I'm not trying to be a ball breaker here but
It does seems impossible as described and as I understand the issue.
On one hand we have excessive noise. Which typically results from a lot of air flow.
On the other hand we have the description that air is flowing Out of the return duct.
I am just having a problem reconciling that both things are happening simultaneously. <g>
And let's go back to wht I said originally - let's make sure that you do, in fact; have the correct air flow to start with.
Then, if you do, we can start on how to first minimize the noise, and then to break the sound-path of the noise, if neccessary.
QUOTE=caslon;1925488]First of all, I know it sounds wierd, but I am guessing you CAN have an uptake of air at the return and at the same time some kind of backpressure or whatever where you can feel air being driven back down into that return cavity and out of the grill. We can go no further if you think this is an absolute impossibilty.
Second of all, I am a painting contractor, not an HVAC contractor, so I may have jumped ahead as to what is causing it or the mechanics of it all. Sorry.
It's almost as if there IS air being correctly sucked in, but at the same time, so much so that some is actually being forced back down into that same return area.
Trust me when I say I can feel air being expelled from the return intake grate.
That air rises up to the thermostat directly across from the intake grate and affects the current reading temp of the thermostat.
At least read back my entire post, all of you. Someone reads my latest post and tells me to get a bigger intake grill, then repeats the same suggestion.
Any and all info you want me to provide, I will. Read back to the beginning and at least check out my freaking pics.[/QUOTE]
Let's not jump to any hasty conclusions here! <g>
But how about this -
Can you make a piece of paper move Away from the return by holding it where you feel the air coming out?
I ask because sometimes it does feel like air is flowing out - when it is flowing in. You feel the air on the back of your hand and mis-interpret what is actually happening.
And I'm just trying to help here - let's just walk this thing through. <g>