just a simpson's reference

When I wrote the initial post in this thread, I thought my trays were 4x4'. They're not! I'd never measured them. They looked like 4'x4'!

They are actually 820mm^2 or 2.7'^2 (about 2'8"^2).

I have four trays and 2x 1000 HPS. Each 1000 lights a pair of trays.

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Get a harvest every 2 weeks - A batch of clones in rockwool - Al B. Gone

Cooltubes sorted. Mostly. The stuff is up but duct taped. I need to go buy some big honkin' hoseclamps to suit all the 150mm connections. Works, tho, for now.

Testing in mockup on the garage floor with 21C ambient intake air indicated that exhaust temp from the first lamp is 28.8C, a 7.7C rise. This is an optimal figure, with only one lamp in line and no bends. I expect more rise in practise when installed. Some bends and squishing of the duct are necessary to make it fit.



If 29C air is then series fed into another cooltube, the exhaust air temp is about 34C.



The tube sockets are ceramic, so at those temps, I didn't feel too bad about running the tubes in much mechanically simpler series instead of parallel, nor be terribly pedantic about orienting the tube socket towards the airflow. Works.



I did opt for a closed loop, drawing cooling air for the tubes from outside the room's airmass and also dumping outside. Since it's closed, no scent control is needed on the cooltube air circuit. Got an Allvent 150mm axial pushing it for now (in upper left of above pic), but I think there's a 150mm centrif in the future if but for lower noise. The axial will do the job for moving air through this system, but there's lots of bends and obstructions, noticeably reducing flow rate compared to other Allvent 150mm fans I have in use around here.



Input air during tests after installation was 22C. Output from cooltube 1 was 28C, output from #2 was 34C, rising about 6C for each 1000. I only tested it for about 15 mins as it's sposed to be nighttime in there now, but I'll get a look in later on when everything has properly started as usual and has been running for a couple of hours. I put a remote sensing thermo probe in the output duct to monitor the 'EGT' (Exhaust Gas Temperature for you non-jet jockeys ), as it were.

These cooltubes came with a built-in semicircular reflector which would have interfered with the batwings' even distribution pattern. Out came the tin snips and the built-in refs are gone.

The cooltubes' blower is on a timer, set to start at lights on but keep running for about 30 mins past lights off, assuring the lamps and sockets are dead cold before shutting down.

Of course, I expect my peak temps to be lower, but I'm especially looking forward to seeing what the RH does. If the main exhaust blower has to run less often because it's not solely responsible for removing heat from the lights, I bet I'm better able to control humidity. My dehumidifier is presently on a timer, set to run on lights-off only, but it may now be useful during lights-on. Without the cooltubes, the nicely dried air is blown right out because the heat from the lights triggers the main exhaust blower. Quite often recently, the intake air has been over 70% RH, and if the exhaust blower is running all the time, that's the RH in the grow room, too. I really want it to stay between 30-50%.

We'll see how we go!

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Get a harvest every 2 weeks - A batch of clones in rockwool - Al B. Gone

damn, do you set these things up in your spare time?? i suppose if you are harvesting 2lbs a month you can afford to have a lot of spare time

Took me about 2 hours to remove the sockets from the batwings, drill a couple of holes in each shade, install the cooltubes and route the ducting... even counting a coffee break in the middle of it... not a real big time investment, dood.

The production figure is up recently, looking more like about 3lb/mo since I fixed a few things. Here's hoping that the cooltubes will increase the output even more. There's no such thing around here as a bud that doesn't have SOMEONE'S name on it! Everyone always wants more, and usually RIGHT SPANKING NOW, DAMMIT!

Mind, you have to figure that growing dope IS my job, has been since this one particular pathetic drunken bitch ran me over (and fled the scene) some years ago... if it wasn't for weed, I'd have fronted the bankruptcy tribunal some years ago.

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Get a harvest every 2 weeks - A batch of clones in rockwool - Al B. Gone

we run our hood the same way. suck air from out the room through the hood ( hood has glass bottom) & back out the room. this method does suck some air from the room through the glass but it keeps just a little bit of pressure pulling into the room so no smell gets out when lights are on. & doesn't pull hard enough to suck all the co2 out the room. so seems 2 be very affective, & efficient .

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everything i talk about post or say is false & a lie, just trying to fit in. all pics are from high times & are not of my own. thank u for your time.

When you come up with a fan which will suck all the CO2 out of anything, let me know. We'll make a king's fortune solving global warming.

The only way room air can be depleted of CO2 is by not ventilating enough, allowing the plants to use up what CO2 is in the room's airmass.

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Get a harvest every 2 weeks - A batch of clones in rockwool - Al B. Gone

wow, sit still for a whlie, I am having trouble keeping up with all the improvments. VV

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http://www.rollitup.org/grow-journals/53595-vv-singing-blues-seed-perpetual.html
http://www.rollitup.org/grow-room-de...p-journal.html

haha ya no shit i just started doing this little cycle .. but on a much smaller scale haha i only do 18 clones at a time how many do u usally pull of the mums

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Everything i say is a lie!!
HEY!!! http://www.rollitup.org/general-mari...ml#post3383728

well ya i know that. im talking about the co2 that we are injecting into the room from a tank, lol

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everything i talk about post or say is false & a lie, just trying to fit in. all pics are from high times & are not of my own. thank u for your time.