ASHRAE+62.1-2022+(1) - Page 047
Extracted Content
(This is a normative appendix and is part of the standard.)
NORMATIVE APPENDIX D VENTILATION RATES FOR OUTPATIENT FACILITIES NOT COVERED BY ASHRAE/ASHE STANDARD 170
D1. GENERAL
This appendix presents minimum ventilation rates in breathing zones for spaces in outpatient facilities to which the AHJ deemed ASHRAE/ASHE Standard 170 not applicable.
D2. VENTILATION RATES
For zones in outpatient facilities not covered bay ASHRAE/ASHE Standard 170, ventilation zone parameters shall be determined in accordance with Sections 6.2.1.1 through 6.2.1.3 using the rates in Table D-1.
Table D-1 Minimum Ventilation Rates in Breathing Zone (Continued)
People Outdoor Air Rate ( Rp )
Area Outdoor Air Rate ( Ra )
Default Values
Occupant Density
OS (6.2.6.1.4)
Air Class
Occupancy Category
Outpatient Health Care Facilities [ a,b]
cfm/ person L/s· person cfm/ft [2] L/s·m [2] #/1000 ft [2] or #/100 m [2]
Birthing room 10 5 0.18 0.9 15 2
Class 1 imaging rooms 7.5 3.8 0.12 0.6 5 1
Dental operatory 10 5 0.18 0.9 20 1
General examination room 7.5 3.8 0.12 0.6 20 1
Other dental treatment areas 5 2.5 0.06 0.3 5 1
Physical therapy exercise area 20 10 0.18 0.9 7 2
Physical therapy individual room 10 5 0.12 0.6 20 2
Physical therapeutic pool area - - 0.48 2.4 - 3
Prosthetics and orthotics room 10 5 0.18 0.9 20 2
Psychiatric consultation room 5 2.5 0.06 0.3 20 1
Psychiatric examination room 5 2.5 0.06 0.3 20 1
Psychiatric group room 5 2.5 0.06 0.3 50 1
Psychiatric seclusion room 10 5 0.12 0.6 5 1
Speech therapy room 5 2.5 0.06 0.3 20 1
Urgent care examination room 7.5 3.8 0.12 0.6 20 2
Urgent care observation room 5 2.5 0.06 0.3 20 2
Urgent care treatment room 7.5 3.8 0.12 0.6 20 2
Urgent care triage room 10 5 0.18 0.9 20 3
a. The requirements of this table provide for acceptable IAQ. The requirements of this table do not address the airborne transmission of viruses, bacteria, and other infectious conta gions. b . These rates are intended only for outpatient dental clinics where the amount of nitrous oxide is limited. They are not intended for dental operatories in institutional buildings where
nitrous oxide is piped.
ANSI/ASHRAE Standard 62.1-2022 45