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My stealth cabinet
- Thread starter dansbuds
- Start date
Cool cab ! I'm working on a smaller one.
CF Group specs the filters for maximum of 80 degrees F: http://www.canfilters.com/canfilters_33.html . I'm sure the 9000 is the same.
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http://www.canfilters.com/faq.html
What is the Maximum Temperature/Humidity I can run my filter at?
The maximum recommended temperature that you can run your filter at is 80 Degrees Centigrade, and as soon as your start rising above 70% humidity, the water molecules in the air start to get stuck in the carbon pore structure and slowly diminish the life of the filter.
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I guess 80 F is a bit conservative as many have grows hitting 85-90, but that's the spec, for rated life. I think high temps impacts the life mostly, but effectiveness may suffer also.
Try a thermometer on the part of the filter closest to the light. With sufficient airflow temps might not be so bad.
CF Group specs the filters for maximum of 80 degrees F: http://www.canfilters.com/canfilters_33.html . I'm sure the 9000 is the same.
---
http://www.canfilters.com/faq.html
What is the Maximum Temperature/Humidity I can run my filter at?
The maximum recommended temperature that you can run your filter at is 80 Degrees Centigrade, and as soon as your start rising above 70% humidity, the water molecules in the air start to get stuck in the carbon pore structure and slowly diminish the life of the filter.
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I guess 80 F is a bit conservative as many have grows hitting 85-90, but that's the spec, for rated life. I think high temps impacts the life mostly, but effectiveness may suffer also.
Try a thermometer on the part of the filter closest to the light. With sufficient airflow temps might not be so bad.
yes my fans ...including the whisper quiet exhaust fan i use for scrubbing are very quiet thats why i picked them . i tested out a few different fans before buying these . they came from Kmarts of all places & they are in the electronics section by the computers . they are a computer USB connection fan with a 120 volt adapter so you can also plug them into the wall outlet . brand name oceanaire .
hope this helps dude .
R
redeyesurprise
If you read that closely you'll see that can states the high temp is 80 degrees Centigrade. That's 176 degrees Fahrenheit.
At 60% RH at 78-80°f my carbon filters effectiveness is noticeably diminished.
Hold Alt and type 248 to get the ° symbol
Smiley
Hold Alt and type 248 to get the ° symbol
Smiley
Good catch ! You are right. I wonder if that is a mistake on their part. Do you know otherwise ?
I emailed them today, haven't heard back yet, hopefully I can get to the bottom of this.
CF Group is an American company and pretty much their whole site is in Imperial so I'd bet that's a mistake.
I googled "carbon filter maximum temperature" and get some hits mentioning temps around 35-40 C, and some around 70 C, made differently I guess, so who knows for these filters ?
i thought i read here somewhere thats its better to pull through a filter than to blow through it .....as far as efficiancy goes . negative pressure instead of positive pressure .
so if i was to put my filter outside the cab ...maybe on top or in the back ....i'd be drawing air from the room & blowing it out through the filter reducing its efficiancy or leave it in the cabinet & let the heat & humidity affect it .... reducing the efficiancy ????
which would be the lesser of two evils ?????
yes .... no ??? lets hear some opinions from the experts ..... please .
so if i was to put my filter outside the cab ...maybe on top or in the back ....i'd be drawing air from the room & blowing it out through the filter reducing its efficiancy or leave it in the cabinet & let the heat & humidity affect it .... reducing the efficiancy ????
which would be the lesser of two evils ?????
i think i'd control or lessen the temps inside my cab if i pulled from the room & blew through the filter that was outside the cabinet rather than just scrubbing the recirculating air inside the room.
yes .... no ??? lets hear some opinions from the experts ..... please .
finally got my ignitor today ..... so i'm testing the temps in the cabinet now . was at 73.5 degrees with the lights off & no circulation fans going so we'll see later .
on a side note ..... decided to go hempy in the cabinet for a couple reasons . one bieng the friggin root aphids !!!!! i had to throw out my SD moms cuz i found out to late that was my problem & they nearly killed them completely . i grabbed a few cuttings off them before disposing of them & thought i got rid of them in my orange kush mom but NOPE !!! they're back !!!! DAMN !!!! i dosed my OK mom with some Bayer tree & shrub & put an 1 1/2 layer of perilite on top of the soil so we'll see how that goes . & secondly temps in a single container of hydro (2 gallon ) are going to be a real PIA to keep cool with out a main rez . so i decided hempy was the way to go .
this should be taking off real soon here .... got 1 SD clone rooted & put into mini 16oz hempy cups just waiting on the OK clones to root .... let them veg for about 2 weeks then going 12 - 12 right after .
will get some pics up tomorrow .... gotta get some batteries for the digi cam .
on a side note ..... decided to go hempy in the cabinet for a couple reasons . one bieng the friggin root aphids !!!!! i had to throw out my SD moms cuz i found out to late that was my problem & they nearly killed them completely . i grabbed a few cuttings off them before disposing of them & thought i got rid of them in my orange kush mom but NOPE !!! they're back !!!! DAMN !!!! i dosed my OK mom with some Bayer tree & shrub & put an 1 1/2 layer of perilite on top of the soil so we'll see how that goes . & secondly temps in a single container of hydro (2 gallon ) are going to be a real PIA to keep cool with out a main rez . so i decided hempy was the way to go .
this should be taking off real soon here .... got 1 SD clone rooted & put into mini 16oz hempy cups just waiting on the OK clones to root .... let them veg for about 2 weeks then going 12 - 12 right after .
will get some pics up tomorrow .... gotta get some batteries for the digi cam .
temps seem to be around 84.4 after 12 plus hours with all four lights burning . would like to get that below 80 if possible .... so gonna try a few things ......any suggestions ? i have a couple ideas but would like to hear what the pro's think .
