# 133 Air flow quantity measurement l CFM Measurement l Air Velocity Measurement l Use of Anemometer

This video will explain to you about the measurement of airflow quantity or CFM.
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[@Tech_Gaurav]

*UA-cam par Sabse best chennal hai ye guruji*
HVAC ke liye

[@Tech_Gaurav]

Video dekh kar bahut achha Laga
Sir ese hi AAP hamari knowledge Ko impove karte rahiye
Thank you so much sir

[@marcojr8001]

To the world you may just be a teacher, but to your students you are a HERO.” .... great going sir.

[@girishshinde]

Thanks Mathew

[@layaqatali9044]

Sir, aap bhut hi acha explane karte hai. Nice

[@girishshinde]

Thanks

[@manjoorali5369]

My best guru ho Aap

[@manjoorali5369]

Kaphi din se intjar tha sir nice sir

[@rahulchouhan4823]

Very nice explain .....koi bhi nhi samjha skta aise sir apke jaise

[@girishshinde]

Thanks

[@rajeshmohan7881]

As usual you are superb.

[@husen6523]

Thank you so much sir your great♥

[@mujeeb7100]

Tremendously great, a good teacher.

[@girishshinde]

Thanks

[@merothau5799]

Thank you brother for sharing your idas
and i like the way you explain the details is so clear.
I have an request to you to make a video about how to calculate dB and NC from air flow/cfm.
i would be so thankful to you if you make this video as per my request .

[@360technicalglance8]

Excellent explanation

[@kennethlobo4420]

Thank u sir for Ur reply.i also wanted to ask u to pls explain about air change .i hear this term very often and also during interviews this is a question frequently asked.Thanking U🙏

[@tejprakashluhar7790]

Sir apka explanation bahut clear hota hai thanks sir Relative humidity measure krne ka b video plz

[@girishshinde]

Thanks

[@thakurdass7150]

That is Awesome.

[@deepakbhawar6984]

Nice presentation

[@sahidseikh21]

Thank you sir 😊

[@zakirullahzakir6569]

Awesome video as usual... Some questions raised in my mind,would you please answer.
1) Is it mentioned on each AHU that how much CFM it produces?
2) The filters u mentioned are bags filters or panel/ pre filters? And do we have to put anemometer after the filters?
3) How we know that the calculated CFM is sufficient for the area/ room? Would you please calculate the required CFM of one room? and then select the cooling equipment for that room.
4) How much fresh air should be added and much air should be exhausted through the AHU, how we calculate it?

[@abidhassan2571]

I think we have to use anemometer infront of the serving area supply grill

[@dubdub6746]

Great ❤️❤️❤️👍🙏🙏

[@KuldeepYadav-zq5vz]

Please explain the complete duct sizing and grill/diffuser sizing in terms of Air conditioning and Air cooling differently.

[@esrarkhan1630]

Thank you sir

[@PramodKumar-gz2jg]

Bahut achha vedio

[@girishshinde]

Thanks

[@pardeepsharma8657]

It's good sir

[@vahorasahil2973]

Amazing video sir as always par kha kitna cfm require hota yaani konse place par per person kitna iss par bi aek video detail me bnaiye sir please

[@mukeshgupta3450]

Very nice

[@rishanali410]

Nice bro

[@jungthebest]

So nice thanks
Bms related software k bare mai batein

[@bhushanraut2137]

Please explain about Recovery test, particle count test , filter integrity test and balacing in a room

[@jagadeeshkumar2635]

Tq sirrrr.....

[@chaudharywasi288]

Please make one video for duct sizing how we can calculate ducting size by following the cfm

[@bareillybalesharmaji6330]

Very nice explanation

[@girishshinde]

Keep watching

[@niteshdubey3444]

best sir

[@abbasmaskati5339]

Thanks dear 😘

[@girishshinde]

Welcome

[@gurleen98182]

Sir I don't think apne kuch chora ha....so great teacher

[@girishshinde]

Thanks

[@jindalrefrigerationvlogs9524]

nice sir ji

[@aatmadhardwivedi3124]

Use air quantity instead CFM. .....THATS INTERESTING

[@asifhussainasifali9382]

Sir ji duct sizing and calculation k bary m bataye

[@brendenjacinto2003]

Sir big fan

[@girishshinde]

Thanks Brenden

[@hemantmishra1839]

Tnq sir

[@girishshinde]

Welcome

[@SandeepVShaji]

👍👍👍

[@priyavratsingh4442]

sir haam leakage checkr krne ke liye duct ka area nikal ke duct ka cfm match kre inlet ke cfm se to ye sahi hoga

[@engineeringtrainingideas2334]

sorry Grish i wanna add one thing here that no one is checking the airflow direct using the Anemometer, mostly we are using P tube and duct travels measurement base on duct size

[@Behuman0627]

Hello sir L/s ko meter cube per second me kaise convert krein.

