Course 640 OSHA COVID-19 Plan: 1910.502 - Healthcare Requirements

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1910.502 COVID-19 - Healthcare

Photo of CDC and OSHA Logos.
OSHA and CDC are in close cooperation.

OSHA has determined that employee exposure to SARS-CoV-2, the virus that causes COVID-19, presents a grave danger to workers in healthcare settings where people with COVID-19 are reasonably expected to be present and has issued an Emergency Temporary Standard (ETS) to address the hazard. One of the key requirements of the ETS is the COVID-19 Plan. We'll be discussing the various elements of the COVID-19 Plan and ETS thoughout the next two modules.

The rules in OSHA 1910.502, Healthcare, help protect healthcare workers when treating suspected or confirmed coronavirus patients. This includes employees working in:

  • hospitals, nursing homes, and assisted living facilities;
  • emergency responders;
  • home health care workers; and
  • employees in ambulatory care settings.

(a) Scope and Application

This section applies to all settings where any employee provides healthcare services or healthcare support services.

Exceptions: Click the button to see the exceptions to this rule.

  1. the provision of first aid by an employee who is not a licensed healthcare provider;
  2. the dispensing of prescriptions by pharmacists in retail settings;
  3. non-hospital ambulatory care settings where all non-employees are screened prior to entry and people with suspected or confirmed COVID-19 are not permitted to enter those settings;
  4. well-defined hospital ambulatory care settings where all employees are fully vaccinated and all non-employees are screened prior to entry and people with suspected or confirmed COVID-19 are not permitted to enter those settings;
  5. home healthcare settings where all employees are fully vaccinated and all non-employees are screened prior to entry and people with suspected or confirmed COVID-19 are not present;
  6. healthcare support services not performed in a healthcare setting (e.g., off-site laundry, off-site medical billing); or
  7. telehealth services performed outside of a setting where direct patient care occurs.

Note: OSHA does not intend to preclude the employers of employees who are unable to be vaccinated from the exemption. Under various anti-discrimination laws, workers who cannot be vaccinated because of medical conditions, such as allergies to vaccine ingredients, or certain religious beliefs may ask for a reasonable accommodation from their employer. Where an employer reasonably accommodates an employee who is unable to be vaccinated in a manner that does not expose the employee to COVID-19 hazards (e.g., telework, working in isolation), that employer may be within the scope exemption in paragraphs (4) and (5) above.

Where a healthcare setting is embedded within a non-healthcare setting (e.g., medical clinic in a manufacturing facility, walk-in clinic in a retail setting), this section applies only to the embedded healthcare setting and not to the remainder of the physical location.

Where emergency responders or other licensed healthcare providers enter a non-healthcare setting to provide healthcare services, this section applies only to the provision of the healthcare services by that employee.

PPE, physical distancing, and physical barrier requirements do not apply to employees who are fully vaccinated and in well-defined areas where there is no reasonable expectation that any person with suspected or confirmed COVID-19 will be present.

Nothing in this section is intended to limit state or local government mandates or guidance (e.g., executive order, health department order) that go beyond the requirements of and are not inconsistent with this section.

You are encouraged to follow public health guidance from the Centers for Disease Control and Prevention (CDC) even when not required by this section.

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1. What is the primary aim of OSHA's health care emergency temporary standard?

a. Preventing COVID-19 exposure in all healthcare settings
b. Mandating compliance with CDC COVID-19 regulations
c. Protecting healthcare workers facing the highest COVID-19 hazards
d. Forcing healthcare workers to social distance in the workplace

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(b) Definitions

Use your mouse to scroll through the definitions related to this rule.

Aerosol-generating procedure means a medical procedure that generates aerosols that can be infectious and are of respirable size. For the purposes of this section, only the following medical procedures are considered aerosol-generating procedures: open suctioning of airways; sputum induction; cardiopulmonary resuscitation; endotracheal intubation and extubation; non-invasive ventilation (e.g., BiPAP, CPAP); bronchoscopy; manual ventilation; medical/surgical/postmortem procedures using oscillating bone saws; and dental procedures involving: ultrasonic scalers; high-speed dental handpieces; air/water syringes; air polishing; and air abrasion.

Airborne infection isolation room (AIIR) means a dedicated negative pressure patient-care room, with special air handling capability, which is used to isolate persons with a suspected or confirmed airborne-transmissible infectious disease. AIIRs include both permanent rooms and temporary structures (e.g., a booth, tent or other enclosure designed to operate under negative pressure).

