City permit rule
What the Air District requires
Sunnyvale sits inside the Bay Area Air District, whose jurisdiction takes in Santa Clara County and its neighbors. The district's zero-NOx standard reaches residential furnaces manufactured after January 1, 2029.
- If your furnace is near the end, ask us about a heat pump as well as a gas furnace.
Checked November 2026Bay Area Air District, Building Appliances Rule Implementation
Checked on the Air District's page, November 2026.






