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Yes similar to staircase Pressurization, we should apply Q=A x V to find out the door opening also. In staircase,we consider 2 or 3 doors but in lift we should consider 1 no door

@AbdulrahamanAl-Mustafa yes pls send a Hi to nagarajan62392@gmail.com. I will share quickly

Thank you for your support brother. Its very simple. If you see the psychrometric chart for 46 deg c db/30deg c wb humidity ratio and 34/32 deg c humidity ratio, u can see high value in 34/32 not in 46/30 (46/30 is used for qatar unit selection as per QCS section 22). So we select the FAHU with worst condition so it will perform even the temperature reaches high. Here main concern is humidity ratio

@@mohameddeik9556 sure

We will make sure aspect ratio for duct is not exceeding 4:1. duct sizes + insulations and supports clearance so considering all we can decide our minimum requirements. Since we have the options to adjust duct width and height, we can coordinate with architects engineer to provide the size

There is no particular rule to keep the size of the shaft for our system but we need to make sure the accessibility

Video time 9:14 I mentioned minimum pressure value for the roof arrangement

1.5 bar

@@mepworld3385 1.5 bar absolute or 1.5 bar gauge?

​@@MuhammadMunimKhan-b4sabsolute pressure

@fariesmech chartered Engineer india adds professional credibility but may not have as much global recognition as UK or other international charters.

Achieving Chartered Engineer (India) is relatively straightforward due to less stringent assessment requirements. In contrast, Chartered Engineer (UK) involves extensive documentation, structured training, and formal assessment.

the Chartered Engineer (UK) is more challenging to achieve and thus carries more international recognition and prestige compare with CEng India

Once u become chartered engineer UK, you are registered with engineering Council UK so u can do professional engineer easily which has good value compare with chartered engineer india which has no value (outside india) other than india

Thank you @mepworld3385

Yes correct

I'm happy to hear you found it useful, stay tuned for more videos!

@vipintiwari7988 selection of Firefighting can be done based on IBC or NFPA

For example some countries like Saudi follow IBC . In IBC we need to refer chapter 3 and 9

Pls send a hi to my mail id nagarajan62392@gmail.com

Can u send a Hi to nagarajan62392@gmail.com

So I can share the table

Actually it depends on shape of the area also like rectangular or irregular shape buildings because value for both are not same

Normally for light hazard 4 x 4, ordinary hazard 3.4 x 3 I follow instead of going to the maximum allowable distance. It will avoid bigger death zones in-between the sprinklers

This proposal is only for chilled water room expansion tank

Sure I will

Thanks for your feedback, will release the other parts soon.

@sashidhar3025 pls add your mail id here

@@raghvendrasingh4263 sure I will

Exactly

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

Not all formulas will apply in India but parameters are considered as per Indian guidelines

@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