Ambulatory care means healthcare services performed on an outpatient basis, without admission to a hospital or other facility. It is provided in settings such as: offices of physicians and other health care professionals; hospital outpatient departments; ambulatory surgical centers; specialty clinics or centers (e.g., dialysis, infusion, medical imaging); and urgent care clinics. Ambulatory care does not include home healthcare settings for the purposes of this section.

Assistant Secretary means the Assistant Secretary of Labor for Occupational Safety and Health, U.S. Department of Labor, or designee.

At-Risk Workers means those workers with disabilities covered by the Americans with Disabilities Act (ADA). They may be legally entitled to reasonable accommodations that protect them from the risk of contracting COVID-19 if, for example, they cannot be protected through vaccination, cannot get vaccinated, or cannot use face coverings. Employers should consider taking steps to protect these at-risk workers as they would unvaccinated workers, regardless of their vaccination status.

Clean/cleaning means the removal of dirt and impurities, including germs, from surfaces using soap and water or other cleaning agents. Cleaning alone reduces germs on surfaces by removing contaminants and may also weaken or damage some of the virus particles, which decreases risk of infection from surfaces.

Close contact means being within 6 feet of any other person for a cumulative total of 15 minutes or more over a 24-hour period during that person’s potential period of transmission. The potential transmission period runs from 2 days before the person felt sick (or, for asymptomatic people, 2 days prior to test specimen collection) until the time the person is isolated.

Common areas means indoor or outdoor locations under the control of the employer that more than one person may use or where people congregate (e.g., building lobbies, reception areas, waiting rooms, restrooms, break rooms, eating areas, conference rooms).

COVID-19 (Coronavirus Disease 2019) means the respiratory disease caused by SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2). For clarity and ease of reference, this section refers to "COVID-19" when describing exposures or potential exposures to SARS-CoV-2.

COVID-19 positive and confirmed COVID-19 refer to a person who has a confirmed positive test for, or who has been diagnosed by a licensed healthcare provider with, COVID-19.

COVID-19 symptoms mean the following: fever or chills; cough; shortness of breath or difficulty breathing; fatigue; muscle or body aches; headache; new loss of taste or smell; sore throat; congestion or runny nose; nausea or vomiting; diarrhea.

COVID-19 test means a test for SARS-CoV-2 that is:

  • (i) Cleared or approved by the U.S. Food and Drug Administration (FDA) or is authorized by an Emergency Use Authorization (EUA) from the FDA to
  • diagnose current infection with the SARS-CoV-2 virus; and
  • (ii) Administered in accordance with the FDA clearance or approval or the FDA EUA as applicable.
  • Direct patient care means hands-on, face-to-face contact with patients for the purpose of diagnosis, treatment, and monitoring.

Disinfect/disinfection means using an EPA-registered, hospital-grade disinfectant on EPA’s “List N” (incorporated by reference, § 1910.509), in accordance with manufacturers’ instructions to kill germs on surfaces.

Elastomeric respirator means a tight-fitting respirator with a facepiece that is made of synthetic or rubber material that permits it to be disinfected, cleaned, and reused according to manufacturer’s instructions. It is equipped with a replaceable cartridge(s), canister(s), or filter(s).

Facemask means a surgical, medical procedure, dental, or isolation mask that is FDA-cleared, authorized by an FDA EUA, or offered or distributed as described in an FDA enforcement policy. Facemasks may also be referred to as "medical procedure masks."

Face shield means a device, typically made of clear plastic, that:

  • (i) is certified to ANSI/ISEA Z87.1 (incorporated by reference, § 1910.509); or
  • (ii) covers the wearer’s eyes, nose, and mouth to protect from splashes, sprays, and spatter of body fluids, wraps around the sides of the wearer’s face (i.e., temple-to-temple), and extends below the wearer’s chin.

Filtering facepiece respirator means a negative pressure particulate respirator with a non-replaceable filter as an integral part of the facepiece or with the entire facepiece composed of the non-replaceable filtering medium.

Fully vaccinated means 2 weeks or more following the final dose of a COVID-19 vaccine.

Hand hygiene means the cleaning and/or disinfecting of one’s hands by using standard handwashing methods with soap and running water or an alcohol-based hand rub that is at least 60% alcohol.

