Quote:
Originally Posted by Michael G.
I used a filter in my return vent (1") in the hallway between the bedrooms until I had a complete
new HVAC.
The installer said use the 4" filter on the new unit and Never use the one in the return vent
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From OP. Great. Thanks all. I was concerned that the build of our home HVAC was wrong. A couple Sales guys for equipment said it was odd that our house did not have additional filters in the returns.
Just shows what they
-don't- know. Now I know. Thanks again for the clarity.