HCC HCC MEP Systems in Healthcare Facilities 1 — Questions and Answers
Question 1: What minimum number of total air changes per hour (ACH) is required for general operating rooms per FGI Guidelines?
- 6 ACH
- 15 ACH
- 20 ACH (Correct answer)
- 25 ACH
Correct answer: 20 ACH
FGI Guidelines require a minimum of 20 total air changes per hour for operating rooms, with at least 4 of those changes being outside air, to dilute airborne contaminants.
Question 2: What air pressure relationship is required in an operating room relative to adjacent spaces?
- Negative pressure to contain surgical contaminants
- Neutral pressure equal to adjacent corridors
- Positive pressure to prevent corridor air from entering (Correct answer)
- Variable pressure depending on procedure type
Correct answer: Positive pressure to prevent corridor air from entering
Operating rooms require positive air pressure relative to adjacent spaces so that clean filtered air flows outward, preventing contaminated corridor air from entering the sterile environment.
Question 3: Which spaces in a healthcare facility require negative air pressure relationships?
- Pharmacies and clean medication rooms
- Airborne infection isolation rooms and soiled utility areas (Correct answer)
- Operating rooms and procedure rooms
- Neonatal intensive care units
Correct answer: Airborne infection isolation rooms and soiled utility areas
Airborne infection isolation (AII) rooms require negative pressure to contain infectious airborne particles within the room and prevent their spread to adjacent patient care areas.
Question 4: What does HEPA stand for in the context of healthcare HVAC filtration systems?
- High Energy Particulate Absorption
- High Efficiency Particulate Air (Correct answer)
- Hospital Equipment Pressure Adjustment
- Heated Exchange Particulate Array
Correct answer: High Efficiency Particulate Air
HEPA (High Efficiency Particulate Air) filters remove at least 99.97% of particles 0.3 microns or larger, providing critical protection against airborne pathogens in sensitive healthcare spaces.
Question 5: Why is humidity control critical in healthcare facility HVAC design?
- Primarily to reduce energy consumption and utility costs
- To prevent microbial growth, static electricity, and equipment damage that affect patient safety (Correct answer)
- To improve staff comfort and reduce absenteeism only
- To meet architectural finish warranty requirements
Correct answer: To prevent microbial growth, static electricity, and equipment damage that affect patient safety
Humidity control in healthcare facilities prevents microbial growth from excess moisture, eliminates static electricity risks, protects sensitive equipment, and maintains patient safety and comfort.
Question 6: What is an Air Handling Unit (AHU) in a healthcare facility mechanical system?
- An automatic humidity sensing and adjustment device
- The central component that conditions and distributes air controlling temperature, humidity, and filtration (Correct answer)
- An auxiliary heating unit for supplemental zone heating
- An airborne hazard detection and alarm unit
Correct answer: The central component that conditions and distributes air controlling temperature, humidity, and filtration
An Air Handling Unit (AHU) is the central mechanical component that conditions air by controlling temperature, humidity, and filtration before distributing it throughout designated zones of a healthcare facility.
HCC HCC MEP Systems in Healthcare Facilities 1
What minimum number of total air changes per hour (ACH) is required for general operating rooms per FGI Guidelines?