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@JudgeFredd

4 жыл бұрын

Done ;-)

@ralphcalamba5367

4 жыл бұрын

comment the photo of the Duct Pressure Loss Chart Please :(

@hemanta3758

2 жыл бұрын

@@JudgeFredd so 33

@grantramsay9956

5 ай бұрын

Could you do one about fabric ductwork?

Just enjoyed your video for the first time today on its 4th anniversary. 690,606 views is a testament to how well delivered the material was in your video. As I find myself less and less confident in contractors of late, it is appreciated that you are providing content to empower viewers with knowledge that might have felt out of reach initially. Thanks again and many well wishes for continued success for you and your channel.

Yeah this is pretty cool. Im a sheet metal apprentice, specializing in ductwork for commercial jobs. Interesting to see how the ductwork I make is designed and such. Great video!

So much of this was over my head but I was able to follow the overall concept. Given the fact I’m not even close to being called an engineer, you really lived up to your channel name. Excellent job of explaining complex issues, in an understandable way, without making me feel condescended to, thank you.

@deetailing

11 ай бұрын

Yes I suffered many a nose bleed during this video

great video man as always and congrats for 100k subs.

Great video! Very similar to how I learned in Applied Fluid Mechanics class!

Bro I wish I saw this a few years ago when I started as an hvac engineer. You described something that took me months to get the full picture from the lax training at my company.

Another good thing to mind when sizing ducts is the aspect ratio. Ashrae allows us to size on 1:4 basis while CIBSE mentions to size at 1:3.

@MetrologyEngineer

3 жыл бұрын

*ASHRAE

This was a fantastically simple overview of the engineering process needed to accurately specify a ducting system. Here in the States among contractors, the most common method for duct sizing in residential is the "friction loss per 100 ft." method wherein we calculate the total equivalent length for the longest runs (both supply and return) and size everything based on getting the appropriate amount of air to these runs and balancing the rest with dampers. Really wish there was an instructional video on this process (or even the equal friction method) in Imperial units out in KZread. Thanks for providing such fantastic resources for the industry.

@Ryan-dj5ku

3 жыл бұрын

Look up the "ACGIH Industrial Ventilation" manual. You can download the 23rd edition for free on google. It has step by step examples.

Thank you, for giving great and more easily understandable video

thank you for this video!!! it's very helpful!

Great video. Really well explained!

great video..really helpful.thanks engineeringmindset.

Helpful and to the point explanation , thumbs up!

Great video, it's important to also note that's another driving factor for the mass flow rate is the fresh Air supply which is higher than your cooling or heating loads would override your video size

@Heatherder

3 жыл бұрын

Agreed. This is where hydronics are strong - separating the ventilation needs from the load needs.

Very informatory. I liked this a lot.

Helped me in my project. Great work!!

Just another very good simple method. Thank you

Amazing videos seriously.

I love it, thanks!!

Excellent One. Thank you for your effort.

Great video..... Thank you so much

Intro sounds chiller 😍

Very informative. I want to try doing HVAC at my home by myself. Thanks for the video.

Great video this, can you also do a video on "calculating the cooling and heating loads using psychrometric charts" for HVAC systems? Really appreciate it if you can

@beardedpinoy8645

Жыл бұрын

refer to ashrae brother, so much easy to follow when you have ashre guidelines

So much help in my project rn. Thanks bro.

great video which helps me a lot.

You’re amazing fam.

Amazing video, thank you. I noticed in the video (14.39) you are inputting the data into the interpellation website. that you input in Q11 value 0.14. Should it had been 0.15? (LOL) Its just me and no big deal. It kept me on my toes...so very helpful on your part. Love the videos.....THANK YOU

Great video !Thank you so much , greatting from Việt Nam!

Nice and clear video, well done. Do you have any videos on how to calculate proper condenser and evaporater size/capacity in relation to compressor size/capacity on custom AC units ? If not please consider making one. Thanks

Thank you so much for making this video. Very helpful.

As an engineer, this has help me a lot. Thank you so much for teaching and making useful video like this. Dont stop!

