Small dehumidifier recommendations?

[I'mback]

It's a 3x3 tent. His entire house is a big lung room. Exhausting to the outdoors at this time of year is overkill and a huge waste of money, he'd be heating his home only to blow it all outside.

Sorry, his entire set up or what numbers he is after is nebulous. AFAIC there is no need to drop to 40% during bud. If your environment is controlled e.g sufficient air exchanges a clean growing room, you are not spritzing your canopy, like I have heard recently, you should not have a mildew issue.

I personally like 75 deg & 55% RH for flowering and 60-65% during the vegetative phase.

Wrt wasting heat, really??? A lung room if used should have its own micro-climate separate from the house, which mine has.

I have forced hot air htg, so. Regardless of the den temperature, the furnace is set off with the temperature from the "living spaces".

If you learned your lessons well, your gear will be paid for in a couple to 3 runs and, outside of cost (electricity) to run your grow, what you grow, cost pennies on the dollar, compared to both BM and dispensary costs.

I remember when folks started vaping and used to kick at spending $500 yr, when they were spending $3-5K previously. Umm???

 

[I'mback]

I'm trying to get away without venting outside, I know not ideal. I figure the air from the window cracked and under the door might be enough.

I may change my mind though and have to construct some sort of mount for the window (I'm using 6 inch ducting).

Haha I'm trying to post once or twice a day. I've been meaning to PM you aswell about mainlining next round. ( doing 2 grows this winter, too hot in summer).

Give me a few to 10 days and I'll be in your inbox lol.

What is spurring such a debate is your inadequacy to post your known environment, stating where you are having issues etc... and a way to rectify them.

Your post is nebulous at best. What is your goal e.g temp and RH?

• What equipment do you have on hand for your grow;
  • temp and RH controllers
  • exhaust fan size
  • how do you raise humidity in your tent?
• What do you know about VPD; and
• Where are your numbers lining up on the chart.
• What is your environment at lights on, lights off? (temp/RH)

Some folks would have you think that, because it is a weed, you simply pop beans in soil and you are golden. Not so! There is a learning curve and it is only as steep as you make it.

Control your environment correctly and you will be handsomely rewarded.

Harlequin day 52 Flower (click to enlarge).

 

[Cdnguy]

What is spurring such a debate is your inadequacy to post your known environment, stating where you are having issues etc... and a way to rectify them.

Your post is nebulous at best. What is your goal e.g temp and RH?

• What equipment do you have on hand for your grow;
  • temp and RH controllers
  • exhaust fan size
  • how do you raise humidity in your tent?
• What do you know about VPD; and
• Where are your numbers lining up on the chart.
• What is your environment at lights on, lights off? (temp/RH)

Some folks would have you think that, because it is a weed, you simply pop beans in soil and you are golden. Not so! There is a learning curve and it is only as steep as you make it.

Control your environment correctly and you will be handsomely rewarded.

Harlequin day 52 Flower (click to enlarge).

[URL=https://www.icmag.com/ic/picture.php?albumid=80491&pictureid=1995558&thumb=1]View Image[/URL][URL=https://www.icmag.com/ic/picture.php?albumid=80491&pictureid=1995559&thumb=1]View Image[/URL]

I'm pretty sure I have my answer and going to try to get away with as follows or tweak it along the way in flower (borrow a dehumidifer or such).

I'm working with a cool bedroom (2 windows) 10x10ish with closet, with one electric base 4 foot heater on a (dial) thermostat (hard to adjust precisely).

I have a 3x3x6 Tent with a 6 inch vortex fan (speed controlled low to medium speed) sucking/venting from the outside of tent through a carbon filter to control odor, and I have 2 screen vents at bottom of tent to let the recirculated air come back in.

I have a CAP Controller Atmospheric controller however the temp outlets are not working anymore so I just have it exhausting 24/7 (recirculating air).

I'm using 2 , 240W LED's ( Actual draw 135W Each ).

I've got the tent with heater kicking on and off, and lights on at 24C-26C during lights on, and no lower than 19.5C-21.5C at lights off, with heater on almost all the time. That's the best I can do with my room in the winter.

Humidity is staying pretty close to the same day and night around 45-53 percent.

 

[Cdnguy]

Plants look good, that's alot of bud!

 

[I'mback]

I'm pretty sure I have my answer and going to try to get away with as follows or tweak it along the way in flower (borrow a dehumidifier or such).

