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ASHRAE Standard 170-2021 Ventilation of Health Care Facilities

ASHRAE Standard 170-2021 Ventilation of Health Care Facilities

 

ASHRAE Standard 170-2021 Ventilation of Health Care Facilities includes significant improvements to the 2017 edition. Most notably, the 2021 edition incorporates content in support of the new frame-work introduced in 2017, which divided the standard into three distinct sections: hospital spaces, outpatient spaces, and nursing home spaces. The added content facilitates closer coor-dination between the standard and the Facility Guidelines Institute (FGI) documents, which, as of 2018, comprise three separate books:

  1. Guidelines for Design and Construction of Hospitals
  2. The Guidelines for Design and Construction of Outpatient Facilities
  3. Guidelines for Design and Construction of Residential Health, Care, and Support Facilities

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ASHRAE Standard 170-2021 Updates

As a continuous maintenance document, Standard 170 publishes addenda continually and updates on a four-year cycle in alignment with the FGI documents. Improvements to the 2021 edition include the following:

  1. Revised scope, with improved guidance on thermal comfort conditions providedASHRAE Standard 170-2021 Ventilation of Health Care Facilities
  2. Extensive modifications to address the Outpatient and Residential sections
  3. Addition of a new outpatient ventilation table to address nonacute-type spaces
  4. Extensive revisions to air filtration requirements
  5. Addition of new columns in the ventilation tables to prescribe filtration requirement and designate unoccupied turndown
  6. Expanded guidance on separation distance requirements for varied intake and exhaust arrangements, coordinating with related ASHRAE Standard 62.1 data
  7. Expanded requirements to allow airborne infectious isolation room exhaust discharge to general exhaust under certain conditions
  8. Improved guidance on space ventilation requirements needed for anesthetic gas use
  9. Clarification of Class 1/Class 2/Class 3 imaging in coordination with FGI
  10. Revised definition of “invasive procedure”
  11. Improved guidance related to behavioral and mental health

The committee appreciates the hard work invested in this edition by everyone who partici-pated. We are grateful for the partnership with FGI and other ASHRAE committees. The com-mittee also appreciates the feedback received from the public review and continuous maintenance proposal processes. Future input from the public is always welcome.

This standard does not constitute a design guide. Rather it comprises a set of minimum requirements intended for adoption by code-enforcing agencies. For wide-ranging guidance, we refer the user to ASHRAE Handbook—HVAC Applications, HVAC Design Manual for Hospitals and Clinics and the proposed ASHRAE Guideline 43, Operations Guideline for Ven-tilation of Health Care Facilities.

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ASHRAE Standard 170-2021 Ventilation of Health Care Facilities

ASHRAE Standard 170-2021 Ventilation of Health Care Facilities

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