On 4 Jun 2005 08:18:53 -0700, firstname.lastname@example.org wrote:
For what its worth, after nixing an electronic filter on account of
cost, and "sticky" treated filters on account of cost and reduced
airflow, my solution is to spray a light coat of cooking oil on the
cheapie regular fiberglass filter. My theory is that the oil will
retain dust particles better than a plain filter. I get to change
the filters more often and thus remove the dust permanent instead of
letting it be blown back into the ducts and air. I only did this last
month when the weather no longer required the furnace to run. I
should know when the weather gets cold again whether there is any
problem having cooking oil on the filter for an extended period and
whetehr it picks up dust and better.
The fiberglass filters come from the factory with a coating already on
the filters. They are called viscous impingement filters. Spraying them
with oils not necessary, but will not hurt.
My concern is when I change the regular furnace filter the dust on it
is dry, loose and easily blown back into the ducts. But if there is an
oil stain anywhere in the house the dust particles get stuck on the
oil stain. Hopefully the dust particles will stick better to an oil
coated furnace filter.
An idea that just came to mind is to have a small heated oil reservoir
infront of the filter element. The concept is everytime the furnace
fires up the heater element will be switched on to vaporize a little
oil and deposit a fresh sticky coat. The vapor will be deposited onto
the filter by the air drawn into the furnace.
Cooking oil deposits inside the ducting is likely a health and
maintenance concern. But what about aromatic oils meant for household
use, as in those wall plug-in gizmos? In fact it is easy enough to
install several of these vaporizers in the cold air return plenum and
tie that to the furnace ON circuit. The vapor may do a double duty of
helping to attract dust onto the filter element first before doing its
original purpose to make the rooms smell nice.
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