External Static Pressure
External Static Pressure
(OP)
Hello
I need help in the following
1- A rule of thumb in calculating the external static pressure for supply and return air ducts
2- Web sites that have a detailed but easy to apply and user friendly methods in calculating external static pressure
I have tried the methods in ASHRAE and SMACNA and find then very lengthy, had to make too many assumptions, and hard to apply.
Thank you in advance





RE: External Static Pressure
RE: External Static Pressure
the application is commercial building, the velocity is 1000 FPM, 1100 FPM, 1200 FPM.
By approximatly how much is it would be oversized?
RE: External Static Pressure
between 1.5 meter/min and 10 meter /min
or 4.9 fpm -- 32.8 fpm.
Steven van Els
SAvanEls@cq-link.sr
RE: External Static Pressure
Hope the info was useful
RE: External Static Pressure
When viewing BLOWER DATA info, on for example, Trane XV80 gas furnace, External Static Pressure is always a factor on the chart, and is a fairly important one at that I'm sure.
Where and at what point exactly to you insert probe in duct? Also, do you insert low probe in R/A duct at the same time as high probe in S/A duct? Is that .45 your ESP that you are seeing on you magnahelic guage?
This exact manner in wich this measurment is performed has always been a big "?" for me, as it seems everybody has a differing view as to how it is correctly performed.
PLEASE HELP! Thanks, Rockhead
RE: External Static Pressure
I also have a similar question regarding "External Static Pressure".
When viewing BLOWER DATA info, on for example, Trane XV80 gas furnace, External Static Pressure is always a factor on the chart, and is a fairly important one at that I'm sure.
Where and at what point exactly to you insert probe in duct? Also, do you insert low probe in R/A duct at the same time as high probe in S/A duct? Is that .45 your ESP that you are seeing on you magnahelic guage?
This exact manner in wich this measurment is performed has always been a big "?" for me, as it seems everybody has a differing view as to how it is correctly performed.
PLEASE HELP! Thanks, Rockhead