OK with this added info I believe we can get somewhere

I'm working with a cool bedroom (2 windows) 10x10ish with closet, with one electric base 4 foot heater on a (dial) thermostat (hard to adjust precisely).

There is a difference between tweaking and adjusting e.g a pinch vice a spoon measurement! Tweak son, you are fine tuning, not setting Laymen's terms! You don't give a damn (more or less) of your bedroom temp. You adjust that temp for the tent temp, finding a happy medium between lights on and lights off. As I previously stated, "it is a happy medium" between the 2, or you can adjust for each. For me, I find that happy setting and will adjust my VPD accordingly. Far too many people get wound up around % RH or whatever. That is why there is a chart to suit all environments!

I have a 3x3x6 Tent with a 6 inch vortex fan (speed controlled low to medium speed) sucking/venting from the outside of tent through a carbon filter to control odor, and I have 2 screen vents at bottom of tent to let the recirculated air come back in.

??? Are you sucking via a charcoal filter to feed your tent, or is your tent under a charcoal filter exhausting outside of the tent?

I have a CAP Controller Atmospheric controller however the temp outlets are not working anymore so I just have it exhausting 24/7 (recirculating air).

please clarify.

I'm using 2 , 240W LED's ( Actual draw 135W Each ).

Nothing really wrong with that. I was running a 600w and installed a 2nd 600w. That created a whole new bunch of issues. IMHO, the proper light for a 3x3 is 900W

I've got the tent with heater kicking on and off, and lights on at 24C-26C during lights on, and no lower than 19.5C-21.5C at lights off, with heater on almost all the time. That's the best I can do with my room in the winter.

???

Humidity is staying pretty close to the same day and night around 45-53 percent.

You do know that in Canada, relative RH in the winter is around 30% at best, and that although we need to de-humidify in summer, we have to humidify in winter, to a minimal of 45-50% RH. In Nova Scotia in the past 2 weeks we have seen 28-32% RH. My tent sucks from the den. Therefore, it is receiving air @ x RH, regardless of what it is outdoors.

So, my advice is not to try and control your entire home but the plants home.

I went from a 600W Meizhi to 2 600W Mizhi. I came to find out that I only really need 900W. I had a heat issue, running through a 190CFM fan, it was insufficient and my tent was pressurized because I was bringing cold air in via a cool air inline fan from the window via the A/C which doesn't run during winter. During summer, said AC is set to cool the basement. Let's clarify... a 10x15 room and a 9x9 room.

Because I have forced hot air heating, and the tent pressurized, the whole house smelled like my tent. <---- read my tent was venting e.g my exhaust fan wasn't removing the supplemental cooling air I was providing.

I have a calculator to figure out the size of fan one needs etc... I didn't want a 6" fan because the smallest one is 440CFM, WAAAAAY more than what my girls need. Long and the short of it, after retrofit, I had to make a damper for my exhaust line. That damper is 100% shut odd e.g at 90 degrees to flow. That being said, if you look at dampers (dampers with sleeves) there is roughly a 5/16-3/8" gap around the damper. It is not a flow stopper, but a restrictor. I wish I would have found a 225-250CFM fan, that is all I really needed.

You also never mentioned if you have a "humidifier" in your tent. There is no way you will get the same RH at lights on and lights out without one. As temp rises, RH goes down. As temps cool RH goes up. During lights out, it is not uncommon to hear the "tent" de-huey from cutting in. This is normal. You can speed up your fan to compensate. Sometimes you may be able but, most times you need both to adjust. You increase fan speed= less humidity, but also less temperature inside the tent.

My tent is hooked up to both. A humidifier and an old de-humidifier I had. The 2nd de-humidifier we are talking about is for "my" environment" not the tent. I suck from the top and originally was exhausting into the bottom, which was causing my temps to rise and subsequent low RH. Having the air from the tent (although it defeats the AC, discharge via filter on top of the tent. That dialed that sucker in.

Right now outside environment is 53 deg F and 99% RH. Indoors is 71 deg and 35% (my tent sucks from indoors). I cannot make up RH with ambient conditions. A comfortable RH for homes is between 45-50%. Very hard to accomplish with low "ambient RH". At this present time, I can get close to my # but I am replenishing my humidifier 3 times a day <--- unsat. Therefore, extrapolating the data, I need to raise "the room" RH, where the tent gets it supply from.

You need to isolate each problem individually and remedy them as a whole.

In closing, I had to close off my air inlet (from outside) with a cap, because my fan (oversized, not by choice) is sucking cold air in.

