Comfort planning for the actual floor plan
For a Granite Bay property, start with the layout and the equipment serving each part of the building. Additions, separate wings and rooms with substantial glass need their own discussion; total floor area alone can hide a room-level comfort problem.
Identify each thermostat and which rooms it controls. Heco can then discuss whether the concern calls for a repair, airflow work, a zoning evaluation or a separate ductless solution, rather than assuming every space needs a larger central unit.
For thermostats, bring separate wings and room loads into the scope discussion. Replace the control when its condition or capabilities justify the change. If equipment or airflow is the real cause, address that fault rather than expecting a new display to restore comfort.