[TheAxeMaster]

I have heard plenty of people talk about how big of a pain it is to keep their fresnels clean, yet I have see no topics on air filtration. So, if anyone has done it, post your solutions here.

What I am planning to do is build a small air box on the side of my projector and use these newer hepa vacuum filters (see attached picture). They are nice because of their size (the one on the vacuum I have is about an inch wide and maybe 7 or 8 inches tall). I was thinking that you could also just build your box a bit longer and leave enough space between the LCD and fresnel and mount the thing flush with the outside of the box.

I'll post some pictures of what I'm talking about for my install ideas later today.

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[joecnc2006]

Yes we do use dust filter, I get the black filter from walmart and cut it to size, the problem i can see with the filter you are mentioning is it would probable restict the air flow enought to cause overheating, those are designed for vacum cleaners with alot of air flow suction and not our small 12v fans.

Joe

TheAxeMaster, on Jul 5 2005, 08:17 AM, said:

I have heard plenty of people talk about how big of a pain it is to keep their fresnels clean, yet I have see no topics on air filtration.  So, if anyone has done it, post your solutions here.

What I am planning to do is build a small air box on the side of my projector and use these newer hepa vacuum filters (see attached picture).  They are nice because of their size (the one on the vacuum I have is about an inch wide and maybe 7 or 8 inches tall).  I was thinking that you could also just build your box a bit longer and leave enough space between the LCD and fresnel and mount the thing flush with the outside of the box.

I'll post some pictures of what I'm talking about for my install ideas later today.

<{POST_SNAPBACK}>

[davehtr]

i picked up some 3m allergy filter from HD i hope it does the trick

[scubasteve2365]

davehtr, on Jul 5 2005, 03:20 PM, said:

i picked up some 3m allergy filter from HD i hope it does the trick

<{POST_SNAPBACK}>

the problem with the fresnels getting dirty is dust .....that over time manages to make it to the lenses ....

and air filter doesnt really help that much, because these boxes we make arent exact air tight .....the fact that the enclosure itself is made of wood contibutes to the dust, because come from it .....

[TheAxeMaster]

I was also kicking around using a larger automotive air filter (the rectangular ones). I saw a thing once that was advertising K&N air filters for cars that was run by one of those little 12v fans and it moved a lot of air with little noise. The oil in the filter may be an issue with K&Ns, but a regular air filter for a car might work ok.

Joe are you talking about those black foam filters like A/C window units use?

[joecnc2006]

TheAxeMaster, on Jul 5 2005, 03:01 PM, said:

Joe are you talking about those black foam filters like A/C window units use?

<{POST_SNAPBACK}>

Yes I double it over and works well, you can see the dust form on the quickly, so i know it works, and all you do is take it out rinse it off and use it again.

Joe

[Mikau]

couldn't you use stockings and stretch them really thin?

[fastscirocco]

Mikau, on Jul 5 2005, 04:40 PM, said:

couldn't you use stockings and stretch them really thin?

<{POST_SNAPBACK}>

They are too porous...it'll go right through

[Pinky]

Finally something I can talk about with some amount of knowledge. I 'm a sales rep for an air filter manufacturer. The 3M idea is not too bad, I have my stereo cooled and filtered using a similar material to that of the 3M with very few issues about restriction (it's works pretty well because it has an electrostatic charge). The AC foam (or black foam) is ok but not very efficient at trapping the smaller particulate (nice that it's reusable though). The choice of material depends on how large you want to make the filter housing/holder, how often you want to replace it, and how worried you are about dust. I will likely use the 3M style material for my pj (when I finally build it - sigh).

[TheAxeMaster]

do you mean 3M style filters such as home A/C filters? Or the vacuum filters?

[DeathRay64]

fastscirocco, on Jul 5 2005, 02:30 PM, said:

Mikau, on Jul 5 2005, 04:40 PM, said:

couldn't you use stockings and stretch them really thin?

<{POST_SNAPBACK}>

They are too porous...it'll go right through

<{POST_SNAPBACK}>

I have to agree with Mikau here. Pantyhose make a great filter(not my idea, I forgot who I should thank). There is a fine weave that is interspersed with little fibers that will catch almost all of the dust with very low restriction(very important!). For high flow and good filtration, pantyhose cannot be beat and it's washable. Get the flesh colored kind not the sheer kind.

[butters]

just my 2 cents.. i use pantyhose on my computer intake fans and it picks up alot of dirt and dust, really helps keep the inside clean.

[jmrguy]

Don't they make black pantyhose? Would that be useful for putting over the outtake fans in the back to block light, or would it block too much air from passing through?