Exhaust fan question

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orderof159

Active Member

• Aug 17, 2011

• #1

hey there!
I have one question, does the exhaust fan need to work all the time? Or i can use it with digital thermostat, and turn off/on only when temperature is not ok?

 

MidnightJoker

Well-Known Member

• Aug 17, 2011

• #2

You can use a digital thermometer to regulate your fan. But, if you have your exhaust fan hooked up to a carbon filter, you will most likely want to keep it on all the time during flowering to keep the smell away.

 

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mrmadcow

Well-Known Member

• Aug 17, 2011

• #3

besides temp control, the plants need fresh air as well so if the fan is only running a few minutes every day, it could slow growth. I ran into that problem in a barn in winter a few yrs ago. in subzoero weather,the light kept the room at 70 so the fan never kicked on. a small vent at the top helped. heat rises so it drew in some air from the passive intake.

 

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orderof159

Active Member

• Aug 17, 2011

• #4

ok, how strong lamp did you had, and what size was your room? i will have passive intake also.

 

dannyboy602

Well-Known Member

• Aug 17, 2011

• #5

Since photosynthesis doesn't stop and the plants don't stop putting out waste O2 I keep my exhaust on most of the time.

 

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mrmadcow

Well-Known Member

• Aug 18, 2011

• #6

400 watt hps & 16 4 foot t8 floros in an insulated box 4x4x7 feet. it was sealed till I added the vent and was using 5 gallon buckets w/ soil. work kept me away for up to a week at a time so I rigged a timer & drip watering system up. i noticed slow growth after a few weeks of not checking often compared to growth when I could check daily. guessed it was air & added a vent.-it seemed to help.