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Seeking Opinions on air return filters and air vent filters No Way 06-04-2007
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Posted by Joe on June 4, 2007, 8:47 pm
> I see many of these being sold at Home Depot and other home
> improvement centers and was wondering whether using these filters
> would put too much stress or strain on the air circulation fan, the
> furnace and the central A/C system at all? I'm talking about the
> vents only inside the house and not the ones outside.
>
> I'm thinking that these systems are designed with being able to
> perform without any obstructions in the vents and while these filters
> are supposed to let sufficient air through, if I place them in very
> vent in my house, perhaps that might impose too much strain on the
> circulation fan, the furnace and the central A/C?
>
> Thoughts? Thanks for your time and courtesy.

You can't suspend the laws of physics. Every impediment to the the air
flow slows it down and imbalances the system. Your AC or heat may be
fine with a slower air flow, but you will also come up aganst the law
of diminishing returns as regards efficiency, longevity and operating
cost. If there is no obvious need for change, let it ride. HTH

Joe


Posted by Edwin Pawlowski on June 4, 2007, 9:56 pm

>I see many of these being sold at Home Depot and other home
> improvement centers and was wondering whether using these filters
> would put too much stress or strain on the air circulation fan, the
> furnace and the central A/C system at all? I'm talking about the
> vents only inside the house and not the ones outside.
>
> I'm thinking that these systems are designed with being able to
> perform without any obstructions in the vents and while these filters
> are supposed to let sufficient air through, if I place them in very
> vent in my house, perhaps that might impose too much strain on the
> circulation fan, the furnace and the central A/C?
>
> Thoughts? Thanks for your time and courtesy.

Given the velocity of the return compared to the feed, I doubt you'd catch
much at all. If the regular filters are doing their job, return filters are
not needed. An filter will offer some restriction. I'd not do it.



Posted by geothermaljones on June 4, 2007, 11:40 pm
As long as you replace/clean them monthly,they shouldn't add too much static
to the system...
If you have a decent pleated filter in the return, they're probably a waste
of money.
Go out & buy a case of decent filters & swap in a new one every time the
utility bill shows up.
Filtrete has the brand name & the price too.
I pick up a case of near identical Z-pleats at the wholesale house & the
cost under 3 Bucks per...
I had a guy tell me to spray the filter with Pledge furniture polish for
better filtration, but I'm not sold on that idea.

goodluck
geothermaljones
st.paul,mn.



> I see many of these being sold at Home Depot and other home
> improvement centers and was wondering whether using these filters
> would put too much stress or strain on the air circulation fan, the
> furnace and the central A/C system at all? I'm talking about the
> vents only inside the house and not the ones outside.
>
> I'm thinking that these systems are designed with being able to
> perform without any obstructions in the vents and while these filters
> are supposed to let sufficient air through, if I place them in very
> vent in my house, perhaps that might impose too much strain on the
> circulation fan, the furnace and the central A/C?
>
> Thoughts? Thanks for your time and courtesy.



Posted by on June 5, 2007, 12:04 am

> As long as you replace/clean them monthly,they shouldn't add too much
static
> to the system...
> If you have a decent pleated filter in the return, they're probably a
waste
> of money.
> Go out & buy a case of decent filters & swap in a new one every time the
> utility bill shows up.
> Filtrete has the brand name & the price too.

Problem is, most return ducting won't allow a customer to drop in a pleated
filter and still have the required CFM's for the system to operate
efficiently and without shortening the life of the equipment.




Posted by BillGill on June 5, 2007, 9:12 am
kjpro @ usenet.com wrote:

> Problem is, most return ducting won't allow a customer to drop in a pleated
> filter and still have the required CFM's for the system to operate
> efficiently and without shortening the life of the equipment.
>
>
>

I'm afraid I don't understand the problem here. Most
filters are in the return air plenum. Most modern
systems are designed for pleated filters. So why would
there be a problem with putting pleated filters in the
return?

With my old system I kept on using the old fashioned
(and cheap) fiberglass filters, but it was designed for
them and I didn't want to take a chance on messing up
the system.

Bill Gill

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