Healthcare services mean services that are provided to individuals by professional healthcare practitioners (e.g., doctors, nurses, emergency medical personnel, oral health professionals) for the purpose of promoting, maintaining, monitoring, or restoring health. Healthcare services are delivered through various means including: hospitalization, long- term care, ambulatory care, home health and hospice care, emergency medical response, and patient transport. For the purposes of this section, healthcare services include autopsies.

Healthcare support services mean services that facilitate the provision of healthcare services. Healthcare support services include patient intake/admission, patient food services, equipment and facility maintenance, housekeeping services, healthcare laundry services, medical waste handling services, and medical equipment cleaning/reprocessing services.

High-touch surfaces and equipment means any surface or piece of equipment that is repeatedly touched by more than one person (e.g., doorknobs, light switches, countertops, handles, desks, tables, phones, keyboards, tools, toilets, faucets, sinks, credit card terminals, touchscreen-enabled devices).

Physical location means a site (including outdoor and indoor areas, a structure, or a group of structures) or an area within a site where work or any work-related activity (e.g., taking breaks, going to the restroom, eating, entering, or exiting work) occurs. A physical location includes the entirety of any space associated with the site (e.g., workstations, hallways, stairwells, breakrooms, bathrooms, elevators) and any other space that an employee might occupy in arriving, working, or leaving.

Powered air-purifying respirator (PAPR) means an air-purifying respirator that uses a blower to force the ambient air through air-purifying elements to the inlet covering.

Respirator means a type of personal protective equipment (PPE) that is certified by NIOSH under 42 CFR part 84 or is authorized under an EUA by the FDA. Respirators protect against airborne hazards by removing specific air contaminants from the ambient (surrounding) air or by supplying breathable air from a safe source. Common types of respirators include filtering facepiece respirators, elastomeric respirators, and PAPRs. Face coverings, facemasks, and face shields are not respirators.

Screen means asking questions to determine whether a person is COVID-19 positive or has symptoms of COVID-19.

Surgical mask means a mask that covers the user’s nose and mouth and provides a physical barrier to fluids and particulate materials. The mask meets certain fluid barrier protection standards and Class I or Class II flammability tests. Surgical masks are generally regulated by FDA as Class II devices under 21 CFR 878.4040 – Surgical apparel.

Vaccine means a biological product authorized or licensed by the FDA to prevent or provide protection against COVID-19, whether the substance is administered through a single dose or a series of doses. The CDC and OSHA claim that vaccines authorized by the U.S. Food and Drug Administration (FDA) are highly effective at protecting most fully vaccinated people against symptomatic and severe COVID-19, and both agencies encourage employers to take steps to make it easier for workers to get vaccinated.

Workplace means a physical location (e.g., fixed, mobile) where the employer’s work or operations are performed.

COVID-19 Plan Elements

(c) COVID-19 Plan

Photo of COVID-19 Safety Coordinator.
COVID-19 Safety Coordinators are responsible for development.

If you have more than 10 employees and are covered by the requirements of 1910.502(a), you must do the following:

  • Develop a Formal Plan: Develop and implement a formal written COVID-19 plan for each workplace. If you have multiple workplaces that are substantially similar, the COVID-19 plan may be developed by workplace type rather than by individual workplace so long as all required site-specific information is included in the plan.
  • Appoint Safety Coordinators: Designate one or more workplace COVID-19 safety coordinators to implement and monitor the COVID-19 plan. Coordinators must :
    • be knowledgeable in associated workplace infection control principles and practices;
    • be formally identified, documented, and assigned coordinator responsibilities;
    • have the authority to ensure compliance with all aspects of the COVID-19 plan.

2. Who is responsible for implementing and monitoring the status of the COVID-19 Plan?

a. Safety coordinators
b. Safety managers
c. Safety committees
d. Department supervisors

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(c) Covid Plan (Continued)

  • Conduct a Hazard Assessment: Conduct a workplace-specific hazard assessment to identify potential workplace hazards related to COVID-19. In order for an employer to be exempt from providing controls in a well-defined area under paragraph (a) of this section based on employees' fully vaccinated status, the COVID-19 plan must include policies and procedures to determine employees' vaccination status.
  • Ensure Employee participation: Seek the input and involvement of non-managerial employees and their representatives, if any, in the hazard assessment and the development and implementation of the COVID-19 plan.
  • Monitor Workplaces: Monitor each workplace to ensure the ongoing effectiveness of the COVID-19 plan and update it as needed.
  • Develop Policies and Procedures: The COVID-19 plan must address the hazards identified by the assessment and include policies and procedures to minimize the risk of transmission of COVID-19 for each employee. Although the COVID-19 plan must account for the potential COVID-19 exposures to each employee, the plan can do so generally and need not address each employee individually.
  • Communicate and Coordinate: Effectively communicate and coordinate with other employers. When employees of different employers share the same physical location, each employer must:

