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Thank you for clear details

I have a problem with the central air conditioning thermostat, manual train, manual train thermostat model 1577, error 2 appears

Sir please make more videos for ductwork i am doing ductwork want to learn more it is very helpful for me.thank you

Nice! My technician did that! Super effective with grime build up.

How do you get Q=1055 from flow rate calculation (condenser water)

Just what I needed, thank you.

is height of the duct same in everyroom if the height of the ceiling is same in every room.Or do we need to decrease the height according to cfm

It was definitely a very explanatory video. We would like to see a presentation where the fittings connection rules are explained in more detail with SMACNA and ASHRAE references.

thanks for the video and presentation. finally someone explained in full detail.

Thanks a lot for this..... God bless you

Could you provide us with an excel sheet log of Ashre and Smanca codes if you have one please Thank you

thank you for making this video

Thanks for the video. What is the process to calculate coil TR for the hospital Operation theatre? Plz make a video. Thank u!

bro, thx to explaining

Too good explanation of ahu working. Thank you.

You are my instructor in this season. thank you

Sir your every lecture has more and more depth, really informative. I want to get in touch with you sir

Thanks for this valuable information!❤

clear and professional explanation. btw, hope u cud include the maintenance of the equipment as well.

Where is the CAV discussion?

Really enjoyed the video. I thought you were going to explain at the end how the load is controlled. My question is I know we need a higher compressor output pressure on a hot day because when need to be able to have the outside air condense the vapor so it needs to be at a higher pressure to allow that to happen. What "controls" the compressor output pressure?

Good lecatcher eng sherif

1 Ton of cooling was based on 24 hour period (one ton of ice melting) and this is 12,000 BTU/Hour for 24 hours - Equivalent total Heat Energy Transfer. It takes one ton of heat to remove 288,000 Btus from the air in a day. That's the amount of Btus that must be removed to melt one ton of ice over 24 hours. Thus, a one-ton AC unit would be rated 12,000 Btus per hour.

Thanks, very helpful in studying for the Architectural Engineering PE exam

Hi Yu, just an idea, I've had clients ask me how to make their existing building cooling systems more energy efficient. So perhaps if you make a series of retrofitting and modernizing old systems to be more energy efficient that'd be helpful. For example, can retrofit the old AHU with EC fans, also afterwards showing how to calculate new efficiency all this. From our malaysia/singapore POV. Thanks in advance

Very helpful. Excited to see more such videos from you.

Yess

clear and well organised presentation. particular the visual makes it very interesting.

Name of the alternate equation used for colebrook

More of these type of site walk videos would be very helpful in teaching me what to look for when I go for site survey. Thx I'm a fresh grad new to hvac

Also, maybe explaining what is heat balance and it's importance. How to calculate total system efficiency. How to also size cooling towers and pumps

Would be delighted to watch more videos from Energy Efficiency/ Green Mark point of view. Also, comparing different cooling systems or brands or system designs for their efficiency. Also, maybe explaining what is a water cooled packed unit? etc. Many video opportunities here. Thanks in advance

Finally someone to explain this clearly from the Singapore/ Malaysia context. Love this

Do you find this type of slow and detailed tutorial helpful? Comment +1

My goodness dude, you saved my ass at work. Will be buying your courses as well. You the man!

Hello sir..I am an undergraduate student..currently I am in my training period.They use both VRV water cooling and Chiller water cooling..can you tell me how we control cooling load(cooling temperature in VRV indoor unit and AHU...😢is it same of different?Also there are no VAV boxes and VSD in AHU..star delta method used for starting method..

Amazing❤❤

Thank you for taking the time to make this presentation 👍🏽

Hope you could show examples for the other two methods in duct sizing:- static regain and constant velocity. Do like to share this 'equal friction method' video please.

Great content, thanks sir.

How was the video, is it too fast?

Awesome I m from India very good explanation.😊

6:59 how is the duct ended upward?

Thank you for the video. Please I want to know what happens when the big room temperature is higher than the setpoint; say 25°c, the medium room is 22°c, and the small room is 18°c. How does the AHU and the BMS handle this situation?

@aircondlounge if your AHU is CAV you can add sensible heat to get total sensible heat. if AHU is VAV then you can nod add the max of each zone sensible heat together

Nicely explained. Thanks a lot!

Im from indonesia , thanks sir you are amazing ,

are there VAV boxes with Larner-Johnson type valves? partially open buterffly valves produce turbulence at high CFM which is not only noisy but also increases pumping losses

Nice job explaining mini split efficiency.👍

clear and informative !