Hello Sim Folks,
I have two questions regarding 90.1-2010 ECB and PRM. Our building code references ECB and LEED references App. G PRM.

Shading due to adjacent buildings ? should this shading be modeled for:
ECB ?
PRM ?

90.1-2010 ECB doesn?t directly refer to shading by other buildings.
App. G as detailed in the PNNL PRM Manual states that external shading from other buildings or other objects can be modeled for 90.1-2010 PRM.

Therefore, I believe one can choose to model that shading or one can ignore it.

Daylighting controls ? should daylighting controls be modeled for:
ECB ?
PRM ?

Re. Daylighting:
Reviewing Section 11.1.4 Compliance with Section 11 will be achieved if:

a. All requirements of Sections 5.4, 6.4, 7.4, 8.4, 9.4, and 10.4 are met;

Table 11.3.1, 6. Lighting, Baseline: Lighting controls shall be the minimum required.

These clauses lead me to believe that daylighting controls should be modeled in the baseline using the correct side-lighted and top-lighted area calculations.

App. G as detailed in the PNNL PRM Manual is clear ? daylighting controls are to be modeled in the baseline.

Any and all thoughts appreciated.

Christopher R. Jones, P.Eng.
Technical Specialist
Sustainability & Energy

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T +1 416-644-0252

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Toronto, ON M4P 1E4 Canada

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