007.
Member
What are your T5's going to be for? Underlighting? Veg lighting? Clones? I'm running a similar cab to your's but I'm planning on bringing in LEDs soon. I'm using 3 T5s hanging directly above my 4 seedlings now. Just moved them into hydroton netpots over the DWC today.
Also, when you read the source on scrubber efficiency that you quoted, they say that this is because where dust is an issue, the filtration being before the fan protects the fan from a buildup of dust particles, which would reduce its efficiency.
I don't see this being an issue in DWC. You should have filtration at the intake so you ensure your plants aren't effected by random environmental factors outside you cab beyond your control. Pests are one of the more major of those factors. Once you're in the cab (past the furnace or vent filter material you should have at the intake), you've just got bubbling water and plants. Then basically clean (but hopefully very very stinky) air through the fan and out the carbon scrubber.
In the wide variety of applications that carbon scrubbers have, sometimes the filter being first will make enough of a difference that it's worth going that way. But when you toss it right next to an HID light, I don't think that applies anymore. Just toss a filter-filled rubbermaid container on top of your cab with a hole in the bottom leading to your exhaust duct.
PS: 10 degrees over ambient, eh? What's the temp without the HID running? Maybe you need a cooltube to get it down further? Other than that, maybe some power on the intake? I've got a bathroom fan on the exhaust and a PC fan on the intake. The air just gets whisked right out of there, and temps don't change a half a degree with 3 T5s and a couple 26watt CFLs running, plus my fans and airpump. Obviously that's not the same as your HID light, but that's why I'm planning on running LEDs. So I don't need to deal with the heat or fire hazard.
Also, when you read the source on scrubber efficiency that you quoted, they say that this is because where dust is an issue, the filtration being before the fan protects the fan from a buildup of dust particles, which would reduce its efficiency.
I don't see this being an issue in DWC. You should have filtration at the intake so you ensure your plants aren't effected by random environmental factors outside you cab beyond your control. Pests are one of the more major of those factors. Once you're in the cab (past the furnace or vent filter material you should have at the intake), you've just got bubbling water and plants. Then basically clean (but hopefully very very stinky) air through the fan and out the carbon scrubber.
In the wide variety of applications that carbon scrubbers have, sometimes the filter being first will make enough of a difference that it's worth going that way. But when you toss it right next to an HID light, I don't think that applies anymore. Just toss a filter-filled rubbermaid container on top of your cab with a hole in the bottom leading to your exhaust duct.
PS: 10 degrees over ambient, eh? What's the temp without the HID running? Maybe you need a cooltube to get it down further? Other than that, maybe some power on the intake? I've got a bathroom fan on the exhaust and a PC fan on the intake. The air just gets whisked right out of there, and temps don't change a half a degree with 3 T5s and a couple 26watt CFLs running, plus my fans and airpump. Obviously that's not the same as your HID light, but that's why I'm planning on running LEDs. So I don't need to deal with the heat or fire hazard.
My t5's are under lighting the plants as they get bigger .
i took the can filter out of the cabinet & put it on top in the box that it came in with both ends open . have it hooked up so that the fan is drawing from the grow room & pushing through the filter . i know this will work cuz thats how i had it set up in my basemenet grow & worked great .
as far as heat goes .... i ordered 2 pc fans & will use them on the back of my cabinet as intake fans .... forcing air into the cabinet ..... should bring down the heat where i want it .
also remade the reflector ...used the one from my sunsystem hood that i took the 250 from ...seems to work alot better spreading the light out than the first one i made . will get pics up soon .
i took the can filter out of the cabinet & put it on top in the box that it came in with both ends open . have it hooked up so that the fan is drawing from the grow room & pushing through the filter . i know this will work cuz thats how i had it set up in my basemenet grow & worked great .
as far as heat goes .... i ordered 2 pc fans & will use them on the back of my cabinet as intake fans .... forcing air into the cabinet ..... should bring down the heat where i want it .
also remade the reflector ...used the one from my sunsystem hood that i took the 250 from ...seems to work alot better spreading the light out than the first one i made . will get pics up soon .
Smashed Hash
New member
Wow man, you have an awesome setup. Keep up the good work.
I want to see how you do the intake fans. I was first going to ask what you used for your passive intake.
