Air Ballance HVAC 29-0

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Published 2014-12-26

With the Ebola issues I have been asked to explain "Air Balance" in hospitals and Isolations room several time. This video is on understanding isolation rooms and how the supply and return air works. I have been asked a couple times to explain this at work so I decided to do a video on it. The question was coming up concerning Ebola. We design hospitals, and I was being asked why cannot any hospital handle in Ebola patient. Essentially the answer is anyone can, some facilities/very few facilities have additional safeguards put in place as it relates to the infrastructure of the building that makes it easier. Isolation rooms with anti-rooms and then anti-rooms to anti-rooms provides an additional level where staff can change clothes and be monitored.

All Comments (21)

@designereats3661 1 year ago

Please keep making more videos. This is helpful!
@hvac01453 2 years ago

also, these returns should never be connected to the return air system, but rather, be designated as exhaust. Keeping in mind that all exhaust must be made up.
@grivas1161 3 years ago

Great vid Marty but be advised that per FGI Guidelines / ASHRAE and every State code i know, Laboratories must be designed to have negative pressure, not positive.
@Khaledajarrar 4 years ago

Perfect explanation thank you
@anshusingh8898 5 years ago

SIR THANKS FOR THIS VIDEO. I Want to know about how measured the duct size and its area.
@lgg6email871 4 years ago

Very useful & Easy to understand
@shkwaseem1571 6 years ago

This is it you did best you explained simple but the knowledge were more in this video thank-you
@bjornosterlund9354 4 years ago

Nice and instructive video, I hope I can use the part since we manufacure monitoring systems for this aplication I really liked the simplicity
@yashaswiniengineeringservi7296 5 years ago

thank you sir
@MartyHuie 5 years ago

I am just an architect. That is left up to my team. This is just a big pitcher look so arch. can understand what to look for
@bakytorazymbet3690 2 years ago

Thanks a lot But I think last two schemes are confused
@grfrjiglstan 1 year ago

Boy, this aged well.
@karinamiranda3887 7 years ago

Good
@sumitdubey8963 6 years ago

Is it any book which is good in air balance
@Eggemeyers 3 years ago

Is that a Lamy fountain pen?
@MartyHuie 8 years ago

1st of all I read this on my phone and meant to come back and reply and forgot, sorry LOL LOL Sorry for LOL but that is way over my head. I am not a Mechanical engineer only an architect, the video was basically really for architects understanding what their engineers are doing. Architects have to answer to clients many times on cost and wanting to make sure everyone understands where dampers go also My initial thought on your question, is I don't believe you're allowed to have return air in isolation, it should be exhausted we do not want to contaminate other people with the airborne illness of the person in the room. Now for talking positive pressure i.e. the room needs to be cleaner than the corridor I don't know that answer for sure with a positive pressure room you could return the air but a negative pressure room I believe it needs to be hundred percent exhausted
@nholdrcflyingandtouradvent9009 8 years ago

hi what was the ratio of CFM needed if I had a 100% return air to cool a certain room, specially for isolation room application for both positive and negative.
@hvac01453 2 years ago

would just like to note you used a return symbol for the supply @5:17, otherwise great info especially with Covid19 as a concern.
@sumitdubey8963 6 years ago

Hello sir, Could you tell me how to calculate how much air suck from room to create negative pressure in room
@alexv5229 3 years ago

Do you guys make good money doing this for a living???