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dehumidifier that lets you exhaust heat?

Devilman

Active member
Do you run A/C during lights on? if so... its acting just the same as a dehuey in terms of lowering R/H, its one of the fundamental principles of their operation... why do you think so much water gets dumped out of the drain line from an A/C?


Also... just because you might think your room is designed correctly and mine isn't.. consider that geographical location and climate have a LOT to play on that too, as does grow method.. If you live somewhere with low RH most of the year and grow in something soil-like, chances are you will have a lot less issues at all, than someone who lives in a high humidity location, growing hydro drip trays (or E&F) where a lot of extra evaporation occurs during lights-on.
 

Coconutz

Active member
Veteran
Do you run A/C during lights on? if so... its acting just the same as a dehuey in terms of lowering R/H, its one of the fundamental principles of their operation... why do you think so much water gets dumped out of the drain line from an A/C?


Also... just because you might think your room is designed correctly and mine isn't.. consider that geographical location and climate have a LOT to play on that too, as does grow method.. If you live somewhere with low RH most of the year and grow in something soil-like, chances are you will have a lot less issues at all, than someone who lives in a high humidity location, growing hydro drip trays (or E&F) where a lot of extra evaporation occurs during lights-on.

Again... that all falls under designed properly.
If you live in an extremely wet environment and you are having issues running drip you havent designed your room properly to your environment.
Yes, my ac runs during lights on.... Thats the point and its also why I dont run a dehuey during lights on.
You would never exhaust the treated air from the AC, so why would you exhaust the treated air from the dehuey?
The treated ac air will go through the dehuey and right out the fucking room!
Treeking... Dont listen to a fucking thing this guy says anywhere on the intwerwebs
I have weed to grow. No more time for trolls
 
T

TREE KING

Dude!
I dont run a dehuey during lights on because my room is designed properly!
Treeking... This guy is just fucking with you!

naa it makes perfect sense. the point is to get the water out of the air. if theres water in the dehu bucket than it did its job. i understand its creating negative pressure when you duct the heat out but id rather have it setup like this
 

Coconutz

Active member
Veteran
Yes. If theres water in the bucket the dehuey did its job on the air you just removed from the room!
All the air in the room is untreated by the dehuey until its exhausted from the room!
That means the dehuey isnt doing shit to the air actually in the room but suxking it out like an expensive fan!
It also sucks out all the AC and co2
Good luck
LOL
LOL
LOL
 

Coconutz

Active member
Veteran
I forgot treeking... Your room has an intake anyway!
You are already wasting your electricity so it doesnt really matter.
I have no idea why I bother!
LOL
 
T

TREE KING

maybe your right coconutz ive never tried it. if theres dry air out side i think it might work. if your in florida it wont work. who fuckin knows though ive never tried it lol. dont think i dont appreciate your help coconutz
 

Devilman

Active member
Its all relative to room design and environmental factors.. if you run sealed room, CO2 etc.. then exhausting the Dehuey externally would obviously be pointless and stupid, but if you already run fresh-air intakes etc... then there isn't really any difference to the air going out your exhaust fan or out through a dehuey...


And now, a confession... After having smoked far too much and spent far too much time working on A/C's recently, I was compelled to go take the casing off my Dehuey and thats when it struck me... like a slap in the face.

Granger, Coconutz, I owe you guys an apology... I was stuck with the ventilation schematics of A/C's in my head, where the hot and cold sides are seperated (The air going through the hot exhaust has not come "through" from the cold side).

TreeKing: Apologies, My aging brain conspired against me, These guys were spot on... Dehuey's move the air right "through" them, as such the hot air coming from the exhaust is not just "by product" as it is on an A/C unit.

If you were to exhaust the air from a D/H straight outside it would entirely render it useless, unlike on wall-mounted A/C units where the "hot side" is cooled seperately from air outside, and the air inside is just circulated inside, a D/H uses the air its "circulating" as its cooling aswell, so the air NEEDS to be returned to the room in order to have any effect, else you would simply be lowering the R/H of the air right before it leaves the room.

Apologies again for the conflict and miss-information, my aging brain was stuck on A/C mode :(
 

Devilman

Active member
Yeh lol, I started writing the first part of the reply about room design like 20 minutes ago, got as far as the first 3 lines and started to doubt, so went and pulled the top off one of my D/H's, That's when it hit me lol..

Just goes to show... should always check before giving advice... and don't smoke so much while working on A/C units.

Anyway... my bad, apologies all round
 

Coconutz

Active member
Veteran
God damn!
You scare me because I think you might actually be serious!
If you already run intake or exhaust you shouldnt be running a dehuey unless you smoke crack!
Good day sir!
 

Devilman

Active member
God damn!
You scare me because I think you might actually be serious!
If you already run intake or exhaust you shouldnt be running a dehuey unless you smoke crack!
Good day sir!

I am indeed serious. I'm a big enough man to admit when I'm wrong, I hate it as much as you when bad information goes out, its counter-productive for all, so I'm sure you can imagine the rather sour taste of the large slice of humble pie I'm eating right now :p

Apologies again :joint:
 
Ok here's a evaporator with out the condensing coil attached AKA air conditioner. the rest of the unit is sitting on top of the box!

picture.php




Here's a household dehuey with a heater core attached and chilled water removing the heat.

picture.php


I can't vent my dehuey out as I run a sealed room, nothing gets vented, EVER. The santa fe ductable units duct the heat right back in as well. The only advantage to ducting them in is space savings.

All of these units are refrigeration units. which one removes the moisture is irrelevant. I do agree it is more efficient to have one refrigeration unit running at a time. I wish my AC could remove all of the moisture my room produces. Maybe when I get that new split!

My new dehuey is simply an 8k btu window banger sitting on a shelf exhausting its heat right into the room. I just put a 1" hole in the bottom of it and attached a drain fitting. It out performs 2 70 pint units. I get almost 30 gallons in a 24 hr period.

the last is a condensing coil attached to a coaxial direct to liquid evaporator. This chills water. Or if reversed cools air and heats water. A water cooled air conditioner.
 

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Devilman

Active member
That heater core is a nice idea, how much difference does it make to your exhaust temps from the dehuey with the heatercore?
 

Granger2

Active member
Veteran
Devilman,
As is often said in my neck of the woods, "Too mush juana!" LOL. Peace, bro and I'm glad to see you're man enough to apologize. I kind of thought, "If this guy re-reads this stuff, it'll probably hit him."
Good luck. -granger
 
That heater core is a nice idea, how much difference does it make to your exhaust temps from the dehuey with the heatercore?


It could be made to remove 100% or even have a cooling effect. Just depends on the water temp going in. I don't currently use this since I now need the heat in the room to keep the AC running.

Coconutz is right, more lighting would also ad that heat, however this system nets more reduction in RH which I need when the room is completely full of foliage. I actually have enough light and when I'm not over packing the room to take advantage of the cooler temps it balances out nicely.

btw I think it was 30 bucks at auto zone.
 

Subcooled

New member
Dehu's control humidity, a/c's control temperature. Both must be used for grow rooms. A Subcooled dehu does not add heat to the room. It's a split-system, like an a/c. Self-contained refrigerant dehu's are powerful a/c's with the condenser coil located after the evaporator coil. This condenser coil reheats air after the evaporator has cooled and dried it.
 
N

noyd666

just looked those subcooled units up. ARTIC DRY unit delivers cold air like ac but is built to remove moisture, 15 ton about smallest I could find. they hire a lot of gear out.
 

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