    • effectively communicate its COVID-19 plan to all other employers,
    • coordinate to ensure that each of its employees is protected as required, and
    • adjust its COVID-19 plan to address any particular COVID-19 hazards presented by the other employees.

    This requirement does not apply to delivery people, messengers, and other employees who only enter a workplace briefly to drop off or pick up items.

    If you have one or more employees working in a physical location controlled by another employer:

    • Notify the controlling employer when those employees are exposed to conditions at that location that do not meet the requirements of 1910.502(c); and
    • Protect employees who in the course of their employment enter into private residences or other physical locations controlled by a person not covered by the OSH Act (e.g., homeowners, sole proprietors). This must include procedures for employee withdrawal from that location if those protections are inadequate.

You may include other policies, procedures, or information necessary to comply with any applicable federal, state, or local public health laws, standards, and guidelines in the COVID-19 plan.

3. You must conduct a hazard assessment to identify potential workplace hazards related to COVID-19 that is _____.

a. compatible with all workplaces
b. based on CDC guidelines
c. common within the healthcare industry
d. workplace-specific

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(d) Patient Screening and Management

Photo of example of entry point.
Establish entry points.

In settings where you provide direct patient care, you must:

  • limit and monitor points of entry to the setting. This provision does not apply where emergency responders or other licensed healthcare providers enter a non-healthcare setting to provide healthcare services;
  • screen and triage all clients, patients, residents, delivery people and other visitors, and other non-employees entering the setting; and
  • implement other applicable patient management strategies in accordance with CDC’s "COVID-19 Infection Prevention and Control Recommendations."

You are encouraged to use telehealth services where available and appropriate in order to limit the number of people entering the workplace.

(e) Standard and Transmission-Based Precautions

Develop and implement policies and procedures to adhere to Standard and Transmission-Based Precautions in accordance with CDC’s "Guidelines for Isolation Precautions."

4. In which setting must you limit and monitor points of entry?

a. In all non-healthcare settings
b. Where you provide direct patient care
c. In all commercial establishments
d. An any indoor location with heavy foot traffic

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(f) Personal Protective Equipment (PPE)

Photo of nurse wearing face mask.
Provide face masks as required.

Facemask Requirements

You must:

  • provide, and ensure that employees wear, facemasks that meet the definition in paragraph (b);
  • ensure a facemask is worn by each employee over the nose and mouth when indoors and when occupying a vehicle with other people for work purposes;
  • provide a sufficient number of facemasks to each employee to comply with paragraph (f) and
  • ensure that each employee changes facemasks at least once per day, whenever they are soiled or damaged, and more frequently as necessary (e.g., patient care reasons).

Exceptions: The following are exceptions to the above requirements for facemasks:

  • when an employee is alone in a room;
  • while an employee is eating and drinking at the workplace, if each employee is at least 6 feet away from any other person, or separated from other people by a physical barrier;
  • when employees are wearing respiratory protection according to 1910.134 or paragraph (f);
  • when it is important to see a person’s mouth (e.g., communicating with an individual who is deaf or hard of hearing) and the conditions do not permit a facemask that is constructed of clear plastic (or includes a clear plastic window). Use alternative PPE, such as a face shield, if the conditions permit it; and
  • when employees cannot wear facemasks due to a medical necessity, medical condition, or disability, or a religious belief.

    Exceptions must be provided for a narrow subset of persons with a disability who cannot wear a facemask or cannot safely wear a facemask, because of the disability, as defined in the Americans with Disabilities Act (42 USC 12101 et seq.), including a person who cannot independently remove the facemask. The remaining portion of the subset who cannot wear a facemask may be exempted on a case-by-case basis as required by the Americans with Disabilities Act and other applicable laws. In these situations, ensure that employees wear a face shield for the protection of the employee, if their condition or disability permits it. Accommodations may also need to be made for religious beliefs consistent with Title VII of the Civil Rights Act.

