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FAQs about IEQc7.1 :

ASHRAE-55 comfort criteria ask for space air speed. Is this the same as the supply air volume measured in cubic feet per minute (CFM)?


What should I do about a warehouse space?

How can thermal conditions for areas with metabolic rates outside of 1.0–1.3 be determined? (Per ASHRAE Standard 55-2004 Section 5.2.1.1, Figure 5.2.1.1 can be used for areas with metabolic rates between 1.0 and 1.3).

There are a few spaces in my project that can’t meet these requirements. Can’t I just exclude them?

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NC-2009 IEQc7.1:Thermal Comfort—Design

Which MRT to use

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Jordan Kirrane
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Hurley Palmer Flatt
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Hi, I have the annual hourly mean radiant temperature results (from the energy model simulation). I'm wondering what MRT you have used in the past if you have all of these figures? How do you choose the MRT figure when you have all this data available for the entire year? Thanks,

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Tue, 12/01/2015 - 16:24

You probably have more info than you need to document the credit. ASHRAE 55 uses the "operative temperature", which is a combination of air temperature, mean radiant temperature (MRT) and other factors. Unless you've got a space with a MET rate above 2.0, showing that air temperature and humidity stay within the comfort zone is usually sufficient to document the credit.

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