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Smelly room, with filter should I be able to smell flowering buds?
SmylinPupilstarted grow question 4 years ago
I have a 3x3 grow tent with a 4” fan and filter. The filter is in the tent and exhausts into the room. I taped the filter to the line and line to the fan so no pinhole leaks. The fan is rated for 198 cfm. I have it on low because when it’s high the smell is worse.
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Setup. Ventilation
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NobodysBudsanswered grow question 4 years ago
If that is the case, you can reduce pull by adding some duct between filter and fan and putting a bend into it. That'll reduce by 25% further, i believe... check google for those guesstimation on ductwork and airflow. e.g. a 90-degree bend is equivalent to ~12' of duct? something like that.
Running it at a higher cfm for a month could have taken a toll too... just depends. i'd wager it's just buildup in that room why it smells more than you expect. Even if it filters out 99.9%, eventually it's going to cause a stink without ventilation.
NobodysBudsanswered grow question 4 years ago
What is the filter rated for? That will be the key as far as it's ability to reduce smell -- as well as overall quality.
As long as you have a slight negative pressure, and the filter is proper, it shouldn't be too strong. Better off piping it outside. May find that helps reduce smell if it can't build up over time. If it leves ~5%, that room will fill up with a higher concentration that what the filter is providing.
Usually those 4" filters are ~160cfm rated... going over that reduces effectiveness. Check the specs. Those adjustable 4" fans usually don't reduce more than 20-25%, unless you got a nicer one. If not, now worries, you'll be replacing that $30 fan within 1 year for sure, unless you are a lucky one.
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SmylinPupilanswered grow question 4 years ago
It’s a brand new filter purchased a month ago
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RelooManswered grow question 4 years ago
How old is your filter? Did it rattle when you hang it? Some of them are not packed right and the coal is loose which reduces the performance.
Is the exhaust setup creating negative pressure in the tent like it is supposed to be. Unfoetunarely I cannot calculate the cfm and the 3x3 to meters on the go :)
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Jef79answered grow question 4 years ago
Hello.. Hope you are well.. In my personal opinion the active charcoal set inside ur carbon filter has depleted.. Sum can b refilled but not sure on ur make or model.. Replacing it will remove any unwanted odours again.. Stay safe n gud luck on ur greens.. 👍🍀
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