Closet grow...Please help...Venilation...

Hey guys well i finally started working on my area. its and closet that i turned into an interior room, it has no exterior window, however i do have access to a small attic. my area is 3' wide x 5' deep and 7' feet tall...roughly 105 cf...i have a 400 wt hps to start but plan on upgrading to a 600...i also have a portable a/c unit which is 8000 btu's. my question is will this a/c be enough or will i also need an exhaust. the a/c has an exhaust that comes off the unit but i plan on venting it into the attic. will i need additional exhaust or should this be ok? the a/c its self controls the hummity and all so i think i should be alright there. would you recommend buying a carbon filter? have seen some good prices on ebay but not sure how good of a product they area. I plan of growing the BOG method, where i will be harvesting 2-3 plants every 3-4 weeks...i will be growing BOG's bogglegum, and also sweet cindy 99..a journal will follow once room is complete, hopefully in the next day or 2... ...any other tips would be great, this is not my first time but i am still learning...1st grow in my new room though..

post some pics, what kind of a.c unit? fresh air is key.

A bathroom fan vented to the attic and a box fan for circulation cheaper on the [elec/bill]

Do you have a window for fresh air? You need to remember that you have to bring that in. Exhausting the stale air is of course important but you have to replace that with a fresh supply.

Could you work with something like this:




Suncourt 6" Inline Duct Fan Rated at 240 cfm (cubic feet per minute)Tried and true tools for the heating and cooling trade, wisely adapted for cooling grow light reflectors. An Inline Duct Fan is a reliable and cost effective way to keep temperature in the indoor garden under control. Use one fan per light or to increase the efficiency of an exhaust system. These economically priced fans have a lesser cfm (cubic feet per minute air exchange) than the high output CAN-FANS also available on this site. Perfect for air cooling a single lighting reflector or ventilating a small closet sized grow room.
6" Inline Fan

16" Wall Mount Oscillating Fan 16" Wall Mount Oscillating Fan
- Three Speed
- Oscillating Wall mount fan saves valuable floor space in your indoor garden and provides air movement essential for strong healthy plant growth. Providing your plants continuously circulating air not only provides cooler temperatures, but also provides fresh air needed for vigorous growth. The gentle movement of the plants simulates Mother Nature to produce stronger stems for supporting heavy yields.
Oscillating function rotates fan back and forth to cover a large area.
Three fan speeds (low,medium and high) provides air circulation needed for proper circulation.
Size:

CAN 33 Carbon Filter Can-Filters has been manufacturing carbon air filters for over 15 years. With time comes experience and professionalism which has enabled the manufacture of a high quality, no maintenance, carbon air filter for the ultimate in air purification, particulate removal and extreme odor control, up to 99.5%.If you’ve ever tried to garden with organic fertilizers in a greenhouse environment, or suffered through allergies due to pollen, you’ll see why we offer these amazing filters.
All carbons are not the same. Can-Filters uses a custom specified Virgin Activated Coal Based Carbon (CKV4) to insure longest possible performance. Whether utilized for commercial, industrial, or residential use, you can be sure that the proper carbon type, carbon weight, and bed width has been chosen for maximum effectiveness.
Can-Filters Activated Carbon Filters are constructed with a "packed bed" design to give consistent performance, long life (12 to 18 months), and are completely maintenance free. The packed bed design prevents the formation of preferential channels which can allow untreated air through the system. This unique design gives Can-Filters a larger surface area for significantly lowered pressure drops.
Effective treatment requires the exchange of air in the growing area in a period of 5 minutes. Compute your requirements by mulitplying the width times the length times the height of your growing area to obtain the total cubic feet. Divide this number by 5 to determine the proper filter size needed.
For example, if your growing area is 8 feet long by 8 feet wide by 8 feet tall, it contains a total of 512 cubic feet. To treat this area in five minutes, you would need to use a fan with a CFM (cubic feet per minute) rating of approximately 102.
Recommended fan is 6" High Output Inline Fan
Specs:
Max cfm: 200/350m%B3/h @ 0.1 sec
contact time
Recommended Max Airflow: 400 cfm
Prefilter: Included
Flange: 6 inches included
Also accepts 8 inch flange.
Dimensions: (with pre-filter)
Outside Diameter: 305mm / 12 inches
Height: 330mm / 13 inches
Carbon Bed Width: 50mm /2 inches
Max Operating Temp: 80%BA C
This heavy-duty CF Can Filter 33 successfully eliminates odors for up to 18 months. Can Filters have screw-on or snap-on mounting features and come with pre-filter and appropriate flange. Measures approx. 13” x 16”

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Uvonair Jr.

