On Sat, 1 Jan 2011 16:29:12 -0800 (PST), jdach
wrote:

Air Quality Question By Jeffrey Dach

The previous occupants of the apt unit apparently did not change the
air conditioning filter after an extensive dry wall build out. We
went ahead and replaced the old AC filter which was caked with dry
wall dust .
In addition, fine particles of dry wall dust are visible coming out of
the air vents when the air is on. These are most visible on reflective
metal surfaces which show the fine particles that have accumulated
when viewed at an angle. Options here are 1) place additional filters
on the A/C vents to stop the particles from coming out
2) Some type of duct cleaning and sealing procedure.to remove the
debris which spilled out into the duct work after the dry wall build
out
Any suggestions would be apreciated. regards jeffrey dach

A duct cleaning would be my suggestion. My first experience having
this done was a bad one.

Recently had one done by this company for my current home. I'm
totally satisfied with the service, employee professionalism and the
quality of the work. They have the "right equipment".

No affiliation, except a satisfied customer..

http://www.onehourheatandair.com/