Per ASHRAE standard 62.1
For Private use: 25 cfm per water closet and/or urinal (normal use)
For Private use: 50 cfm per water closet and/or urinal (heavy use)
For Public use: 50 cfm per water closet and/or urinal (normal use)
For Public use: 70 cfm per water closet and/or urinal (heavy use)...
If you are referring for the air handling unit (AHU), then the total pressure drop is the one also called total static pressure (TSP).
TSP = ISP + ESP
where: ISP or internal static pressure - summation of pressure drops caused by mixing box, filters, and coils.
ESP or external static pressure...
Yes - parking that is open to natural ventilation may not need mechanical ventilation provided the opening, say wall, is 50% open.
Please check ASHRAE 62.1-2007 Table 6-4 Minimum Exhaust Rates.
HVAC & Prayers
Commit and you’ll succeed.
davidyu2404, as your fan is exhausting air directly to outside, I assume that the ducting is only connected to fan inlet.
Fan is usually sized or selected based on airflow (units may be cfm or lps) and external static pressure or ESP (unit is in in-wg or pa).
For the static pressure, i will not...
I agree with irfanbaig36, base on some of item 3 requirements by itrammell - Revit MEP is the best software. Here you'll learn 3D drawings wherein the load calculation for HVAC (electrical and plumbing as well) is integrated which is based on ASHRAE standards. Good thing with Revit MEP now...
