Deiiang Fume Hoods - ANSI ASHRAE 110 Test Method Guide.docx

ASHRAE 110 measures three things and sets no pass mark. Face velocity screens; visualisation explains; tracer gas quantifies. The limits everyone quotes, 0.05 and 0.10 ppm, come from Z9.5, not from ASHRAE 110. This guide sets out the arithmetIC, then shows which Deiiang design provision produces which result, what has been measured on the T3 platform, and how to commission a hood so the number still holds in year eight.