HVAC zoning devices, systems, and methods

An HVAC control system configured to control an HVAC system of a building, wherein the HVAC system comprises a forced air conditioning system with a fan and includes ducts configured to carry air of the forced air conditioning system, a plurality of register vents in fluid communication with the ducts, two or more electronically controllable dampers, each of the two or more electronically controllable dampers having an electronically controllable damper opening size, the HVAC control system comprising:

• two or more sensors configured to sense an environmental parameter at two or more different locations in the building;
• and
• a controller in operative communication with the two or more sensors, the two or more electronically controllable dampers, and one or more HVAC components of the forced air conditioning system,
• the controller being further configured to control the one or more HVAC components of the forced air conditioning system and a damper opening size of at least one of the two or more electronically controllable dampers based, at least in part, on:
• the sensed environmental parameters;
• and
• a damper opening size for another one or more of the two or more electronically controllable dampers such that a sum of damper opening sizes of the two or more electronically controllable dampers remains above a minimum damper opening size threshold when the fan is activated.

An HVAC control system configured to control a zoned HVAC system of a building, the zoned HVAC system including one or more HVAC components configured to provide conditioned air to one or more HVAC ducts of the building, the one or more HVAC components including a fan and a plurality of electronically controllable dampers configured to control delivery of the conditioned air from the one or more HVAC ducts into each of two or more zones of the building, each of the two or more zones of the building having at least one sensor for sensing a sensed condition in the corresponding zone, the HVAC control system comprising:

• a communications block configured to receive a measure related to the sensed condition from each sensor in the two or more zones of the building;
• and
• a controller operatively coupled to the communications block, the controller configured to receive the measures related to the sensed condition from each of sensors via the communications block, and in response:
• electronically control a damper opening size of each of the plurality of electronically controllable dampers in accordance with a damper setting;
• determine a damper setting for a first damper of the plurality of electronically controllable dampers based, at least in part, on a damper setting for a second damper of the plurality of electronically controllable dampers such that a sum of the damper opening sizes of the plurality of electronically controllable dampers remains above a minimum damper opening size threshold when the fan is activated;
• transmit, via the communications block, the determined damper setting for the first damper of the plurality of electronically controllable dampers to the first damper;
• and
• provide one or more control signals to activate at least one of the one or more HVAC components.