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IECC vs ASHRAE 90.1
August 23, 2017
3:19 pm
dunnm@ci.hoover.al.us
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Thanks Fred. I view it the same way. As predicted some engineers are using the ASHRAE 90.1 as a way to get around the fixtures from hot water source requirement. As much as I like the requirement of IECC C404.5 I cannot enforce it if the ASHRAE is used for the complete project.

August 16, 2017
5:37 pm
fgrable@iccsafe.org
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Seeing that there are no responses, here's my take:

C401.2 says you have a choice of paths for Commercial buildings: 1. Use ASHRAE 90.1  OR  use one of the other 2 paths of the IECC (2. or 3.) 

Where ASHRAE 90.1 is chosen, put the IECC book on the shelf and get the 90.1 book in your hands. You have committed to using 90.1 all the way and never look back to the IECC for your commercial building project.

Therefore, yes, IECC Sections C404.5-404.5.2.1 do not come into play as nothing in the IECC comes into play at that point.

August 2, 2017
7:10 am
dunnm@ci.hoover.al.us
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Section C401.2 (IECC 2015) states that energy requirements for  commercial buildings shall comply with   IECC or ASHRAE 90.1. What happens when the IECC addresses certain installation guidelines for installations  for systems and the ASHRAE does not ? For example: Section C404.5-404.5.2.1 gives requirements and  distances that a plumbing fixture can be from a hot water source.The ASHRAE 90.1 does not address this at all. Does that mean if an engineer chooses to follow ASHRAE 90.1 guidelines rather that IECC the requirements for distances form fixtures to hot water sources does not have to be met?