CERTIFICATE OF COMPLIANCE – USER INSTRUCTIONS NRCC-ENV-03-E
Solar Reflectance Index Calculation Worksheet
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NRCC-ENV-03-E User Instructions
A. Product Information:
1-5. CRRC Product ID Number, Manufacturer, Brand, Model and Product Type should be based on product
information from the Cool Roof Rating Council’s website. The product directory is located at
http://www.coolroofs.org/products/search.php
and may be browsed either by viewing all products or by using
the search function to find a specific product. Keep in mind that inclusion in the directory does not guarantee
that a product will meet the energy requirements.
2. Roof Slope: Designate the roof slope as either “less than or equal to 2:12”(≤2:12) or “greater than 2:12”(>2:12).
A ratio of 2:12 is approximately 9.5 degree slope. The SRI requirement is based partly on the slope of the roof.
B. SRI Calculations:
1. Aged Reflectance Listed with CRRC: Indicate whether or not your product’s 3-year aged solar reflectance is listed
on the CRRC website by selecting either “yes” or “no” from the drop-down list. Depending on your selection, the
boxes that you will not need should become blacked out.
2. CRRC Listed Aged Solar Reflectance: If you selected “yes” to box 1, input the CRRC listed 3-year aged solar
reflectance.
3. Initial Solar Reflectance: If you selected “no” to box 1, input the CRRC listed initial solar reflectance.
4. Calculated Aged Solar Reflectance: No input required. The calculator will calculate the aged reflectance using the
initial reflectance once you hit enter or click outside the box. Note that the solar reflectance value will be a
decimal between 0 and 1.
5. Thermal Emittance: Input the value for thermal emittance obtained from the CRRC. This value can be either the
initial thermal emittance or the 3-year aged value. Note that it also must be a decimal between 0 and 1.
C. Results:
1. Solar Reflectance Index: If you have entered values for both solar reflectance and thermal emittance, once you
press enter or click outside the box, the calculator will calculate the final SRI value. It may take a few moments
to obtain a value or the SRI depending on the values you inputted for reflectance and emittance.
CA Building Energy Efficiency Standards - 2016 Nonresidential Compliance January 2016