Air treatment method and system

A living wall system for supporting living plants, comprising:

• a. a first living wall module having a first module body forming a first module plenum, the first module plenum having a first growth media port and a first duct port, the first duct port having a first duct port engaging surface;
• b. a second living wall module having a second module body forming a second module plenum, the second module plenum having a second growth media port and a second duct port, the second duct port having a second duct port engaging surface;
• and
• c. a system coupling joining the first duct port and the second duct port for joining the first module plenum and the second module plenum into a recirculation plenum, the system coupling having a coupling body having a first coupling engaging surface for interfacing with the first duct port engaging surface and a second coupling engaging surface for interfacing with the second duct port engaging surface;
• and
• at least one of the first coupling engaging surface and the first duct port engaging surface being a first impact absorbing surface, and at least one of the second coupling engaging surface and the second duct port engaging surface being a second impact absorbing surface.