  • when you can demonstrate that the use of a facemask presents a hazard to an employee of serious injury or death (e.g., arc flash, heat stress, interfering with the safe operation of equipment).

    Ensure that each employee wears alternative PPE, such as a face shield, if conditions permit it. Any employee not wearing a facemask must remain at least 6 feet away from all other people unless you can prove it is not feasible. The employee must resume wearing a facemask when not engaged in the activity where the facemask presents a hazard.

    With respect to the above situations, you may determine that the use of face shields, without facemasks, in certain settings is not appropriate due to other infection control concerns.

Cleaning: When you require the use of face shields, ensure that they are cleaned at least daily and are not damaged.

Employee-provided face shields: When an employee provides a proper face shield, you may allow the employee to use it and you are not required to reimburse the employee for that face shield.

CDC does not recommend external using face shields or goggles as a substitute for masks. According to research, face shields only block about 2% of a cough aerosol. Goggles or other eye protection may be used in addition to a mask.

5. What is the CDC's position on the use of face shields to protect against COVID-19 in the workplace?

a. Face shields should not be used as a substitute for masks
b. Face shields must cover mouth, nose, and eyes
c. Face shields must be cleaned hourly
d. Face shields may be used as an addition to masks

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Photo of Filtering Facepiece Respirator (FFR)
Filtering Facepiece Respirator (FFR)

(f) Personal Protective Equipment (PPE) (continued)

Respirators and other PPE when exposure suspected or confirmed COVID-19: You must provide respirators and other PPE during aerosol-generating or other procedures when your employees have exposure to a person with suspected or confirmed COVID-19. You must also ensure that employees use appropriate PPE in accordance with subpart I, Personal Protective Equipment. Appropriate PPE includes:

  • a respirator,
  • gloves,
  • an isolation gown or protective clothing, and
  • eye protection
Photo of Elastomeric Respirator
Elastomeric Half Facepiece Respirator

When there is a limited supply of filtering facepiece respirators, you may follow the CDC’s Strategies for Optimizing the Supply of N95 Respirators. Where possible, you are encouraged to select elastomeric respirators or PAPRs instead of filtering facepiece respirators:

  • to prevent shortages and supply chain disruption; and
  • for aerosol-generating procedures on a person suspected or confirmed with COVID-19.

Additional requirements specific to aerosol-generating procedures on people with suspected or confirmed COVID-19 are contained in paragraph (g). For more information visit CDC's National Personal Protective Technology Laboratory (NPPTL).

6. Which respirator type is recommended by CDC for use in aerosol-generating procedures?

a. Filtering facepiece respirators
b. N-95 respirator
c. Air-purifying respirator
d. Elastomeric respirator

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(f) Personal protective equipment (PPE) (continued)

Use of respirators when not required

  • You may provide a respirator to the employee instead of a facemask. In such circumstances, you must comply with 1910.504.
  • Photo of example of transmission-basedprecautions.
    Transmission-based precautions.
  • Where you provide the employee with a facemask, you must permit the employee to wear their own respirator instead of a facemask. In such circumstances, you must also comply with 1910.504, Mini Respiratory Protection Program.

Respirators and other PPE based on Standard and Transmission-Based Precautions

Precautions. You must provide protective clothing and equipment to each employee based on 2 tiers of recommended precautions in healthcare settings:

7. Where you provide the employee with a facemask, you must permit the employee to _____.

a. wear the employer's mandatory respirator
b. wear their own respirator instead of a facemask
c. refuse to wear a facemask or respirator
d. be vaccinated instead of wearing a facemask

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Photo of workers maintaining social distancing.
Adhere to social distancing guidelines.

(g) Aerosol-generating procedures on a person with suspected or confirmed COVID-19

When an aerosol-generating procedure is performed on a person with suspected or confirmed COVID-19 you must:

  • limit the number of employees present during the procedure to only those essential for patient care and procedure support;
  • ensure that the procedure is performed in an existing Airborne Infection Isolation Room (AIIR), if available;
  • clean and disinfect the surfaces and equipment in the room or area where the procedure was performed.

(h) Physical distancing

You must ensure that each employee is separated from all other people by at least 6 feet when indoors unless you can prove that it is not feasible for a specific activity (e.g., hands-on medical care). This provision does not apply to momentary exposure while people are in movement (e.g., passing in hallways or aisles).

