High temp or high humidity during lights off

[Apalchen]

Okay so I'm going a little nuts here I ordered an AC and it's taking way to get here. I'm running my lights at night when it's cooler so there is no issue during lights on. But my lights off temps today are 80+ degrees as it's hot here today. If I run the dehuey that makes it even hotter, if I don't run it the humidty climbs. I'm on week 3 of flower and just stripped my plants. I have put so much I to this grow like literally my life savings and I can't afford to lose the crop.

I know that neither chocie is ideal but need help deciding if higher lights off temps or high humidity is worse.

@Renfro @diggs99 not sure u guys have ever dealt with this but would like to get your opinions.

 

[Renfro]

I wouldn't worry about the lights off being that warm, in fact since it's dry outside rn I have my room B, the one with lights on at night, pulling air from outside to dehumidify when the lights are off. It will automatically kill the blowers and switch over to AC/dehus/co2 when the lights come on. So today my rooms lights out temp is 83 - 85F. The humidity is inline though at 38 - 45% (my setting) So fight the RH% IMO.

 

[Renfro]

Remember, that heat is sorta doing you a favor as when the air is warmer the RH% drops. So if that same air was cooler the RH% would be higher.

This chart lets you see how that works. Look at a temp and RH%, find the absolute humidity number and then go to a different temperature and find the number closest to that AH number and see what the RH% is.

 

[Apalchen]

Man I'm so relieved to hear that your lights out temps are that high I have been so worried. I couldn't find anything about high lights off temps, so I'm glad to hear that you have experience with it I've been stressing all day so I'm gonna go get baked and jump in the lake or something.

 

[diggs99]

I dont have much to add, everything i know came from @Renfro, so id only be regurgitating the same words only sound dumber lol

 

[Ladiesonly]

@renfo if I clip my fan when lights off my humidity is 90%. I don't do it I run the fan. My humidity with fan on high no lights is 56%.

Im looking to add a dehumidifier, I have a 5x5 and 4x4 but 4x4 is veg. Can I get by with a 50Pint?

 

[diggs99]

@renfo if I clip my fan when lights off my humidity is 90%. I don't do it I run the fan. My humidity with fan on high no lights is 56%.

Im looking to add a dehumidifier, I have a 5x5 and 4x4 but 4x4 is veg. Can I get by with a 50Pint?

His name is mispelled in the tag....easy way to do the @ is to type in the first few letters and then wait until the RIU drop down with the list of names appear, then just click the name your looking for.

@Renfro ....tagging you for the poster above.

 

[Renfro]

Im looking to add a dehumidifier, I have a 5x5 and 4x4 but 4x4 is veg. Can I get by with a 50Pint?

hmmm, so you are exhausting your tents outside? or are you recirculating using the room the tents are in as a lung room?

 

[Ladiesonly]

hmmm, so you are exhausting your tents outside? or are you recirculating using the room the tents are in as a lung room?

I exhausting out of house.

 

[Renfro]

I exhausting out of house.

Well a dehumidifier would probably have a difficult time keeping up with the air exchange.

 

[Ladiesonly]

Well a dehumidifier would probably have a difficult time keeping up with the air exchange.

Im running my ac fan on the house all the time, I think its circulating humidity. I turned that off. I had it set that way for crypto miners.

Honestly, my plants are large in 10 gallons most of my 5x5 is full 3 plants . Im worried pushing 55% fan is in High zone on knob.

its passive intake tent thinking of dehumidifying room that is attached to tents as a lot of air is sucked from there. Possibly use two.

Im just nervous with humidity and worried It will ruin the buds

 

[s1044]

Air Conditioning lowers humidity. The hot air and water vapor in your home is ejected via the outdoor condenser unit and drain line, respectively.

 

[Apalchen]

I've successfully vented and used a dehuey it might seem like a waste and it guess it would be if was sitting right under your exhaust, but a 70 pint def helps drop my numbers to an acceptable level from 70 percent or so down to 50 percent. Although now that my plants are putting off more humidty I'm about to throw another one in there.

@Renfro so how high have you run your lights off temps I'm out shopping now for something that will help either a portable or converting a window unit as it's supposed to be 92 here next week. Again temps drop at nite and that's when I run my lights so that temps not really am issue but I'm not sure about running 92 degrees lights off temp.

 

[Apalchen]

Since it's just temporary do you think freezing a few bottles of water and sitting them in front of fans would work? I dunno I hate to spend hundreds of dollars when I got a mini split on the way, btw I will never order from Ingrams again I ordered the 22nd and I still haven't received shipping confirmation just a bunch of run around when I call.

 

[Renfro]

@Renfro so how high have you run your lights off temps

Highest I have gone is 85F.

Since it's just temporary do you think freezing a few bottles of water and sitting them in front of fans would work?

For what purpose? To condense water? If so then how do you prevent the fan from evaporating the water as it's condensed? Some sort of collection container that the fan won't hit? Honestly I doubt it would help much but I could be wrong.

I've successfully vented and used a dehuey it might seem like a waste and it guess it would be if was sitting right under your exhaust,

Well it would seem like you are exchanging air you are trying to dehumidify. Perhaps if the fan kicked on when RH% goes above 50%, pulls it down a little and kicks off, the dehu is then slowing the rise...

You are just gonna have to play with stuff and see what works. So many variables like intake RH% (air that replaces exhaust).

 

[Apalchen]

I hate portable ac as they are never as strong as they claim. But does anyone think one would work for controling lights off temp in 12x24 room? They are roughly 400-500 dollars and kinda my last resort but I can't see it being okay to run 92 degree lights off temps so I guess it's about my only option til the mini split shows up. Also btu rating on them are really strange they have 2 btu listing for most units like the one at a local store said 10k btu I'm one rating and 5500 btu on another rating.

 

[sf_frankie]

I hate portable ac as they are never as strong as they claim. But does anyone think one would work for controling lights off temp in 12x24 room? They are roughly 400-500 dollars and kinda my last resort but I can't see it being okay to run 92 degree lights off temps so I guess it's about my only option til the mini split shows up. Also btu rating on them are really strange they have 2 btu listing for most units like the one at a local store said 10k btu I'm one rating and 5500 btu on another rating.

The higher number is the old way of measuring them. The new rating takes things like standby power consumed and heat created into account. If the high number and low number are hugely different then the unit is an inefficient piece of crap. My 10k btu has a doe rating of 6700k. It’s decent for a single hose and cools down my space quite well but I gotta pretty small windowless room that’s sealed well.