whats your temp at canopy level?

[Truth]

In indoor spaces occupied by humans the carbon dioxide concentration will also reach a level higher than in pure outdoor air. Concentrations higher than 1000 ppm will cause discomfort in more than 20% of occupants, and the discomfort will increase with increasing CO2 concentration. The discomfort will be caused by various gases coming from human respiration and perspiration, and not by CO2 itself. At 2000 ppm will the majority of occupants feel a significant degree of discomfort, and many will develop nausea and headache. The CO2 concentration between 300 and 2500 ppm is used as an indicator of indoor air quality in spaces polluted by human occupation.

The current threshold limit value (TLV) or maximum level that is considered safe for healthy adults for an 8-hour work day is 0.5% (5000 ppm). The maximum safe level for infants, children, the elderly and individuals with cardio-pulmonary health issues would be significantly less.

note: the average outdoor co2 level is 300-600PPM

 

[Guest]

Truth have you ever taken a reading shorty after waking in a bedroom with the door closed?I have man and I sleep alone,close to 1400PPM.Maybe people are more sensitive than me,2000 plus PPMs has zero effect on me and always has.Higher than 1000-PPM will cause discomfort in 1 out of 5 people?I dont know bro,better safe than sorry but I dont want folks scared off.Once you get this thing right it changes everything,yield increases,finishing time decreases,its flippin beautiful!

 

[Guest]

Aw truth,wikipedia?I reasearch things too bro,and a lot of what I find is dead on,a lot isnt.This one about co2 from my experience anyway is incorrect,if 2000PPM effects most people adversely I'm a pretty abnormal person,and I'm not.Man I'd feel awful if someone got ill becuase they spent time in a 2000PPM atmosphere,I just dont think its going to happen.

 

[Truth]

maybe the group wasn't full of smokers

 

[Guest]

haha,you know the PPms in my backyard exceed 500 according to my cap when I set it up,I'm about 1/4 mile from a major interstate.I bet out in the country it is closer to 300PPM.I know co2 can be dangerous,and people need to know the stated parameters but I just think the actual danger is a bit overblown.I know in 6 years on these forums I'd have heard about someone experiencing co2 "poisoning",but it's something I've never run into and 2000PPM although slightly high is not out of the ballpark for co2 enrichment.God forgive me if I OD anyone on co2 but you cant fear something that if used right can make such a difference,it only took me about 4 years to be able to get it "right" too lol

 

[Guest]

Sorry I got involved. Tying up the thread is the last thing I wanted to do.

 

[fallenangel]

as i appreciate everyones comments , this thread was for temps ,, not levels of c02 .. lets try to keep it on track please.

 

[jantrit]

i had canopy temps of 84 F with a 400w maxi bright hps, two 9" fans and an 175m3/h extractor (not sure what that is in cfm somthign like 100 i think) the light was about 30" from the plants. This was in a 2.5x2.5 foot cab so i was running about 82 watts per sq foot or somthing.

 

[Guest]

O temps,no straying,bailiff whack his peepee.You want to really know your plants canopy temps?Then trash all your wall mount thermometers they are useless and downright innaccurate and get a lazer thermometer.Until I got one I wasnt even close,and that was with 5 wall mount thermometers spaced in an 8 by 8 room.Its the only way to know true canopy temps IMO.EDIT I should add in each case in both rooms the temps were very much in favor of the grower,not the other way around.Another words as expected radiant heat added as much as 15 degrees in some cases to actual canopy temps,this was great news and gave me more manuverabilty come summertime.

 

[fallenangel]

ballest man : you are so true on this . there is so much varieation in thermometers its crazy . man , i wish i had the extra cash to buy a lazer gun (lol) thermo ... but now that i think of it ,, i think my buddy has one ...hmmm i wonder if he will let me borrow it???

 

[Guest]

Know any bldg. engineer's?They all have one for sure,AC guys too a lot of them.Mine cost a hundred but you can get a 60 dollar one somewhere I think radio shack.

 

[NorCal]

my last air king for some reason wen out on me after only 2 months, and i remember the day after i mounted it i came home and heard a loud kinda humming noise. it was from the thing vibrating against my wall, it was pretty loud so i decided to take it down, and yeah i was wondering what sandman meant..

 

[Guest]

I ordered three air king 9018 18 inch oscillators for an 8 by 8 room friggin retarded lol,as soom as I saw the boxes they were in from UPS I knew I made a mistake.Traded two to my hydro guy for some ferts and a little loss,havent had any noise or vibration trouble with the one I kept though,really makes a difference

 

[minds_I]

Hello all,

Its true that the radiant energy is will boost temperature reading as much as you say. However I measure the ambient air with sensor on the side of the box out of direct ligth from the bulb and at plant top level. There is siginificant fans mixing the air around so I feel the temps are an accurate measurement of ambeint air temps.

As far as the radiant energy--classic back of the hand test to see if its too hot.

In my cabinet the plant can grow right up to the glass and not get burnt.

Proper ventilation is key I think.

minds_I