I have the wire with the sensor running into the cab. In the cab there's a 150 hps and a 4 inch fan blowing right under the bulb . It will be blowing on the top of the plants when I get some. I also have a computer fan for exaust at the top of cab and vent holes at the bottom of cab. When I read the lcd display on the hygro farm thermometer it says around 85 degrees inside then I press outdoor and it says 103 degrees. There is no way its that hot in the house. Am I reading it wrong is the outside actually showing the temp inside? I can put my hand to the glass on the 150 hps and it doesn't burn my hand.
reading hygro farm thermometer
- Thread starter grokillaz
- Start date
rasputin71
Well-Known Member
'outside' is where the wire/sensor tip goes, so yes, your grow cab is 103 degrees when closed.
I forgot to mention the cab is five feet high and the exaust is almost at the top of cab and the light is about two feet high off the bottom of cab. If I was to install a 4 inch fan just above the light for an exaust fan that should help right? Btw these are 4 inch velocity fans from target and were very cheap but they seem to work better than computer fans which I've used with success in the past but with cfls. If I can't get the temps atleast 85 degrees I might just have to pop some satori beans to start with since they handle heat well. I went with the hps with built in ballast because its more stealthy and now I'm paying the price. Main thing nobody notices shit when they come in the room.
I was thinking what if I just put a fan directly on the light and ballast itself with the fan facing right at an exaust fan next to it that should take out a lot of air right? Or would it just be better to make computer fan intake, one 4 inch fan for exaust and second 4 inch fan for tops of plants? I actually bought a 4 inch inline fan a week ago but I could not get it quiet enough even when I hooked up ducting to a scrubber and bought a fan controller. The fan contrtoller slows the fan down so it doesn't sound like a vaccuum but it causes it to humm loud which won't fly. Wasted money sux
I'm about to give up on this and just throw in some cfls. Installed another intake fan on front of cab and a bigger and stronger exaust fan. It's a bigger computer fan that is pretty damn powerful. When I installed it and had it on I started taping around it I accidently hit the fan with my finger and it cut my finger open , doh!. Temps are in the low 90's now . I don't really want to add anything else. Should I expect crappy yields? What if I did a diy co2 thing wouldn't it help? Help please
Ok. Your thermometer has two readings. One is built inside the lcd unit, that is your Indoor temp. The probe that you put inside your box is the outdoor temp.
If your outdoor temp is 103 your plants are dying, quickly.
Your option is to get a 4 or 6" fan with temp sensor and set it around 76 degrees. Vent that outside.
Also put the probe at the same height of the plants, and under the light if possible that gives you a good reading.
A grow room can be 103 up top and 60 at the bottom, cold roots-burnt tips see?
How far is the light from the plant tops?
If your outdoor temp is 103 your plants are dying, quickly.
Your option is to get a 4 or 6" fan with temp sensor and set it around 76 degrees. Vent that outside.
Also put the probe at the same height of the plants, and under the light if possible that gives you a good reading.
A grow room can be 103 up top and 60 at the bottom, cold roots-burnt tips see?
How far is the light from the plant tops?
Gonna start them a foot away then train them as they grow bigger and hopefully when they finish they will be about 5 inches away.Don't have any plants in it yet but as soon as I can keep temps good my buddy will gift me some. Plus I got some beans I could pop that I ordered a month ago. Installed the inline fan and if anybody says anything about the noise ill just say neighbors installed an new ac. Just a small humm coming from closet. I think the problem is my closet itself doesn't have enough ventilation. So I'm just blowing hot air around. Am thinking of just running the lights on at night since I will be only flowering in here. is low 90's still too hot? I tried a bunch of different ways but finally got a computer fan as intake, 4 inch table fan blowing on bulb, opposite of that fan I have a duct that is attached to the inline fan sucking it out through top of cab. I'm hoping this will work. Temps are steadily at 90 which is still high . Not much more I can do without risking the grow . I really should of dished out more dough for a better fan and scrubber. This shows that u get what you pay for.
Temps outside cab is usually 85 degrees or near that. It has a built in ballast , I wanted it to be stealth I know it will make it harder to keep cool but I had nowhere to put ballast. I have holes in the bottom of cab for passive intake and a small computer fan pushing in air but I think my problem is that the cab itself is in a corner nook of a closet so there is walls on three sides of it. The back of the cab is about 5 inches away from wall . I'm sure the passive intake in the backwall is pulling in air from a bad spot in my closet that doesn't get any fresh air so I'm gonna make a hole in the front bottom of cab and have the passive intake their using ducting that runs out of cab and closet into room thus pulling in fresh air from my room . If that doesn't work then I'll just run it in the 90's and try my hand at mandalas satori . Read some great reviews from ppl running rooms with high temps and that specific strain.
zem
Well-Known Member
no intake fan needed, by putting both fans as exhaust you will be better venting than if you had one intake and one exhaust. those little computer fans are not enough i guess, maybe 2 of them may do the trick. anyway, if it's 85 outside, it's sounds about right to be 90 inside. the side where the cab has holes especially the exhaust must be venting freely not blocked by walls
secretweapon
Active Member
If you cant get those temps down and if your on a budget you might look onto a Stanley blower. I picked up 2 of them for 40 bucks a peice at amazon.
Here is a link to the mod icmag.com/ic/showthread.php?t=29341
Here is a link to the mod icmag.com/ic/showthread.php?t=29341
The two exaust fans is a great idea. Plus i've decided on turning lights on at night cuz temps were like 75-80 . I'm configdent it will work. Just wish inline fan wasn't soo loud. This morning I turned my room fan off and that fan was pretty damn noticeable. Atleast with two exaust running I can turn the big fan off during dark period and let that little fan exaust so the noise issue will be only 12 hours.
zem
Well-Known Member
yeah lol everyone i know has lights on at night. it's so basic that i didn't think of suggesting it. i never ever had my 12/12 room light in daytime, more heat issues. the loud fan working with your light timer is a great idea, i think you've solved your lil problem there
