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ASHRAE publishes updated health care facility ventilation standard

ASHRAE has released an updated edition of ANSI/ASHRAE/ASHE Standard 170, Ventilation of Health Care Facilities. The standard offers guidance, regulation, and mandates to designers of health care facilities.

The 2021 edition delivers critical guidance for designers and operators of these front-line facilities and incorporates 17 addenda to the 2017 edition of the standard. Changes include:

  • Expanded requirements to allow airborne infectious isolation room exhaust discharge to general exhaust under certain conditions.
  • Revised scope, with improved guidance on thermal comfort conditions provided
  • Extensive modifications to address the Outpatient and Residential sections
  • Extensive revisions to air filtration requirements
  • Addition of new columns in the ventilation tables to prescribe filtration requirement and designate unoccupied turndown
  • Expanded guidance on separation distance requirements for varied intake and exhaust arrangements, coordinating with related ASHRAE Standard 62.1 data
  • Improved guidance related to behavioural and mental health

To purchase ANSI/ASHRAE/ASHE Standard 170-2021, Ventilation of Health Care Facilities, visit the ASHRAE Bookstore or contact ASHRAE Customer Service.

Most notably, the 2021 edition incorporates content in support of the new framework introduced in 2017, which expanded the standard into three distinct sections: hospital spaces, outpatient spaces, and residential healthcare spaces in alignment with the Facility Guidelines Institute (FGI) publications.