{"id":2191,"date":"2022-08-26T10:52:29","date_gmt":"2022-08-26T05:22:29","guid":{"rendered":"https:\/\/www.kewaunee.in\/blog\/?p=2191"},"modified":"2024-12-03T00:00:45","modified_gmt":"2024-12-02T18:30:45","slug":"ductless-vs-ducted-fume-hoods","status":"publish","type":"post","link":"https:\/\/www.kewaunee.in\/blog\/ductless-vs-ducted-fume-hoods\/","title":{"rendered":"Ductless vs Ducted Fume Hoods"},"content":{"rendered":"

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Ductless Vs Ducted Fume Hoods<\/span><\/h1>[vc_column_text]Fume hoods<\/a> are a critical part of any laboratory that deals with hazardous or toxic chemicals and it\u2019s an essential requirement to have. They\u2019re local ventilation devices that help protect the user from any hazardous material in the laboratory. Fume hoods protect lab users by containing vapours, dusts, and gases generated within the hood. Fume hoods remove the fumes as air flows into the hood and then out via the laboratory exhaust system.<\/span><\/p>\n

One of the questions we often encounter is, whether the choose a traditional <\/span>ducted fume hood<\/span> or go for the <\/span>ductless hoods<\/span><\/a>. It\u2019s a good question to explore during the lab design and planning stage, as both the options have their advantages and drawbacks.<\/span><\/p>\n

Let\u2019s explore the key features, uses, and pros\u2019 and cons\u2019 of both the options in this blog.<\/span>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n\n\n\n\n\n\n\n\n\n
<\/th>\nDUCTED FUME HOOD<\/strong><\/th>\nDUCTLESS FUME HOOD<\/strong><\/th>\n<\/tr>\n<\/thead>\n
What are they?<\/span><\/td>\nDucted laboratory fume hoods are ventilated enclosures that are connected to the HVAC system. The ducted hoods draw the contaminated air out through the HVAC system filter and <\/span>pushes the air outside the building<\/b>. In a ducted system the contaminated air is not recirculated back into the laboratory.\u00a0<\/span><\/td>\nDuctless laboratory fume hoods are ventilated enclosures that have their own fan, which draws air out and through filters and ultimately <\/span>recirculates it into the laboratory<\/b>. The filters are designed to trap vapours generated in the chemical hood and exhaust clean air back into the laboratory.<\/span><\/td>\n<\/tr>\n
Where are they used?<\/span><\/td>\nDuctless laboratory fume hoods are the most used and the only choice for many laboratories, where the present or future <\/span>hazard levels are high<\/b>, and the nature of experiments may change.<\/span><\/td>\nDuctless laboratory fume hoods should be used <\/span>only where the hazard is very low<\/b>, and where the access to the hood and the chemicals used in it are carefully controlled.<\/span><\/td>\n<\/tr>\n
What are the different types?<\/span><\/td>\nThe common <\/span>applications & variants<\/span> are:<\/span><\/p>\n
    \n
  • Benchtop Fume Hood<\/span><\/li>\n
  • Distillation Fume Hood<\/span><\/li>\n
  • Floor Mounted Fume Hood<\/span><\/li>\n
  • Radioisotope Fume Hood<\/span><\/li>\n
  • Perchloric Fume Hood<\/span><\/li>\n<\/ul>\n<\/td>\n
The common <\/span>applications & variants<\/span> are:<\/span><\/p>\n
    \n
  • DH-I<\/span><\/li>\n
  • DH-II<\/span><\/li>\n
  • DH-III<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Advantages<\/span><\/td>\n\n
    \n
  • Suitable for a wide range of chemicals & experiments<\/span><\/li>\n
  • Safer as contaminants are exhausted outside the laboratory<\/span><\/li>\n
  • Easy maintenance<\/span><\/li>\n
  • Can be used constantly<\/span><\/li>\n<\/ul>\n<\/td>\n
\n
    \n
  • Simpler installation & easy to move it around<\/span><\/li>\n
  • Uses less energy compared to ducted variants<\/span><\/li>\n
  • Cheaper compared to ducted variants<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
Disadvantages<\/span><\/td>\n\n
    \n
  • Fixed & difficult to move or relocate<\/span><\/li>\n
  • Costs more than the ductless variants<\/span><\/li>\n
  • Consumes more energy than ductless variants<\/span><\/li>\n<\/ul>\n<\/td>\n
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