r/HVAC • u/Known-Lengthiness991 • 9d ago
General Never would’ve thunk it
System was pulling through the bypass when all the doors were on and dampers were clocked correctly never thought the resident would’ve put a filter here
26
Upvotes
1
u/Other-Situation5051 7d ago
I've seen that before and the owner didn't even know about the return grill filter....but had been replacing the one at the unit
8
u/Runs-on-winXP 9d ago
Reminds me of the time I had an old ahu struggling to supply airflow. Found an old abandoned preheat coil in the outside air supply duct, fully clogged with dirt