Hi,
We have Library LEED Project and I'm using the template under LOv3. Can somebody please help me how to fill-up the Clothing level (CLO) and Metabolic Rate (MET)?
Appreciate any inputs.
thanks,
Forum discussion
NC-2009 IEQc7.1: Thermal Comfort—Design
Hi,
We have Library LEED Project and I'm using the template under LOv3. Can somebody please help me how to fill-up the Clothing level (CLO) and Metabolic Rate (MET)?
Appreciate any inputs.
thanks,
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Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11478 thumbs up
November 19, 2010 - 9:13 pm
Susan, what specifically are you not sure about?You may find our tipsheet on Understanding Thermal Comfort Factors useful.
susan eguia
LEED Coordinator/Construction Administrator/Business DevelopmentBuilding Solutions Group, Inc.
59 thumbs up
November 22, 2010 - 4:26 pm
Tristan,
The LEED form requires me to fill-out the CLO and MET for Spring, Summer, Fall and Winter based on space activity type i.e. libraries, office space, etc..
Does it mean we need to make assumptions for each season based on the # of occupants? How will i categorize it for male and female? This looks tedious on our part.
thanks.
Christopher Schaffner
CEO & FounderThe Green Engineer
LEEDuser Expert
963 thumbs up
November 22, 2010 - 5:02 pm
It sounds like you understand what is required.
MET should be identical in all seasons. CLO will not be. We typically don't breakdown male vs. female.
susan eguia
LEED Coordinator/Construction Administrator/Business DevelopmentBuilding Solutions Group, Inc.
59 thumbs up
November 22, 2010 - 5:42 pm
I understand the requirement, but i don't know how can i get the data for CLO.
If you don't breakdown the male vs. female, then why the ASHRAE 55-2004 standard, itemized the garment insulation between male & female?
Also, from your tipsheet of understanding Thermal Comfort Factors, it was mentioned that CLO can be determined based upon entire outfit, and/OR by summing the total CLO values for each article of clothing?
Can i just select from 0.5 to 1.5 ranges given by ASHRAE 55 standard?
James Del Monaco
Sustainability Director, PEP2S Engineering, Inc.
64 thumbs up
November 23, 2010 - 6:10 pm
As part of ASHRAE standard 55, in appendix B, there are tables B1 and B2. Table B1 has clothing values for typical ensembles and table B2 has itemized clothing values. If you see a clothing ensemble in Table B1 that represents the typical clothing your occupants wear then you can use the value from there, otherwise you can use an itemized list of clothing and sum those values to achieve the overall clothing level for the occupant(s). Also, depending on the project, you should consider breaking down the occupants between male and females, although this is not required. If both males and females would be wearing similar clothing levels, then there is no need to separate them. ASHRAE 55 does not state that men and women are separate. You would need to examine the clothing values and metabolic rates for all occupants, and if they happen to be different for male, female, or even some other breakdown, then that is how you break it down. Depending on where your clothing values end up (and also your metabolic rates), you can determine if you should puruse the graphical method of the computer model method. You have to evaluate if you fall between 0.5 and 1.5 Clo, because there are instances where you would fall outisde this range. Hope this helps.
susan eguia
LEED Coordinator/Construction Administrator/Business DevelopmentBuilding Solutions Group, Inc.
59 thumbs up
November 23, 2010 - 7:37 pm
Thanks James, appreciate your inputs.
Here's my follow-up questions:
1. The template requires 4 seasons, so i will make a breakdown for each of them per occupants?
2. This is a Library, we never know how many males/females should come in. So, how can we determine the values of males/females?
3. I found sample table from ASHRAE 55, do you have an idea as to how do they get those values, maybe i could use it as reference?
James Del Monaco
Sustainability Director, PEP2S Engineering, Inc.
64 thumbs up
November 24, 2010 - 10:53 am
Susan,
1. You need to fill in the template for all 4 seasons. you would need to breakdown each season for the occupant breakdowns based on your project.
2. This credit does not care about quantity of occupants (males/females/or other breakdowns). It only cares about the different types of occupants. Like I mentioned in my earlier post, if males and females wear the same clothes and are performing the same activity levels (and therefore the same metabolic rate), there is no need to separate males and females. For example, in a kitchen, males and females may be required to wear the same chef clothes and would be performing the same activities, then they would have matching clothing values and metabolic rates, and there would be no need to separate them. Quantity of occupants is not the concern here with regards to ASHRAE 55. Other LEED credits are concerned with quantity of occupants, but not this one.
3. Refer to the tables B1 and B2 I mentioned in my previous post. Table B1 does give you sample ensembles of clothing. You can use these values if your project has similar clothing. Otherwise you can use Table B2 and sum up the clothing values for whatever clothes your occupants will typically wear. I should note that you should select the clothing values based on normal occupant attire. You should discuss with the Owner what their dress code is. You don't need to address abnormalities in the dress code, you should do what is standard based on the Owners requirements. For one office the dress code may be dress slacks and a button down shirt while for another office it may require a suit and tie. These are both offices but would have different clothing values. It's all based on the dress code for that particular project.