 

[I'mback]

Plants look good, that's alot of bud!

1st time doing the technique. "manifold". It is akin of having a 3/4 supply line in your house (water) while having a 1/2" take off to each task. I will know whether I will pursue this avenue after this grow or not.

The guy that came up with this technique was brilliant. "Every one of them colas" receive the same amount of nutrients as the next. Not so in conventional growing, where the lower branches get fed 1st. I don't have lower branching (that's all cola). You may want to argue that lower buds get fed 1st and you would be correct but. they don't feed nearly as much as the top buds do, and in doing so, there aren't taking away from the main colas. They only drink as much as they are hungry/thirsty. The proof will be in the pudding. Yield! I will revisit my position after this grow. BTW the buds you saw are of the size of a Mc Cormick spice bottle, and hard as a rock :wink: more or less.

 

[Cdnguy]

OK with this added info I believe we can get somewhere

There is a difference between tweaking and adjusting e.g a pinch vice a spoon measurement! Tweak son, you are fine tuning, not setting Laymen's terms! You don't give a damn (more or less) of your bedroom temp. You adjust that temp for the tent temp, finding a happy medium between lights on and lights off. As I previously stated, "it is a happy medium" between the 2, or you can adjust for each. For me, I find that happy setting and will adjust my VPD accordingly. Far too many people get wound up around % RH or whatever. That is why there is a chart to suit all environments!
??? Are you sucking via a charcoal filter to feed your tent, or is your tent under a charcoal filter exhausting outside of the tent?

please clarify.

Nothing really wrong with that. I was running a 600w and installed a 2nd 600w. That created a whole new bunch of issues. IMHO, the proper light for a 3x3 is 900W

???

You do know that in Canada, relative RH in the winter is around 30% at best, and that although we need to de-humidify in summer, we have to humidify in winter, to a minimal of 45-50% RH. In Nova Scotia in the past 2 weeks we have seen 28-32% RH. My tent sucks from the den. Therefore, it is receiving air @ x RH, regardless of what it is outdoors.

So, my advice is not to try and control your entire home but the plants home.

I went from a 600W Meizhi to 2 600W Mizhi. I came to find out that I only really need 900W. I had a heat issue, running through a 190CFM fan, it was insufficient and my tent was pressurized because I was bringing cold air in via a cool air inline fan from the window via the A/C which doesn't run during winter. During summer, said AC is set to cool the basement. Let's clarify... a 10x15 room and a 9x9 room.

Because I have forced hot air heating, and the tent pressurized, the whole house smelled like my tent. <---- read my tent was venting e.g my exhaust fan wasn't removing the supplemental cooling air I was providing.

I have a calculator to figure out the size of fan one needs etc... I didn't want a 6" fan because the smallest one is 440CFM, WAAAAAY more than what my girls need. Long and the short of it, after retrofit, I had to make a damper for my exhaust line. That damper is 100% shut odd e.g at 90 degrees to flow. That being said, if you look at dampers (dampers with sleeves) there is roughly a 5/16-3/8" gap around the damper. It is not a flow stopper, but a restrictor. I wish I would have found a 225-250CFM fan, that is all I really needed.

You also never mentioned if you have a "humidifier" in your tent. There is no way you will get the same RH at lights on and lights out without one. As temp rises, RH goes down. As temps cool RH goes up. During lights out, it is not uncommon to hear the "tent" de-huey from cutting in. This is normal. You can speed up your fan to compensate. Sometimes you may be able but, most times you need both to adjust. You increase fan speed= less humidity, but also less temperature inside the tent.

My tent is hooked up to both. A humidifier and an old de-humidifier I had. The 2nd de-humidifier we are talking about is for "my" environment" not the tent. I suck from the top and originally was exhausting into the bottom, which was causing my temps to rise and subsequent low RH. Having the air from the tent (although it defeats the AC, discharge via filter on top of the tent. That dialed that sucker in.

Right now outside environment is 53 deg F and 99% RH. Indoors is 71 deg and 35% (my tent sucks from indoors). I cannot make up RH with ambient conditions. A comfortable RH for homes is between 45-50%. Very hard to accomplish with low "ambient RH". At this present time, I can get close to my # but I am replenishing my humidifier 3 times a day <--- unsat. Therefore, extrapolating the data, I need to raise "the room" RH, where the tent gets it supply from.

You need to isolate each problem individually and remedy them as a whole.

In closing, I had to close off my air inlet (from outside) with a cap, because my fan (oversized, not by choice) is sucking cold air in.

