Operating rooms in acute care hospitals must maintain relative humidity between 20% and 60%, per ASHRAE Standard 170 and the FGI Guidelines, which underpin CMS Conditions of Participation. That range isn’t universal: ambulatory surgery centers accredited by ACHC...
Hospitals must maintain relative humidity within ranges that vary by space type. Under ANSI/ASHRAE/ASHE Standard 170-2021, operating rooms require 20 to 60% RH, while most patient care areas fall within 30 to 60%. These aren’t comfort thresholds, they’re...
When indoor relative humidity drops below 30% RH, it compromises the physiological defenses that patients depend on during recovery. Mucociliary clearance slows, epithelial barriers weaken, and airborne pathogen transmission increases. This article covers the...
Maintaining relative humidity between 40% and 60% in hospital environments reduces the viability of airborne pathogens, supports respiratory mucosal defenses, and has been associated with lower rates of hospital-acquired infections. This isn’t convention,...
Maintaining relative humidity (RH) between 40% and 60% has been shown to significantly reduce the viability of airborne respiratory viruses, including influenza A and SARS-CoV-2, according to peer-reviewed research. The evidence is grounded in controlled laboratory...
Yes, dry air can cause a sore throat. When indoor relative humidity drops below 30%, the mucous membranes lining your nose and throat lose moisture faster than your body can replace it, leaving tissues feeling scratchy and irritated. Raising indoor humidity to between...
