C406.2.5 On-site and off-site renewable energy. Projects installing on-site or off-site renewable energy systems with a capacity of at least 0.1 watts per gross square foot (1.08 W/m2) of building area in addition to the renewable energy capacity required elsewhere in this code shall achieve energy credits for this measure. Renewable energy systems achieving energy credits shall not be used to satisfy other requirements of this code. Off-site renewable energy systems shall comply with Sections C411.2.2 and C411.2.3. Credits shall be prorated from the table value in accordance with Equation 4-17.
(Equation 4-17)
 |
Where: | |||
AECRRa | = | Section C406.2.5 achieved energy credits for this project as calculated in accordance with Equation 4-17, limited to 50 percent of the required credits in Section C406.1. | |
RRt | = | Actual total rating of on-site and off-site renewable energy systems (W) for each type of renewable energy source in Table C411.2.1. | |
RRr | = | Rating of renewable energy systems required by Section C411.1, other sections in this code, or used to qualify for exceptions in this code (W). | |
RRb | = | 0.1 W/square foot (1.08 W/m2) | |
PGFA | = | Project gross floor area, square feet (m2). | |
AEC0.1 | = | Section C406.2.5 base credits from Table C406.2. | |
REF | = | Renewable Energy Factor from Table C411.2.1. | |
Informative Note: | On-site renewable energy may include thermal service water heating or pool water heating, in which case ratings in Btu/h can be converted to W where W = Btu/h / 3.413. |