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 | Oct 10, 2017
New guidelines for quality control on application of membrane roof systems released
NRCA document provides guidance for on-site evaluation.
Codes and Standards | Oct 9, 2017
New app calculates maximum allowable heights for building occupancy types, classes of construction
The app streamlines compliance on various types of construction.
Codes and Standards | Oct 5, 2017
California lawmakers pass bill that requires GCs to pay wages of sub employees if subs fail to pay
The measure will go into effect in January if the governor signs it.
Codes and Standards | Oct 4, 2017
Ambitious but realistic increase in clean energy would cut GHG emissions by 80% in the U.S.
NRDC report says goal can be achieved with existing tools.
Codes and Standards | Oct 3, 2017
Reducing duct leakage is focus on latest green building standards updates
ASHRAE 189.1 broadens testing requirements to include more types of ducts.
Codes and Standards | Oct 2, 2017
Nationwide retrofit strategy in Canada could cut 51% of emissions from large buildings
The roadmap provides government and industry with a targeted plan.
Codes and Standards | Sep 28, 2017
Resources available for new OSHA respirable crystalline silica regulation
NRCA offers compliance tools for contractors.
Codes and Standards | Sep 28, 2017
New tool compares HVAC system efficiency
IAPMO and Hydronics Industry Alliance unveil BEST to evaluate systems in early design phase.
Codes and Standards | Sep 26, 2017
Anti-drone technology can ward off unauthorized drone flights
The technology can be used to prevent terrorist attacks and spying.
Codes and Standards | Sep 25, 2017
How-to guide to renovating shopping centers available
E.U. research project focuses on energy efficiency and occupant comfort.