@victory6904

6 ай бұрын

I got my Ac system installation almost a year ago, it smells very bad and when I turn it on it smells like dump wet bathroom. In order to get it to stop smelling I have to get the temperature down to 24, but then it's too cold😢 does anyone know if they have done for me a cowboy job, as I have spent a lot of money

@combatwa4les253

4 ай бұрын

​@@victory6904 24 degree fahrenheit? Or Celsius. Either way you could have someone come potentially clean it, install uv lights or some sort of duct cleaning system. It sounds like it might be mildew caused by not properly insulated duct so it could be sweating and building up water that's smells gross. Could be improper drainage. Hard to diagnose something on the Internet just get a professional to look at it

Off course we enjoy it . Sure it helps us . Thank you, genius .

Thanks! You are awesome. 👍

THANK YOU AND KEEP THE GOOD WORK.

Great video!!!

i love this video, thanks

Mantaps Good! Love This channel!

That was great, thank you!

great video, how about exhaust ventilation systems which is the opposite?

Thank you for good detail’s of informations going keeping

Great video.

Thankyou so much for this sir

As someone who has been doin HVAC design for a while, this is very helpful if you’re trying to understand the theory and calculations for the design. But in the real world, no one is going to build ductwork like yours because everyone is cheap and prefers round taps and tee junctions.

@taylorpikor-zs3ym

11 ай бұрын

Are you interested in designing HVAC for a house I’m building? We’re planning on installing so I can’t find anyone who will just design it

Nice video! Grill style and size also effect static pressure but that's probably part of a different video

Wow that’s like our HVAC course lectures❤

Do you have a video that when you have a rectangular ducting instead of round ducting? Amazing video btw. thanks!

Great video!! Thanks for sharing!! One question: What about split systems? How can I size the ductwork? is it necessary?

dude, that's very helpful .. thank you so much :) !

This is so freakin helpful

thank so much for video,its very helpful, de argentina muchas gracias

Thanks for this video

You mention about heating and cooling load calculation on 1:15..have you already done the seperate video?

Very helpful

Any plans of making a tutorial on how to read complex ductwork drawings?

Hi @theengineeringmindset From where i can download the duct pressure loss chart ? and tee and fittings chart ? can you help ? i couldnt find it in your description below.

Hi, Please how we calculate the dynamic loss for damper, for example motorised damper as a fitting? Thanks

Thanks for this video....

Love from India ❤

Just want to say, this video fixed my exam project for HVAC

@salmankhanmohmand9174

15 күн бұрын

what is your project?

excellent video,,,

Awesome explanation. Really useful!! Do you have more videos on ventilation duck sizing as mentioned in this videos?

@EngineeringMindset

5 жыл бұрын

Yes have a look at out channel kzread.info/dron/k0fGHsCEzGig-rSzkfCjMw.htmlvideos

New subscriber here, great video

Good work .

Hi there Engineering Mindset! Your videos are all informative, do you have one for sizing of HVAC supply and return air grille? Thanks!

great job

Ok this is what I want to get into. Sounds really interesting. I currently have this oversized fan in my house. The duct looks waay too small and the noise is the biggest problem. I was thinking to increase the size of the duct to lower the noise but will try first to use these calculations to see if it would make any losses in terms of cooling. Do you (or anybody here in comment section) have any advices on how to lower the noise without loosing too much on cooling? Thank you in advance.

U so much good and talent never giveup go ahead 😍😍🤗🤗 but this video so much fast ...

Hi in this video u mentioned about another video of how to calculate heating and cooling load. Is there a link? thnks

god damn i love your content, thanks a lot

Thank You

THANK YOU

i actually use simscale what a peace of software

Great video this

Great video this can you make video on DX UNIT

Really good

Good day Sir. May I asked what maybe the factors I should consider in computing cooling load by if I am going to use manual calculation? My problem is that when using danfoss coolerselector2 (software) I am getting a different values which has a very big discrepancy.

I have two comments : First: pressure loss for Tee G-I (bend) is less than G-J (straight) How ? Second: we need link for the duct pressure loss chart thank you so much Great video about Duct Design

Great video, I just have one question. When determining the mass flow rate, in the image it says to use delta T in terms of Kelvin but I believe you used your 8 degrees Celsius to get the mass flow rate for each room? Should we convert that into Kelvin?

amazing..

can you also do a comparison of using one centralized hvac system versus mini-split units for the same size of a house having four bedroom and two floors. tks.

