Tutorial Ventilation 101

[flylowgethigh]

One sensor pod finally stopped talking with the display module. For $27 for the set, and over 3 years, that’s OK with me. I was ordering another when the idea to post the recommendation came up.

I decided to run the dehuey last night to get the RH down. The dehuey heats the air too, so I wanted to be able to see the results as the night progressed, as I lay in bed in the other part of the house. The current run is half way through flowering and humidity is more important I think than cool temps at this stage to prevent mold. I liked the results I saw on the monitor.

During lights on the humidity and temps at the soil are several points different from the tops, but at night they are a lot closer.

 

[growsjoe1]

Thre years is better than I thought.

Thanks flylow. This will be a tool that I add.

 

[flylowgethigh]

I got another set of these cause the old #2 sensor pod quit working. The new #2 transmits on the same frequency and now I have 2 remote displays reading the tent info, and spare #1 and #3 pods. So one display in the lung room, one near my bed at night.

#1 is on the intake air filter, #2 is at soil height, #3 is at canopy height. I can see the air changing as it moves through the tent. This allows me to decide if the lung room or tent devices like fans or the light need to be adjusted.

 

[growsjoe1]

@flylowgethigh Those sensors add helpful info from particular areas of the grow. You have all the goodies to maintain an optimum environment: a humidifier, dehumidifier, good ventilation, a lung room, and proper lighting levels. Having made that effort definitely shows in your grows.

I was wondering. What controller are you using? If any, are you making adjustments based on the sensors?

I like being able to see how things like a Huey or dehuey, wall banger ac unit, space heater, etc… affect the steady state conditions without having to get up and go look during the night.

I got another set of these cause the old #2 sensor pod quit working. The new #2 transmits on the same frequency and now I have 2 remote displays reading the tent info, and spare #1 and #3 pods. So one display in the lung room, one near my bed at night.

#1 is on the intake air filter, #2 is at soil height, #3 is at canopy height. I can see the air changing as it moves through the tent. This allows me to decide if the lung room or tent devices like fans or the light need to be adjusted.

 

[CharlesU Farley]

My tent makes its own humidity because the leaves are transpiring. It can run 20 points of rh higher than the lung room. I distribute the incoming air at the base of the plants and suck it out at the top of the tent. The clip fans make sure the air inside the plants on all the leaves get good circulation.

All that water that the roots take up has to go somewhere

Here's what I do:

 

[flylowgethigh]

@flylowgethigh Those sensors add helpful info from particular areas of the grow. You have all the goodies to maintain an optimum environment: a humidifier, dehumidifier, good ventilation, a lung room, and proper lighting levels. Having made that effort definitely shows in your grows.

I was wondering. What controller are you using? If any, are you making adjustments based on the sensors?

Thanks. I only use a controller for the lights. It is a Growers Choice 2 channel. The fans are on constant settings to get enough airflow and balance the tent pressure. I try to keep the temp and humidity in the lung room as cool and dry as I can. If I can’t get the lung room cool enough then the light power is reduced. The goal is to keep the top temp sensor under 80*F, less is better. I screwed that up the other day and tric balls were hurt. There are 6 fans inside the tent, plus the two exit fans and the inlet fan air distribution.

I put a lot of effort into the water reservoir keeping oxygenated water at 73*F or so, at a 6.3-6.5 pH. It comes from the hot side of the tap.

 

[growsjoe1]

Thanks. I only use a controller for the lights. It is a Growers Choice 2 channel. The fans are on constant settings to get enough airflow and balance the tent pressure. I try to keep the temp and humidity in the lung room as cool and dry as I can. If I can’t get the lung room cool enough then the light power is reduced. The goal is to keep the top temp sensor under 80*F, less is better. I screwed that up the other day and tric balls were hurt. There are 6 fans inside the tent, plus the two exit fans and the inlet fan air distribution.

I put a lot of effort into the water reservoir keeping oxygenated water at 73*F or so, at a 6.3-6.5 pH. It comes from the hot side of the tap.

Yep, you pay attention to the details. I agree water temp makes a difference. Plants don't react well to cold feet.

On your recomendation I already ordered the

ORIA Indoor Outdoor Thermometer with 3 Wireless Sensors 30$, great buy.​

Should be here tomorrow...again thanks

 

[flylowgethigh]

You’re welcome. Take care of their environment and they will grow…. This will make me into an April fool.

 

[LndRcLvr]

Hello guys. Could any UK folk recommend a suitable carbon filter and fan combo to exhaust a 70cm x 70cm x 200cm sized cupboard grow ? I know it's going to be quite small.

 

[exploziv]

Something like a 4inch fan and filter kit from mars dimmed on low could work for that.
Or, if you want better quality, any other good brand fan that is at least 50 m3/h or 30 cfm + a filter that is over that rating in same flange size as the fan. I would get one that is higher capacity but has a dimmer or multiple selectablr speeds if possible.

 

[DARKSIDER]

Hello guys. Could any UK folk recommend a suitable carbon filter and fan combo to exhaust a 70cm x 70cm x 200cm sized cupboard grow ? I know it's going to be quite small.

I think exploziv has hit the nail on the head cant go wrong with that suggestion..