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Be Good in the Hood

Chemical fume hoods are found in chemistry and biology labs. A single chemical fume hood can use as much energy as 3.5 households every day due to the large volume of air that must be moved through the hood by the ventilation system.  Broadly speaking, ventilation systems and fume hoods can be classified into two categories:  Constant Air Volume (CAV) and Variable Air Volume (VAV). As these names suggest, in a CAV fume hood the amount of air flowing through the hood is constant, whereas in a VAV fume hood the amount of air flowing through the hood can be adjusted. Because energy consumption in fume hoods is related to the volume of air flowing through them, reducing the air flow volume in a VAV fume hood results in energy savings.

Air flow volume in a fume hood is manipulated by adjusting the height of a movable sash, which acts as a barrier between the inside of the hood and the rest of the lab. The sash should be raised when working in the hood, and in most cases the sash should be lowered when work in the hood is complete to ensure the safety of laboratory personnel.  In a VAV fume hood, lowering the sash also reduces the speed of the exhaust fan and the volume of air being exhausted by the VAV ventilation system. The energy savings from lowering the sash in a VAV fume hood can be upwards of 40%.

To raise awareness about safety and sustainability for fume hoods, My Green Lab has a 'Be Good in the Hood' campaign. We've created stickers with the image below as a reminder to close fume hood sashes.


These clear stickers can be ordered from My Green Lab by emailing us.
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4653 Carmel Mountain Rd
Ste 308-1032
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Donate to My Green Lab
  • Home
  • About
    • Our Team
    • News & Publications
    • Newsletter
    • Employment Opportunities
    • Contact Us
    • Data Privacy
  • Programs
    • My Green Lab Certification >
      • My Green Lab Certification Update Process
    • ACT
    • Freezer Challenge
    • My Green Lab Ambassador
    • Green Chemistry
    • CEEL
  • Resources
    • 2022 CARBON IMPACT OF BIOTECH & PHARMA REPORT >
      • 2021 Carbon Impact of Biotech & Pharma Report
    • Autoclave Impact Evaluation
    • Waste
    • Energy
    • Water
    • Green Chemistry
    • Other Topics
    • How to Green Lab
    • Partners
    • Case Studies
  • Sponsorship
    • Corporate Sponsorship
    • Donate
  • 2022 MGL Summit
    • 2022 Europe Summit
    • 2021 Sustainability Summit
    • 2020 Sustainability Summit
  • The Beaker
  • Education
    • Green Lab AP
  • Out of the Box Podcast
  • Million Advocates