What about in-line duct fans or even register fans in the rooms that are not heated/cooled appropriately: https://www.amazon.com/AC-Infinity-Register-Thermosta

What about in-line duct fans or even register fans in the rooms that are not heated/cooled appropriately: https://www.amazon.com/AC-Infinity-Register-Thermostat-Control/dp/B0792QR5YT/ref=asc_df_B0792QR5YT/ https://www.amazon.com/AC-Infinity-Register-Thermostat-Contr... Appropriately placed In-line duct fans and register fans will pull the heated/cooled air where you want.