For science labs that have room exhaust fans, how are they considered in the context of background noise? Are they excluded because of infrequent use, or are they typically required to be...

Does anyone know where I can find sound absorption coefficients for metal roof deck? NOT acoustical metal deck, standard metal deck. No manufacturer I can find publishes them nor are they in...

We have a schools project that is utilizing heat pump units which are located in the individual classrooms in a mechanical closet. In order to meet the prerequisite the noise genreated from the...

Does anyone know if you need to subtract the area of the lights in the room from your ceiling area? The example on page 431 of the reference guide does not show any reductions for lighting.

Is the requirement to reduce background noise only for noise from HVAC equipment? In naturally ventilated spaces, do we need to account for outside noise? For Credit 9 as well?

We are trying to calculate reverberation time in a classroom which has a daylight monitor in the ceiling. The monitor takes up about 30% the total area of the room Can we regard the "hole" in the...

We are currently calculating our sound absorption coefficients for LEED for Schools 2007 EQ Prerequsite 3 and have formulated a couple questions.

1: Should we include built-in casework in...