Too Much Heat...

[Weed4Life]

The temps in his room were getting in the 90's until he added an ac. But because the room encapsulating the grow room is getting too hot.

My friend is having a problem with heat. He is running a hybrid system. 250w HPS, 7 -50w Corn cob full spectrum LED's with an air cooled hood. He is only running a 200cfm (4") exhaust/carbon filter to outside the plywood room. The problem is this, the grow room is built inside a converted patio/living space in back of the house. The walls are thin (foam with metal on each side) We live in the south east states. The only air is from a 1300 btu ac in the converted living space. That was not cooling sufficiently so he installed a 5000btu ac into the grow room to help the temps. it exhausts in the main room. I told him to some how ventilate the back room, but he is afraid because the babies are stinky since the heat brings the smell out and he doesnt want neighbors to know. He is a medical patient.
He has a 8" inline fan with a carbon filter in the middle of the converted room.

The babies are on week 6 of flowering.

He is using FFOF potting mix, FF Trio nutes, FF micro nutes and tap water that has sit out for 24-48 hours. He only ph's the water when he feeds. He feeds every other day. So, he feeds, waters, waters, waters, feeds, etc. He has had no problems with the health of the Purple Haze's from ILGM. He also has a couple fans on the inside to move the air. They get watered 1-2 time a day, half a gallon of water each, each time. I will post pics if needed.

So, how can my friend properly ventilate the converted living space without jeopardizing his OP? He is being super paranoid about his neighbors and wanting no one to know. With the ac cooling the grow room (8hrs of ac), the tempos are still hovering in the 80's.

 

[hotrodharley]

Ventilate into the home's main vent and exhaust through the roof. It is the vent for the sewer. Nobody will know.

 

[bankheadstoner]

Ventilate into the home's main vent and exhaust through the roof. It is the vent for the sewer. Nobody will know.

First things first you have to focus on the problem and that's where he going wrong. The heat source is the light so he as to draw the heat from the light not the room . See drawing heat from room not stopping the problem because the light will continue to to throw off heat and getting hotter thru out the day . But if the light was cooled then the ac would be able to cool the room
Step1 exhaust the heat coming from the light using the 8" intake fan and set the ducting directly at the 250w hps and put the carbon filter between the light and fan
Step2 I'm not sure the setup but the ac should cool the room after he directly vent the hps light. If the ac is outside grow room then get another intake fan and some ducting and run the ducting from the AC to the grow room and the intake fan will help push the AC cool air .but if the ac is inside the actual grow and can't cool the grow room then focus all your energy into venting that hps light which is the main heat source
If you not using a grow tent then think about getting one because the advantage of a tent is being able to control a specific grow space instead of a big ass room
Good luck in venting that room . A good way to control temps is getting a ( cooling thermostat controller) and plug in the cooling source which would be your air conditioner so if temps get to high the thermostat turn air conditioner on
Hope this info help

 

[Weed4Life]

Hotrodharley, the main room is an addition and cannot be vented or cooled due to its design. His house has a flat roof for the back room his grow box is in. Theres a window air(13000btu) for the converted room that the box is built into. There's three windows and a door as well. I have heard of bad stories of people venting into the open attic. there are two intake fans on bottom, a 200 cfm 4" exhaust pulling air through the cool tube from the carbon filter and out through the roof of the box. He does not run both ac's as that's expensive. I thought maybe the 4" is too small especially since he has ducting, the cool tube etc. I know he did some math but then he built this room after his first tent failed to hold up. Most tents online had really mixed reviews and they seem cheap. He is thinking of adding another light, but a store bought LED to take addition plants on. Double up.

He was thinking of doing a similar setup to what he has now, but needs to figure out the heat deal. The babies look great, no real sign of heat stress. They are pretty looking. So, your saying increase his exhaust and that will pull the heat off the light more efficiently and cool the room better? So, the outer room temp doesn't matter? I know he was thinking of upgrading the exhasut, but the babies look happy even though its warm. He just wants them to bulk up and he has read quite a bit about temperature range.

 

[1212ham]

They get watered 1-2 time a day, half a gallon of water each, each time.

Why water 1-2 times per day? I believe once every day or two is normal for soil. What size pots, stage of growth? BTW, I have an ipower tent, no complants.

Hotrodharley is talking about the sewer vent, aka stink pipe, it goes out through the roof, doesn't vent into attic.

 

[Lucky Luke]

90s are doable, a few of us see 100f's

Airflow, airflow, airflow.
If the plants are drinking heavily then make sure you cut the feeds back. Easy way to get problems is to feed at normal strength.
Run lights at night where possible.
large juice or milk bottle filled with water and frozen near a fan or intake helps, not much but some.
4inch ducting is small I run 6 (but I can duct out)

He has three options.
Put up with it.
Bigger AC
Outside vent.

If the plants are looking good then......

 

[Tfunk0704]

The temps in his room were getting in the 90's until he added an ac. But because the room encapsulating the grow room is getting too hot.