Sorry it took so long for reply, I've been trying to get my post counts up so I can PM you but that hasn't been happening.

I don't know how to quote your questions like you did my answers.

As for the charcoal filter I am sucking air from outside the tent through the fan then blowing into the charcoal filter into the "lung room". The fan is located on the top of charcoal filter facing down into it. I have a 6 inch duct line about 5 feet coming from the tent into it if that makes sense. Just want to control odor and get air movement.

For the environmental controller, actually the temperature gauge doesn't work not the outlet, so I can use it for humidity but I just have humidity set so low that the fan runs all the time.

I have my fan on a speed controller and I don't have a humidifier I used a bucket of water and dialed my fan right down in veg to get about 45 percent humidity- I know a little low for veg.

Not to sure about vapor pressure deficit I'll have to read more into that.

Thanks for your information.

Right now I'm sitting at 20.4C, 50% RH (Lights off) . and its -20 outside with 60% RH however I have all windows closed in lung room anyway. I dialed up a bit with my heater the last few days and it seems to be working out.

 

[Cdnguy]

1st time doing the technique. "manifold". It is akin of having a 3/4 supply line in your house (water) while having a 1/2" take off to each task. I will know whether I will pursue this avenue after this grow or not.

The guy that came up with this technique was brilliant. "Every one of them colas" receive the same amount of nutrients as the next. Not so in conventional growing, where the lower branches get fed 1st. I don't have lower branching (that's all cola). You may want to argue that lower buds get fed 1st and you would be correct but. they don't feed nearly as much as the top buds do, and in doing so, there aren't taking away from the main colas. They only drink as much as they are hungry/thirsty. The proof will be in the pudding. Yield! I will revisit my position after this grow. BTW the buds you saw are of the size of a Mc Cormick spice bottle, and hard as a rock :wink: more or less.

You should have started a grow diary. I'm interested to see how it works out for you. I have Dinafem Critical 2.0 seeds I am doing next.
Let me know. I should have 50 posts soon.

 

[I'mback]

Sorry it took so long for reply, I've been trying to get my post counts up so I can PM you but that hasn't been happening.

I don't know how to quote your questions like you did my answers.

Simple my friend you simply place [ quote ] at the start of the sentence and [/quote ] at the end of the sentence. Make sure you get rid of the space between the brackets and the word.

As for the charcoal filter I am sucking air from outside the tent through the fan then blowing into the charcoal filter into the "lung room". The fan is located on the top of charcoal filter facing down into it. I have a 6 inch duct line about 5 feet coming from the tent into it if that makes sense. Just want to control odor and get air movement.

Gotcha! Known as a passive intake. You are exhausting your tent via charcoal filter. The negative pressure inside the tent, sucks air through your vents.

For the environmental controller, actually the temperature gauge doesn't work not the outlet, so I can use it for humidity but I just have humidity set so low that the fan runs all the time.

I have my fan on a speed controller and I don't have a humidifier I used a bucket of water and dialed my fan right down in veg to get about 45 percent humidity- I know a little low for veg.

The bucket will help some, read some. You do need a humidifer in your tent.

Not to sure about vapor pressure deficit I'll have to read more into that.

Thanks for your information.

In a nutshell, short strokes. VPD allows you to adjust a particular environmental condition, in relation to a condition you have no control over. Providing the relationship/ratio of temperature and RH are maintained within the prescribed settings you are still golden. That being said, some Sativas may not like growing at lower temps or Indicas at higher temps for that matter. If that is the one you are having difficulties with <--- example only. Therefore, you will have to adjust your RH for "that" temperature.

Right now I'm sitting at 20.4C, 50% RH (Lights off) . and its -20 outside with 60% RH however I have all windows closed in lung room anyway. I dialed up a bit with my heater the last few days and it seems to be working out.

Cool beans I see you are now sitting at 50 posts. Congrats!

 

[I'mback]

You should have started a grow diary. I'm interested to see how it works out for you. I have Dinafem Critical 2.0 seeds I am doing next.
Let me know. I should have 50 posts soon.

Here ya go
https://www.icmag.com/ic/album.php?albumid=81581

 

[teflon_don]

I dont see how investing in controlling your environment and having consistent humidity is such a big issue? You get what you pay for, spending a little to improve your setup will only give you better smoke!

Get something from costco or homedepot so you can easily return it incase it fails. Most of them come with a built in pump these days.

Ive used Honeywell and Freiderich dehums with great success, auto restart!