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
| Sep 11, 2013
White paper examines Joint Commission requirements for NFPA codes in healthcare
The healthcare industry has experienced great attention from The Joint Commission concerning fire and life safety issues.
| Sep 11, 2013
San Francisco expected to drop firefighter air tank refilling station rule for skyscrapers
San Francisco is poised to drop a requirement that skyscrapers have refill stations so firefighters can recharge their air tanks during a blaze. The city has required that new high-rises have the air refill systems for about ten years.
| Sep 5, 2013
State legislatures continue to raise the bar on green school construction
Since the beginning of 2013, the USGBC has followed more than 125 bills across 34 states that seek to advance healthy, high-performing schools.
| Sep 5, 2013
Construction industry groups create coalition to respond to new OSHA silica rule
A group of 11 construction trade associations has created the Construction Industry Safety Coalition in response to the Occupational Safety and Health Administration’s (OSHA) proposed rule on silica for the construction industry.
| Sep 5, 2013
Red tape delays California county jail construction projects
California authorized $1.2 billion for jail construction in 2007, but not a single county in the state has completed a jail project since then.
| Sep 5, 2013
New CM-at-risk and design-build options create controversy in Ohio
Some contractors say Ohio's new system puts small and midsize construction companies at a disadvantage.
| Sep 5, 2013
Outdated codes slowed disaster recovery in Tuscaloosa, Ala.
Outdated building codes and lack of a master plan slowed the initial rebuilding stage after a devastating tornado leveled parts of Tuscaloosa, Ala. in 2011, according to the city’s mayor.
| Aug 28, 2013
Building collapse prompts legislation to beef up demolition regulations in Philadelphia
Philadelphia City Council will introduce legislation next month to strengthen the regulation of building demolition practices.
| Aug 28, 2013
Rules requiring contractors to boost hiring of veterans criticized
Some businesses are pushing back against proposed rules requiring federal contractors to step up their hiring of returning military service personnel.
| Aug 28, 2013
OSHA moves to reduced exposure to crystalline silica
Under a proposal from the Occupational Safety and Health Administration, the new permissible exposure limit to crystalline silica per cubic meter of air could be changed from 250 micrograms to 50 micrograms.