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@@raghvendrasingh4263 sure I will

Yes what is the doubt?

Hi, great video! Thank you for this. I noted the time for my reference to easily find the door force calculation

@yeehawongi4920 oh OK

U can find the NC value in 2007 ASHRAE Applications Handbook, Chapter 42, clause 47.2 Acoustical Design of HVAC systems, Table no.42

Same is available in AHRI Standard 885-2008, Table 15

NBC we should consider for india I hope

@ravikumar2871 Please download the excel from the link www.dropbox.com/scl/fi/9rggqlumyzb6qpan0812g/Stair-Pressurization-calculation.xlsx?rlkey=c85ip74i9rh2sy8j9mv056rx6&st=o15etws5&dl=0

Sure

appreciate you for watching the video. multiple options are available in this case. considering maximum values, we can select multiple louvers and connecting with common plenum and related duct. secondly if noise is a concern due to higher flow, acoustic air louver can also be installed, etc

@@mepworld3385 in ASHREA they use "face velocity" it mean when we use air volume divide face velocity we get actual louver size, isn't it ?

@@mepworld3385 defination frm ANSI AMCA 500-L "5.4.1.1 Face area velocity. Airflow through a louver divided by its face area."

Thank u😊

Some countries have air properties in their local codes. For example, dubai air property for design we can get from dubai green building regulations and for qatar QCS. If we could not find the details in local codes then we can refer ASHRAE climatic data condition

Excel table available in the description

@@riyasrasheed8271 thank u for your support

@SakibAhsanTamim-p1t all the feedback for the improvement of channel is appreciated which will make us to post more technical videos so more people can utilize this chance

It wil be flanges connection or valve wil be there in the ETS room entry. Valve wil come with dismantling join for maintenance purposes

@@mepworld3385 actually we don't have ETS room in my project. The chilled water pipe directly connected to Qatar Cool... My consultant commented on adding an expansion joint between external & internal chilled water pipe. So I need to clarify whats type of expansion joint we have to use it's same as fire fighting expansion joint or something else?

​@uniquetamilkkr9087 it is not required based on my experience with qatar cool for last 7 years projects works

Hii thank u for your comment

When I submit the report in qatar civil defense, I have considered only the door, windows leakage with number of doors open. Since the stair walls are fire rated, water leakage proof I have not considered even walls also. But in UAE Calculation, I additionally add walls only.

For FAHU total cooling capacity, sensible cooling capacity, calculations of fresh air for one complete level floor including the pressure balancing I explained in two videos which are available in my UTUBE Page alread

Hi yes sure I will post a detailed video for ETS room. For district Cooling system, Pump is available in the secondary supply side (After heat Exchangers) to create the loop from heat Exchangers to buildings HVAC Units

Thank u

Hii thank u for your comment. U mean Pressure Relief Valve not Pressure Reducing Valve, am I correct

@@mepworld3385 yes pressure relief valve

​@ALiRAZA-mg8bd yes, fine..if we have electric variable speed pump or variable speed driver then we add. Because in the event the variable speed driver fails, the rated speed can result in system over Pressurization.

In this project we did not use variable speed drivers

@@mepworld3385 thanks for the answer does all the electric pumps have auto cutt off ? We only set manual shutdown for engine based pumps right ?

@badaruvp4980 it's just based on your local code. I have used 2 days, 3days and 7days when I work with different countries

@@badaruvp4980 sure

17.9 is the constant value in the formula

@@badaruvp4980 sure I will post

All the requirements of ASHRAE, SMACNA explained in this video. Additionally, my personal design experience value based on my projects in qatar,Saudi also given. If you have any special requirements from your project specification, you can follow that or you can choose from the video details

Need some clear explanation of your question. U mean 3 exit doors in one staircase/floor.

3 doors are there in the lobby or staircase?

Inside staircase each floor level only one exit door will come. I don't know which project u found 3 doors in one floor. Your question probably wrong 3 doors in one floor how it will come in staircase

I hope u are talking about lobby area.

Lobby has other Pressurization that is not related to staircase Pressurization