An existing 250,000 ft² commercial class A office building, for which our team provided system validation and air flow measurement, recently received its LEED® EBOM certification.  Our team validated the ventilation system and measured the amount of ventilation air provided to the building through the HVAC systems, in order to verify the building met the minimum ventilation requirements per ASHRAE Standard 62.1.  Our team also performed the required ASHRAE Standard 62.1 calculations.