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TABLE OF CONTENTS
—SEFA 9—
DUCTLESS
Page
Committee Members ………………… 299
Forward …………………………….… 300
Sections
1.0 Scope ……………………………… 301
2.0 Purpose …………………………… 301
3.0 Ductless Hood Defined …………... 301
3.1 Ductless Hood Scope of
Application Defined
4.0 Ductless Hood – Types ………….. 301
4.1 Ductless Hood Filtration Categories
4.1.1 DH I
4.1.2 DH II
4.1.3 DH III
4.2 Manufacturer Approved Applications/
Misuse Prevention - As Manufactured
4.2.1 Manufacturer’s Handbook
4.2.2 Manufacturer Approved
Application Questionnaire Form
SEFA 9-A
4.2.3 Filter Saturation Detection
DH II/III
4.2.4 Face Velocity Monitoring
DH II/III
4.3 SEFA 9 Benchmark Testing –
As Manufactured
4.3.1 Filtration and Containment
4.3.2 Independent Testing and
Validation
4.4 Markings
5.0 Ductless Hoods – As used ………... 306
5.1 Safe Work Practices
5.2 Recommended Usage Precautions
5.2.1 DH I
5.2.2 DH II
5.2.3 DH III
5.3 Manufacturer Approved Applications –
As Used
5.3.1 Manufacturer Approved
Application Response Form
SEFA 9-A
5.4 Dedicated Usage/Change of
Application Procedures/Monitoring
5.5 Dedicated Usage Markings–As used
5.6 Contaminated Filter Handling
Procedures
Page
6.0 Ductless Hoods - As Installed ……. 307
6.1 Test Protocol
6.2 Frequency of Testing
7.0 Reference Organizations …………. 308
7.1 Filtration and Exposure Limitations
7.2 Containment
SEFA Form 9-A ……………………….. 309
298
©2010 SEFA—4th Edition Desk Reference, Version 1.0