System and methods for actively controlling an HVAC system based on air cleaning requirements

A method for automatically controlling a blower adapted to clean air comprising:

• monitoring a state of the blower over a given monitoring time period;
• determining a current cumulative length of blower operation during a given measurement time period throughout the given monitoring time period;
• determining if an amount of time left in the monitoring period is greater than zero;
• reducing, if the amount of time left in the monitoring period is greater than zero, the amount of time left in the monitoring period by an initial time of the given measurement period:
• determining an amount of desired remaining blower runtime based on the current cumulative length of blower operation and a desired minimum length of blower operation;
• activating the blower if the amount of desired remaining blower runtime is at least as long as an amount of time remaining in the monitoring time period.

A method of automatically controlling a blower to clean air through an HVAC system, comprising:

• monitoring a first call line from a control unit of the HVAC system for a presence or an absence of a blower call signal on the first call line over a given monitoring time period;
• determining an amount of accumulated run time that the blower of the HVAC system has been active in response to the presence or absence of the blower call signal on the first call line of the HVAC system over a given measurement time period throughout the given monitoring time period;
• determining if an amount of time remaining in the monitoring time period has expired;
• reducing, if the amount of time left in the monitoring period has not expired, the amount of time left in the monitoring period by an initial time of the given measurement period;
• determining a remaining amount of desired blower runtime in the reduced monitoring time period;
• determining if the amount of time left in the reduced monitoring period is greater than the remaining run time that the blower is to be active;
• and
• activating the blower if the remaining amount of desired blower runtime is not less than the remaining time of the reduced monitoring period.