U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

Application of a High-Efficiency Cabin Air Filter for Simultaneous Mitigation of Ultrafine Particle and Carbon Dioxide Exposures Inside Passenger Vehicles



Details

  • Personal Author:
  • Description:
    Modern passenger vehicles are commonly equipped with cabin air filters but their filtration efficiency for ultrafine particle (UFP) is rather low. Although setting the vehicle ventilation system to recirculation (RC) mode can reduce in-cabin UFPs by approximately 90%, passenger-exhaled carbon dioxide (CO2) can quickly accumulate inside the cabin. Using outdoor air (OA) mode instead can provide sufficient air exchange to prevent CO2 buildup, but in-cabin UFP concentrations would increase. To overcome this dilemma, we developed a simultaneous mitigation method for UFP and CO2 using high-efficiency cabin air (HECA) filtration in OA mode. Concentrations of UFP and other air pollutants were simultaneously monitored in and out of 12 different vehicles under 3 driving conditions: stationary, on local roadways, and on freeways. Under each experimental condition, data were collected with no filter, in-use original equipment manufacturer (OEM) filter, and two types of HECA filters. The HECA filters offered an average in-cabin UFP reduction of 93%, much higher than the OEM filters (approximately 50% on average). Throughout the measurements, the in-cabin CO2 concentration remained in the range of 620-930 ppm, significantly lower than the typical level of 2500-4000 ppm observed in the RC mode. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • ISSN:
    0013-936X
  • Document Type:
    Text
  • Funding:
    Grant
  • Genre:
    Journal Article
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • Volume:
    48
  • Issue:
    4
  • NIOSHTIC Number:
    nn:20055781
  • Citation:
    Environ Sci Technol 2014 Feb; 48(4):2328-2335
  • Contact Point Address:
    Yifang Zhu, Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California, Los Angeles, Los Angeles, California 90095,-1772 United States
  • Email:
    Yifang@ucla.edu
  • CAS Registry Number:
    Carbon dioxide (CAS RN 124-38-9)
  • Federal Fiscal Year:
    2014
  • Performing Organization:
    University of California Los Angeles
  • Peer Reviewed:
    True
  • Start Date:
    20050701
  • Source Full Name:
    Environmental Science and Technology
  • End Date:
    20270630
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:a35fb2dde44b27f1d02c11ebebd0371a16dc3de4e945152e526ed942c40724565f38b57dbfbbdc3b44065cb0a33d8bbfb4fa177404f98027a9a2bf914499e4f3
  • Download URL:
  • File Type:
    Filetype[PDF - 2.39 MB ]
PREVIOUS
ON THIS PAGE
Details
CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners.

As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.
BACK TO TOP