Thankfully, we caught it during the plan review stage, and with a stamped structural design, they got the kitchen of their dreams—without jeopardizing safety or facing surprise delays.Here’s what to think about when renovating:Structural Changes: Even moving a wall can have ripple effects on the stability of your home.HVAC Systems: New layouts might need adjusted airflow or ductwork.Plumbing and Electrical: Moving sinks, showers, or outlets requires careful rerouting to comply with building codes.Before starting demolition or submitting permits, have your plans reviewed by a licensed engineer or architect to avoid costly surprises.

Another idea could be to see if the HVAC system can be adjusted or modified to better separate the airflow between the units.

I think I'm going to install one way air flows in the complaining tenants bathroom vents.

We don't do closets for better air flow and less chance of mold.  

Items cannot be stacked against wall prohibiting natural air flow to guard against mold, etc ?? 

I hear people talking about air flow etc.

Household furniture must be positioned and/or elevated to allow adequate air flow underneath and between furnishings and adjacent walls.

.$24.99 Zinus 1.5" memory foam topper Queen size - https://www.amazon.com/Cooling-Mattress-Airflow-CertiPUR-US-...We have these in our rental and they have been great.

Still need to clean it with regular household cleaning supplies, keep the dehumidifier running, and try to increase some air flow if possible. 

If the condenser is getting choked with seeds, leaves, and other debris, that will severely limit the air flow which actually can lead to overheating of the system.