PDA

View Full Version : Duct air measurement tool


q1100q
08-21-2006, 08:38 PM
Whats a good tool to measure air speed out of the outlet ducts for central AC systems. Looking for something reasonably affordable.

Thanks for any help you may be able to offer.
fl1
08-21-2006, 09:34 PM
Why do you want to measure the air speed(velocity)??
watercop
08-21-2006, 09:51 PM
inadequate airspeed can lead to a stall and then a spin.
toddgotfish
08-21-2006, 11:03 PM
LOL....good one watercop.
i assume he wants to make sure each register in the house is distributing equally. Affordable tool, ...is there such a thing???
dan sw fl
08-21-2006, 11:39 PM
Originally posted by q1100q
Looking for something reasonably affordable.
http://www.dwyer-inst.com/htdocs/filedownload.cfm#catalog

Magnehelic for duct air flow
deejoe
08-22-2006, 11:24 AM
a 'VELOMETER' will do.
james broadrick
08-22-2006, 02:59 PM
I would be more conserned with the static pressure, and CFM if those are right then the velocity will surely follow
deejoe
08-22-2006, 04:15 PM
Originally posted by james broadrick
I would be more conserned with the static pressure, and CFM if those are right then the velocity will surely follow
------------------------------------
but that senseless answer does not help the poster any.
He wants to measure the air speed at the outlets.
That is why I told him to get an VELOMETER.
beenthere
08-22-2006, 04:59 PM
Originally posted by james broadrick
I would be more conserned with the static pressure, and CFM if those are right then the velocity will surely follow

If he knows the AK of his registers he can calculate the velocity then.

But a volumeter would make it easier and faster.
bertrand
08-22-2006, 05:10 PM
deleted.
dash
08-22-2006, 05:12 PM
Originally posted by deejoe

Originally posted by james broadrick
I would be more conserned with the static pressure, and CFM if those are right then the velocity will surely follow
------------------------------------
but that senseless answer does not help the poster any.
He wants to measure the air speed at the outlets.
That is why I told him to get an VELOMETER.

What's the chances of knowing the ak ,and how to use it.Plus the velocity thru the grille is often very uneven from side to side or front to back.
arc8
08-22-2006, 06:28 PM
How about an airflow meter?

I use the Krestel 4100 for airflow temp, humidity, velocity. real nice and affordable, i think.

I do have a manometer as well for those static press.