[@sandeepkumar-kr4ee]

Sir ek hoti inverter ac dusari
Dual inverter ac
In dono me Kya antar h
Sir please answer

[@RISHIRAJ-xc7tu]

Pl advise best software or manuals
Round / circular process duct calculation including, Expansion joint, Stiffner, development, pressure drop, Load calculation on each support

[@raheemraqibsufiyangaming6279]

Hi Sir
Pls explain about how to take the tonnage of split ac for a food court and fresh air.
Pls reply.

[@realimrankhan1992]

hi.. sir can u tell me, if we measure cfm from inside of ahu.. from supply air damper..? is it okay?

[@Sohail_SKS]

Can u post any videos related to HVAC system validations
and
documentation etc

[@MrBboyz08]

Good evening sir..I need know about CFM calculation of ceiling fan.please will you explain it via video or text.
Thanks
Abhishek

[@ramayanshriwas2159]

Dear girish ji plz vidio leod hospital room m ac kitna ton ka lagaye

[@imfunnyvideos3814]

Plz sir ek video lg vrf outdoor me andar jo PCB hoti h unke bare me bnaye
Ki kosi pcb ka kya kaam h plz plz sir🙏🙏🙏🙏🙏🙏🙏🙏

[@omarfarooq2036]

Why did you divide average velocity of ar by 20?..and on what bases you should take factor In the meter ...plz reply sir?

[@moviesadda9521]

Sohrab:
Ques 4:-
Coefficient of pressure values of fittings like
Reducer=0.25
Elbow=0.27
It will varies or fixed according to CFM
Ques 1:-
During calculating static pressure only critical path will be taken or not ?
Ques 3:-
In formula
(F×L)/100
F= friction factor or friction head loss
Ques 2:-
we will calculate all the VCD OR only critical path?

[@k.p.pranav7356]

Sir the air flow quantity which u got 5952 CFM.. Is the CMF before the filter or after the filter??

[@RajKumar-ku2mu]

Dear sir as you use factor as 10 so it's fixed quality for all cases or different
What factor we use in industrial air blower ?

[@girishshinde]

The factor to be used is given on anomometer

[@lokeshbaviskar1298]

Good

[@girishshinde]

thanks

[@er.minhajali410]

Sir agar koi squre diffuser hai ya rectunglar diffuser hai to usme kaise nikale ge Air balance krna

[@raffishaik1933]

Sir I have a doubt how to choose the motor rating inside the AHU..depend on CFM.

[@akash2119]

Sir Precision air conditioning per vedio banaye

[@surajlugade886]

Sir but how we determine the ton of ac in case we are installing new ac in room..

[@guddukryadav7507]

Hello sir plazzz one make video for duct silencer.where fixed for duct

[@vipulhodawdekar]

Sir ye leakage kitna allowed hein. Leakage toh system mein unavoidable table hein but kuch permissible limit toh hoge isme.

[@moinkazi5776]

AHU ke size ke hisaab se uska koi fix CFM hota he kya ? Plz reply sir.....

[@asifhussainasifali9382]

Sir ji chiller pump selection k bary m bataye

[@sekarsankar7606]

Air capturing instrument on diffuser side? What is that? Never seen that before.

[@a2zhvacengineeringnbccdelh907]

Sir ahu ka air change Kya hota Haj jese ki kisi ne bola total 8 air change hai jisme 2 airchange fresh sir k hai our 6 air change return k

[@funny_hd]

63×125 mm ka cylinder k liye konsa compressure sahi h .?

[@AnujSingh-ox7hp]

Sir please tell me which CFM is better for ceiling fan 500 CFM or 300 CFM
Please sir reply me

[@aazanaircon]

Sir Diffuser Collar & Grill Collar me se kitna cfm nikal raha hai wo kaise calculation karna hai.
Please reply sir..

