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Your guide to Room Pressure and Ventilation Studies

Ventilation systemsSpecialized spaces must be maintained at a positive or negative pressure to ensure safety and compliance to standards. Ventilation systems that maintain and control room pressurization within hospital isolation rooms are typically classified as either Airborne Infection Isolation – AII Rooms (Negative to hallway) or Protective Environment – PE room (Positive to hallway). These rooms are designed to comply with various standards such as ASHRAE 170-2008, FGI/AIA 2010, and CDC. To comply with the standards, these rooms typically are set up to maintain a small pressure differential relative to a hallway or anteroom. This pressure is stipulated in the standards as a minimum of 0.01 in. H2O (2.5 Pa).

MTS Company Information:

  • ASSE 6010 Licensed
  • NITC Certified as Medical Gas Verifier
  • NFPA 99 Compliant
  • Bonded & Insured
  • SAM/DUNS registered
  • NAICS 238220/238290/237120
  • MGPHO Registered

How to Request a Quote:

  1. Call us at (844) 768-5744
  2. Email us: [email protected]
  3. Use the Request For Quote button to your right
  4. Fill out the callback form and we’ll call you back
Ventilation Analysis

This assessment is conducted to determine proper ventilation in accordance with applicable standards. The study includes an evaluation of the ventilation system to determine correct pressure relationships to adjacent areas and proper air changes per hour in the employee workplace. All ventilation studies are performed on equipment that is calibrated using the standards of accuracy from National Institute of Standards and Technology. All tests meet ASHRAE, NIOSH, OSHA and other applicable Standards.


Airborne Infection Isolation Room   Airborne Infection Isolation Room: A room designed for persons having or suspected of having an infection that is spread through coughing or other ways of suspending droplets of pathogens into the air (e.g. tuberculosis, small pox).

Protective Environment Room   Protective Environment Room: A patient room that is intended to protect a high risk immunocompromised patient from human and environmental airborne pathogens.

 Air Changes Per Hour   Air Changes Per Hour: Measure of the air volume added to or removed from a space (normally a room or house) divided by the volume of the space.

Ventilation Checklist:

  • Are your AII and PE rooms pressurized correctly?
  • Are your supply vents functioning correctly?
  • Are your exhaust grilles functioning correctly?
  • Are your Air Changes Per Hour readings within acceptable ranges for the size of room?

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