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Minimum Solar Zone Area. The solar zone shall have a minimum total area as described below. The solar zone shall comply with access, pathway, smoke ventilation, and spacing requirements as specified in Title 24, Part 9 or other Parts of Title 24 or in any requirements adopted by a local jurisdiction. The solar zone total area shall be comprised of areas that have no dimension less than five feet and are no less than 80 square feet each for buildings with roof areas less than or equal to 10,000 square feet or no less than 160 square feet each for buildings with roof areas greater than 10,000 square feet. A. Single Family Residences. The solar zone shall be located on the roof or overhang of the building and have a total area no less than 250 square feet. EXCEPTION 1 to Section 110.10(b) 1A: Single-family residences with a permanently installed domestic solar water -heating system meeting the installation criteria specified in the Reference Residential Appendix RA4 and with a minimum solar savings fraction of0.50. EXCEPTION 2 to Section 110.10(b)1A: Single family residences withthree habitable stories or more and with a total floor area less than or equal to 2000 square feet and having a solar zone total area no less than 150 square feet. EXCEPTION 3 to Section 110.10(b)1A: Single family residences located in the Wildland-Urban Interface Fire Area as defined in Title 24, Part 2 and having a whole house fan and having a solar zone total area no less than 150 square feet. EXCEPTION 4 to Section 110.10(b)1A: Buildings with a designated solar zone area that is no less than 50 percent of the potential solar zone area. The potential solar zone area is the total area of any low -sloped roofs where the annual solar access is 70 percent or greater and any steep -sloped roofs oriented between 90 degrees and 300 degrees of true north where the annual solar access is 70 percent or greater. Solar access is the ratio of solar insolation including shade to the solar insolation without shade. Shading from obstructions located on the roof or any other part of the building shall not be included in the determination of annual solar access. EXCEPTION 5 to Section 110.10(b)1A: Single family residences having a solar zone total area no less than 150 square feet and where all thermostats are demand responsive controls and comply with Section 110.12(a), and are capable of receiving and responding to Demand Response Signals prior to granting of an occupancy permit by the enforcing agency. EXCEPTION 6 to Section 110.10(b) 1A: Single-family residences meeting the following conditions: ATTY/ORD.522/CC ORD ALL ELECTRIC REACH CODES REV: 09-16-2020 RL Page 6 of 15 ORDINANCE NO. 2487 MUFF NO. 305