Panasonic whisper fan filter options

[tye7]

I bought a Panasonic whisper ceiling fan 150cfm. Out of the box it is dead quiet, but with enough pressure it gets noisy. I'm going for ultimate stealth noise-wise.
I have a cab that is roughly 25 cubic feet volume with 440w of pll's.. I can't mess around with ventilation. It needs to work!

Originally i was going to do the carbon tray diy that is here on icmag, but the fan did not like it and I'm starting to feel like its a crappy rigged design anyway. I need piece of mind on this one.

Can i attach a can filter to this fan? I considered buying 4 of the can 2600's and ducting them all up to the Panasonic fan's 12x12 intake. That would allow for a large intake area, and less static pressure?? Is that right? I wonder if that Panasonic has the power to handle any carbon at all. I'd like to salvage this fan since i paid $150 for it.

If its too noisy i can do some insulating and get a muffler.

Any ideas anyone?
At this point I'm invested in this cab and have to make it work 100% reliably.

Thanks

 

[wantaknow]

it would seem to me that one would use a carbon scrubber that re circulates in the cab and use a router speed control from harbor freight to dial in the speed of the scrubber,it works well

 

[tye7]

i decided to just buy a regular inline fan with filter and avoid the "rigging" with the ceiling fan. Now i have a really sweet bathroom fan to play with i guess... Ugh hobbies are expensive

 

[supermanlives]

bathroom fans aint designed fro carbon filters. get a real fan

 

[rives]

I've been using a Panasonic Whisper fan exhausting through a Phat filter on my bonsai mom cab for a couple of years now. The Whisper's cannot be used with an external speed control - they have some interesting circuitry to keep their output constant as the load changes. The inline fan is probably a better option for your application anyhow, I doubt that the Whisper would have kept up with your heat load. My cabinet is a converted freezer with approximately 20 cubic feet of volume, 110 watts of PL-L, and it works about right.

 

[dansbuds]

I've been using the 110 cfm model with a can 9000 adapted to for my small veg room for a couple years now with no problems . originally made it for a wardrobe cabinet grow room . i just put a sheetmetal square over the intake portion of the fan with a 4" start collar & its been great .

 

[tye7]

you are right about the whisper not keeping up with the heat. right now with no carbon, just the static pressure of the cab's light traps, it is hovering at 86-87f. And its pretty loud really. I figure that its probably putting out less than 100cfm with the added pressure.

I ordered a 170cfm inline with a controller and a small phresh filter.. Hoping for the best. I'm probably going to grab a 4 inch duct muffler at the local shop too. Then maybe with some insulation i can get it down to pretty silent and manage the heat well.

Any ideas on what i should do with this whisper fan? Was thinking of turning it into an emergency scrubber to just set up in the room if needed.

 

[jakeh]

It sounds like we have the same setup. I just did exactly what bluenath? did with his 80 cubic ft panasonic x 2 for extra capacity and in case one broke. I'd have to see a picture of the fan. If it is not too late to send it back bluenath's model works great the way he set it up.

 

[J. Greenstein]

I have the same issue with the 150 cfm panasonic whisper. My home made carbon filter just chokes it off, frankly I don't think a filter will work with this fan...I still have to try a thinner layer of carbon but not very optimistic.

 

[StoopheadFred]

OP your fan shouldnt be struggling to just move air through your box without a filter, if it is that means you've got more static pressure going on than you need to and should probably consider increasing your air intake size. I believe the rule of thumb for ventilation is you want 2x the intake size as you have exhaust, but I believe this rule is assuming straight, unrestricted intake and exhaust holes.

I'm about to buy one of the 110 cfm large profile (aka quiet) Panasonic Whisper versions to use with a 150cfm Phat filter. I'm going to try pushing and pulling through the filter and see which works better.

The DIY carbon filter for this fan seems like a good start to an idea that needs to be improved. This design has really low surface area and depending on how deep your carbon layer is it could be presenting a huge amount of static pressure to your fan. That's why commercial filters are designed the way they are... lots o surface area.

 

[snooze]

Maybe you didn't check this Panasonic whisperline out. No need to rig a bathroom fan, they make an inline fan

http://www.amazon.com/Panasonic-FV-30NLF1-WhisperLine-In-Line-6-Inch/dp/B001AHSDQU