Multifamily units in all types of buildings are now covered in the scope of ASHRAE’s residential indoor air quality standard, marking one of the biggest changes to the recently published 2016 version. ANSI/ASHRAE Standard 62.2-2016, Ventilation and Acceptable Indoor Air Quality in Residential Buildings, defines the roles of and minimum requirements for mechanical and natural ventilation systems and the building envelope intended to provide acceptable indoor air quality in residential buildings. Prior to this edition multifamily residential buildings four stories or above fell under the scope of ANSI/ASHRAE Standard 62.1, Ventilation for Acceptable Indoor Air Quality.
As the government continues to aggressively regulate refrigerants, compressor manufacturers are actively evaluating alternative refrigerants for refrigeration applications. As they research the viability of low-GWP and other natural refrigerants, they face the concurrent challenges of ensuring compressors are efficient, safe, and reliable.