On Sat, 11 Oct 2014 09:23:36 -0700, Bob wrote:

Hello,

Have been using the 3M (Red) Micro Allergen filter with the 1000 rating
for many, many years.

Have develped Asthma, and would like to step up to a "better" one with
the superior filter properties.

Furnace (hot air type) is fairly old, and can't find specs on it.

Do you think I have anything to worry about regarding the larger
pressure drop these "better" ones have, and its impact on the
blower fan performance, life, or safey ?

Thoughts ?

Thanks,
Bob

From personal asthma history/experience, GET AN ELECTROSTATIC FILTER! Best
are those very quiet portable, room types. If you can get built-in is ok,
too.