Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Pulmonary Function Tests01:25

Pulmonary Function Tests

Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
Turnover Number and Catalytic Efficiency01:19

Turnover Number and Catalytic Efficiency

The turnover number of an enzyme is the maximum number of substrate molecules it can transform per unit time. Turnover numbers for most enzymes range from 1 to 1000 molecules per second. Catalase has the known highest turnover number, capable of converting up to 2.8×106 molecules of hydrogen peroxide into water and oxygen per second. Lysozyme has the lowest known turnover number of half a molecule per second.
Chymotrypsin is a pancreatic enzyme that breaks down proteins during digestion. The...
Single Pipe Systems01:24

Single Pipe Systems

In pipe flow analysis, problems are typically categorized into three types — Type I, Type II, and Type III — based on the known parameters and the desired outcome. Each type of problem addresses specific engineering requirements using fluid properties, pipe characteristics, and operational conditions.
In a Type I problem, fluid properties (density and viscosity), pipe characteristics (including diameter, length, and surface roughness), and the flow rate or average velocity are known. The...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Response of consumer and research grade indoor air quality monitors to residential sources of fine particles.

Indoor air·2018
Same author

Quantifying fine particle emission events from time-resolved measurements: Method description and application to 18 California low-income apartments.

Indoor air·2017
Same author

Measured performance of filtration and ventilation systems for fine and ultrafine particles and ozone in an unoccupied modern California house.

Indoor air·2016
Same author

An Exploratory Analysis of the Relationship Between Mortality and the Chemical Composition of Airborne Particulate Matter.

Inhalation toxicology·2015
Same author

Results of the California Healthy Homes Indoor Air Quality Study of 2011-2013: impact of natural gas appliances on air pollutant concentrations.

Indoor air·2015
Same author

Formaldehyde and acetaldehyde exposure mitigation in US residences: in-home measurements of ventilation control and source control.

Indoor air·2014

Related Experiment Video

Updated: May 28, 2026

Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India
09:33

Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India

Published on: December 23, 2022

Performance of installed cooking exhaust devices.

B C Singer1, W W Delp, P N Price

  • 1Indoor Environment Department, Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. bcsinger@lbl.gov

Indoor Air
|November 3, 2011
PubMed
Summary

Home cooking exhaust fans often perform below advertised airflow, removing less than half of cooking pollutants. Achieving high capture efficiency requires high, noisy settings, indicating a need for better hood design for healthier kitchens.

More Related Videos

Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System
08:59

Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System

Published on: May 22, 2020

Fabrication and Testing of Catalytic Aerogels Prepared Via Rapid Supercritical Extraction
09:28

Fabrication and Testing of Catalytic Aerogels Prepared Via Rapid Supercritical Extraction

Published on: August 31, 2018

Related Experiment Videos

Last Updated: May 28, 2026

Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India
09:33

Visualizing Field Data Collection Procedures of Exposure and Biomarker Assessments for the Household Air Pollution Intervention Network Trial in India

Published on: December 23, 2022

Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System
08:59

Measuring Sub-23 Nanometer Real Driving Particle Number Emissions Using the Portable DownToTen Sampling System

Published on: May 22, 2020

Fabrication and Testing of Catalytic Aerogels Prepared Via Rapid Supercritical Extraction
09:28

Fabrication and Testing of Catalytic Aerogels Prepared Via Rapid Supercritical Extraction

Published on: August 31, 2018

Area of Science:

  • Indoor air quality research
  • Mechanical engineering
  • Environmental health science

Background:

  • Natural gas cooking releases pollutants that can reach hazardous levels in homes.
  • Cooking exhaust fans are assumed to offer adequate protection, but their real-world performance is often unverified.

Purpose of the Study:

  • To measure the performance of residential cooking exhaust devices.
  • To quantify the impact of device and installation parameters on capture efficiency (CE).
  • To assess airflow, sound levels, and CE of installed cooking exhaust systems.

Main Methods:

  • Measured airflow, sound, and CE for 15 installed cooking exhaust devices.
  • Analyzed data to determine the influence of parameters like flow rate and device coverage.
  • Compared performance across different device types and burner usage.

Main Results:

  • 10 out of 15 devices had measured maximum airflows at or below 70% of advertised values.
  • Devices without capture hoods (e.g., microwave combinations) showed significantly lower CE.
  • High CE (>75%) often required high fan settings, leading to sound levels exceeding 56 dB.
  • Capture efficiency was generally higher for rear burners compared to front burners.

Conclusions:

  • Installed cooking exhaust devices frequently underperform, failing to capture a significant portion of cooking pollutants.
  • Achieving effective pollutant capture often necessitates unacceptably high noise levels.
  • Improvements in range hood design are crucial for enhancing pollutant capture efficiency at acceptable noise levels.