Thank you

Hi help please In case we have an hrv or an erv the duct of return air coming out from wc where shall we connect it? Would we mix it with fresh air?

Thanks

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?

Hi, Amazing video, really has helped me complete an assignment that I had no information on how to complete. However I'm still going to fail because you didn't calculate grilles. Also you stated that you would include the fitting tables you used in the video in the description, but it's not there and I have spend the last two hours looking for a god for saken fitting tables to no avail.

@EngineeringMindset

4 жыл бұрын

😕? I left 3 links for the exact books you need with all the information in, in the video description. You're welcome.

@TheMlkhk

4 жыл бұрын

@@EngineeringMindset Aha! I see, in that case, thank you. Your videos are just so well put together and beautifully explained, you honestly really helped me out. Thank you for replying.

Loved the video - can you make one with Imperial measurements for your slower US brethren? :) You can say - oh just use feet vs... However if the video was done all the way through with measurements we'd likely use, it would be easier to follow.

dear sir can u clear one thing when u were calculating for bend and other dynamic loss which is actually loss due to momentum change or velocity pressure loss means minor loss can u clear weather this is the only loss bend will generate or do we have to calculate friction loss in bend length separately which is considerd as major loss

Thanks for the video. Which software is best for industrial ventilation duct designing ? Most of the ducting part is round.

Hi, Another great video. Thank you! I have a question. For an equal pressure drop per meter in all of the ducts you used non-commercial sizes like 0.24 m or 0.39 m (at least in Portugal they don't exist). Actually, you will have to use the commercial existing sizes if this would be a real project, right? In that case, it is really possible to maintain an equal pressure drop per meter in all ducts?? Or actually you will never have this in real life, it is just a theoretical method and you just try to find the sizes that allows you to have the most similar pressure drop per meter as possible (per example, between 0.6 to 0.8 Pa/m)? Sorry if it is a stupid question. Thanks in advance. Best regards

@EngineeringMindset

5 жыл бұрын

Duct can be made to any custom size but it will cost more, to save money and use standard size only then adjustments need to be made to the calculations and reiterate

Very good

Do you do system designs for residential

how did you get velocity 5 m/s on the duct A, you didnt show it in the video, can somebody please axplaine?

What velocity should I use in the pressure loss formula if fitting is a straight rectangular diverging duct?

as a general rule how many watts are needed per meter squared while doing a fast calculation for cooling load? Thank you

@moinudheenmuhammed7514

4 жыл бұрын

According to thump rule 1 TR for 100 sqft , and it will change as per the height

Hi, nice video. please note that there is a little mistake in calculation. 1.026 * 8 = 8.208 kj/kg but it is calculated 8.028 kj/kg.

very nice sir, HVAC&R ENGINEER from pakistan

@EngineeringMindset

6 жыл бұрын

Glad you enjoyed it

Hi Paul, the duct loss graphs you showed is it plotted from the pressure loss equation for fully developed flows (also called the Darcy-Weisbach equation)? Also, in this case gravitational effects are not affect the air in the duct as the duct is horizontal. What if some part of the duct is vertical? If so will this change the way of calculation as shown in this video? Also, when using this equal friction method, are you assuming that the pressure loss per meter length is constant? Also, will you be showing the other 2 method as mentioned in the early part of the video?

@EngineeringMindset

5 жыл бұрын

Hello I'm actually not sure as the charts are from manufacturers and industry bodies, you would need to check with them. These are standard design guides for horizontal, vertical needs more calcs. I might cover the others it depends how well this video does and of there's a lot of interest.

@IceyJunior

5 жыл бұрын

@@EngineeringMindset I dunno about others, but I certainly do.

Thanks for the video, very helpful! I have a question, while calculating the pressure drop in tees (14:45) the pressure loss formula was used with the outlet velocity. However, in ASHRAE fundamentals book 2001, they state that for junctions, the pressure drop is referenced to the dynamic pressure drop for the common section (i.e., main section upstream). Therefore, for junctions, as far as I understand, the inlet velocity has to be used to calculate the pressure drop from the junction either the branched part or the straight part.. could you please enlighten me on this?

@kimjitchu3799

6 ай бұрын

what's the answer to this question?