Venting My Grow

i have a grow room which is about 21 sqft. which i intend on using for flowering. I have a 4" carbon filter, a 4" fan which is 175 cfm and a 6" air cooled light. I'm wondering if i buy a couple air reducer for between the filter and air cooled hood swell as 1 between the hood and the fan will this be sufficent to kill the door and keep my temperature below 80, room temperature is normally around 72

How could we possibly know without knowing what light you are growing with? Also, what kind of fan? Is it one of those crappy duct fans, or a real fan? How tall is your room?

This should answer some of your questions.

To control excessive heat build-up a ventilation system must be incorporated. This can be done simply with fans, or a carbon filter/fan combination that will clear odor and sterilize the area at the same time. Ideal Grow Room temperatures should be between 65*F and 75*F. If temperatures rise above 85*F your plants will begin to suffer from excessive transpiration, which is the loss of crucial water held within the leaves and stem cell walls. Another factor that ventilation will help control is the relative humidity level or RH of your growing environment. RH can also have an affect on transpiration. Proper humidity levels range from 45%-65% RH. A Thermometer/Hygrometer is a must to maintain proper levels.
Some General Tips:
• Lighting systems generally consist of four components: ballast, cord and socket, bulb and reflector. A 400 watt lightwill cover a 3x3 or 4x4 area, a 600 watt will cover a 4x4 or 5x5 area, and a 1000 watt can usually cover up to an 8x8. Remember the more light you have, the more the plants can feed, thus photosynthesize and produce a fruitful yield.
• When air cooling lights, use at least 250 cfm per 1000 watts. (my opinion I think this is closer to 400cfm to cool)
• Generally it’s a good idea to use 3000 btu of cooling energy per 1000 watts.
• Typically, you will want to exchange the air in your grow room every five minutes. To figure this out use the formula Length x Width x Height = Cubic Ft, then Divide by 5 to get your recommended CFM (Cubic Feet per Minute)
(Example 8ft x 12ft x 8ft = 768 divided by 5 = 153.6 so you would need at least a 153 cfm fan to exhaust your room)
Using Carbon Filters:
Carbon filters are great to use in your grow room. Since you need an air exchange any way, why not sanitize your room in the process? Match the CFM of the filter and fan, attach it to fan intake, and you are ready to go. All carbon filters have a recommended CFM; it is important not to exceed the recommended CFM as the filter will not sterilize the air properly. When mounting your carbon filter it is best to mount the filter high in the grow room to allow any hot air to be filtered first. If mounted and connected properly your fan and filter will accomplish three things:

• Act as an air exchange in your grow room
• Decrease the temperature by taking out hot air
• Sterilize grow room killing mold spores, pathogens, and deodorizing

hope this helps!!! Stay High!!

have 600w 3 bulbs cfls in a 2x3 area good venting temp to high 82 degree could i remove 1 bulb and be ok

ollis reddog said:

have 600w 3 bulbs cfls in a 2x3 area good venting temp to high 82 degree could i remove 1 bulb and be ok

Click to expand...

So you have 3 200 watt bulbs, (assuming that is actual watts and not equivelant watts)? That is a lot of wattage to lose. Are your temps at 82 degrees towards the top or bottom of your grow? I would do what i could to save your lights and try and pump in some cooler air. If 82 is towards the top of your grow you should be ok. I have flowered in 90+ degree temps. Not ideal but doable. stay high

shrxhky420 said:

This should answer some of your questions.

To control excessive heat build-up a ventilation system must be incorporated. This can be done simply with fans, or a carbon filter/fan combination that will clear odor and sterilize the area at the same time. Ideal Grow Room temperatures should be between 65*F and 75*F. If temperatures rise above 85*F your plants will begin to suffer from excessive transpiration, which is the loss of crucial water held within the leaves and stem cell walls. Another factor that ventilation will help control is the relative humidity level or RH of your growing environment. RH can also have an affect on transpiration. Proper humidity levels range from 45%-65% RH. A Thermometer/Hygrometer is a must to maintain proper levels.
Some General Tips:
• Lighting systems generally consist of four components: ballast, cord and socket, bulb and reflector. A 400 watt lightwill cover a 3x3 or 4x4 area, a 600 watt will cover a 4x4 or 5x5 area, and a 1000 watt can usually cover up to an 8x8. Remember the more light you have, the more the plants can feed, thus photosynthesize and produce a fruitful yield.
• When air cooling lights, use at least 250 cfm per 1000 watts. (my opinion I think this is closer to 400cfm to cool)
• Generally it’s a good idea to use 3000 btu of cooling energy per 1000 watts.
• Typically, you will want to exchange the air in your grow room every five minutes. To figure this out use the formula Length x Width x Height = Cubic Ft, then Divide by 5 to get your recommended CFM (Cubic Feet per Minute)
(Example 8ft x 12ft x 8ft = 768 divided by 5 = 153.6 so you would need at least a 153 cfm fan to exhaust your room)
Using Carbon Filters:
Carbon filters are great to use in your grow room. Since you need an air exchange any way, why not sanitize your room in the process? Match the CFM of the filter and fan, attach it to fan intake, and you are ready to go. All carbon filters have a recommended CFM; it is important not to exceed the recommended CFM as the filter will not sterilize the air properly. When mounting your carbon filter it is best to mount the filter high in the grow room to allow any hot air to be filtered first. If mounted and connected properly your fan and filter will accomplish three things:

• Act as an air exchange in your grow room
• Decrease the temperature by taking out hot air
• Sterilize grow room killing mold spores, pathogens, and deodorizing

hope this helps!!! Stay High!!

Click to expand...

^^ The Best Answer you're gona get ^^

Excuse me could anybody tell me if i would need a fan blowing on my plants using leds

Really???????????//

you should always have a fan blowing on your plant and making the leaves "flutter" no matter the space cause with this the fan blows on the plant and breaks down the cell walls in the stems and leaves and then they build it back up like working out your muscles causing them to be stronger and bigger. bigger stem= bigger buds. also having a fan on your plants allows for fresh CO2 to get to the plants regularly

the light is a 1000 W the room is only 147 cubic feet. so base on the calculation the fan will be sufficient. is a 4" carbon filter sufficient to remove the odour tho?

also i would like to know if you keep your temperatures good and exchange the air enough can you jus have your intake air from within a house or is it important to bring in fresh outside air?

my 3 cfl bulbs are equivelant total 600 watt full spetrum 65k . temp is good 65 to 75

is lights enough for good veg grow? w/ co2 vented with outside air to cool

humidity is 50 day 70 night 3sq.ft. 18 in tall cabnet

BCbudha said:

also i would like to know if you keep your temperatures good and exchange the air enough can you jus have your intake air from within a house or is it important to bring in fresh outside air?

Click to expand...

It doesnt have to be outside air.

ollis reddog said:

my 3 cfl bulbs are equivelant total 600 watt full spetrum 65k . temp is good 65 to 75

is lights enough for good veg grow? w/ co2 vented with outside air to cool

humidity is 50 day 70 night 3sq.ft. 18 in tall cabnet

Click to expand...

Forget equivelant that don't mean shit... you are probably running 150 actual watts... good enough for veg... how many plants?

stay high