help help help humidity problems please help

good evening guys realy need help

grow room size roughly 5x3 feet
brick built
height of room approx 8ft tall
growing 2 bubblegum
1 cheese
1 white widdow
1 blueberry
have cold air coming in and have carbon filter attached to tt 150 fan sucking out hot air from room in to next room which goes out the roof was going in to sewers but need bigger pipe.
temp is roughly 75- 85 humidity sometimes goes over 60 and sometimes 75 f which is way to high why please help

how is the cold air coming in

get all water out of the room. make sure you have plenty of air in there. i had the same problem but i was in a closet. i got all the water out and put a bigger fan to suck out the air. and it came down to 30%. can you put a vent in the ceiling to suck air out?

if.I.grow.it.theywillcome said:

get all water out of the room. make sure you have plenty of air in there. i had the same problem but i was in a closet. i got all the water out and put a bigger fan to suck out the air. and it came down to 30%. can you put a vent in the ceiling to suck air out?

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Limit water and get a fan problem solved

Hi i have took a brick out and put a 7 inch foil tube with a fan on sucking the air from outside in to the room i also limit the amount of water i use to feed but have noticed latley my leaves are drooping which says to me they need more water soon as i give more water the leaves return to normal the humidity goes down to comfort which is around 40 -50
i have fans in my room a big fan sucking hot air out of room which goes in next room and out the roof
i have small fan sucking cold air in
and a fan that rotates to push air around the room and no matter what i do nothing works thnaks widdow