ASHRAE has released updated editions of its standards for ventilation system design and acceptable indoor air quality (IAQ).
ANSI/ASHRAE Standard 62.1-2019, Ventilation for Acceptable Indoor Air Quality, specifies minimum ventilation rates and other measures for new and existing buildings to foster IAQ that is acceptable to human occupants and that minimizes adverse health effects.
Significant changes include:
· New tables of ventilation rates per unit area for checking new and existing building ventilation calculations
· Simplified version of the Ventilation Rate Procedure
· Modified Natural Ventilation Procedure calculation methodology
· Revised scope to specifically identify occupancies previously not covered
· New requirement that natural ventilation consider the quality of the outdoor air and interaction of the outdoor air with mechanically cooled spaces
· Humidity control requirements now expressed as dew point instead of relative humidity
The 2019 edition of Standard 62.2 adds a compliance path that gives credit for particle filtration, distinguishing between balanced and unbalanced ventilation system interactions with natural infiltration. The standard also requires compartmentalization limits for new multifamily dwellings, and allows for single-point envelope leakage test results to be used when calculating infiltration credit.
Related Stories
Codes and Standards | Jul 16, 2018
Length of North American construction disputes continues to increase
They already far exceed global average.
Codes and Standards | Jul 12, 2018
Developer says net zero Salt Lake City apartment high-rise built at standard cost
Off-site solar, and mechanical/electrical system savings aid the achievement.
Codes and Standards | Jul 11, 2018
D.C. local worker requirement not being met
Government doing little to verify self-reported project data.
Codes and Standards | Jul 10, 2018
Carbon emissions in cement production threaten GHG reduction goals
Cement is essential to many infrastructure projects that address climate change.
Codes and Standards | Jul 10, 2018
DOE’s Better Buildings Summit to be held in Cleveland, August 21-23
Agenda includes technical training and networking opportunities.
Codes and Standards | Jul 6, 2018
Houston’s lessons learned from Harvey include lack of awareness by residents of flood danger
Inconsistent regulatory environment also cited.
Codes and Standards | Jul 6, 2018
Delos and HDR will co-develop wellness design tools and collaborate on research
WELL Building Standard pioneer teams with architects to advance wellness innovations in the built environment.
Codes and Standards | Jul 5, 2018
BREEAM New Construction standard launched in U.S.
Follows successful launch of BREEAM In-Use standard.
Codes and Standards | Jun 29, 2018
Nearly half of nonresidential construction projects now delivered by design-build
‘Alternative’ method now mainstream for nonresidential, highway/street, and water/wastewater construction projects.
Codes and Standards | Jun 28, 2018
Modular construction may be key to relieving housing crunch
May be only way to meet needs as ranks of construction workers decline.