Humidifier Reccomendations?

Nan's NookArchives : Grow Chambers : Projects : Humidifier tek : Humidifier Reccomendations?
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By William Hicks (Loki) on Monday, December 10, 2001 - 08:20 am:

I have a grow chamber just waiting for the cakes/casings, and I'm only really needing one more component: An ultrasonic humidifier. Just curious as to what someone would reccomend for a 100 cubic foot space, to keep it at a nice high humidity. Already have the clear hose attached in a hairpin config up the side of the chamber (six feet tall), and I'm pretty sure that aside from the hole for the hose, it's air tight. I'm obviously looking for a large output, large resivoir humidifier, I just don't know if there will be an issue with the humidistat shutting off the unit at say 80%. The humidistat is located within the unit, so as long as the unit is outside of the chamber it should give me almost constant output, yes no? I've also read about shorting out the humidistat, but can't seem to find any info on that either.

By plinkerdink420 (Plinkerdink420) on Monday, December 10, 2001 - 01:46 pm:

i got one from a local grocery store made by sunbeam for $20 and it works fine... i really don't think that there is any type of humidistat in there, but if there is it's not causing me any problems... i know the one that i got would be no problem with 100 cubic feet.. this puppy cranks out the humidity.. it only has a one gallon resevior, but i only have to fill it like once or twice a week

By Roc (Rochester) on Monday, December 10, 2001 - 01:55 pm:

I prefer the Koolmist over the ultrasonic. Big difference in cost to buy and maintain. Go to *Mart and buy a Kaz Koolmist imho.

By Cbee (Cbee) on Monday, December 10, 2001 - 10:05 pm:

Ya go for the Vicks edition Kaz humidifier.. Thats what i recommend, its got a nice big resoiver... ebay for 10 bucks

By Karna (Karna) on Monday, December 10, 2001 - 11:11 pm:

You should first decide whether you want to have cakes or casings in this chamber.
A cool mist can only keep humidity in the upper 90s in a small chamber such as a cooler or such. If you have a small chamber, use a coolmist, adjust humidity down and more air exchange when fruiting casings.
If you have a larger chamber, you need an ultrasonic for cakes
However, now your casings will fruit like shit.
If you have casings, you want to go with a cool mist or other filter/wick style humidifier, but your cakes will not respond favorably.
Weigh these factors when you buy.

By Chuck Dicey (Dirtywop) on Tuesday, December 11, 2001 - 05:04 am:

Hello Nookians...
In a genuine stroke of stupidity in WalMart the other day I went ahead and perchased an evaporative wick filter cool mist humidifier from Holmes, completly ignoring all advice otherwise. My original intentions being to attach 5/8" air hose to humidify a rubbermaid, I was wondering if there is anyway to rig it up, or is there something wrong with evaporative humidifiers? Should I grab the receipt and take it back? It was a pretty good deal and it's quite a trip back out to Wal mart.

thanks for the help and any comment are appreciated

By Nan (Nanook) on Tuesday, December 11, 2001 - 05:29 am:

It might help out a small grow room, but it is not going to humidify a grow chamber all by itself.

I would take it back, it's not a deal if it is not right for the job.

By Chuck Dicey (Dirtywop) on Tuesday, December 11, 2001 - 05:57 am:

not sure i know what you mean...
a small room but not a grow chamber?
It's only about a 1' 1/2 x 1' 1/2 x 3'

By Nan (Nanook) on Tuesday, December 11, 2001 - 06:02 am:

The humidity output of evaporative humidifiers is not 100% RH and there is no excess of moisture. If you had a grow room and added one of these units you might be able to boost your RH by a point or two... But it's not going to humidify a small grow chamber, it simple is not suited for this job.

Perlite and a hand mister is all you really need to get started. There is a lot of adjustment and setup debugging to get an ultrasonic or cool mist humidifiers to do the job properly.

