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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)?


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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

ASHRAE 55 Compliance in Dubai

I am working on a project in Dubai, the design engineer has performed a psychrometric analysis using 46.0°C (DB) and 29°C (WB) for climatic design cooling conditions. The project space is cooling only, as there are no heating requirements in Dubai. How would this be documented on the LEED IEQc7.1 form? Would we use the dry bulb or wet bulb temperature for the cooling climatic design condition? Do we leave the heating design condition field blank, and write a narrative explaining the extreme climate where the project is located?

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Wed, 06/17/2015 - 07:54

In a current project in Nigeria there's no heating requirement. We filled the cooling design condition in the heating section as well and commented this in special circumstances.This was ok for the reviewer.
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Cam Fitzgerald
Energy Engineer
7group
LEEDuser Basic Member
18 thumbs up

Wed, 06/17/2015 - 11:55

The temperature that should be entered is the Dry Bulb temperature. A brief narrative including the average low temperature should confirm that no heating is required.

Wed, 06/17/2015 - 15:54

Thank you for the feedback Jens and Cam!

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