A facility shall ensure its ventilating systems maintain temperatures, minimum air changes of outdoor air per hour, minimum total air changes, and relative humidities as follows:

1. (1) For operating rooms, sixty-eight to seventy-three degrees Fahrenheit or twenty to 22.8 degrees centigrade, three outdoor, twenty total, and twenty to sixty percent humidity;
2. (2) For delivery rooms, sixty-eight to seventy-three degrees Fahrenheit or twenty to 22.8 degrees centigrade, three outdoor, fifteen total, and twenty to sixty percent humidity;
3. (3) For recovery rooms, at least seventy degrees Fahrenheit or 21.1 degrees centigrade, two outdoor, six total, and twenty to sixty percent humidity;
4. (4) For nursery rooms, at least seventy-five degrees Fahrenheit or 23.9 degrees centigrade, two outdoor, six total, and twenty to sixty percent humidity; and

5. (5) For intensive care rooms, seventy to seventy-five degrees Fahrenheit or 21.1 to 23.9 degrees centigrade, two outdoor, six total, and twenty to sixty percent humidity.

   For all other occupied areas, the facility shall maintain a minimum temperature of seventy-five degrees Fahrenheit or 23.9 degrees centigrade and at least fifteen percent humidity at winter design conditions with a minimum of at least two total air changes an hour. All air supply and air exhaust systems must be mechanically operated. All fans serving exhaust systems must be located at the discharge end of the system. Outdoor ventilation air intakes, other than for individual room units, must be located as far away as practicable but not less than twenty-five feet or 7.62 meters from plumbing vent stacks and the exhausts from any ventilating system or combustion equipment. The bottom of outdoor intakes serving central air systems must be located as high as possible but not less than six feet or 1.83 meters above the ground level or, if installed through the roof, three feet or 0.91 meters above roof level. The mechanical ventilation systems must be designed and balanced to provide make-up air and safe pressure relationships between adjacent areas to preclude the spread of infections and assure the health of the occupants. Room supply air inlets, recirculation, and exhaust air outlets must be located with the grill or diffuser opening not less than three inches or 0.08 meters above the floor. Corridors may not be used to supply air to or exhaust air from any room, except that exhaust air from corridors may be used to ventilate bathrooms, toilet rooms, or janitor's closets opening directly on corridors. Continuous mechanical exhaust ventilation must be provided in all soiled areas, wet areas, and storage rooms. In unoccupied service areas, ventilation may be reduced or discontinued when the health and comfort of the occupants are not compromised.

   Laboratories must be ventilated at a rate of six total air changes an hour. All ventilation air from the laboratory must be directly exhausted to the outside. If this ventilation rate does not provide the air required to ventilate fume hoods and safety cabinets, additional air must be provided. A filter with ninety percent efficiency must be installed in the air supply system at its entrance to the media transfer room. Hoods in which highly radioactive materials are processed must have a face velocity of one hundred fifty feet per minute or 0.76 meters per second, have a high-efficiency 99.97% filter, and each hood must have an independent exhaust system with the fan installed at the discharge point of the system. Hoods used for processing infectious materials must have a face velocity of seventy-five feet per minute or 0.38 meters per second.

   Cooking appliances, other than microwave ovens, must be provided with exhaust ventilation to the exterior of the building that is able to remove cooking odors, heat, and moisture.

   Each vehicle parking garage must be provided with carbon monoxide detection to activate exhaust ventilation of six air changes each hour or to open the garage door if the area of the garage is under one thousand square feet. A sign must be posted at the front of each parking space advising the driver to shut off the engine.

   Crawl spaces must be provided with mechanical ventilation at least one-half air changes each day or be provided with open perimeter venting as required by the International Building Code, 2012 edition, section 1203.

Source: 42 SDR 51, effective October 13, 2015 ; 50 SDR 62, effective November 27, 2023 .

General Authority: SDCL 34-12-13 (1)(3)(4).

Law Implemented: SDCL 34-12-13 .

Prior versions effective: 2015-10-13.