On Feb 17, 9:16*am, wrote:
On Feb 17, 2:56*am, David Nebenzahl wrote:



On 2/16/2010 8:59 PM DerbyDad03 spake thus:

I was looking at one of these "permanent" furnace filters at the Borg
the other day:

http://www.webproducts.com/Detail.bok?no=37

My question:

After you rinse one of these can you put back in while it's still wet
or should you keep a spare "regular" filter on hand while the
electrostatic one dries out?

Dunno, but funny thing: just today I helped a client who had washed out
his electrostatic filter units and couldn't figure out how to get them
back in. But these were the real McCoy, part of a Honeywell
electrostatic unit--you know, like with 20,000 volts and all.

How do these so-called "electrostatic" filters even work? There's no
source of electricity, so they must depend on some kind of static
charge. I can't believe they can be very effective.

That's what I was wondering as well. * Bottom line is whether these
filters really have some benefit or are just using the alleged
electrostatic feature as a marketing hype, hoping people think they
work like the real thing.

In any case, if I were using them, I'd probably let them dry out, at
least most of the way before putting them back in. * Seems that
wouldn't be hard to do if you clean them 2X a year when the ambient
temps are appropriate.



By the way, the real electrostatic units held just an incredible amount
of filth. Really black crap. (They hadn't been cleaned in a while.) So
they really work. And since they weren't quite dry, I advised my client
to dry them out first before putting them back in (we used a hair dryer).

--
You were wrong, and I'm man enough to admit it.

- a Usenet "apology"

"Seems that wouldn't be hard to do if you clean them 2X a year
when the ambient temps are appropriate."

Per the link I posted:

"simply rinse entire filter once a month then reinstall in system."

It doesn't say to dry them (or not) but at 12 times a year, leaving
them out to dry is probably going to mean at least a few furnace
cycles with no filter, especially in the winter.

If I bought one of those, I think I'd I keep a relatively inexpensive
one on hand for temporary use.