How to Measure Total External Static Pressure (TESP)

In this brief video Bryan explains How to Measure Total External Static Pressure (TESP) with a manometer as well as some of the things to look for when diagnosing high static pressure.

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[timothyhall]

this was probably the best video explaining it so far

Great video this has been very helpful

[Nuttypro-f]

Insane how much to hvac there actually is

[felixchien]

3:15 the words aren't clear to me here. And the picture also appears to be opposite of what you're saying.

You say the probe needs to be "pointed opposite of the airflow". Which would mean away from the airstream. But then you say "pointed INTO the airstream" which sounds like you want the probe pointed against the airstream as shown in the picture...

[East_Owl]

Let’s get some package unit TESP videos

[punchpunchowned]

Does the furnace motor matter? Will ECM motor increase static and PSC decrease from lack of airflow?

[AbdulKhaliq]

Please write in the display clearly reading

[fazesenso]

How do you tell it’s not a blockage in the furnace like a plugged heat exchanger or coil ?

[raymondgoodwin]

Could you please explain to me why the blower is on the supply side of a residential air handler. I've been looking for the answer to this for weeks. I keep getting conflicting answers. Thanks

[staticpressurenerd]

Thanks Bryan. Question: Why do you not take the reading at the inlet of blower after the coil on the air handler system? Wouldn’t the coil count as a pressure drop in the return side?

[cdubs]

In a perfect world, the return and supply will be the same?

[dannyg]

Why don’t you put the probe next to the blower on the fan coil??? Instead of before the coil? It would add more resistance, or is it because you’re measuring “External” static pressure and not “total” static pressure?

[mhoush]

This is awesome, however I would disagree w/ the AH / Fan-Coil section... Most units include / come w/ a factory filter, however the docs are typically horrible or never mention what the drop is for said filter (and they're typically way to small for anything but a rock catcher)... This is why I prefer static mapping on new equipment (although I know that's beyond the scope of what this video is going for).

[wilfredovega]

What about a unit with electric heat strip. Where do you place probe before or after Strip..

[Mikecianfrocco]

What about a Trane hyperion a/h with coil on top

[waynemiles]

I do not understand the placement of the probe on the fan coil unit. If the probe is placed before the coil and the coil is blocked with dirt and crud you will get a low reading but if you place the probe after the coil you will get a high negative reading because that fan is really sucking trying to move that air and when this is added to the supply probe static you will get a very high TESP which means you will be moving less CFM’s. Somebody please help explain the placement of the probe on the return. If I want to check static on an old unit I will not get a correct TESP if my return probe is before the dirty coil. Thanks.

[johnboughton]

You say to point the probe into the air stream then you say you are trying notto get air directly into the probe . How is it that you can avoid velocity pressure when you point the probe directly into the air stream. You said point it opposite of the air flow (not with the air flow) I think you are measure ing velocity pressure id you do that.

[caseygrant-ztzb]

Total external static.... No presidence