By Chuck Dicey (Dirtywop) on Tuesday, December 11, 2001 - 06:08 am:

ok thanks nan
I'll take it back then
who needs sll those fancy shmancy contraptions anyhoo

By plinkerdink420 (Plinkerdink420) on Tuesday, December 11, 2001 - 06:13 am:


By nichobob judson (Junglistmonte) on Friday, October 26, 2001 - 06:36 am:

Aguy I know just finished his first batch of cubensis. It was slightly successful- small yield, due to a couple of houseguest at his house lately that prohibited giving everyday attention to the project. I talk to him, daily, trying to think of new things/teks to use. We have a GREAT idea that incorparates a humidifier, distributed among a couple rubbermaids, but it seems like all the "vets" on this page and others discard the idea of using a humidifier, due to its almost too efficient use.-
My question is this- To those who have SUCCESSFULLY used a humidifier-
How long did you have it on a day?
How many cubic feet was your terrarium?
How often did you fill your humidifier, how much was your humidifier resevoir?
Nan- you should start a Humidifier thread on your archives page

ALso- If you have a humidifier hooked up to an airtight chamber, do air exchanges automatically occur, by means of shooting back through the humidifier?

By frodus sudorf (Frodus) on Friday, October 26, 2001 - 07:12 am:

I'm using a rubbermaid container for my first time
with a cool mist setup
a friend is helping me (vetran)
i am getting ready to birth some cakes soon
i'm interested too

so far my container is 75 degrees and 92% humidity
holding steady for several days now with perlite in the bottom

By Karna (Karna) on Friday, October 26, 2001 - 09:52 pm:

I used to use a cool mist
on all the time
a small closet. about 3X5X4 or so
every four to five days. dunno the capacity about 2 gallons or a bit more.
worked great.

By Nan (Nanook) on Friday, October 26, 2001 - 10:04 pm:

Hey Karna! Missed you. Welcome back.

By Regular Expression (Xeger) on Friday, October 26, 2001 - 10:30 pm:

I'm a newbie who recently birthed 5 cakes and am using an ultrasonic humidifier. Three of the cakes are double-cased with the PF tek, kept in a plastic terrarium at 95% humidity and 75 degrees.

People advised me not to use a humidifier my first time, but I had one laying around, so I figured I might as well experiment.

It's been 60 hours since birthing, and all of the cakes are thick with the white fuzz that seems to be a precursor to pinning. The cakes which were not cased are pinning most aggressively on the surface, whereas the cased cakes (one can assume) are sending networks of mycelia up through the casing.

the most surprising thing is that two of the cakes already have primordia! One is sporting a 2cm long healthy-looking specimen who is fattening up quickly. The other has a shorter, thinner primordium which may abort.

I have also seen a few very tiny pins clinging to the sides of the cakes--one of them looks like it began growing upside down.

I can't really give you a comparison with using a sprayer, as this is my first time. But I am pleased with my results so far. I'll keep you updated.

By plinkerdink420 (Plinkerdink420) on Friday, October 26, 2001 - 10:31 pm:

i use an ultra-sonic and i like it alot(as opposed to perlite, too dirty and too much contamination)... i leave it on all the time and it seems to be working good... probably too good, but that's better than not at all... currently i am doing some renovations and am going to start experimenting with a timer soon... so when i do that i will post and let you know what i have discovered... my terrarium is a 12 cubic foot rubber maid.. i used have to fill it almost every day, but have made some minor adjustments so i only fill it like once every four to five days now... its got like a gallon resevior... anyways, yeah you DO need a hole in your terrarium to let the air exit, preferably near the bottom for the heavy CO2... but yeah.. i still have to fan my babies... although my humidifier does exchange air pretty good, i still seem to get "dead" air pockets... so yeah.. i wish you all the luck in your endeavors... if anyone has a good timing system for the humidifier... please post

By plinkerdink420 (Plinkerdink420) on Friday, October 26, 2001 - 10:34 pm:

i meant to say--- about the air exchange thing-- that you may still need to fan sometimes to keep a good supply of O2 in there..... i fan once before i go to work, once when i get home, and once before going to bed ..... peace

By Regular Expression (Xeger) on Friday, October 26, 2001 - 10:35 pm:

Oh! I forgot to mention--here is a link to one guy's success story, using PF tek and an ultrasonic humidifier. This is what motivated me to try the humidifier:

PF Tek Experience #2

If you plan on using an ultrasonic humidifier, heed his advice--especially the advice he gives about positioning the hose so that the mist enters the terrarium at the bottom. My mist comes in at the top and I have condensation problems sometimes--especially on the uncased cakes. Make sure your cakes are sitting above the bottom of the terrarium (I'm setting them on top of the jars they were colonized in.)

