CHC MEP Systems in Healthcare Facilities

Question 1

According to ASHRAE 170, what is the minimum number of total air changes per hour (ACH) required for an operating room?

Accepted Answer

20 ACH

Answer

ASHRAE 170 requires a minimum of 20 total air changes per hour for operating rooms to maintain sterile conditions and dilute airborne contaminants.

Question 2

What type of pressure relationship must an Airborne Infection Isolation (AII) room maintain relative to the adjacent corridor?

Accepted Answer

Negative pressure

Answer

AII rooms must maintain negative pressure relative to adjacent areas to prevent airborne pathogens from escaping into the corridor and infecting others.

Question 3

Which ASHRAE standard specifically governs ventilation requirements for healthcare facilities?

Accepted Answer

ASHRAE 170

Answer

ASHRAE 170 'Ventilation of Health Care Facilities' is the primary standard governing ventilation system design in healthcare settings and is referenced by the FGI Guidelines.

Question 4

What is the minimum negative pressure differential required between an Airborne Infection Isolation room and the adjacent corridor per CDC and ASHRAE 170 guidelines?

Accepted Answer

0.01 inch water gauge

Answer

A minimum differential of 0.01 inch water gauge (approximately 2.5 Pa) is required to maintain consistent negative pressure in AII rooms without making doors difficult to open.

Question 5

What air supply system configuration is required for operating rooms to prevent cross-contamination between spaces?

Accepted Answer

100% outside air single-pass system

Answer

Operating rooms require 100% outside air single-pass systems with no recirculation from or to other spaces to prevent pathogen spread between areas.

(CHC) Certified Health Care Constructor Practice Test

(CHC) Certified Health Care Constructor Practice Test

CHC MEP Systems in Healthcare Facilities