Patent ID: 11865487
Assignee: TRANE INTERNATIONAL INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  F | IPC B  F

Claim 18:
19. A switchable filtration system for a heating, ventilation, air conditioning, and refrigeration (HVACR) system, the filtration system comprising:
a first filter;
a second filter;
a switching apparatus; and
a controller,
wherein the controller is configured to determine whether a space is ready for a pre-occupancy purge or a post-occupancy purge based on a first predetermined schedule,
wherein during the pre-occupancy purge or the post-occupancy purge, when a first measured condition exceeds a first predetermined threshold, the controller controls the switching apparatus to switch the first filter into an active airflow path; and when the first measured condition is at or below the first predetermined threshold, the controller controls the switching apparatus to switch the first filter out of the active airflow path.