Ventilation calculations
ASP video lesson, 6:14. ASP Domain 1: Mathematical Calculations
Narrated with an AI-generated voice. The script is AI-drafted from the cited rules and fact-checked against them.
Smoke-tube velocity, duct diameter from circumference, dilution ventilation with the mixing factor, hood distance and stack height: the ventilation math tested on the ASP exam.
Included with every ASP pass, with captions, chapters and the full transcript. Every rule and number is cited on screen to its primary source.
What this lesson covers
In this lesson, you'll learn to: calculate velocity from a smoke-tube test, find a duct diameter from its circumference, size dilution ventilation using the mixing factor, and apply the hood distance and stack height rules. A smoke tube lets you measure air velocity with a stopwatch. Velocity equals distance divided by time.
- Intro
- Learning objectives
- Smoke-tube velocity
- Worked example
- Worked example
- Dilution ventilation
- Worked example
- Hood and stack rules
- Hood and stack
- On the job
- Common exam traps
- Recap quiz
The video, captions and full transcript are included with every ASP pass. See passes
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