Under California's Title 24 Energy Code, which of the following is required for all new residential construction to meet energy efficiency standards?
Correct Answer
B) Solar-ready construction with conduit and panel space
Title 24 Part 6 Section 110.10 requires solar-ready construction for new residential buildings, including designated solar zone areas, electrical panel capacity, and conduit pathways. This California-specific requirement supports the state's renewable energy goals and differs significantly from other states' energy codes.
Why This Is the Correct Answer
Title 24 Part 6 Section 110.10 requires 'solar-ready' construction for new low-rise residential buildings. This includes a designated solar zone on the roof, electrical panel capacity reserved for future solar, and conduit pathways from the roof to the electrical panel. This California-specific mandate supports the state's clean energy goals and was codified to make future solar installation easier and less costly.
Why the Other Options Are Wrong
Option A: Double-pane windows only
Double-pane windows alone are not the specific requirement singled out in Title 24 for all new residential construction. While energy-efficient glazing is addressed in Title 24, the code does not universally mandate only double-pane windows as a standalone requirement — prescriptive compliance involves multiple envelope and system components.
Option C: Radiant barrier roof sheathing in all climate zones
Radiant barrier roof sheathing is required in specific California climate zones (typically hot climates, such as Climate Zones 2–15) but NOT in all climate zones. Applying it universally would be incorrect — the requirement is climate-zone-dependent, making this a partial truth rather than a universal rule.
Option D: High-efficiency HVAC systems rated at 16 SEER minimum
A 16 SEER minimum for HVAC is not a blanket Title 24 requirement for all new residential construction. Title 24 sets minimum efficiency requirements for HVAC equipment, but the specific SEER threshold depends on system type, climate zone, and configuration. 16 SEER is not the universal standard cited in the code.
Memory Technique
California = Solar State. Title 24's headline residential requirement: SOLAR-READY. Think: every new California home must be 'ready to go solar' — conduit, panel space, and roof zone designated. This is California's energy signature requirement.
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