Re: Air filter

Dear Chris W:

"Chris W" <1qazse4@xxxxxxx> wrote in message
news:vTF5f.6887$OM4.6182@xxxxxxxxxxxxx
> N:dlzc D:aol T:com (dlzc) wrote:
>
>>Dear Chris W:
>>
>>"Chris W" <1qazse4@xxxxxxx> wrote in message
>>news:t4w5f.6834$OM4.679@xxxxxxxxxxxxx
>>
>>>I am planing on getting a room air filter to help keep my
>>>computer room in my house cleaner so I don't get so
>>>much dust buildup on the heat sinks and preventing
>>>proper heat dissipation.
>>>
>>
>>This dust is largely from dead skin cells, unless you use
>>an evaporative cooler all the time.
>
> There is a lot more than just dead skin cells in the dust
> here.

Perhaps. Is this computer room close to an outside door? If
not, keeping the floor clean in perpheral rooms will cut this
extra source down.

>>>To help maximize the life of the HEPA filter, I am planing
>>>on installing some kind of pre filter on the heating vent in
>>>the room.
>>
>>Bad idea, because you are still in the room... making dust.
>
> There is a lot more dust in the rest of the house that gets
> blown into this room through HVAC system.

Cleanliness is next to Godliness. This all passes *through* a
filter to get to the HVAC system, so if you'd concentrate on that
filter, then that extra source should be captured. Note that the
evaporator coil of most refirgeration units (condenser coil when
operating as a heater) is exposed to high air flow rates, and the
same dust, but doesn't load up like your computer internals. I
*think* you are confusing yourself with details.

I felt about gnats the way you do about dust. I carefully
screened several AC vents for several years (I ran evaporative
cooling). I had reduced airflow in the affected rooms, and
*still* had concentrations of gnats. No effect, except being
hotter. The screens stayed clear of *any* gnats... they weren't
coming from the AC system.

>>I'd recommend obtaining a small HEPA filter, a good
>>squirrel cage-type blower, and pressurizing the
>> computer case with highly filtered air.
>
> Well since we are talking about 3 computers and not
> 1 that is a lot of work, not to mention what a pain in the
> but to build when I can buy a room air filter. On top of
> that the dust on the computers is almost as annoying
> as the dust in the computers.

Annoying, but not damaging to the internals. Unless you open
them up frequently.

The single ducted "filtered-air source" for all the computers is
a good idea. There is usually an unpopulated fan port in the
center-back of a PC case.

The room air filter will capture particulates from the air... but
my crystal ball tells me you'll still have buildup unless the
filters capture air right at the installation point of the
computer(s).

Adding filters to *all* the return air vents in the system (the
house) might work, to keep the flow balanced. If it doesn't blow
the return duct off the AC unit. It will make the system less
efficient/effective.

If you only filter the return air duct in one room, you cut off
the air to that room. Regardless of filter size (within reason).
Try it yourself. Take 5 cheap room air filters and duct tape
them to form 5 sides of a box. Hold/attach them over the return
air vent for the room in question. You loose the momentum that
lets the air project into the room, and you severely reduce the
airflow. This room heats up, which defeats the cooling concept.
Additionally, you *still* will get buildup on the computer
internals.

Get one of those fancy liquid cooling packages, which
externalizes the CPU cooling. Then you can clean the fins more
easily. And you do not centralize the dust in that fashion
(inside the case).

My two cents worth. I'm not trying to be a smart-ass. You'll do
what you think is best.

David A. Smith


.

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