[LIST=1] [*]I bought my condo with its air handler (Unitary AHP30B3XH21A) a year ago. Recently, the unit has started to be quite loud when not running. [URL="http://lahat.org.il/misc/AC_noise.mp3"]You can hear it here[/URL]. It could go on for hours and hours, even if the A/C has been turned off all day. Is it normal? What would it be? I do have units above and below me, I wonder if it could be an issue with their A/C. [*]Also.. I'm trying to figure out if I have a drain pan: my unit is installed on top of a sheet metal base. Where it says "[U]filter door[/U]" (see diagram below) I have nothing, but the unit is installed in a cabinet that has an intake vent with a filter. When I bought the condo there was an aluminum pan on the floor underneath the unit, it was rattling and I threw it away. The area underneath the unit has always been bone-dry. When I look up through the base I can see the A-coils. I think there are drains at the edges of the unit. Do I have drain pans? Should I? Is it related at all to the first issue? [/LIST] Thanks! [IMG]http://www.lahat.org.il/misc/AHP30B3XH21A.jpg[/IMG]

Hello, I work in an office with three older style aluminum air / heat vents mounted in the ceiling. One of them in the middle of the office is wide open while the other two are barely open. We want to set all three in a middle position. I have worked with the newer style diffusers with the little square key, these are different. They have a spoon-like slider in one corner, but on all three vents I cant seem to move it. Do you push or pull or slide them? There are two screws on one side of the vent plate, I assume this is how I would swing the vent down? Anyone with experience on these older style vents please help out! The air distribution in here is awful with some spots hot and some freezing cold. Plus the wide open vent is rattling from all the excess air passing through. THANKS! [ATTACH]55867[/ATTACH]