By Suckrpnch (Suckrpnch) on Saturday, December 22, 2001 - 06:56 pm:


I'm looking to start growing again and have used the pf tek with near perfect success. I've always used the perlite/fanning method with a heating pad underneath to take care of humidity, heat, and exchange. I've been considering changing methods to a cool mist humidifier and some other form of heat though. My problem is that everyplace around here (Walmart, Target, Super K, Meijer, etc) carries the same thing. I believe the brand is Westinghouse (I'm not sure though as its been a few days since I've looked) It comes in several sizes and all but for every humidifier setup I've seen, the 'output' looks to just be a slot that can easily be taped over. These all have what looks to be a big fan blowing the mist out with the water tank sitting beside it. How in the hell do I get these to work?? Am I just looking at these wrong? There is a Home depot that I havent looked at yet but its looking doubtfull.


By plinkerdink420 (Plinkerdink420) on Saturday, December 22, 2001 - 07:56 pm:

most pharmacies will have them this time of year.... there you may be able to find more of what you are looking for... if not, you could use dryer venting to attach over the exhaust and maybe taper it down to what you want with alot of tapin' and riggin'... check out humifier tek

By Nan (Nanook) on Saturday, December 22, 2001 - 08:32 pm:

Make sure you are not getting an evaporative humidifier... Basically a filter/wick with a fan blowing over it, they are not suitable.

Glad to see you can post, just read your mail

By Cragith Kilbonith (Kilborn) on Saturday, December 22, 2001 - 08:56 pm:

I head that the "Vicks Kaz Model v400" works great. Did we save any of greenweanies coolmist pics?

By Suckrpnch (Suckrpnch) on Saturday, December 22, 2001 - 10:37 pm:

Well... I just got back from the stores. Holmes is the brand I was thinking of. These are labled "Cool Mist Humidifiers" though by your description it almost sounds like an evaporative humidifier. I took one out of the box and checked it out. Looking down at the top there is the 'output' It looks like a cylinder shaped filter thing with a fan in the middle of it. The box says cool mist on it and I dont remember seeing the word evaporative anywhere, though I did see other evaporative, ultrasonic, and warm mist models. I might be able to rig it somehow but I'm gonna have to think for a while (sometimes I'm a little slow )

Also while out I checked for some Vermiculite. I had no problem finding this last time, now its nowhere to be found. Hopefully its just cuz its kinda the 'off season' around here??

By quote: (Quote) on Sunday, December 23, 2001 - 03:33 pm:

yeah, off-season is right. try the largest gardening supply store you can find.

By Suckrpnch (Suckrpnch) on Monday, December 24, 2001 - 07:46 pm:

I just found some vermiculite. It was at the last possible place I woulda thunk to look; the smallest, most run down local hardware shop. Kinda sucks since I drove through all kinds of Christmas traffic the last couple days looking for it. Oh well... I think I may have a solution to the humidifier thing though. I'll take pics if it works.. and I'll be sure to bitch a lot if it doesnt .

By quote: (Quote) on Monday, December 24, 2001 - 10:29 pm:

hey, well at least you're making progress!!
and yeah, this xmas traffic sux, i've been dealing with the same here, 20 minutes to move 1 mile.

By Kman (Kman) on Monday, December 24, 2001 - 10:42 pm:

Hey I got another cool mist humidifier question?
I have it setup to my rubbermaid container(4'x2'x10") via a 3" dryer tube about 4' long, any idea on how long I should or could run it a day? I was running 24hrs but a tiny bit of condensation was developong on the top of a couple of cakes

By plinkerdink420 (Plinkerdink420) on Tuesday, December 25, 2001 - 03:56 am:

i just added a couple of those big 2.5 gallon water jugs to the line to bring down the humidity and it works good... almost perfect... run it 24 hours a day and humidity stays roughly 90-92%... i guess it all depends on the humidifier what kind of lengths and how many reseviors you would need... some people use timers where the thing is only on for like 10 min. every three hours... just do some digging around here and i'm sure you will find some good ideas... there is alot of good info in the archives... merry christmas