Mephisto Genetics Temp and humidity??

[SHRED]

I'm thinking one like this?

Home Dehumidifier, Powerful Small-Size Dehumidifier w/Auto Humidistat - Sleeping Mode & Touch Panel Control-Great For bedrooms, bathrooms, RV, Laudry or basements Approx 1200 Cubic Feet Amazon product ASIN B0734S7KR6

 

[Slater]

Well I was counting on my exhaust fan to lower the humidity so that in turn lowers the temp.
I have a less than ideal situation but it'll be okay I think.
Last grow was fine but I'm just trying to dial it in a little better.
Thanks!

you will surprised that your exhaust often doesn't extract as much heat as you may think or made to believe. It only replaces the air in the tent, stuff that makes heat stays hot and keep radiating to into the surrounding area keeping the environment at the same temp. At most your fan will only reduce by a couple of C unless the air is super cold that's been draw into the tent... A dehumidifier in a tent is point less en-devour as well, I've tried it, it makes little to no difference. Reason is you are replacing that air every few minutes / 30 secs depending on the fan, all your doing is sucking out the dehumidified air instantly. It never get chance to hang round to absorb the humidity.
What you need to do is control the environment around the out side of the tent. Where is your intake air coming from? can you control that air? where is your out take going?... Its a lot easy to do that than trying to control a small box of air that is exchange at a fast rate. My G'room is in my loft (attic) but I draw my air from my house, I can control that super easy, warm air in the winter and cool air in the summer... thats not to say I don't get Rh problems, got bud rot on my last grow.

 

[SHRED]

you will surprised that your exhaust often doesn't extract as much heat as you may think or made to believe. It only replaces the air in the tent, stuff that makes heat stays hot and keep radiating to into the surrounding area keeping the environment at the same temp. At most your fan will only reduce by a couple of C unless the air is super cold that's been draw into the tent... A dehumidifier in a tent is point less en-devour as well, I've tried it, it makes little to no difference. Reason is you are replacing that air every few minutes / 30 secs depending on the fan, all your doing is sucking out the dehumidified air instantly. It never get chance to hang round to absorb the humidity.
What you need to do is control the environment around the out side of the tent. Where is your intake air coming from? can you control that air? where is your out take going?... Its a lot easy to do that than trying to control a small box of air that is exchange at a fast rate. My G'room is in my loft (attic) but I draw my air from my house, I can control that super easy, warm air in the winter and cool air in the summer... thats not to say I don't get Rh problems, got bud rot on my last grow.

Great advice.
I pull from my garage so it's variable for sure.

 

[water farm]

I use one of the larger 'whole room' dehumidifiers outside of the tent, but in the room... so I apologize I don't have suggestions for running a dehumidifier inside the tent.

However, I also run an 11,000 BTU portable A/C that is outside of the tent, but in the room... I duct the cold air into the bottom of the tent... Both the dehumidifier and the A/C I have found to be priceless investments. I also use a cheap humidifier (like the kind mum puts in the baby room) as needed (during seedling/early veg, or when drying harvests in the tent if the humidity is too low, for example)

 

[Slater]

Great advice.
I pull from my garage so it's variable for sure.

excellent that's a great start... now you have to work out how to make a lung room in your garage... building a box lets say the size of the tent would be a good start. Put a heater, air con and dehumidifier in it all hooked up to thermostat controls.

 

[Slater]

Great advice.
I pull from my garage so it's variable for sure.

could you swap it all around and extract into the garage, then pull from the surrounding air around the tent. Would be a lot more easier to control that air... saves building anything, easier to just use the room the tent is in as a lung room

 

[SHRED]

could you swap it all around and extract into the garage, then pull from the surrounding air around the tent. Would be a lot more easier to control that air... saves building anything, easier to just use the room the tent is in as a lung room

I'm not sure I follow you.
It's a single car garage.
I'd think if I exhausted back into the garage it would build the humidity?
Anyways I just checked and it's 76F and 65% rh.

 

[water farm]

I believe what @Slater is saying is that it would not because you are now pulling air into the tent from humidity-controlled air in the room (instead of from un-controlled air in the garage) , and then exhausting warmer, more humid air into the garage (instead of the room)

 

[Simplicio]

Honestly if you struggle with your humidity being too high, then you should actually be raising your temperatures instead of dropping them. Higher humidity levels require higher temperatures to ensure the healthiest levels of transpiration. Take a moment and study a Vapor Pressure Deficit (VPD) chart, and see what it recommends to optimize the transpiration for your current humidity levels.
View attachment 828164
In veg I like to keep my VPD balanced right in the gold zone, and later in flower, I aim to be just to the right of the gold zone with slightly lower than recommended RH. I find this ensures a healthy level of transpiration, but keeps my garden free of the dreaded Botrytis (bud rot).
Once you balance out your VPD I often find that the plants help to control and balance their environment much more efficiently, and seem to grow themselves. Expect much better root growth, and overall vigor if you can find the balance. This chart was an absolute game changer for me to optimize my environment, and when it comes to killer yields, environment is EVERYTHING!
Hope this helps. Much love!

I follow this chart religiously, even in flower, get very nice growth (Mephisto Sour Bubbly approaching 5 ft tall), and never a hint of bud rot.
Temps in the high 70s, humidity upper 60s lower 70s during the whole lifetime.
But It's hydro, where pathogens are less worry.

 

[Slater]

I believe what @Slater is saying is that it would not because you are now pulling air into the tent from humidity-controlled air in the room (instead of from un-controlled air in the garage) , and then exhausting warmer, more humid air into the garage (instead of the room)

That be where I coming from