Bad carbon scrubber?

People seem to be ignoring the bigger problem here. if you have nowhere to send the oxygen rich exhaust it will get sucked in back to the tent or space and your plants will get choked out... lack of co2... and your plants will crisp up and die. Unless you are set up for co2.

Ask me how i know... lol

curious2garden said:

Fans are always more efficient pulling rather than pushing.

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I don't get it, why is a fan more efficient pulling through a duct or restriction, rather than pushing?

Gquebed said:

People seem to be ignoring the bigger problem here. if you have nowhere to send the oxygen rich exhaust it will get sucked in back to the tent or space and your plants will get choked out... lack of co2... and your plants will crisp up and die. Unless you are set up for co2.

Ask me how i know... lol

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How do you know?
Other than a c02 monitor, is there an easy way to tell if co2 is too low?

1212ham said:

I don't get it, why is a fan more efficient pulling through a duct or restriction, rather than pushing?

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If we push there's a chance at a higher than atmospheric pressure to leak out prior to being filtered... someone else want to try? I guess the same can be said on the intake at lower than atmosphere something could leak in without getting filtered... someone with computational fluid dynamics modeling capabilities could shed some light. I've always pulled and never had an issue with phresh/can filters. Clean the pre-filters often.

1212ham said:

I don't get it, why is a fan more efficient pulling through a duct or restriction, rather than pushing?

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It follows from a mass flow perspective, that higher pressure air has higher density and when you push the air in the duct will have higher pressure than if you were pulling. This means that for a given unit of time, more air flows though a pushed duct than a pulled one. It also means that the fan has to work harder to push against a higher pressure.

When you are trying to get rid of odors then it is better to pull since the inside of duct will be at lower pressure than ambient, so any small leaks will let in more fresh air rather than blow out the stuff you are trying to get rid of and the fan won't be working against as much back pressure.

Obviously this is a huge over simplification, for more information look up Bernoulli's and Boyle's laws.

CannaBruh said:

If we push there's a chance at a higher than atmospheric pressure to leak out prior to being filtered... someone else want to try? I guess the same can be said on the intake at lower than atmosphere something could leak in without getting filtered... someone with computational fluid dynamics modeling capabilities could shed some light. I've always pulled and never had an issue with phresh/can filters. Clean the pre-filters often.

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That's why you add filters to your intakes

1212ham said:

How do you know?
Other than a c02 monitor, is there an easy way to tell if co2 is too low?

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Your leaves will show brown spots. Thats the plant eating itself for the co2 it needs. The more brown spots you see the more co2 it is searching for.
Brown spots could be any other deficiency too, but if you know your plants arent getting fresh air from somewhere...