Extraction off at night?

[THE BEAR]

My night time temps are around 21c~24c
Daytime 23c~27c
If I turn off the extraction fan at night my temps stay around 22c~24c,
Should I just turn it off at night time as its starting to get cold at nights now, or can someone adviseme on this?

 

[Phobos]

Hey mate, temps are important but also humidity. You got to check if the rh doesn't skyrocket when extraction is off.

 

[Harukisan]

My night time temps are around 21c~24c
Daytime 23c~27c
If I turn off the extraction fan at night my temps stay around 22c~24c,
Should I just turn it off at night time as its starting to get cold at nights now, or can someone adviseme on this?

What about air renewal? What about the smell issue?
I’m curious too, I’d love to be able to turn off at night, it’s super noisy.

 

[Phobos]

Air renewal is a mandatory point. For the smell it depends. Do you need to be discrete or not.

When I slept in the same room as my tent, my extraction was running 15mn every two hours, wich was not ideal in flower. So much noise in there... But when my plants were done, I missed that ventilation sound so much, I was used to it :smoking:Like if something was missing in that room.

Now I let my extraction run whenever plants needs it. I'm doing hydro so RH can go really high when lights are off (like +90% at night). Never had any budrot because of my small fans moving air, but I'm sure I loose on quantity.

If you can invest, there is an interesting conversation here : https://www.autoflower.org/threads/quiet-in-line-fan-european-edition.80162/#post-2337578 about silent vent.

 

[Django_TO]

My night time temps are around 21c~24c
Daytime 23c~27c
If I turn off the extraction fan at night my temps stay around 22c~24c,
Should I just turn it off at night time as its starting to get cold at nights now, or can someone adviseme on this?

Issues, RH and air movement and renewal. You need to kwow how is your RH

 

[THE BEAR]

Issues, RH and air movement and renewal. You need to kwow how is your RH

RH is around 60%, at the minute I have the extractor vent were ducting is closed half way so its not pulling out air too fast, my temps are now at 27c so I'm hoping tonight my temps stay around 23c, that's what I'm hoping for anyways lol

 

[THE BEAR]

Air renewal is a mandatory point. For the smell it depends. Do you need to be discrete or not.

When I slept in the same room as my tent, my extraction was running 15mn every two hours, wich was not ideal in flower. So much noise in there... But when my plants were done, I missed that ventilation sound so much, I was used to it :smoking:Like if something was missing in that room.

Now I let my extraction run whenever plants needs it. I'm doing hydro so RH can go really high when lights are off (like +90% at night). Never had any budrot because of my small fans moving air, but I'm sure I loose on quantity.

If you can invest, there is an interesting conversation here : https://www.autoflower.org/threads/quiet-in-line-fan-european-edition.80162/#post-2337578 about silent vent.

I'm not worried about the noise as I hooked it up to my bathroom ceiling extraction, so it just sound like the bathroom fan is on, its the temperature drop at night I'm worried about as using CFLs, I'm running autos on 24/7 light, day times perfect but night time it drops due to the outside temps being lower,
i will be getting a 600w HPS in a few weeks so I will have no trouble with heat then,

 

[Arthur]

Lights out is when I need the extraction running. Lights off rH spikes to 65 to 70%... with an extraction fan running I can keep it just under 50%. Higher rH during flower and you risk bud rot. Temp drops bring rH spikes. Also.. young plants with just a handful of leaves will not add moisture to the air like big girls in flower, they're moving a lot of water, and canopy density is way up.

72 degrees is fine for lights off. My lights out temps are always house ambient temp, overnight, my house is 68-72 degrees. Been running that way forever.

 

[Death The Cultivator]

Vapor Pressure Deficit VPD Calculator - Dimlux Lighting - The Best Grow Lights

Vapor Pressure DeficitCalculator Calculate both Room VPD and Leaf VPD automatically Just enter the value below to generate the VPD values for your room and your plants. You’ll need to know the room’s temperature, relative humidity, and the plant’s temperature. We recommend calibrating your...

www.dimluxlighting.com

Stay within those ranges day or night and you'll reduce the chance of PM

 

[THE BEAR]

Vapor Pressure Deficit VPD Calculator - Dimlux Lighting - The Best Grow Lights

Vapor Pressure DeficitCalculator Calculate both Room VPD and Leaf VPD automatically Just enter the value below to generate the VPD values for your room and your plants. You’ll need to know the room’s temperature, relative humidity, and the plant’s temperature. We recommend calibrating your...

www.dimluxlighting.com

Stay within those ranges day or night and you'll reduce the chance of PM

thanks for the chart, its an easy one to read, thanksyou