Patent ID: 11934166
Assignee: BUILDING LENS INC.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method to manage air quality in a space, comprising:
a processor;
sensors to collect air flow data, energy consumption data, and air quality data in the outdoor air dampers to control an outdoor air exchange rate;
a fan to control an air changes per hour (ACH);
an air damper to control an outdoor air fraction (OAF); and
code executed by the processor to:
receive air quality data from related building zones;
receive at one or more predetermined intervals at least one of government environmental and health data;
calculate an indoor contamination level and an outdoor contamination level by determining the number of particulate matters at or below 2.5 microns, fan speed data, damper position data, the air quality data from the related building zones, the government data, the air flow data, the energy consumption data, and the air quality data; and
when indoor contamination level is at or above 15 micrograms, mitigate health risk of an occupant of the space by:
when outdoor contamination level is at or below a low threshold of 15 micrograms, increase the OAF with the air damper;
when outdoor contamination level is above the low threshold and below a moderate threshold of 40 micrograms, decrease OAF with the air damper and linearly increase the ACH with the fan;
when indoor contamination level exceeds the outdoor contamination level, increase the ACH with the fan and OAF with the air damper; and
when the indoor contamination and the outdoor contamination are above a high threshold, increase the ACH with the fan and linearly decrease the OAF with the air damper.