Thank you in advance for taking the time to read this. All comments/suggestions are greatly appreciated.
Forgive my bad paint skillz, its a rough sketch to convey the idea quicker.
I'm looking for some reassurance that I've crunched the flow numbers correctly, and to make sure I'm not making a big mistake in the design.
This will be a quite large cab hidden in plain sight. Smell and noise are A+ concerns. The risk is that the landlord may be in the same room as the cab (would be a very rare occasion, but I believe this is my largest risk).
(I didn't draw in intakes for the plants to breath, just assume they are there and correctly sized)
Are my fan, filter, and room sizes reasonably matched?
Because I'm air cooling the hood separately, I'm thinking of aiming for only 1-2 air volume exchanges per minute. Is this okay (everything I've read suggests this is perfectly fine)?
The empty cabs are like 65 cu ft, give or take since exact dimensions are TBD. With stuff in them (plants
), I'd be surprised if there was 50 cu ft of air to move. So, like 50-100 CFM is what I'm aiming for.
Looking at Can-Filter's website, I see the Can-Filter 33 is listed as 200 CFM max exhuast (push through) flow, with 100 CFM as the recommended minimum air flow.
That puts me a tad higher than I'm aiming, but probably better to move too much air through the cab than too little. This appears to be the best matched Can-Filter for my situation. I'd DIY, but I'm pretty sure I won't do as good of a job building a carbon filter as Can-Filter does (and especially rating it, seems way easier to get the flow right from the start when they've tested the flows of their product. A DIY I'd be totally guessing) and this is the single most crucial part of the whole design (eliminating smell - second only to minimizing noise).
Looking for a fan, it seems the Soler & Palau TD-MixVent fans are my best bet for lowest possible noise with enough oomph to move air through a filter.
The Can-Filter 33 docs state that at maximum CFM the static pressure will be 0.75".
While I might be able to get away with the TD-150, I am planning instead on the TD-200. I will be purchasing S&P fan speed controllers, so if its a bit too much, which I'm actually hoping it is, I can turn the speed down. That should be quieter than the TD-150 at the same flow rate. And I can be pretty dang sure the TD-200 will have all the oomph I need.
As for the air cooled hood, I'm sure the smallest S&P MixVent would suffice, but again I'm going with a bigger fan on a speed controller for less noise at the same flow rate. The cost difference is almost insignificant, especially when accounting for the 4" to 6" adapters I'd need if I went with the TD-100. I also wonder if an axial or two stacked would do the job, but the fabrication time and cost possibly of 12v (if I use PC fans) makes it not really worth it.
Why am I? ...
Pushing through the carbon filter.
This is so that I don't have to buy 2 filters (1 for flower, 1 for mums), since I expect the mothers will have to be filtered as to not make the room smell like a greenhouse.
Also, I'm hoping to gain a muffling effect.
Does anyone think that a small carbon sheet filter + ONA Block Gel + (if needed) ozone would be enough to cover the mother & clone smell? This way I could put the carbon filter in the flowering room and pull through it, but it makes flowing air through the mums/clones area more complicated, possibly requiring additional fans and/or adjustable louvers to restrict flow through some of the ducts (might need those anyway)
Or am I best, as I think, pushing that air through the carbon?
Air cooling light through independent, unscrubbed path.
This is to extended the life of my carbon and allow temps to be managed independently of air exchange for plant breathing (to a degree).
Will this air smell if unscrubbed? I would think not - with the fan pushing through the hood, it will push air out through leaks into the cab instead of sucking SMELLY air through hood leaks and exhausting it unfiltered into the room.
Forgive my bad paint skillz, its a rough sketch to convey the idea quicker.
I'm looking for some reassurance that I've crunched the flow numbers correctly, and to make sure I'm not making a big mistake in the design.
This will be a quite large cab hidden in plain sight. Smell and noise are A+ concerns. The risk is that the landlord may be in the same room as the cab (would be a very rare occasion, but I believe this is my largest risk).
(I didn't draw in intakes for the plants to breath, just assume they are there and correctly sized)
Are my fan, filter, and room sizes reasonably matched?
Because I'm air cooling the hood separately, I'm thinking of aiming for only 1-2 air volume exchanges per minute. Is this okay (everything I've read suggests this is perfectly fine)?
The empty cabs are like 65 cu ft, give or take since exact dimensions are TBD. With stuff in them (plants
), I'd be surprised if there was 50 cu ft of air to move. So, like 50-100 CFM is what I'm aiming for.Looking at Can-Filter's website, I see the Can-Filter 33 is listed as 200 CFM max exhuast (push through) flow, with 100 CFM as the recommended minimum air flow.
That puts me a tad higher than I'm aiming, but probably better to move too much air through the cab than too little. This appears to be the best matched Can-Filter for my situation. I'd DIY, but I'm pretty sure I won't do as good of a job building a carbon filter as Can-Filter does (and especially rating it, seems way easier to get the flow right from the start when they've tested the flows of their product. A DIY I'd be totally guessing) and this is the single most crucial part of the whole design (eliminating smell - second only to minimizing noise).
Looking for a fan, it seems the Soler & Palau TD-MixVent fans are my best bet for lowest possible noise with enough oomph to move air through a filter.
The Can-Filter 33 docs state that at maximum CFM the static pressure will be 0.75".
While I might be able to get away with the TD-150, I am planning instead on the TD-200. I will be purchasing S&P fan speed controllers, so if its a bit too much, which I'm actually hoping it is, I can turn the speed down. That should be quieter than the TD-150 at the same flow rate. And I can be pretty dang sure the TD-200 will have all the oomph I need.
As for the air cooled hood, I'm sure the smallest S&P MixVent would suffice, but again I'm going with a bigger fan on a speed controller for less noise at the same flow rate. The cost difference is almost insignificant, especially when accounting for the 4" to 6" adapters I'd need if I went with the TD-100. I also wonder if an axial or two stacked would do the job, but the fabrication time and cost possibly of 12v (if I use PC fans) makes it not really worth it.
Why am I? ...
Pushing through the carbon filter.
This is so that I don't have to buy 2 filters (1 for flower, 1 for mums), since I expect the mothers will have to be filtered as to not make the room smell like a greenhouse.
Also, I'm hoping to gain a muffling effect.
Does anyone think that a small carbon sheet filter + ONA Block Gel + (if needed) ozone would be enough to cover the mother & clone smell? This way I could put the carbon filter in the flowering room and pull through it, but it makes flowing air through the mums/clones area more complicated, possibly requiring additional fans and/or adjustable louvers to restrict flow through some of the ducts (might need those anyway)
Or am I best, as I think, pushing that air through the carbon?
Air cooling light through independent, unscrubbed path.
This is to extended the life of my carbon and allow temps to be managed independently of air exchange for plant breathing (to a degree).
Will this air smell if unscrubbed? I would think not - with the fan pushing through the hood, it will push air out through leaks into the cab instead of sucking SMELLY air through hood leaks and exhausting it unfiltered into the room.
