Local Jurisdiction Approval?

September 18, 2014

Marina Andrade

Sustainability Consultancy Services
Cushman & Wakefield

LEEDuser Premium Member

17 thumbs up

September 18, 2014

Hi,

What is "the local jurisdiction approval"?

You know what this is? How do I get this approval? With the designer?

I've worked in other certificate were accepted sizing calculations showing the natural ventilation system only.

Thank you!

Post a reply

Hernando Miranda

Owner
Soltierra LLC

LEEDuser Basic Member

344 thumbs up

September 18, 2014 - 11:33 am

Ivan,

1) Show that the project complies with local jurisdictional, minimum ventilation requirements, if the local requirements exist.

2) Show that the project complies with the LEED/ASHRAE minimum ventilation requirements.

Since the project complies with both LEED and local requirements "whichever is more stringent" is proven. There is no reason to compare the two sets of requirements to each other.

Marina Andrade

Sustainability Consultancy Services
Cushman & Wakefield

LEEDuser Premium Member

17 thumbs up

September 18, 2014 - 12:28 pm

Thanks Hernando.

The situation I have is that I have a project of a warehouse where there is natural ventilation in coverage.

This ventilation is "Enginnered Natural Ventilation System".

I showed all sizing calculations, and was asked about this approval of jurisdiction.

This ventilation is an exception from section 5.1 of ASHRAE 62.1 but do not know how to prove this, since the document submitted is the natural ventilation calculation description, considering all of the local climate parameters.

I need to ask something the ventilation designer, or just explain better what was considered?

Best Regards.

Hernando Miranda

Owner
Soltierra LLC

LEEDuser Basic Member

344 thumbs up

September 18, 2014 - 1:25 pm

Ivan,

You can compare the design air changes per hour (ACH) to the Vot (zone outdoor air flow) calculated using the ASHRAE 62.1 calculations: Sections 6.2.2 (Vbz = [Rp x Pz] + [Ra x Az]; and then Voz=Vbz/Ez) and either 6.2.3 (Single-Zone) or 6.2.4 (100% OA). Vot will likely be equal to Voz.

Your Ez is probably 0.8 (see ASHRAE 62.1 Table 6-2). It might be 1.0 but claiming a lower Ez helps avoid further questions from the reviewers.