[@ssrefrigerator8169]

Ammonia Scrwo compresser ki capacity nikaalne ke bare mein bataen

[@abidhassan2571]

Sir how can we check belt of the ahu motor

[@zaheerkarnekar134]

Sir ahc me ceiling me return jali q dete hai

[@kamleshkumar-oe6gi]

sir Ciller system me humidity control kaise kare moisture problems hai please iska solution bataye

[@hotspotstudyzone3388]

Sir
Jo factor apne (10 ) multiply kiya hai wo kaise. Decide karenge

[@girishshinde]

Wo settings meter pe hoti hai, jo factor meter pe set hai wo factor hi lena hai

[@hotspotstudyzone3388]

@@girishshindeतो हर बार 10 ही फैक्टर लेना है। क्या।

[@ramniwassahu0201]

Air capture hued direct CFM reading mapta h kya sir

[@mithileshsharma8951]

Why we have need compressor in HVAC System...plss plss plss make one video about this topic.

[@girishshinde]

Ok

[@KashifAli-gc2wy]

For cooling

[@kennethlobo4420]

Is it okay if we calculate the cfm with the coil face area of the AHU.could u give us the approximate quantity of Fresh air to be supplied.Thanks

[@girishshinde]

5 Cfm per person per hour, for details I will make one video on it

[@mdsamsadali8221]

Sir ,,
Heat wheel kaise kam karta hi

[@shivammishra2462]

sir Fastly thanks
AHU CFM measurement concept clear
but how to measurement diffuser CFM
Please sir make a video on this topic
And sir if you have air captcha code instruments pic
Please send me sir this is humble request 🙏🙏🙏🙏🙏🙏

[@vijayjangid7808]

CFM ki full from kya Hoti h Bhai ?

[@ramniwassahu0201]

@@vijayjangid7808 cubic feet per minute

[@shahidsaifi4116]

Hi
Sir I am manufacturing of cooling tower fans .so mujhe cooling tower fan ka cfm check karne ki vidhi bataye please.

[@durgab.k.2051]

How to measure return air quantity such as exhaust from toilet?

[@asifhussainasifali9382]

Hay sir how are you

[@dhananjaykumarprasad1059]

Sir ahu me normal kitana air flow rahana chahiye?

[@Study_Encounter]

1200 CFM k liye kitne inch ka axial fan lgaye sir?

[@Amiranalam]

Chilled water supply is often connected to the bottom of condenser, why do not we connect with upper portion of the condenser?
Please reply sir

[@girishshinde]

I think you want to say Cooling tower inlet always connected to bottom of condenser

[@Amiranalam]

Yes sir, you got it.
Please reply

[@Salman-ahmad-pz1ur]

Sir plzz tell me how to convert TR to HP.

[@keshavpal2569]

Chiler plant ka live video

[@Shahjade_Deshi_Fitness]

Sir Ac me kitna Gas charge karen kaise malum hoga??

[@gurleen98182]

One question how do we knw the media which we are pre / fine filters are 3,4,5,10,,50 micron????? Pls revert.... very imp

[@girishshinde]

To measure the air resistance of a fine filter, you can use an instrument called an air flow meter, also known as a manometer.

[@gurleen98182]

@@girishshinde sir to check the cfm we use Nanometer as said but to check the filter media inside either its 3,5,10,25,50 micron or not.... how to check tht Micron Sir. Wait for your revert sir.???
Thanks for helo

[@narayansharma6425]

grill ka size sqfeet mei kesei nikale ge sidha formula lga kar

[@vikaskaushik3764]

Sir, what is factor 10 ?? Is it a standard value ?

[@girishshinde]

Yes

[@SahilKumar-ch1mu]

What is X10 factor iss chiz ko nhi samja mein sir?

[@gurleen98182]

I have seen other video too to calculate there it's not showing to multiple with factor...
Factor part was not explained

[@sirpagangaprasad4239]

Sir exhaust fan CFM kaise nikaltha ai

[@suvebahmad7660]

Sir oil parser cheak formula boliy

[@Viral_videos_everyday]

Sir AHU ki cooling coil TR kese find kare...?

[@Viral_videos_everyday]

Kitne CFM ke liye kitna TR ki coil required he...plz provide information about that

[@vijaykumar-ux8cg]

How to do DG radiator hot air ducting 24000 CFM.

[@DhavalParmar-xg9zp]

How factors decide

[@vikassingh7738]

Room ka salection kaise kre ...?

[@husen6523]

Sir ahu airflow cfm to milgya bt ahu kitne CFM ka h TR ye kyse ptachlega?? Ye Kyse nilale??

[@husen6523]

Plc rp sir...

[@penguin1505]

Defuser Ka kaise measure karenge