Filter for intake and exhaust

[tokersmoke]

Okay so i have 2 inline fans that are drawing air in from below my room obviously they will suck nasty sand and bugs through it if i dont put something in the ducting.I was thinking window screen?Any inputs?

 

[trichrider]

hair net

 

[tokersmoke]

Thanks i was thinking window screening attached with tape but i think some bugs could make it through!

 

[the gnome]

i use a nylon paint screen for an airless sprayer when i run cooltubes
they come iin 1+5gallon sizes.

catches gnats and dust, you can't hear any kind of discernable drag on the 6" inline

 

[Hammerhead]

They sale inline fan screen nets at the hydro store. Im using 1 on the 12" intake thats under the house. You will have to go under there to clean it every month or it will clog. Not very concerned about bugs if they make it through the screen the fan will mulch them right up. I have not seen any insects enter through it. Mite's and other pest that we hate to get don't live under the house. The bugs there are larger predator insets. Potato bugs silverfish. Spiders like Black widow, daddy long legs and other large spiders live here.

 

[tokersmoke]

thanks gonna have the room finished soon!!Got plenty clones waiting

 

[Highlighter]

I would seriously consider a HEPA filter or even a Phresh intake filter.
My #1 worry would be sucking in spores from under a house.

 

[tokersmoke]

High i just hit up the lowes and found a make your own air filter by filtrete that has a carbon filter in it.says its for pet odor control.you can cut it and customize it seems to work great!

 

[foomar]

Have always used a piece of old stocking or tights material stretched over the intake and held in place with a rubber band , 20 denier has little drag on the fan.

 

[Granger2]

I would never have a set up that required me to crawl under the house with the Black Widows, etc. I intake my lamp cooling from under the room. I'm mainly concerned with dust/dirt. Hole in floor covered with 1/2" hardware cloth [rodents], plywood box with straight duct going up to a larger plywood box that is slotted precisely to accomodate a medium duty pleated AC filter, with duct leading out, going to rest of lamp cooling system.

Boxes are constructed from thin plywood, 1x2's, screws, black silicon caulk. Build box to handle a common size filter. Filter access door has stick on foam weather stripping and wing nuts for fastening. I'm not worried about insects entering that way. If they get by the filter, and survive the centrifugal fan, they will end up being blown into the attic. They have no way to enter the room [lotsa caulk]. Good luck. -granger

 

[tokersmoke]

I thought of something similar.This is an outdoor building its off the ground about 7 inches on blocks.My make you own air filter is working great.The room is getting the final touches.Thanks for all the help.

 

[Hammerhead]

LMAO Scared of spiders are we... Cali is a place where they live. It doesn't mean there will be any under your house. I had a pet widow when I was a kid . Im not going to let Black window scare me off it's very rare to die from a bit from one. I have crawled under stuff that had hundreds of them. they don't want anything to so with us. I have never been bit. Insects don't bother me, they bother my plants...


Having your intakes and exhausts under the house has always been the better alternative to attic's. Pushing all that heat and condensation up into the attic can cause mold to grow. I have seen it at other grower setups. Spores from what ???. its not wet under there if it is you have a issue that need to be fixed. its just cold and dark. My house has poly film on the ground. covers the entire footage of the house. So when I go in on plastic. I have the same on the underside of the flooring all covering in poly with insulation in between.


I also don't cool my lights. I use Gavita and E-P these will fail if cold air is blown over them. I keep the entire rooms environment controlled that is the best way always has been.

 

[tokersmoke]

IM going to be adding 3 more hoods in this area so ducting should be fun.Today the temp was about 65 outside.Inside the room with the light on and no ac temp was at 72.The other day it was 90 and with the light on and the ac on i could get down to 70.So everything appears to be working with just the one light.I will be adding the clones in the next day or two from inside.

 

[Jhhnn]

I would never have a set up that required me to crawl under the house with the Black Widows, etc. I intake my lamp cooling from under the room. I'm mainly concerned with dust/dirt. Hole in floor covered with 1/2" hardware cloth [rodents], plywood box with straight duct going up to a larger plywood box that is slotted precisely to accomodate a medium duty pleated AC filter, with duct leading out, going to rest of lamp cooling system.

Boxes are constructed from thin plywood, 2x2's, screws, black silicon caulk. Build box to handle a common size filter. Filter access door has stick on foam weather stripping and wing nuts for fastening. I'm not worried about insects entering that way. If they get by the filter, and survive the centrifugal fan, they will end up being blown into the attic. They have no way to enter the room [lotsa caulk]. Good luck. -granger

Excellent technique. There are lots of different ways to configure a filter box, but the key is a big filter that's low restriction, easy to inspect & change, slow to clog, too.

 

[tokersmoke]

granger always gives good advice seen quite a few useful suggestions in my searches.

 

[Jhhnn]

granger always gives good advice seen quite a few useful suggestions in my searches.

That post certainly was useful form the perspective of an old HVAC tech.

I've been negligent in giving people the props they deserve with the rating button. I need to work on that. It's a feature I haven't found elsewhere. I'll do better, I swear!

 

[Granger2]

Tokersmoke,
Aw shucks. Thanks.

Purple Frostbyte,
You're right. People seldom die in 1st World countries from a Black Widow bite. They just spend 5 days wishing they were dead. I was bitten by a Brown Recluse, and when I said I didn't really want them to cut out the flesh around the bite they said that I'd lose my leg. But spiders aren't the reason I wouldn't want to have to crawl under the building to change a filter. I would much rather stand inside my room and change it. I don't think I said anything about spores, but fungal spores are in the air regardless of where it comes from unless aggressively filtered. That's why so many people have trouble with Powdery Mildew and bud rot. It's in the air they intake, and they can't control the humidity when they're running outside air thru their room constantly. I run sealed with AC, dehum, CO2, air cooled lamps, and don't get those problems-not so far. I've edited my other post because I incorrectly said I made the boxes with 2x2's, but I made them with 1x2's. Good luck. -granger

 

[tokersmoke]

Yea i got bit by a brown recluse while i was sleeping.When i awoke my leg was so swollen i couldnt remove my pants.Not to far from where i was sleeping a kid got bit on the lip.The poison made his tongue swell they had to cut a hole in his throat to breathe.Spiders arent anything to fuc* with.

 

[StoopheadFred]

High i just hit up the lowes and found a make your own air filter by filtrete that has a carbon filter in it.says its for pet odor control.you can cut it and customize it seems to work great!

Great idea with the household carbon filter!

Let's take it to the next level! I happened to see this the other day when researching how to cut down on pet allergies. You just use a 20" x 20" home furnace filter and tape it on to a regular 20" box fan (like this Lasko model for $17 http://www.lowes.com/pd_95021-1621-3733_0__?productId=1114391&Ntt=lasko+box+fan&pl=1&currentURL=%3FNtt%3Dlasko%2Bbox%2Bfan&facetInfo=).

I'm wondering if you used this 3m filtrete odor reduction / carbon filter if it would actually filter strong plant smells. I've already got the fan and the filter is on order so I'll report back. Would be nice to build an effective and painfully simple carbon filter for around $40.

 

[tokersmoke]

stoop it was the 3m one great idea!!!!I couldt see how that wouldnt work.