If you prove it is not feasible for an employee to maintain a distance of at least 6 feet from all other people, you must ensure that the employee is as far apart from all other people as feasible.

Physical distancing can include methods such as: telehealth; telework or other remote work arrangements; reducing the number of people, including non-employees, in an area at one time; visual cues such as signs and floor markings to indicate where employees and others should be located or their direction and path of travel; staggered arrival, departure, work, and break times; and adjusted work processes or procedures to allow greater distance between employees.

8. You see two employees passing each other in a hallway. What is the social distancing requirement for the two employees?

a. They must cover their mouth and nose when passing
b. They must maintain the six-foot distancing rule
c. The six-foot rule does not apply
d. They must not shake hands or otherwise touch each other

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Photo of physical barrier.
If you can't social distance, use barriers.

(i) Physical Barriers

At each fixed work location outside of direct patient care areas (e.g., entryway/lobby, check-in desks, triage, hospital pharmacy windows, bill payment) where each employee is not separated from all other people by at least 6 feet of distance, install cleanable or disposable solid barriers, unless you can prove doing so is not feasible. The barrier must be sized (e.g., height and width) and located to block face-to-face pathways between individuals based on where each person would normally stand or sit. The barrier may have a pass-through space at the bottom for objects and merchandise.

Physical barriers are not required in direct patient care areas or resident rooms.

(j) Cleaning and disinfection.

In patient care areas, resident rooms, and for medical devices and equipment, follow standard practices for cleaning and disinfection of surfaces and equipment the CDC’s COVID-19 Infection Prevention and Control Recommendations and Guidelines for Environmental Infection Control (2019), pp. 86–103, 147-149 for guidance.

In all other areas, you must:

Photo of Clean and disinfection steps.
Clean and disinfect often.
  • clean high-touch surfaces and equipment at least once a day, following manufacturer instructions for application of cleaners; and
  • when you are aware that a COVID-19-positive person has been in the workplace within the last 24 hours, clean and disinfect, using the CDC’s Cleaning and Disinfecting Guidance, any areas, materials, and equipment under your control that have likely been contaminated by the person who is COVID-19 positive (e.g., rooms they occupied, items they touched).

You must provide alcohol-based hand rub that is at least 60% alcohol or provide readily accessible hand washing facilities. CDC recommends using ABHR with 60-95% alcohol in healthcare settings. Unless hands are visibly soiled, an alcohol-based hand rub is preferred over soap and water in most clinical situations due to evidence of better compliance compared to soap and water. Hands should be washed with soap and water for at least 20 seconds when visibly soiled, before eating, and after using the restroom.

9. You must provide ready access to hand-washing facilities or alcohol-based hand rub that is _____.

a. at least 60% alcohol
b. a 10% bleach detergent
c. approved by the EPA
d. is effective for at least 24 hours

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Photo ventilation equipment.
Inspect for proper ventilation.

(k) Ventilation

If you own or control buildings or structures with existing heating, ventilation, and air conditioning (HVAC) system(s) you must ensure that:

  • the HVAC system(s) is used according to HVAC manufacturer’s instructions and design specifications;
  • the amount of outside air circulated through its HVAC system(s) and the number of air changes per hour are maximized as appropriate;
  • all air filters are rated Minimum Efficiency Reporting Value (MERV) 13 or higher, if compatible with the HVAC system(s). If MERV-13 or higher filters are not compatible with the HVAC system(s), use filters with the highest compatible filtering efficiency for the HVAC system(s);
  • all air filters are maintained and replaced as necessary to ensure the proper function and performance of the HVAC system(s); and
  • all intake ports that provide outside air to the HVAC system(s) are cleaned, maintained, and cleared of debris.

Where you have airborne infection isolation rooms (AIIR), maintain and operate them in accordance with their design and construction criteria.

Note 1: This section does not require installation of new HVAC systems or AIIRs to replace or augment functioning systems.

Note 2: In addition to the requirements for existing HVAC systems and AIIRs, consider other measures to improve ventilation in according to CDC’s Ventilation Guidance (e.g., opening windows and doors). This could include maximizing ventilation in buildings without HVAC systems or in vehicles.

10. All air filters should have a Minimum Efficiency Reporting Value (MERV) of _____, if compatible with the HVAC system(s).

a. at least 10
b. 13 or higher
c. N95
d. any value up to 13
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Updated 7/19/2021
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