Hi, I have a P3HUA12N04801C in the condo that I bought recently. Somehow it seems that the HVAC air filter part was not installed correctly.
The filter that comes with the unit was installed at the dead end side of the unit, please see http://dl.dropbox.com/u/15481782/IMG_0240.JPG and http://dl.dropbox.com/u/15481782/IMG_0239.JPG, the green scotch brite like filter is on the left side of the unit. But the return air comes from the opposite (right) side of the unit. So I installed a return grill and a flander naturalaire filter bought from Home Depot, please see http://dl.dropbox.com/u/15481782/IMG_0246.JPG. The furnace works fine, but seems dusty, as I noticed moderate amount of dust on my desk in the morning.
I am a novice, just wondering whether I installed the air filter correctly, in the right place with the right filter? It states in the user's manual that a high velocity filter is required, but I could not find any scotch brite type filter at the Home Depot.
Also, the HVAC unit sounds noisy, it is located in my living room so it is a little annoying, is there anyway to reduce the noise, or do I need to grease or replace certain parts?
Any help will be highly appreciated!