HVAC Static Pressure

1)What is mean by static pressure
2)how we can calculate static pressure
2)difference beteween mm of Hg and mm of water guage.
3)How we can relate and calculate Static pressure in manufacturing AHU(air handling Unit)
4)Use of static pressure in HVAC
5)How we can relate and calculate Static Pressure in duct design

R. Kumar,
You need to enroll in a few Mechanical Engineering Classes that teach all of this. If you think that is the purpose of this comments, you are mistaken. :-->

Sushant,
Hmmmmmmmmmm...... I thought you agreed to read all of the comments before you left one. Did you not see what I told Kumar? This is AsktheBuilder.com, not AsktheBuilder University. :->

hai
1. how can i check the static pressure in duct?

2. why need check for static pressure?

3.what is use of static pressure in hvac systems?

thank you.

I am engineer in Installation & commisioning of HVAC system . Pl , mail me the any subject , which is related to HVAC system.i.e HAP [carrier,trane ], heat & cooling load calculation, pump designing of HVAC system.

1). What look like static pressure room for clean room (pharmautical) ?
2). do like stainless steel material from or what ?
3). thanks a lot

how we can calculate static pressure

I WANT HELP IN WHAT I CAN MAKE A FAN SELECTION

How we can relate and calculate Static Pressure in duct design

what is static pressure?

i What to know about air static pressure in air duct system.

1)What is mean by static pressure
2)how we can calculate static pressure

Dear Tim,
If we are calculating the external static pressure (E.S.P) through a supply duct for an AHU, the result was 1"W.G. Do we still need to Cal. the E.S.P for the return duct? Considering that if the AHU blower is capable of supplying air through a resistance of 1"W.G, it will be able to pull back the return air through 1"W.G resistance. As it dose not make since to select the AHU Motor with an E.S.P of 2"W.G (Supply + Return), it will be too high causing vibration & noise issues. Probably the higher value between the supply & return E.S.P need to be selected.
Kindly advice?

Wouldn't it be great if people paid attention to instructions or took the time to read? Well, just a comment about design. I have a brand new house, two story. There is 5T and 3T Carrier unit, 16seer r410. 95%furnaces. After buying the house, i ran the a/c system. These installers decided that their design was so perfect, they didn't need volume dampers. They tried to argue with me and came out to the house, i had the builder come out as well. They told me to shut the register to the room... I politely said "and what, the air will just know to run back to the plenum?" Your design is faulty and undersized, you didnt take into account any heat load, no traps were found on the condensate and it actually had a vacuum on it and overflowed into the ceiling. Needless to say the builder has asked for my services for his projects. People need to pay attention and research their jobs so they don't have to go back and do the job again.

IF I HAVE TWO 90 DEGREE BENDS IN MY DUCT WORK,USING FLEXIBLE DUCT WORK IN MY A.C. SYSTEM,AND I STILL HAVE STATIC PRESSURE,COULD I PUT METAL DUCT WORK AT THE 90 DEGREE TURNS TO REDUCE STATIC PRESSURE.I BELIEVE THAT IS WHERE THE STATIC PRESSURE BUILTS UP.

hi im an hvac engineer
i want t know about the air and water sysytem

1)how much static pressure needed at the end of the duct connected to air conditioned room???
2) how can we calculate the total outlet pressure developed by the centrifugal fan??
Total pressure = static pressure+friction loss+velocity pressure

is it correct???
then how can we calculate static pressure???

Greetings,

Next to accumulated air particles, in your opinon, what is the second most contributing factor increasing static pressure within a Whole-House HVAC system?

THanks in advance!

Dear sir ,

i wn to know about static pressure.
1)What is mean by static pressure
2)how we can calculate static pressure
2)difference beteween mm of Hg and mm of water guage.
3)How we can relate and calculate Static pressure in manufacturing AHU(air handling Unit)
4)Use of static pressure in HVAC
5)How we can relate and calculate Static Pressure in duct design

Come on, guys... This is a starting point, not a course on HVAC. The uestions most of you are asking is like asking a doctor about brain surgery. Sure, he can explain it, but it would take much more time than is available.

You guys can also check wikipedia for definitions and more sources.

Honestly, it looked like Shushant wanted the answers to his HVAC final exam.

Dear Sir,

we are coming up with new project like manufacturing pharma equipment like pass box, rlaf, etc,
i need to calculate some things like
how to do the blower selection ,what will be the cfm in it ,n how to calculate the static pressure for a specific blower
plz reply to me

regards
Darshan

I wish to view commments.