I am trying to finish up my cab right now.
https://www.icmag.com/ic/showthread.php?t=191132
I am trying to finish up my cab right now.
https://www.icmag.com/ic/showthread.php?t=191132
for my passive intake i used 2 attic vents 4"x 8 " & put a black micro thin filter behind them before i installed them ..... just going to mount 2 pc fans on the back of my cabinet blowing in through the vents . gonna measure the temps with both running then just one to see where my temps wind up . not worried about it this time of year cuz winter is setting in here but summer temps are gonna be a bitch .
will get some pics up soon the digi still needs batteries
will get some pics up soon the digi still needs batteries
Strapped
Member
The actual CFMs that you need (minus the filter's air resistance) should be (total watts x 3.16)/ (temp change in exhaust desired). If you're using the 110 cfm fan you described, you should just need to upgrade your exhaust a little bit depending on the amount of resistance the can creates. I'll be interested to see if your pc fans help at all, but my gut feeling tells me that if your current fan is enough to exhaust the cab for an 11 degree change from ambient, your pressure might be high enough to spin the pc fans faster than the motor would be able to power them, and it wouldn't really do anything.
If you didn't want to buy another fan, I'd suggest running your 250 in a cool tube with one of the pc fans powering it, then using your blower to exhaust the cab air through the filter. Your passive intakes should be more than big enough to allow for adequate ventilation.
If you didn't want to buy another fan, I'd suggest running your 250 in a cool tube with one of the pc fans powering it, then using your blower to exhaust the cab air through the filter. Your passive intakes should be more than big enough to allow for adequate ventilation.
just taking the filter out of the cabinet brought my temps down to reasonable ,maybe it acted like a heat sink or something... dunno but right now my temps are near perfect ... 78.4 @ 40.2 % humidity with just the hps going 24 hrs . its at 80.1 with all the lights burning . but as i said earlier winter is setting in here .... the temps i'm worried about will be next summer .... i can address them then & wiil have the pc fans here when needed . but as you say they might not do any good just forcing air into my cabinet & may have to go with a cool tube (which gives me a few months to come up with another 135 $ ) or i may have enough harvest on hand by then to not even need to run my cabinet at all or i could even set up for an outdoor grow next summer ....options are open to me . but i do like to have things on hand to combat any issues i encounter ... not that i can prepare for everything lol . like the friggin root aphids they caught me way off guard !!! had me rushin to different stores to try & find the right chems .
right now i think i'm in pretty good shape as far as my enviroment in the cab goes ..... just waiting on my clones to root ( not having much luck there ...... just went from a bubble cloner which killed everything except one SD clone to the walmart ice cube tray cloner (my version ) . they've been in sence thursday & they're all looking good with alot of green to them so ......... got my fingers crossed . ) then i'll put them in the cab & let em grow ...
keep forgettin batteries for the damn digi cam .
and thank you strapped for that info on the air flow .... i knew there was an equation for it around here somewhere but couldn't find it .
right now i think i'm in pretty good shape as far as my enviroment in the cab goes ..... just waiting on my clones to root ( not having much luck there ...... just went from a bubble cloner which killed everything except one SD clone to the walmart ice cube tray cloner (my version ) . they've been in sence thursday & they're all looking good with alot of green to them so ......... got my fingers crossed . ) then i'll put them in the cab & let em grow ...
keep forgettin batteries for the damn digi cam .
and thank you strapped for that info on the air flow .... i knew there was an equation for it around here somewhere but couldn't find it .
Strapped has some good advise. You should reconsider the fans on the intakes. It can only be the cause of issues down the line. Positive pressure introduced into the cab or grow room is never a real good idea. Putting fans on the intakes isn't going to be the best bang for the buck anyway. I would consider increasing the exhaust "suck" instead of intake "blow". Any failures at all with the filtered exhaust, and the little fans at intake can blow funk out of every nook and cranny the grow has.
Your passive intakes should be plenty big. If the temps were in check with the carbon filter disconnected, then reconnect it and add exhaust fan pressure. (increase fan size or CFM)
Ever give dirt another whirl, try using 30ml 3% H2O2 with feedings and it should help clear the aphids out. It will help the plant roots with available oxygen as well. If I were to ever use "hempy" style buckets (certain I won't) I would make H2o2 a part of my feeds every time.
Your passive intakes should be plenty big. If the temps were in check with the carbon filter disconnected, then reconnect it and add exhaust fan pressure. (increase fan size or CFM)
Ever give dirt another whirl, try using 30ml 3% H2O2 with feedings and it should help clear the aphids out. It will help the plant roots with available oxygen as well. If I were to ever use "hempy" style buckets (certain I won't) I would make H2o2 a part of my feeds every time.
the filter is not disconnected its just after the fan on top of the cabinet .... it seems to have dropped my temps by removing from the cab & putting it after the fan . next summer if needed i may go with a cool tube instead of blowing air into the intakes .
as far as soil ... i had good luck with it but wanted to try hydro as in bubbler buckets but can't get my temps down in the buckets without iceing the buckets ....PIA . so after reading i decided on hempy buckets .and yes H202 will be a small part of my nutrient regiment .
as far as soil ... i had good luck with it but wanted to try hydro as in bubbler buckets but can't get my temps down in the buckets without iceing the buckets ....PIA . so after reading i decided on hempy buckets .and yes H202 will be a small part of my nutrient regiment .
