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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

Naturally Ventilated, Mechanically Cooled space

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Gabriela Crespo
BECxP, CxA+BE, LEED AP BD+C, O+M
Revitaliza Consultores
LEEDuser Basic Member
18 thumbs up

In ASHRAE 55, Section 5.3 Optional Method for Naturally Conditioned, it mentions that "There must be no mechanical cooling system for the space". We are working on a residential project where each apartment has its individual conditioning system, it provides heating and cooling, but the ventilation is through operable windows. Are we not elegible for this credit because of the conditions?

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Tue, 12/01/2015 - 16:15

Your are not eligible to comply using Section 5.3. As the standard states, when a building has no mechanical cooling "occupant's thermal responses...may differ from thermal responses in buildings with centralized HVAC systems". Since your building has cooling, one would not expect this adaptive thermal comfort effect. You can still show compliance following the mechanical cooling pathway. (i.e. the standard path)
Profile picture for user gabriela
Gabriela Crespo
BECxP, CxA+BE, LEED AP BD+C, O+M
Revitaliza Consultores
LEEDuser Basic Member
18 thumbs up

Tue, 12/01/2015 - 16:38

Thank you Christopher, this helps a lot!

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