Systems and methods for blower control in an HVAC system

A method of conditioning air within an enclosed space using a heating ventilation and air condition (HVAC) system including a humidity sensor, a blower in fluid communication with the enclosed space, and a controller having a processor and a memory, the method comprising:

• controlling, by the controller, the HVAC system to cool and dehumidify the air within the enclosed space according to a default setting in response to a command from a thermostat that monitors a temperature in the enclosed space;
• receiving, by the controller, a humidity reading from the humidity sensor;
• determining, by the controller, whether to operate the HVAC system to increase cooling efficiency of the HVAC system over control according to the default setting or to increase dehumidification efficiency of the HVAC system over control according the default setting based at least in part on the humidity reading;
• determining, by the controller, an operating speed for the blower to achieve the determined operation to increase cooling efficiency or operation to increase dehumidification efficiency;
• and
• continuing to control, by the controller, the HVAC system to condition the air within the enclosed space including operating the blower at the determined operating speed.

A controller for a heating ventilation and air condition (HVAC) system including a blower in fluid communication with an enclosed space, the controller comprising:

• a processor;
• and
• a memory, the memory storing instructions that when executed by the processor cause the processor to
• control the HVAC system to cool the air within the enclosed space in response to a command from a thermostat that monitors a temperature in the enclosed space, the control including operating the blower at a first speed to produce a first rate of airflow;
• receive a humidity reading from a humidity sensor;
• determine whether to continue operating the blower at the first speed or to operate the blower at a second speed to produce a second rate of airflow based at least in part on the humidity reading by:
• determining a range of the humidity reading from a plurality of humidity ranges, each humidity range of the plurality of humidity ranges being associated with a blower speed to produce an airflow rate;
• determining to continue operating the blower at the first speed if the first speed is the blower speed associated with the determined range humidity reading;
• and
• determining to operate the blower at the second speed when the first speed is not the blower speed associated with the determined range humidity reading, the second speed being the blower speed associated with the determined range humidity reading;
• and
• continue controlling the HVAC system to condition the air within the enclosed space while operating the blower at the first speed or the second speed based on the determination of whether to continue operating the blower at the first speed or to operate the blower at a second speed.