We have a new home built last spring. 2400 sqft. with gas heat and AC. 1 HVAC system with Honeywell zone controls and ecobee’s on each floor with remote sensors for bedrooms and living areas. Nashville TN area.
We had some issues with balanced air flow especially with the 2nd floor being much colder in summer and hotter in winter. HVAC contractor came out last month and rebalanced all the supplies, added a bypass zone on the unit itself and installed an additional return on the 1st floor. Now we have three returns on 1st floor and one return on the 2nd floor. We added a large ceiling fan to the two story living room that opens to the loft and hallways on the second floor. The house feels much more balanced now between floors.
So after all this do my charts indicate a system that is running well? BTW not sure why there is no slope for heat on the 2nd floor.