Chat

By continuing to use the website or clicking Accept you consent to our cookies and personal data policy. For details please see Privacy Policy

Grow QuestionsHumid and hot , how to manage ?

Humid and hot , how to manage ?

Spliffing_Aroundstarted grow question 2 years ago

How to manage temperature and humidity without ac in super hot and humid climate ? Will portable ac inside the box help ? The dehum doesn’t works correctly cuz of open air spots

Solved

Week 5

Setup. Ventilation

Sciolistic_Steveanswered grow question 2 years ago

depending on intake and exhaust situation you may have to climate-control entire sorrounding room to be effective. AC is your only option to control temps effectively... an exhaust can rarely changen it far from ambient temps. is it large enough for full room? if so, it'll function well... since you are likely changing air out one way o another from tent, it would need to be capable to cool entire room... could it work inside tent? maybe... as long as it can keep up ith what is exhausted from tent.. that would effectively increase "Volume" that it needs to cool. might be bit smaller than sorrounding room in that context, but not too much. RH might be controlled by exhaust, if exhausting to entirely separate area and the RH issue stems from transpiration of plants and not the ambient RH% in your region. if plants are the cause, then you need to get a dhum for sure as you can't pipe it anwhere if the origin is simply the plants in the tent transpiing... they gotta breathe to live and that will send out water vapor into local atmosphere. in both cases it's better to get somethign a bit larger than necessary -- it will run less and probably save watts overtime despite more watts used when running --- also, increases longevity with fewer hours of use per year. appropriately sized dehumidifiers add a lot of heat to the room... FYI. So, if you needed an AC before, it is even more necessary with a dehum. 30c is usualyl okay... you can combat higher temps with elevated RH to a point... you don't want to create an environment ripe for molds and microbial growth, though. (refer to VPD chart to see viable combinations of temp/RH% while staying under 65% is probably best for any mature plant - clones/seedlings is a different context and shot-term needs). But, while it may seem too warm, if oyu don't see symptoms related to heat, it's probably okay. 30C as a max is a guideline, not a rule written in stone.

1 like

Complain

Selected By The Grower

gottagrowsometimeanswered grow question 2 years ago

Dehumidifiers do not work inside a tent if you are using your an exhaust or any intake in air. As it completely defeats the purpose of lowering the RH inside your tent when you are sucking/or pulling in air from outside your tent. You'll be best setting up an exhaust. Or trying to raise the co2 levels in your grow room/,tent try keep tent/room sealed. You can use a dehumidifier outside your tent while keeping temps down using an exhaust but you need a really powerful one. I use a meaco, (was a little pricey) but it helps me drop my RH as low as 40-45 with many plants. Obviously the less plants, you'll have less leaf evaporation. Also if you can pick a few pour points on your substrate and not have the whole top of it soaked it'll drop it from drying out. Things like this this will help with your RH The co2 though will be your best bet to solve your RH/TEMP but you'll need the lights to match it. Also if you are using leds with drivers. You'd be surprised at how much lower your temp will drop if you lower the % of the light by 5% or have a fan blowing directly on your driver. This should help with the temp by atleast a few c. Good luck pal.

1 like

Complain

Shemshemetanswered grow question 2 years ago

Tricky situation, full sympathy. Surprisingly dehumidifiers can still make a difference, even when your venting huge volumes of air - but they add a ton of heat when it's really humid. Portable air conditioners sound good, but for many design reasons are a poor choice - difficult to filter, leaks odor. I'd only consider a split system personally. If your not running your lights are night, that's the quickest solution to bring the heat down a bit - enough for the dehumidifier to become viable again? Dim the lights back a bit. Consider buying a fan/light controller than can dim the lights if the ventilation can't keep up still. Consider running weekly ClO² treatments to knock back anything pathogenic. Circulate as much air as possible, without causing leaf damage. Run strains/tested phenos that are mold resistant. 😀 Measure temperature at the leaf; depending on light source it will be a few degrees cooler than the surrounding environment due to transportation. You can pull decent results at 29°C.

1 like

Complain