On Jan 2, 8:27*am, "Stormin Mormon"
wrote:
One thought that won't please you. There is likely to be a
lot of drywall dust in the evaporator, inside the furnace.
The air flow may be reduced by the drywall dust, which will
give you problems later.

The duct cleaning is a good idea. Also, a good idea to have
a HVAC service company pull the evaporator out and inspect /
clean it.

--
Christopher A. Young
Learn more about Jesus
*www.lds.org
.

"jdach" wrote in message

...
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


If it's that bad, I'd go with a duct cleaning and inspection of the
evaporator coils.
IF the coils are covered in it, which would seem likely, especially if
the AC was
in use, making them wet, then it will reduce the performance of the
AC.

Also, consider the filter possibilities. The choices will be limited
by the existing
filter holder, ie you can't put a 5" filter if all you have is a 1"
space. If you have
someone check the coils, ask them about options for either a media air
cleaner
or electronic. When considering filters, don';t just look at MERV
rating, which is
a mistake many people do. MERV tells you how small a particle it can
trap.
The other critical factor is how much resistance the
filter presents to air flow. A high MERV filter without enough
surface area can
significantly restrict the air flow.