== نظام موازنة الغطاء «Sash» ==*Northwestern University Office for Research Safety - The Chemical Fume Hood Handbook*Lab Manager Magazine: CAV, RAV & VAV*University of Louisville's Chemical Hood User's Guide*Information from the University of Bath in the UK*The Fume Hood Resource Center by Lab Manager Magazine*University of Toronto's Guide to running a sash-shutting campaign
==See also==*Laminar flow cabinet*Vented Balance Safety Enclosure*ECO Funnel==References====External links==*Northwestern University Office for Research Safety - The Chemical Fume Hood Handbook*Lab Manager Magazine: CAV, RAV & VAV*University of Louisville's Chemical Hood User's Guide*Information from the University of Bath in the UK*The Fume Hood Resource Center by Lab Manager Magazine*University of Toronto's Guide to running a sash-shutting campaign