Differences between ducted fume hoods and ductless fume hoods

Ductless vs. Ducted Fume Hoods: Which is Right for You?

Choosing the right fume hood for your laboratory is crucial for safety and efficiency. The primary decision often boils down to whether you need a ductless or ducted fume hood. Let’s break down the key differences between the two:

Ductless Fume Hoods

• How they work: Ductless fume hoods recirculate air through filters before returning it to the lab.
• Pros: Easy to install, portable, energy-efficient, and often less expensive due to the lack of ductwork.
• Cons: Limited to low to moderate chemical use, requires regular filter replacement, and potential for filter saturation.

Ducted Fume Hoods

• How they work: Ducted fume hoods exhaust contaminated air outside the building through a duct system.
• Pros: Effective for handling a wide range of chemicals, provides superior containment, and can be customized to specific needs.
• Cons: More complex installation, higher energy consumption, and potential for higher costs due to ductwork and maintenance.

When to Choose Which

• Ductless fume hoods are ideal for:
  • Labs with limited ventilation or space
  • Work with low to moderate chemical hazards
  • Occasional fume containment needs
• Ducted fume hoods are best for:
  • Labs handling a wide range of chemicals
  • Applications requiring maximum containment
  • Facilities with existing ductwork infrastructure

Ultimately, the best choice depends on your specific laboratory requirements, budget, and safety considerations.