HVAC system layout also plays a large role in mitigating background noise from mechanical equipment. It is important to avoid placing fans and mechanical systems directly above classrooms and core learning spaces and insulating ducts. Projects may also wa

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HVAC system layout also plays a large role in mitigating background noise from mechanical equipment. It is important to avoid placing fans and mechanical systems directly above classrooms and core learning spaces and insulating ducts. Projects may also want to consider displacement ventilation, which uses lower-velocity air and is quieter. 

Selecting mechanical equipment with noise levels in the 60 Hz and 125 Hz octave-bands will help to mitigate noise from HVAC systems and the associated costs needed to reach the acceptable background noise levels. 

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Selecting mechanical equipment with noise levels in the 60 Hz and 125 Hz octave-bands will help to mitigate noise from HVAC systems and the associated costs needed to reach the acceptable background noise levels. 

Isolating mechanical equipment and installing low-noise and low-velocity equipment, including fans and boxes, will help project teams meet the HVAC background noise level requirements. 

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Isolating mechanical equipment and installing low-noise and low-velocity equipment, including fans and boxes, will help project teams meet the HVAC background noise level requirements. 

When designing a partition to meet the required STC rating you will also want to consider wall massing (massive walls generally block sound), breaking the path of vibration and sound (staggering studs and decoupling), providing absorptive materials (added

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When designing a partition to meet the required STC rating you will also want to consider wall massing (massive walls generally block sound), breaking the path of vibration and sound (staggering studs and decoupling), providing absorptive materials (added insulation), and sealing penetrations (from plumbing and HVAC systems). See the STC Introduction in the Documentation Toolkit for more detail on determining the STC rating of various partition types. 

Project teams often confuse CFCs, HCFCs, and HFCs.Chlorofluorocarbons (CFCs) have been completely phased out of new equipment in the U.S. Hydrochlorofluorocarbons (HCFCs), the transitional substitutes for CFCs, are in the process of being phased out.

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Project teams often confuse CFCs, HCFCs, and HFCs.

U.S. production of CFCs stopped in 1996, although there was no hard cutoff date for manufacture or installation of CFC-based equipment. So if your building was built in the late 1990s or later, your HVAC systems are less likely to contain CFCs and you are

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The credit forms for EAp3 and EAc5 are linked. If you are pursuing EAc5, make sure that the credit form version is the same as EAp3. If the credit forms for EAp3 and EAc5 are different versions (which would potentially happen if you attempted the EAc5 in LEED Online at a later date that when you had attempted EAp3) the form for EAc5 will not auto-populate, and you will not be able to complete the credit form. The best thing to do is to request updated forms from GBCI before submitting your application.

Equipment that contains less than 0.5 pounds of refrigerant is not considered part of the base building system and is exempt from this prerequisite. Examples may include small HVAC units, standard refrigerators, and small water coolers. On the other hand,

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Equipment that contains less than 0.5 pounds of refrigerant is not considered part of the base building system and is exempt from this prerequisite. Examples may include small HVAC units, standard refrigerators, and small water coolers. On the other hand, if any of this equipment does use more than 0.5 pounds of refrigerant, you must include it in your data for this prerequisite.

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