amillergreen
New Member
So I have done days of researching before ordering all my parts. I put it all together and the Temps are horrible!
Setup:
2'x4'5 Grow Tent (https://www.amazon.com/gp/product/B00H9OJHYA)
2 300watt LED (https://www.amazon.com/gp/product/B00INM0750)
a 4" 100 CFM inline duct fan (https://www.amazon.com/gp/product/B00F6BL11U)
a 6" 220 CFM inline duct fan https://www.amazon.com/gp/product/B00KMDTE3O)
a 4" carbon fliter (https://www.amazon.com/gp/product/B00E582DV2)
The 100 CFM fan is used as an active intake (it is pushing through a mesh window because the grow tent had no low access holes.). The 220 CFM fan is used as the exhaust. I started with just the 100CFM so all my ducting is 4" but with just the 100 I was getting low 90s for temp so I ordered the 220. I thought it would make a big difference but it didn't.
With both lights on I am getting temps of 86-88 F
With just one on I get 84-86 F
I don't know why the temps are so bad. Ambient air here has been around 75 F. And it is only going to go up as summer gets hotter, so my temps will probably hit the 90s in no time. Also I cant seem to get negative pressure in the tent. because the tent walls don't buckle in, even slightly. I feel like a 220 CFM should be able to do that no problem.
I think one of my problems is i am exhausting through my dryer vent that is only 3". could this be causing the weak suction problems? My 6' fan is connected to a 4" carbon filter and 4 "ducting that funnels int my 3" dryer exhaust. cool all the small pipes be constraining the usefulness of the fan? I do not have any other options of exhaust vent then the 3" dryer pipe. So if I cant do this grow tent then so be it. But I want to know before I run out of return time! I don't think that's the case as I have seen people grow in closets while exhausting into the closet! I am at least getting it out my building! 3" pipe or not I feel like that has to be better.
Another problem I have noticed is the suction around my carbon filter is so weak it cant even hold onto a tissue! 220CFM is literally less than a foot away! But I also ran the system with the carbon filter off, and after running one light for an hours the temp was....... 86.... the same that it was with the damn carbon filter on!
Another weird quirk of my messed up system is I did a temp test without any lights and the temp went from 77 (everything off all night) to 79 after 30mins of just intake and exhaust running. So my fans are actually heating up my tent... Not sure what that is telling. But I am guessing something is messed up! I did the incense smoke test to verify that all air flow was going the right way
Please help cause I am running out of ideas! I attached pics of my setup,
Setup:
2'x4'5 Grow Tent (https://www.amazon.com/gp/product/B00H9OJHYA)
2 300watt LED (https://www.amazon.com/gp/product/B00INM0750)
a 4" 100 CFM inline duct fan (https://www.amazon.com/gp/product/B00F6BL11U)
a 6" 220 CFM inline duct fan https://www.amazon.com/gp/product/B00KMDTE3O)
a 4" carbon fliter (https://www.amazon.com/gp/product/B00E582DV2)
The 100 CFM fan is used as an active intake (it is pushing through a mesh window because the grow tent had no low access holes.). The 220 CFM fan is used as the exhaust. I started with just the 100CFM so all my ducting is 4" but with just the 100 I was getting low 90s for temp so I ordered the 220. I thought it would make a big difference but it didn't.
With both lights on I am getting temps of 86-88 F
With just one on I get 84-86 F
I don't know why the temps are so bad. Ambient air here has been around 75 F. And it is only going to go up as summer gets hotter, so my temps will probably hit the 90s in no time. Also I cant seem to get negative pressure in the tent. because the tent walls don't buckle in, even slightly. I feel like a 220 CFM should be able to do that no problem.
I think one of my problems is i am exhausting through my dryer vent that is only 3". could this be causing the weak suction problems? My 6' fan is connected to a 4" carbon filter and 4 "ducting that funnels int my 3" dryer exhaust. cool all the small pipes be constraining the usefulness of the fan? I do not have any other options of exhaust vent then the 3" dryer pipe. So if I cant do this grow tent then so be it. But I want to know before I run out of return time! I don't think that's the case as I have seen people grow in closets while exhausting into the closet! I am at least getting it out my building! 3" pipe or not I feel like that has to be better.
Another problem I have noticed is the suction around my carbon filter is so weak it cant even hold onto a tissue! 220CFM is literally less than a foot away! But I also ran the system with the carbon filter off, and after running one light for an hours the temp was....... 86.... the same that it was with the damn carbon filter on!
Another weird quirk of my messed up system is I did a temp test without any lights and the temp went from 77 (everything off all night) to 79 after 30mins of just intake and exhaust running. So my fans are actually heating up my tent... Not sure what that is telling. But I am guessing something is messed up! I did the incense smoke test to verify that all air flow was going the right way
Please help cause I am running out of ideas! I attached pics of my setup,