Mildew Buck. I'm not trying to give you a hard time but don't tell me I'm wrong when I'm right.
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But you are wrong. All i asked is for you to prove to me where it says you need to run fans and extraction when its lights out.
Start a post asking the people on the site.
 
TorontoGQ

TorontoGQ

Well-Known Member
northeastern lights said:
TorontoGQ said:
Depends on the size of your room, plants don't need fresh air they need Co2. I prefer constant air flow even when not needed rather than on and off. Also depends on you RH. Like I said go to walmart and pick yourself up a temp/rh gauge that records the high and lows for the day, I get mine there for about 8 bucks. As long as temps and RH is in check you don't have to keep it constant. But if your not sure it would just be easier to have a slow constant flow.
Click to expand...

Ok, i'm a newbie....but just to make sure when you say "rh" i'm guessing it stands for "room humidity" ? If that is the case i do have a temp/rh gauge in there that is wireless and does the min/max for the day, So like i stated in my first post, with no lights on or fans....it's 26.8 Celsius in there right now with a 34% humidity....So i know it would be different if i had plants in there...but i'm thinking if i have a thermostat that turns the fans on only when needed i'd be good night or day.....and if "watered plants" were in there now...i'm sure the humidity would be higher and at or close to the proper range..... correct?
Click to expand...
 
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