so if i add a blowhole, should i install a filter of some sort on it?

I don't think filters are necessary on exhaust fans. only intakes. dust can't get in if the air is blowing out. And of course, you blowhole should be exhaust. Can't say iv'e ever heard of a blowhole that is intake. hell, then it wouldn't be a 'blow'-hole lol

no, cause its blowing out of the case, u could but it would be a waste, u should use filters on air coming into the case

no need for a filter unless u want to clean the air blowing back into your room....I personally dont have any filers at all....but i only have one fan....hummm

filters aren't a real necessity if you ask me, just buy a can of compressed air if you think the rig is getting a little dusty

I have an intake case fan in the front and an exhaust fan in the back. Do you think a blowhole will really help my temps?

my blowhole only helped my case temps from 30c to 25c and my processor temps like 1c if that

If you're thinking about buying a filter, you can pick up enough air conditioning filter (flat platte) to make filters for maybe a dozen 80mm fans for less than 2 bucks.

I have a 120mm blowhole in mine that works well. I think this is partially due to the fact that this motherboard has the cpu socket oriented so that cpu exhaust goes toward the front and back of my case, rather than up & down (into the PSU and onto the video card). So the exhaust blown towards the front gets sucked up and out the top.

I've always found the best results can be achieved by getting fresh air to the cpu. I have a 80mm on the side, directly over the top of the cpu fan, that dropped temps 5C.

I also have a 120mm blowhole, but because I already had adequate airflow, the temps did not drop any more than 1C at times. So If your running like 120's all around your case, with a side panel fan, then you probably wont get that much of a gain from it.

Its about balance. Make sure you have the same amount of air coming in as you have going out. The air flow through my case was already great so i didnt see that much of a drop but it does get rid of the hot air around the drives and generally keeps everything cooler. I have 5 120mm fans in my case so case temps is usually the same as the room its sitting in. I would do it if i were you.

Absolutely. I added a 120mm blowhole and dropped my tems 3 degrees celsius. All you have to do is make the blowhole exhaust and make your other two intakes. A little positive pressure wont hurt and hot air rises. My power supply was creating heat in the top of my case and couldnt exhaust it properly.

plus sence its getting close to winter.... ahhh i live in chipawau, wisconsin and there no snow here i am sooo mad i don't get to snowmobile,
if you hands get cold just put them on top of the blowhole ans warm them up

As far as a fan filter goes I'm against it. They restrict airflow and defeat the purpose of a fan. Just clean your computer once every 3 months or so. That is if you can stay out of it for that long. I know I cant. B)