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
| Feb 17, 2012
Comment period opens March 1 for LEED 2012 update
USGBC says that LEED's strength comes from its continuous evolution.
| Feb 17, 2012
OSHA training videos on proper respirator use available online
17 short videos to help workers learn about the proper use of respirators on the job.
| Feb 17, 2012
Union/employer collaboration on the rise aimed at exceeding OSHA safety standards
Unions have learned to help employers win contracts with bids made competitive through good safety practices.
| Feb 16, 2012
Gain greater agility and profitability with ArchiCAD BIM software
White paper was written with the sole purpose of providing accurate, reliable information about critical issues related to BIM and what ArchiCAD with advanced technology such as the GRAPHISOFT BIM Server provide as an answer to address these issues.
| Feb 9, 2012
Initiative to sell off under-used federal property gaining momentum
The bill is similar to a White House planto cut $8 billion worth of building costs by the end of the 2012 fiscal year, and to establish a panel to identify other sites worth selling or donating to nonprofits or state and local governments.
| Feb 9, 2012
Computer tool helps engineers design roof cladding using Canada's building code
Easier to design roof cladding that can withstand winds in a given area.
| Feb 9, 2012
Webinar focuses on lessons learned from LEED-certified industrial project
This case study will focus on strategies used to save the client money, achieve certification, and effectively market success once the project was complete.
| Feb 9, 2012
Rapid growth of zero energy buildings expected
Much of that growth will be in the European Union, where near-zero energy buildings are mandated by 2019 for public buildings, and by 2021 for all construction.
| Feb 9, 2012
Stiffer OSHA fines put strain on Kansas contractors
A fine for a violation that once cost between $750 and $1,200 now runs $7,000 or more per incident, according to a state industry association official.