That kind of stuff?

as far as fresh air there is no window to the outside, in my grow room but there is a door i could open to bring new air to the room, and there is a window in the room but not in the grow part. i could also put an intake in the bottom of my grow room. this is the a/c unit i have, except i have an 8000 btu unit..

Everstar 10,000 BTU/hr portable room air conditioner with full function LED remote control. Cools up to 400 sq ft (20 Ft. x 20 Ft.). 9.4 EER. 3 cooling 3 fan speeds plus dehumidify mode. Window vent installation kit included, no permanent installation required. Adjustable thermostat. 2 way air direction. Adjustable vertical louvers. Uses standard 115 v electrical outlet. 4 casters for easy room to room movement. Warranty: 5 year sealed system. Exchange only-no refunds.


• Full function remote control• Cools up to 400 sq ft• 3 cool 3 fan speeds plus dehumidify mode• Window vent installation kit included

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Store In-Stock SKU # 308657

i already have to isolating fans, and plan on buying a can filter. when you say fresh air, do you mean air from outside, or just new air into the room? will post pics of my room under construction. thaks guys..

new air is fresh air

Just new air into the room.

so will i need an intake in the room as well? if i was to set my portable a/c at 74 would that work, then i could buy an exhaust fan to mount in the top of the room to suck hot air out, would it be better if i ran an a/c duct to the closet instead of portable a/c unit? my only problem there is that i would be sharing the same a/c and smell could be an issue. got the room fully enclosed today will be posting pics soon....

It would be better to open a door then to rely on your ac to bring in fresh air.

ok well here it is, after doing a little research i am going to have an intake hole somewhere on the bottom and then i will have an exhaust fan in the opposite corner hooked to a carbon filter in the attic. i have a 400 hps hortilux, will i be ok with an open reflector or should i go with something air cooled. here are my pics, i tried to be as stealth as i could. is there anyway i can get away without using my portable a/c if i have an intake and an exhaust or should i still use it? the 2 closet doors are locked and can not be opend. the single entrance door can be opened when no one is around. average temp is the outside room is about 72-74. let me know what you think, i am open suggestions and opinions are welcome...will be planting 20 seeds tonight in search for some lucky females...will keep ya posted...

You'll be fine with an open reflector, remember you have AC?
I'm not sure if you are following what mogie
is saying. You can't just condition or push or pull air. You need to have the air be fresh, meaning you will be letting in CO2 in and blowing out the plant respiration, heat and additional oxygen. From your description and pictures it's hard to be sure, but it looks like you will be exhausting into a closed room and intaking from the same room.

I have a similar size grow space, but my AC is outside the grow room in the larger room and is constantly refreshing the air from outside. I hope I have been helpful.

yes i follow exactly what your saying. my pictures arent very clear, the double doors are located in a room, while the single door is located in the hallway. from my grow room i have 2 walls that i can cut an intake hole into, and i can also exhaust out my attic into a carbon filter. both places where i can draw air from via my intake hole both have a/c and the temp in those rooms is usually around 73-74. would a can fan 33(carbon filter) and a 200 cfm inline fan be suffient for my area. my total cf is 130. would i need an intake fan or would a hole be good enough...thanks for your help guys...got 16 babies waiting to sprout now...will keep ya posted...

Dude, you need a passive intake system, not an ac.

A 90 CFM with a 600 watt light will raise your temperature above the intake by 21°. The 240 CFM fan will raise it 8°. 90 CFM wouldn’t be enough. It’s not the size of the cabinet that you want to take into consideration; it’s the wattage being used.

(600 × 3.2) ÷ 90 = 21.33

(600 × 3.2) ÷ 240 = 8

To find how much the light will warm the room with a different size fan you can just use the formula. Just take the wattage of the light and multiply by 3.2. Then divide the CFM of the fan to find how much the room will warm in Fahrenheit degrees.

For instance:

If the temperature of the intake air is 75° and you’re using a 600 watt light, the temperature would go up 5° if you used a 384 CFM fan. So, the temperature would end up 80°.

(600 × 3.2) ÷ 384 = 5

5° + 75° = 80°

Peace

I think I understand your design now. You probably will need the AC . We have similar setups. Your exhaust and CFM is fine. If the AC is a walll unit then you have almost the exact ventilation I have and it works great. I use AC always as a fan and as a conditioner when the room temp hits 80F (because it will be 80F+ with my open reflector inside the grow space).

Cheers!

ok so i think i understand. like i said i am going to start with a 400hps, then plan on upgrading in the future to a 600. should i go ahead and get a fan big enough to support both lights. was thinking of going with a 465cfm Squirrel-Cage Fan. would this be enough air? i am also going to have an intake somehwere along the bottom. does the intake need a fan also, or just a hole? how big does the intake hole need to be?