Do I need temp swings? Or keep steady temp

DrDukePHD

DrDukePHD

Well-Known Member
Ok so I've got a 400w oil heater & an Inkbird set to 79F in my 4x4 (with a temp trigger of +/- 3 degrees). Meaning it'll be 79/80.
then slowly drop to 75F before going back up to around 80F.

Can I just keep it on that setting 24-7?

Or do my night/lights out temps need to be lower?

Thanks!
 
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CaliRootz88

CaliRootz88

Well-Known Member
Just found this chart on Google.
I’ve heard often that you should try to avoid having temp swings more than 10 degrees difference between highest and lowest period in a 24hr time to avoid potential issues.

CDBE3A7F-99A8-4DAB-B50F-E42F5F663588.jpeg
 
Star Dog

Star Dog

Well-Known Member
During peak summer i get near 25/26c 24hrs that's when they grow really vigorous.

Given the option in 12-12 I'd rather cool things down at night to 19/20c, the reason is I'd rather they were slowed down at night, all my mega stretch phases have been during the summer periods, sometimes as much as 2" in 24hrs.
 
PadawanWarrior

PadawanWarrior

Well-Known Member
DrDukePHD said:
Ok so I've got a 400w oil heater & an Inkbird set to 79F in my 4x4 (with a temp trigger of +/- 3 degrees). Meaning it'll be 79/80.
then slowly drop to 75F before going back up to around 80F.

Can I just keep it on that setting 24-7?

Or do my night/lights out temps need to be lower?

Thanks!
Click to expand...
They'll be fine with equal temps. The plants prefer it a little colder at night but it won't matter too much. The problem is when night is warmer than days for too long. They can handle it fine and will limit the stretch but you don't want to do it more than a few weeks. It's called negative temperature differential. Lots of people think it's bro science until they actually try it. A little stretch is good, but it's a nice trick to know.
 
lusidghost

lusidghost

Well-Known Member
I'm not sure if they actually prefer colder temps at night. It's just what naturally happen and keeping the temp stable throughout requires more energy. I remember hearing either Harley Smith or Bugbee talk about positive experiments of reversing the swing to where was warmer during the dark period.
 
ProPheT 216

ProPheT 216

Well-Known Member
If you control the air around the tent keeping a small room at 70-72 f and let the tent draw that air in with good exchange you'll be fine. The air going in comes right back out. Temp might appear higher in the tent but most of that is actually surface temp readings. Air is exchanged fast enough to keep actual air temps down.
 
speedwell68

speedwell68

Well-Known Member
I aim to keep mine at a constant 25C. That coupled with good airflow and the humidity will sort itself out. Try to avoid swings of more than a few degrees. I had a battery fail in my SmartLife temperature sensor, it have given me a low battery notification and I forgot to change it, so when the temperature outside went from +12C to -3C in a few hours, my heater didn't switch on and the plants went into shock. I fucked them up good and proper.

I swapped the battery and the heater started to work again, luckily I was in veg and the damage was minimal. Once I sorted it they quickly bounced back.
 
LeastExpectedGrower

LeastExpectedGrower

Well-Known Member
speedwell68 said:
I aim to keep mine at a constant 25C. That coupled with good airflow and the humidity will sort itself out. Try to avoid swings of more than a few degrees. I had a battery fail in my SmartLife temperature sensor, it have given me a low battery notification and I forgot to change it, so when the temperature outside went from +12C to -3C in a few hours, my heater didn't switch on and the plants went into shock. I fucked them up good and proper.

I swapped the battery and the heater started to work again, luckily I was in veg and the damage was minimal. Once I sorted it they quickly bounced back.
Click to expand...
Since I live in the land of sub-zero (F) temperatures in the winter and swings that can be 60 degrees in a few hours, I use a duct damper on my exhaust. When temps drop and air pressure changes, it's possible to get cold air pushed down the duct from outside...so the duct damper stops any inward flow, especially during lights-out.
 
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