title: Comparison of Indoor Air Quality between 2 Ventilation Strategies in a Facility Housing Rhesus Macaques (Macaca mulatta).
abstract: Adequate indoor-air quality (IAQ)--defined by the temperature, relative humidity, and the levels of carbon dioxide, small particles, and total volatile organic compounds (TVOC)--is crucial in laboratory animal facilities. The ventilation standards for controlling these parameters are not well defined. This study assessed the effect of 2 ventilation strategies on IAQ in 2 rooms housing rhesus macaques (Macaca mulatta). We hypothesized that using a demand-controlled ventilation (DCV) system with a baseline ventilation rate of less than 3 fresh-air changes per hour (ACH) would maintain IAQ comparable to or better than the traditional constant flow rate (CFR) system at 12 fresh ACH. During a 60-d study period, each of the 2 rooms operated 30 d on DCV and 30 d on CFR ventilation. In both rooms, temperatures remained more consistently within the established setpoint during the DCV phase than during the CFR phase. Relative humidity did not differ significantly between rooms or strategies. CO₂ was lower during the CFR phase than DCV phase. Small-particle and TVOC levels were lower during CFR in the larger (3060 ft(3)) room but not the smaller (2340 ft(3)) room. During the DCV phase, the larger room was at the baseline airflow rate over 99% of the time and the smaller room over 96% of the time. The DCV strategy resulted in a baseline airflow rate of less than 3 ACH, which in turn provided acceptable IAQ over 96% of the time; higher ventilation rates were warranted only during sanitation periods.
authors.affiliation: Animal Care Operations, University of Houston, Houston, Texas, USA. nmontsdeoca@uh.edu.
authors.forename: Nicole A
authors.initials: NA
authors.lastname: Monts de Oca
authors.affiliation: Department of Human Health and Performance, University of Houston, Houston, Texas, USA.
authors.forename: Mitzi
authors.initials: M
authors.lastname: Laughlin
authors.affiliation: Plant Operations Facilities Management, University of Houston, Houston, Texas, USA.
authors.forename: John
authors.initials: J
authors.lastname: Jenkins
authors.affiliation: Department of Veterinary Medicine and Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
authors.forename: Cynthia R
authors.initials: CR
authors.lastname: Lockworth
authors.affiliation: Animal Resources Center, University of Texas Medical Branch, Galveston, Texas, USA.
authors.forename: Iris D
authors.initials: ID
authors.lastname: Bolton
authors.affiliation: Animal Care Operations, University of Houston, Houston, Texas, USA.
authors.forename: David W
authors.initials: DW
authors.lastname: Brammer
mesh_terms: D016902:Air Pollution, Indoor; D000818:Animals; D002245:Carbon Dioxide / Q000032:analysis; D006799:Housing, Animal; D008253:Macaca mulatta; D013696:Temperature; D014691:Ventilation
chemical_list: D002245:Carbon Dioxide