Can a single HVAC system be installed to serve both the primary dwelling and attached ADU?

No. CMC 311.4 prohibits the transfer of air between adjacent dwelling units. Separate HVAC systems are required for each dwelling unit.

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1. Can a portion of an existing house, garage or other accessory structure be converted to an Accessory Home?
2. Can an Accessory Home be constructed above or attached to a garage?
3. How close can an ADU be to a property line or adjacent building?
4. Are automatic sprinklers required in my ADU?
5. Can I convert my existing garage to an ADU?
6. What kind of egress requirements apply to my ADU?
7. Can a single HVAC system be installed to serve both the primary dwelling and attached ADU?
8. Does my ADU require separate utility meters?
9. Does my ADU require solar?
10. Does my project need to comply with Wildland Urban Interface requirements?