ASHRAE 90.1-2019 Compliance

The updated ASHRAE 90.1-2019 standard creates more stringent lighting and HVAC control requirements
for commercial buildings than the previous 2013 version. The U.S. Department of Energy (DOE) has named
ASHRAE 90.1 as the national energy reference standard. As such, all states in the United States must put
into effect a commercial building energy code at least as stringent as the ASHRAE 90.1-2013 version by
September 26, 2016. The updated standard still applies to all new construction projects and retrofit
projects with alterations greater than or equal to 10% of the connected lighting load.
Changes in the ASHRAE/ANSI/IES 90.1-2019 pose a tougher stance on interior lighting power allowances,
further tweaking of already stringent control requirements and integration of all commissioning
activities into a series of building commissioning activities. Changes also offer a new, simplified Building
Area Method which can be used for interior and exterior lighting calculations for new buildings and
tenant improvements under 25,000 sq ft. To comply, the designer simply consults a series of tables
listing various applications in office, retail, and school buildings along with maximum lighting power
allowances and applicable mandatory control requirements. Some specific changes include: