How a boiler, fan coil unit, air handling unit and pump work together HVAC - Heating System 🔥🔥🔥

[@EngineeringMindset]

⚠️ *Found this video super useful?* Buy Paul a coffee to say thanks: ☕ PayPal: www.paypal.me/TheEngineerinMindset

[@haroldheckel1656]

A a!!

[@chefjonsf]

I’ve been doing water testing as a laborer in a similar system. This video helps makes sense of all the machinery around me. I’m just a laborer but hope to be an apprentice or journeyman when the opportunity comes. Thank you!

[@kool9174]

Any updates on your journey man? It seems you were in a good position to eventually become something more where you are. And you already have the attitude of wanting to learn.

[@coreinfrank1468]

I work in a building for 7 months now, i want to be a chief engineer, your videos help me so much to understand about chiller, boiler etc... You are the best, thank you so much again!!!

[@EngineeringMindset]

Keep learning as much as possible and you will get there, always ask why and keep a record of what you learn for future reference as you will slowly forget some details.

[@ericruiz9421]

the fact this video been made 7 years ago is still SPOT ON!! Thanks from a student in HVAC class of 2024

[@josifh-m0004]

New grad engineer(not HVAC), but got a jr eng role with an hvac company and this is helping a lot. Thanks

[@lukegale6499]

Excellent video and presentation with real life examples too. This is the best 13 minutes of CPD ive had in all the hours ive wasted on other CPD! Keep up the excellent work! cheers, Luke

[@suchcone]

I have been exploring an abandoned 1975 office block which has all its original machinery in the roof and basement. These videos really help work out what's what. This one seems to have an air ionisation feature and a rotating roll of filter medium. All very interesting to me! Thanks for the vids!

[@Lad-hs2sn]

2nd year apprentice , this helped a lot. Thank you!

[@carolagryma2955]

What a great video. I work in the sector in London and it aggravates me a bit the so frequent use of strange acronyms which I often believe is mainly a way to sound smart rather than actually saving time and I found this video as I never heard of LTHW before. It is supposed to stand for low temperature hot water but ultimately it is just a typical boiler system that pumps very hot water and returns a bit lower temperature water, correct? What is low temperature about it? What other system is it? I saw another description that says the following: "Mechanical Low-Temperature Hot Water (LTHW) systems are cutting-edge solutions designed to provide efficient heating for various applications. Unlike traditional heating systems, LTHW systems operate at lower temperatures, offering improved energy efficiency and reducing environmental impact. These systems typically use water as the heat transfer medium, circulating it through pipes to deliver warmth where it’s needed.". Is the point that it uses water as a means of transport rather than air as an airsource heat pump (ASHP if we are being silly).

[@GH-nu6pe]

My sincerest thanks to you for all your help and knowledge. Whenever I have a problem, I come back to your videos.

[@lubime10]

Excellente !!! Such much professional admirations for your dedication !!!

[@Plum_Bob]

Really appreciate your videos. Thanks for putting the work in.

[@80milekyle70]

Dude this was amazing. Thank you so much for showing real photos of the components you explained on the model.

[@mo-ev4dt]

Third year apprentice and your video helped me a lot Thank you 🙏

[@04DynaGlyde]

Thanks for the video, please keep it up. Please explain the whole STEAM system/plumbing, such as valves, pressure reducers, strainers, steam trap, condensate pumps. How they work and how to identify any problems and ware. What direction they flow, supply and return. Also what is inline with the supply, as well what is inline with return. What more is there to know about STEAM and how it works? Gary Gleason is great, I just cannot find any training videos from him.

[@m77ast]

I studied engineering at uni but been working in business but now getting back into engineering (my first love) 😀🤣 enjoying your videos

[@AkiraUema]

Best engineering channel on KZbin ever!

[@Follett2121]

Really great video!

[@AbdulMalik-cb8kx]

Brilliant explanation!! Been looking for something like this for ages

[@ronaldglenn6929]

Thank U Sir for this helpful video 😊,PeaceLove&GodBless

[@arturzych138]

Would be cool to see the calculations to this system, as well as to go deeper into the pressurization unit on how it works. AWESOME stuff though. Thank you

[@ScottyDog345]

Go to college

[@arturzych138]

@@ScottyDog345 They don't show this in college...

[@ScottyDog345]

@@arturzych138 I'm pretty sure they do

[@arturzych138]

@@ScottyDog345 So essentially you don't know. MEP work is not studied at universities. You learn thermo, heat tansfer, fluid mechanicals which are the fundamentals but not hydronics or fan coil sizing etc. This is specialized work.

[@ElectricAbundancePlanning88888]

Thank you for your helpful content- enjoyable!

[@A.M_009]

Many thanks for engineering mindset, I've learned a lot about industrial chillers system

[@dawoodhussain2085]

Great video , perfectly explained

[@asemahmed2618]

Thank you sir for your great efforts these info are excellent and clear Please continue in the field of hvac system

[@samuelecheverria7243]

Awesome video thank you for being very specific.

[@amandawen4158]

I hope I could watch the video before the start of my study this year.

[@naidavalieva5361]

Very useful and perfectly simple. Thank you very much!

[@fatmaruveydeozceylan9226]

Very helpful! Thank you.

[@pronounceword]

I like your video very much. It's really great. I'll keep an eye on your channel. I am your fan and I will support you.

[@arjunkishorechandra7292]

THANK YOU SO MUCH FOR THE VIDEO

[@inshaatiqa]

I really like your videos, very informative

[@minecraftman4112]

Very helpful!

[@ibrahimosman3393]

I love those videos very much

[@nz1229]

Top notch quality for these educational videos Great Job and thanks.

[@the.hungry.engineer]

Hi Paul, excellent video. As I've said in a prior comment on another video: your content is so useful to new mechanical engineers and I speak from experience. Something that you mention in this video is the dosing pot which got me thinking about chilled water (and heater or chiller heat recovery) water treatment. Do you have much experience in softening and controlling water quality, including legionella and other diseases, etc. on these systems and if so have you considered making a video on it? Many thanks for all the great content, Cheers!

[@EngineeringMindset]

Glad to hear you enjoy them. I was planning on covering this and still might at some poi point, the problem is it isn't going to be very popular and as the videos take so much time and really cost a lot to make, it isn't a priority video unfortunately.

[@the.hungry.engineer]

Yes, that makes total sense. It's interesting how your channel has evolved from a sort of HVAC&R tutorial channel, even offering chiller training, to the new mechanical engineering "how stuff works" platform. I'd be really interested to watch a video of you just talking about yourself, your engineering experience, interests, possible advice to young engineers, producing interesting content on engineering (which is normally considered a boring topic I think), etc. as well as your views on how your channel has evolved and grown over the years. Maybe one day you'll get around to it, but thanks for the reply and best wishes! Looking forward to the next video!

[@TH-eb5ro]

Great video, are the water pipe insulated?

[@huyhcl123]

Thank u for ur share it help me a lot . Love ya

[@bkairosh8164]

Great stuff!

[@Hambxne]

Fabulous video yet again!

[@pierre-richardbeaubrun5063]

Great video very informative

[@Andy-no9zl]

I would love to learn more about decarbonization options for commercial customers currently using gas boilers.

[@brendenyates8963]

Very helpful 👌

[@nftdojo]

Could I please ask what could be the possible reason(s) that some flats in the building doesn't have hot water while others have. For the flats that doesn't have hot water, the hot water comes for 30 sec than gone completely. Some suggested this is due to debris in the water circulation and would need a power flush. Would that work? Esp would the power flush cleans the part between the central loop and individual HEU? Many thanks for your answer!

[@fadeenanaa4495]

great job buddy thanks allot

[@lindsayclarke861]

excellente dont stop these videos!

[@tyzxcj34]

Great videos thank you for sharing.

[@uzoezioride9036]

Thank you very much

[@nooahchannel]

Nice video.

[@dickyrock1]

Thanks man great videos

[@dossube]

Great video, even made greater by St Jude commercial! Thank you bud.

[@martinmccrea6030]

Hi Paul, have you another video describing dosing pots and calorifiers in more detail? Love the channel

[@EngineeringMindset]

Hey, I don't think so. We will eventually get there though

[@nirayokifle5323]

Thanks for good explanation and if you could please explain as domestic heating system with two floor or three .

[@carlmac5221]

This is really helpful thanks

[@KEISHINZAN]

有難うございます。

[@tonygraham5782]

Could you do a video on how a CHP would interact within a plant room?

[@rickrooney7812]

First, I want to thank you for the great video. There is a ton of great information and it is presented well. I recommend this video to my students when they are studying commercial hydronic systems because it does such a great job of introducing them to this type of system. I do have one quick question. In your drawing, you have the expansion tank connected to discharge side of the primary loop pump. I have always connected the expansion tank on the suction of the pumping station to preserve NPSH. I am curious why you have it set up like this.

[@ericjeanneret2737]

Are you familiar with Munter's Units - I am wanting to learn more and I like the way you teach.

[@andreasphilippou1253]

Hi, I would like to ask you why we need FCUs if we have AHU? Nice videos btw - thank you

[@EngineeringMindset]

To distribute the air locally. Please watch our FCU videos

[@trustinmyselfalways6310]

That should make a Operating Engineer video game.

[@you-tell-me000]

Thank you

[@vipul_Kumar27]

The video was awesome :) can you make a video on types of valves used in Hvac pipe layout, their uses , n can you explain them via schematic. can you also explain more about the relationship between pressure , velocity & flow cuz this confuses a lot :)

[@yoss56ify]

Great explains

[@ashleysavagegilliam3180]

Can you explain the difference between a boiler feedwater pump and the primary/secondary hot water pumps? Thanks! Great videos!

[@maness2112]

The boiler feed water pump add water to the boiler. Seconday hot water pumps move hot water through a steam to hot water converter then to the heating coils

[@rodneyhickman825]

Boiler feed water pumps are generally referred to as pumps that supply steam in a steam system. Primary pumps pumps more water through a water system boiler to the header . The secondary pumps move the water out into the building

[@SSemi1]

Boiler feed water is mainly for steam boilers, primary secondary hot water pumps are for hot water boilers. The pump controller of the steam boiler senses the level of water in the steam boiler and calls for water from the boiler feed tank through pumps. Boiler feed tank is fed from the vacuum/condensate pumps which is fed from condensate return after the steam has reached the radiators and passed through steam traps. Steam traps basically ensure that steam condenses into water and should not allow steam to pass through. Steam boiler will do this to maintain the right water level for the steam boiler. Primary and secondary pumps are for hot water boilers described here. Primary pump is the pump that kicks on first depending on the needs/call for heat to the zoned spaces. A secondary pump can work in tandem (meaning they can split the load to reduce stress on the pumps) or operate separately so that if one pump goes down and needs to be serviced, the second one can run to provide heat.

[@atanquerel]

Thanks really good video super useful for me 👍

[@danny4982]

Nice video

[@l.crossjr]

Do you have a video on the difference between a 2 pipe system and a 4 pipe system? Meaning that a FCU coil an rather be cooling or heating Thanks

[@EngineeringMindset]

We have a video on FCU's, which briefly covers this kzbin.info/www/bejne/g6KwXohul8uneas but we have another video on fcu connects on the production list

[@mathwithshriyar9772]

hi . are you able to make video about boiled water schematic ?

[@nimbo9492]

Hi, Is low loss header the same as "Common Piping"?

[@hankuraj9892]

Good

[@fdggfgdfgd251]

Regarding the header... how does the water choose to go where it wants.. ? .. Do the individual pumps steal water from the header ?

[@strictlywrenching]

Do you not need zone valves on commercial heating systems?

[@rodneyhickman825]

Typically there is a valve in each space rather than a zone like in a home . For example each classroom in a school has its own valve . Anything less that 1 valve per space results in less comfort of temperate.

[@amritbains2285]

may be a stupid question but where the water came into the boilers? or I would say, can you please give more brief info on makeup water for both chillers and boilers

[@EngineeringMindset]

there will be another pipe connected to feed water into the loop. we've added boiler videos to the list

[@maness2112]

The steam is reclaimed as condensate then fed back into the boiler.

[@STEINYY]

May I ask why you didnt include water line to sink, shower going out from colorifier in the 3d model?

[@TechnoBite]

Paul, are you a commissioning engineer?

[@antonioleaomartins]

Hey, great video! Just one question, when should it be used a common header (Low loss header ) and when should it be used separate headers for primary flow and return flow? Thank you and keep up the good work!

[@nicolesandilands8693]

Is a system like this a risk for legionella? And if so, which parts of the system?

[@EngineeringMindset]

This type is a closed system so it's not really a risk. The makeup water tank might be though

[@maness2112]

@@EngineeringMindset Make up tank is usually heated to 215f so probably no legionella.

[@maness2112]

No part of a boiler system is at risk for legionella, just cooling tower loops.

[@rodneyhickman825]

@@maness2112 why would it be heated to 215 ?

[@nickledimez4012]

Thank you great video! I have a question tho the boiler water and domestic water are two different loops?

[@EngineeringMindset]

Yes, at least in modern buildings.

[@frankmills3756]

Does a domestic potterton floor standing kingfisher BOILER have an FCU AND WHERE IS IT SITES. NERVER HEAD OF IT been given a c2 rating by electrician carrying out an EICR

[@ibrahimosman3393]

I am very interested to be profissional engineer on this industry

[@md.asifiqbal3301]

When you wrote this comment, were you an engineering student then?? and where are you now???

[@arvindrannagasparan8353]

Professional*

[@ironmatic1]

In the US we call "calorifiers" indirect fired water heaters.

[@maness2112]

No we dont.

[@karlwex]

Hi, where does the initial inlet water come from? All I can see is the recirc water

[@cocoa-pf4fh]

Generally the supply water main comes from a city line at the street via an underground supply pipe. Same for things like sewer, gas, electric, all connect via underground mains owned by the city.

[@balarohith3425]

Sir...I have a doubt that is it compulsory to have a fan coil unit?

[@footage9172]

hello could you please send to us this diagram at the end of your video.

[@STEINYY]

why isnt the calorifier on the schematic?

[@docbrown7916]

Good vid, already familiar w it but always good to see a well done illustration, so many of the temp morons I worked w should've seen stuff like this, youtube didn't exist then though. Some temps should've been tossed off roof tops, those morons who ask why things say 'DON'T TOUCH, HOT' and they ask why, 'cause it's a fuckin boiler, it boils water', seriously, boss hired em, I had to work w em, got more done wo em.

[@svenbokulic9813]

A+++

[@sandyleewhite]

Can you please explain, why a 5 level apartment condo complex, be colder on the top floor, and warmer the further down the floors? We have 1 boiler, (used to have2), and this boiler is located on the roof, in an enclosed area. Does the water get distributed to the lower area of the building 1st possibly, and then does not have enough water for the top floor? Any response you could provide would be greatly appreciated , 😊

[@tankeryankercruz7795]

Tku

[@Ratman_Bejo]

hello mr how ore you?

[@NomadUrpagi]

I can't wrap my head around how the water coming back from secondary return doesnt get sucked back by secondary pumps again? I mean there are pumps pushing the water certain way but when two streams interact how do we ensure that the net flow is in the direction we want? Doesn't it go back sometimes?

[@youtune8671]

Jo Kah check valves, allow for only direction of flow.

[@MadgeBoyd-t1w]

Senger Passage

[@MrRaefel12]

Im trying to understand why commercial building would need heat pumps and a boiler system for space heating

[@EngineeringMindset]

Some examples: The heating load or use of the building has changed over time from design, its cheaper to add a heat pump than increase the pipework, pumps and boiler. It could be that it is more efficient to install a heat pump, for example on the weekend only a small section of the building is used and needs heating, the central plant is more expensive to run than a small heat pump

[@rodneyhickman825]

There becomes often a temperature where heatpumps don't heat well . If the systems use the same piping it's important that boiler not get so hot that it ruins the heatpump. Best to use condensing boilers for that reason

[@JohnPatrick-q3b]

Toy Harbors

[@EngineeringMindset]

Learn how *CHILLER's AHU, RTU* work together here: kzbin.info/www/bejne/i566iI2af7dknrM

[@llouissitto]

Thanks a lot for than amazing explanation!!!

[@KEISHINZAN]

有難うございます。