Fume Hoods Energy Eaters

1
Fume Hoods Energy Eaters

• Studies suggest that 75,000 fume hoods in the US
  cost upwards of 3 billion/yr to run Wooliams.
• Fume Hoods use a lot of energy both individually
  and collectively
• MIT has 1147 fume hoods on campus (600 VAV)
• Energy is used for heating, cooling and moving
  the air used in the process of operating fume
  hoods

2
Action Shut the Sash!

• Closed Fume Hood Sash
• 300 CFM
• 1500 (5/CFM)
• Efficient use of fume hoods could save Institute
  thousands of /yr

• Open Fume Hood Sash
• 850 CFM
• 4000 (5/CFM)
• One open hood is equivalent to the cost of
  heating a single family home

Closed Fume Hood
3
Additional Actions

• Keep fume hoods free of obstacles (wires,
  computers, etc) that will prevent you from
  lowering the sash, especially when not in use
• Work with EHS to optimize the face velocity of
  your Constant Air Volume (CAV) hoods