Solar Water Heating - Heschong Mahone Group
Solar Water Heating - Heschong Mahone Group
Solar Water Heating - Heschong Mahone Group
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Measure Information Template Page 4<br />
c. Type of<br />
Change<br />
Prescriptive Requirement - This proposed measure would increase the prescriptive<br />
required fraction of water heating provided by solar water heating for single-family<br />
housing with electric resistance water heating systems from the existing 25% to a<br />
climate-zone dependent percentage.<br />
For the non-residential Base Code, the proposed measure would introduce a required<br />
fraction of water heating provided by solar water heating for restaurants with natural-gas<br />
water heating and at least 12,500 sq. ft of conditioned and unconditioned floor area.<br />
For the non-residential Base Code, the proposed measure would introduce a required<br />
fraction of water heating provided by solar water heating for restaurants with electric<br />
storage water heating and at least 1,500 sq. ft. of conditioned and unconditioned floor<br />
area.<br />
Modeling - This measure would modify the calculation procedures and assumptions used<br />
in making performance calculations, by introducing an hourly model into the Alternative<br />
Calculation Method (ACM) Manual to more accurately reflect solar radiation and match<br />
the hourly Time Dependent Valuation of electricity used by the CEC in Title 24<br />
development and compliance. This measure also moves "<strong>Solar</strong> <strong>Water</strong> <strong>Heating</strong>"<br />
capabilities which are currently in "1.2 Optional Model Capabilities" of the ACM Manual<br />
and places them into "1.1. Minimum Modeling Capabilities."<br />
The proposal measure also introduces a reduction in the water heating energy budget in<br />
the performance approach for restaurants.<br />
The proposal introduces a differentiation of restaurant occupancy types, with new<br />
definitions of “quick-service” and “full-service” restaurants. Finally, the proposal also<br />
introduces hot water demand load profiles for each into the ACM, while integrating these<br />
load profiles into the F-Chart tool.<br />
Other - The change would modify the language and visual representation of the solar<br />
fraction requirement in the standard, compliance manual and compliance form<br />
2013 California Building Energy Efficiency Standards March 2011
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