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Air handling unit

Air handling unit

Air handling unit

(OP)
How can we we find static pressure across AIR HANDLING UNIT ?

RE: Air handling unit

Manufacturer can tell you specific overall pressure and also external static pressure (the one that you can use outside the unit after all AHU internals are already accounted for.

If you stell manufacturer you need 2" ESP, they will give you an AHU with 3.5" total Static pressure and 2" ESP. Meaning the internals use 1.5". for design ESP is relevant. total pressure really is only important for fan sizing, energy etc.

some manufacturers give you smaller AHU, that have more overall pressuredrop. then they give you tiny high-speed fans. that one will be much more expensive to operate than larger unit with larger fan. so compare properly.

RE: Air handling unit

If you're talking about measuring an existing AHU, get a differential pressure meter like a Magnehelic and some tubing.

Best to you,

Goober Dave

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RE: Air handling unit

Also called a manometer.

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