HVAC opening for return air flow sanity check
Have an inspection report that claims the return air flow for the HVAC system may be too small and the contractor (ASI Hastings) should have opened it before installing. I checked out ASI and they appear to be a very reputable company from what I can tell.
This leads me to the question. Is there a spec on these units (this one is a split system) for minimum cutout and even though this looks bad in the inspectors report it may be within spec? I just can't believe this company would do something this wrong so just wanted a sanity check from the web! The unit is pretty new (around 4 years old) Thanks.
Here is a picture of the opening: