EXT- Class 1 Biohood



Our EXT CLASS 1 Biohood provides the highest level of operator and environmental protection from harmful particulates available today. Quality materials, components and workmanship normally associated with high-end models can be found in all of our cost-effective EXT series hoods.


  • Operator Protection
    The airflow is directed away from the operator, into the hood to be filtered. Each EXT size has been successfully ASHRAE 110 tested with excellent results.
  • Particulate Filtration
    The CLASS 1 model filters the contaminated air through a HEPA filter, rated 99.99% efficient at 0.3 microns.
  • Independent Operation
    Internal fans direct the air without being ducted to the building system and vent the filtered air back into the room.
  • Corrosion Resistant
    Constructed from corrosion-resistant white polypropylene, these hoods are ideal for processes involving corrosive chemicals and are resilient to frequent sanitizing.


  • High Efficiency Particulate Air (HEPA) filter, rated 99.99% efficient at 0.3 microns
  • Vertically sliding face shield, fully counter-balanced
  • Quick-change, disposable pre-filters, rated MERV 7
  • Side windows
  • Fluorescent task lighting
  • Cord pass-through grommet
  • Separate On/Off fan and light switches
  • 15’ power cord, 115V


  • Base frame, standing or sitting height
  • Casters for base frame
  • GFI duplex electrical outlets
  • Low flow alarm package
  • Stainless steel lining on work surface
  • Service valves
  • Exhaust transition connections
  • Carbon filtration


Standard sizes nominally 3’, 4', and 6’.  Custom widths by special order.

Download a PDF order form here:  CUTSHEET

A leader in Building Clean Environments

We are very pleased to announce that as a result of a recent merger of Microzone Corporation and Design Filtration Inc., our two companies have become one entity under the name of Design Filtration Microzone Inc.

This is a very exciting venture for both companies, for our employees, customers, distributors and our supplier partners. Our mission at Design Filtration Microzone Inc. is to provide an excellent customer service experience with the unsurpassed knowledge base and the high level of expertise that our customers and distributors have come to expect. This joining of forces has resulted in a more comprehensive product offering including several new equipment lines to be announced in the coming months.


86 Harry Douglas Drive.Ottawa, Ontario
K2S 2C7 Canada

Telephone: 613-831-8318

Toll Free: 888-636-8609

Fax: 613-831-8321