Patient Room

How do different ventilation systems compare?

Walt Vernon, PE, LEED AP, EDAC, FASHE

Principal, Chief Executive Officer
9/14/18

A number of years ago, working with Kaiser Permanente, Partners Healthcare, and Providence Healthcare, we led a multi-year, multi-University research project focused on the use of displacement ventilation for healthcare facilities. To date, only one hospital, Stanford’s Lucille Packard Children’s Hospital, has deployed the strategy on a wide basis.

Inexplicably (to us), the world seems more enamored with the notion of chilled beams as the “next new thing” for healthcare ventilation.

The truth, of course, is more nuanced. Neither system is black and white, better than the other. Both have advantages and offer opportunities, depending on particular climates and particular facility priorities.

Because our clients ask us about these systems over and over, we have decided to create a summary that will outline some of the advantages of different systems, particularly in the context of more conventional constant volume and variable volume systems.

Here, I am at something of an advantage. I am, you see, only an electrical engineer. Because I am not so deeply steeped in the nuances of the various systems, particularly in the context of different climates, I was able to convene several groups of Mechanical engineers to think about these systems and these features, and to synthesize their thinking into something that, admittedly, is “in the ballpark,” on average, rather than attempting to be precisely correct for any particular set of conditions.

I hope you find this helpful. If you see something wrong, it’s probably because I am an electrical engineer, trying to synthesize a consensus of what a collection of mechanical engineers would agree to. To the degree that they are right, I owe it all to the brilliant people I am blessed to work with. Let me know if you have questions or suggestions, and we can work together to keep his updated, as a service to the industry. I welcome and encourage further thinking!

Without further ado, here is our best thinking:

Mazzetti's Ventilation Comparison Table

 

 

 

 


Angelica Chow

Electrical Designer

Arash Guity, PE, LEED AP, CEM

Associate Principal, Senior Energy Consultant

Arturo S Salud

Associate, Senior Electrical Designer

Austin Barolin, PE, CEM, LEED AP O&M

Associate, Senior Energy Analyst

Bill Caron, PE

Associate Principal, Senior Mechanical Engineer

Bill Hinton, CNMT

Associate Principal, Technology Team Leader

Brennan Schumacher, LEED AP

Senior Associate, Senior Lighting Designer

Brian Hageman, LEED AP

Associate Principal, Discipline Leader

Brian Hans, PE, LEED AP

Senior Associate, Senior Mechanical Engineer

Brian J. Lottis, LEED AP BD+C

Associate, Senior Mechanical Designer

Brianne Copes, PE, LEED AP

Associate, Mechanical Engineer

Chris Hanzel, PE, LEED AP

Senior Associate, Senior Mechanical Engineer

Chris Johnson, LEED AP BD+C

Associate, Project Manager

Chris Sisco

Senior Software Engineer

Cynthia Mercante

Associate Principal, Director of Software Development

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