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Help with heat!

Puffaluffagus

Member
Veteran
This is getting ridiculous, almost 100 everyday in a state that's supposed to be 80 for the average temp right now.

It's supposed to get cooler by the weekend, but between now and then I need to get my lights on temps down.
They are hitting about 85 right now, and seem to be picking up a degree per day with this never ending heat, it just doesn't cool down at night now like it normally does.

Anyway, what I'm thinking of doing is shutting off the exhaust fan while the lights are on so the AC doesn't get vented out of the room so fast that it can't keep it under 80.
I figure I will get up once in the night and turn it on for about 10mn, and then shut it off again.
As soon as the lights go out I will turn it on for the dark time.

I would prefer low temps to constant fresh air if I have to pick one, and since it's only while the lights are on for the next few days till the heat breaks I can't think of any reason while it wouldn't work or any problems that would arise.
I know I won't be scrubbing the air so smell can build up, but it's just me in the house and the fan and scrubber will go right back on at lights out.

Am I overlooking anything?
Can anyone think of why this is not a good idea for a short term heat fix?

Once the hot spell breaks I can control the temps just fine, but for now it's starting to worry me.
 
T

TribalSeeds

how often are you exhausting while the AC is on now? Did I read that correctly?
 

Puffaluffagus

Member
Veteran
how often are you exhausting while the AC is on now? Did I read that correctly?

Exhaust fan runs 24/7 right now(constant)
Third summer in this room and its normally just fine with the exception of a few hot days each summer.
It's this extended hot snap that's beginning to mess with me.

It's a one speed fan, I thought about maybe throwing it on a timer so it comes on for one minute every 15 minutes or something, but I don't know if I have any timers I can set like that.
 
T

TribalSeeds

Your AC will run a lot more efficiently if you dont exhaust the cold air it puts out. Id either use an AC or a fan, but not both on all the time. If you want to exhaust the air every now and then thats fine, but if you're running an AC just get a dehumidifier and circulate air in the room though a scrubber.
 

Puffaluffagus

Member
Veteran
Your AC will run a lot more efficiently if you dint exhaust the cold air it puts out. Id either use an AC or a fan, but not both on all the time. If you want to exhaust the air every now and then thats fine, but if you're running an AC just get a dehumidifier and circulate air in the room though a scrubber.
That is what I have been thinking.
Kinda of a sealed room.
I have a dehuey going already as its a basement room, and the humidity in the summer is high.

I thought about disconnecting the exhaust fan ducting and just letting it scrub the room without venting outside.

I"ve always thought about sealed, but I'm not sure what all's involved with it.
Adding Co2 I assume, but I'm not sure what else.

Maybe I'll start a thread about converting a vented room to sealed, unless anyone wants to talk about it here, in which case I'm all ears.
 

señorsloth

Senior Member
Veteran
ya i hear ya brother, it's up there here as well, and my ac is out, i'm making do...but ya ive just learned to live with the fact that my buds will be putting up with some abuse this month...they seem too be holding up pretty well, considering it's about 90-100 in the cab from 6-10pm. i am considering changing my night hours to 8 to 8 or even 10 to 10, to help combat the heat, because 10 to 10 would in theory be colder than 6 to 6
 
What about just turning off your exhaust, running your a/c, adding co2 when the lights are on. Then when the lights go off, have the co2 and a/c shut off and the exhaust fans come on? You can do that with timers. I used to run a fully sealed room, but converted it to that setup and I get better results.
 

yerboyblue

Member
Maybe move the A/C to the side of the room that's not vented (if possible)? Or, a bigger A/C.
 
Last edited:

DeoXy

Active member
This mad heat in the midwest has been killer.. it started wayy too early and hasn't let up much..

A few things I have personally done that have made a difference was : invested in a dimmable ballast.. it's a 600w lumatek that can switch between 360w-400w and 600w using the same bulb, I lower it on days when it's the hottest and bump it right back up.. it helps a lot and doesn't seem to effect yield as long as it not left on a lower wattage for extended periods of time.

Another thing would be to run the 12 ON cycle during the night when its the coolest.. this might not b doable now as ur already in flower but just a suggestion for future hot summer grows. Also note that ac units and dehumid. give off heat during operation.. keeping them as far away from your grow space can help *some.

I personally have just dedicated these past couple summer months vegging out some new beans under T5's for the upcoming winter grow to save money on AC costs currently.. As I got tired of the $400+ per month electric bill for running all my grow equip. + a port ac + central air for the rest of the house.

Goodluck and I hope it cools off soon!
 

nukklehead

Active member
This mad heat in the midwest has been killer.. it started wayy too early and hasn't let up much..

A few things I have personally done that have made a difference was invested in a dimmable ballast.. it's a 600w lumatek that can switch between 360w-400w and 600w using the same bulb, I lower it on days when it's the hottest and bump it right back up.. it helps a lot and doesn't seem to effect yield as long as it not left on a lower wattage for extended periods of time.

Another thing would be to run the 12 on cycle during the night when its the coolest.. this might not b doable now as ur already in flower but just a suggestion for future hot summer grows. Also note that ac units and dehumid. give off heat during operation.. keeping them as far away from your grow space can help *some.

I personally have just dedicated these past couple summer months after harvesting my past crop in may vegging out some new beans under T5's for upcoming winter grow to save money on AC costs.. As I got tired of the $400+ electric bill for running all my grow equip. + a port ac + central air for the rest of the house.

Goodluck and I hope it cools off soon!


:yeahthats thats what my partner did... problem was his lights off cycle was during the day. Being from where you are I m sure you are aware of old coal rooms in a basement. During harvest I told him it was most important to get the temps down during lights off which he didnt do. Temps stayed stable days and nights 80 give or take and I think his quality suffered. Good advice above. Midwest is taking a beating right now. May be best to sit it out and veg as above till cooler temps. IMHO during lights on in flower you can push 90 but when lights are out and nearing harvest you ve got to get those temps down to mock mother nature or you will suffer.
"This to shall pass"
peace
 

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