Speaking of setups, Duct system

[Phinxter]

the electric company wont even flinch at 3 x 1000 watts with AC. usually a human never even sees the bill anyways its all computer generated ... just pay the bill on time and do your best to conserve energy elsewhere. change the rest of the house bulbs to CFL to save some money.
run your 12/12 cycles on cycle at night when its cooler so you can save a bit on cooling.
and set your cooling fans for the lights to only run for the whole on cycle plus 10 minutes after to finish cooling but turn them off when the lights are off to save on some there.
set your ventilation fan on a thermostat so that you only vent when it gets tooo hot so they dont run 24/7 .
you can find ways to save a few bux everywhere you look and you will want to in the long run

 

[vnbenny]

ok good call il quickly draw what i mean with the carbon filter, it works good since my friend has same kinda set up, although lights should be sealed so no air from the growroom gets in without coming through the duct

they are closed light right ?

 

[Phinxter]

mmm i see what yer saying vnbenny about the single fan with carbon filter at the start of lighting duct. that too works and yes cuts back to 1 fan.
i misread what you had posted thinking you didnt see filtration at all
have a great night

 

[vnbenny]

here ya go, take a good look, i know it works fine

 

[Floweringfor40]

Hey MGB, Kind of hard to make out some of the drawing but here's what jumps out at me. Looks like you're going to eventually have all the exhaust lines tied together. I would increase the diameter of your exhaust to handle the extra airflow as more lines connect. So if for example you are using 4" flex hose to vent your lights and are going to bring three of these together at the end I would increase my gathering flex hose to an 8" line and add an inline 8 inch booster fan just after all the lines have been joined. Put the blowers you are going to use close to the input side of your lights. This will push your air through, the small line will increase into a larger air exhaust and the booster fan will prevent "back flow" which will kill your air movement through the lights and inturn greatly increase the temp in your room.

Check out the "Max Fans" for your front end fan and "Active Air" booster fans. I run two 1000W HPS lights daisy chained together, 8" Max fan right before the first light and then the active air booster fan right before the end of the exhaust hose run. I can put my lights within two inches of the plants without burning them.

Remember you lose half your lumens for every foot away from the plant the light source is. 1000W turns into 500W in 12 inches and down to 250W in twenty four. My opinion light cooling is one of the top two or three things in any grow room.

Hope that helps
FloweringForForty

 

[lorenzo08]

here ya go, take a good look, i know it works fine

View attachment 195356

this isn't a good idea. 3 1000 watt lamps can be cooled in series with good air flow, but a carbon filter will restrict to much air flow for the lights, and taking in hot air from the room to cool the very hot lights is also a bad idea. say the room air is 80f. you heat that air with 2 very hot lamps, the 3rd lamp still has to be cooled with that same air. not very efficient.

I personally do like the original drawing with the T's. each lamp has its own fresh cool air intake and an inline fan. as long as you have a 8 or 10 inch exhaust line to gather the hot air after the lamps, it should work well.

will the ac be running on low constantly or will it be handling all of the rooms heat? I would have the carbon filter fan run on low during day light just to freshen up the co2 in the room, unless you're doing co2 injection. maybe a sealed room would be possible then? that's not something I've looked into at all yet, but sounds like it would be great.

 

[morrisgreenberg]

i agree with lorenzo, i want to have the carbn seperate from the inline ducting, i just want fresh cool air for the lights, the a/c wil be handlig the room temp, it remains to be seen if high or low will do the trick, maybe a 5000btu ac will do the trick, yes the houseing on the reflectors enclosed, they are called easy cool 8's from HTG..so in essence the air cooling the reflectors will be outside of the room air the air inside gets drawnout by the can fan/filter combo and the /c will provide fresh air, ofcourse i wil be rigging the a/c's exhaust out of the room aswell,

 

[HappySack]

no, turn your lights 180 duct them inline pull air through, not push