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Robert Bean posted a blog post
Zoning: An Art and Science
An excerpt from "Thermal Comfort Principles and Practical Applications for Residential Buildings" available for free from <https://www.linkedin.com/groups/13843486/>"Zoning is both an art and science which strategically must consider the representat…
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Apr 30
Robert Bean commented on Robert Bean's blog post It's published and it's free, Thermal Comfort Principles and Practical Applications for Residential Buildings
"From the book, zoning as an art and science...an accurate assessmen...https://www.linkedin.com/groups/13843486/"
Apr 20
Robert Bean and Diane Chojnowski are now friends
Apr 18
Robert Bean updated their profile photo
Apr 18
Robert Bean posted a blog post
It's published and it's free, Thermal Comfort Principles and Practical Applications for Residential Buildings
Thermal Comfort Principles and Practical Applications for Residential Buildings. A guide to using the fundamentals of ASHRAE Standard 55 Thermal Environmental Conditions for Human Occupancy; for influencing architecture, building enclosures, interio…
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Apr 17
Robert Bean commented on Robert Bean’s status
"Obtain link and password from here https://www.linkedin.com/groups/13843486/"
Apr 1
Robert Bean commented on Robert Bean’s status
"A guide to using the fundamentals of ASHRAE Standard 55 Thermal Environmental Conditions for Human Occupancy; for influencing architecture, building enclosures, interior designs, and electrical/mechanical (HVAC) systems for improving thermal conditi…"
Apr 1
Robert Bean replied to Don Fugler's discussion Depressurization/make-up air issues in Kitchen Ventilation
"Don,
My concern is one of liability. 
Even with sealed combustion devices the manufacturers (for example) of gas fireplaces have in the "fine print" warnings for potential back drafting with CYA clauses and advisement for MUA...no one reads these bu…"
Aug 27, 2018
Robert Bean replied to Robert Bean's discussion Low velocity consequences in Kitchen Ventilation
"Hi Chris,
Today there is no research that I can find to support less than 500 fpm.
As noted above we have much higher velocity systems without noise issue due to locating the fan away from the hood, minimizing fittings and using silencers.
What I am…"
Jun 14, 2018
Robert Bean replied to Robert Bean's discussion Low velocity consequences in Kitchen Ventilation
"Hi Tom,
All good comments and questions that need to be explored for residential projects.
We have large residential system (1200 cfm) designed for 800 to 1000 fpm with single inline fan located 30 to 40 feet away from the range hood...two silencers…"
Jun 14, 2018
Robert Bean replied to Robert Bean's discussion Low velocity consequences in Kitchen Ventilation
"Below is a copy/paste from a side bar with Rick Karg...joining as soon as he gets approved...


Rick KargRobert, regarding your low velocity consequences posting: I don't think the velocity is an issue. Velocity is primarily limited because of noise…"
Jun 7, 2018
Robert Bean replied to Robert Bean's discussion Low velocity consequences in Kitchen Ventilation
"Interestingly the 500 fpm was a drastic reduction from a previous requirement of 1500 fpm established by NFPA following an ASHRAE research project which looked at the impact of velocity on grease deposits ...100 cfm in an 8" duct is less than 300 fp…"
Jun 7, 2018
Robert Bean posted a discussion in Kitchen Ventilation
Low velocity consequences
Has anyone looked at the low velocity consequences as a result of marrying these statements pulled from the resource documents…“Use 8-inch round smooth metal ducts” and “ASHRAE and other groups recommend a minimum of 100 cfm.” and “HVI recommends 10…
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Jun 5, 2018