My friend is having a problem with heat. He is running a hybrid system. 250w HPS, 7 -50w Corn cob full spectrum LED's with an air cooled hood. He is only running a 200cfm (4") exhaust/carbon filter to outside the plywood room. The problem is this, the grow room is built inside a converted patio/living space in back of the house. The walls are thin (foam with metal on each side) We live in the south east states. The only air is from a 1300 btu ac in the converted living space. That was not cooling sufficiently so he installed a 5000btu ac into the grow room to help the temps. it exhausts in the main room. I told him to some how ventilate the back room, but he is afraid because the babies are stinky since the heat brings the smell out and he doesnt want neighbors to know. He is a medical patient.
He has a 8" inline fan with a carbon filter in the middle of the converted room.

The babies are on week 6 of flowering.

He is using FFOF potting mix, FF Trio nutes, FF micro nutes and tap water that has sit out for 24-48 hours. He only ph's the water when he feeds. He feeds every other day. So, he feeds, waters, waters, waters, feeds, etc. He has had no problems with the health of the Purple Haze's from ILGM. He also has a couple fans on the inside to move the air. They get watered 1-2 time a day, half a gallon of water each, each time. I will post pics if needed.

So, how can my friend properly ventilate the converted living space without jeopardizing his OP? He is being super paranoid about his neighbors and wanting no one to know. With the ac cooling the grow room (8hrs of ac), the tempos are still hovering in the 80's.

Brotha I literally have like 10 fans going I’d tell him to do the same. Also paint everything and I mean everything white. It helps so much. Oh and also if you can get the ballast out of the same room if possible. Good luck bro

 

[Weed4Life]

His plants look great! I know it's all about canopy temps. I recommended that he needs to get a temp monitor to check the canopy temp. I know he raised his lights up a bit just to keep that temp a little lower. He has a 250w HPS in a cool tube, with 8-50w full spectrum china LED's surrounding the exterior of the canopy. Its janky but it works. He wired it all himself since he is an apprentice electrician. I was just over there yesterday and his ballast is outside the room. He frequently opens the back door and exhausts hot air/intakes fresh air into the converted room every so many hours. Temps were staying around 84. I will let him know maybe a 6" will pull more heat away and out of the room. He was looking at doubling efforts, but using an LED this one:

King Plus 1000w LED Grow Light Double Chips Full Spectrum on Amazon. Its $119. Plenty of reviews


Plus what he is running now but modified with the 6". Will this be sufficient for another two babies? He super cropped them all except one, which will happen soon. He is buying time for the current ones to finish in two weeks. The girls are so happy!! MAybe he is good

 

[bankheadstoner]

His plants look great! I know it's all about canopy temps. I recommended that he needs to get a temp monitor to check the canopy temp. I know he raised his lights up a bit just to keep that temp a little lower. He has a 250w HPS in a cool tube, with 8-50w full spectrum china LED's surrounding the exterior of the canopy. Its janky but it works. He wired it all himself since he is an apprentice electrician. I was just over there yesterday and his ballast is outside the room. He frequently opens the back door and exhausts hot air/intakes fresh air into the converted room every so many hours. Temps were staying around 84. I will let him know maybe a 6" will pull more heat away and out of the room. He was looking at doubling efforts, but using an LED this one:

King Plus 1000w LED Grow Light Double Chips Full Spectrum on Amazon. Its $119. Plenty of reviews


Plus what he is running now but modified with the 6". Will this be sufficient for another two babies? He super cropped them all except one, which will happen soon. He is buying time for the current ones to finish in two weeks. The girls are so happy!! MAybe he is good

Led lights heat are alot better than a hps but the led gives off heat also . But I would probably buy 2 600w instead of a1000w led if he plan on adding more plants because he would get better coverage . I'm not sure if the seeds are feminized but if they are then going into flower at 84degrees can be risky due to hermaphroditic strains that most seedbanks are selling . But if he have regular seeds he should be good .
Also at the top of the canopy if he put a big enough fan that will control the temp alot better at canopy height.
But if temps stay high then maybe he don't need hps or led and instead buy a t5 light . They seem like the worst option but they actually are great especially the 6/8 tube t5 lights work just as good as a regular led light( maybe not as good as a cob led tho but def about the same as a typical Led light like the king plus). One thing I would recommend for the t5 is what ever stage the plants are in use the specific color spectrum for that phase . So for veg only use the blue t5 bulbs and flowering use red and the plant will love it and that will give him way more then the 4 degrees lower . And should take him from 84 to 78 guaranteed

 

[Weed4Life]

I did notice when his lights were off the temp was lower, but it was also at night. He is undecided about the extra light yet, but he was thinking of upgrading to a 6" inline to pull the heat out better. Also, he has a decent size fan that stays constant on the canopy that blows the heat away. It is on all the time.

 

[Weed4Life]

Brotha I literally have like 10 fans going I’d tell him to do the same. Also paint everything and I mean everything white. It helps so much. Oh and also if you can get the ballast out of the same room if possible. Good luck bro

He has mylar all around, but needs to update the other areas since its cheaper than paint. I get why you paint everywhere, the light bounces. his babies look like some of the pics I seen on this site. He did SCROG, but let them fill the screen too much and they stretched a lot in the third week into flowering and are about 2 feet above the screen. The canopy levelness is close but it could be better. The fourth new baby was SC yesterday and I saw her today and she was down trodden. She was SC last night so I thought she would've already bounced back like the others did. Her genetics looked a little off, more wide leaves and stunted a bit; but that could be from topping, maybe. I've read that Sativa's are better for higher temps. He was going to try Amnesia Haze soon maybe his third round.