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Water Heaters

​On March 25, 2010, the Sac Metro Air District Board of Directors approved amendments to Rule 414 - Water Heaters, Boilers, and Process Heaters Rated Less Than 1,000,000 BTU Per Hour. These amendments establish lower NOx emission limits for water heaters sold and/or installed in Sacramento County. As of January 1, 2011, a person shall only distribute, offer for sale, sell, or install a water heater, boiler, or process heater with certified NOx and CO emissions less than or equal to Rule 414 limits.

​Heat Input Range and TypeNOx Limit Nanograms per Joule of Heat Output (ppm @ 3% O2)​​CO Limit ppmv @ 3% O2 ​​
​

​< 75,000 Btu/hr

Mobile Home

All Others

​

 

​

40 (55)

 10 (15)

​

 

No Limit

No Limit​

​75,000 to < 400,000 Btu/hr

Pool/Spa

All Others

​

 

​

​40 (55)

14 (20)

​

 

​

No Limit

No Limit

​400,000 to < 1million Btu/hr

All Types

 

​​14 (20)

 

​​400

 Anyone who sells offers for sale, supplies, or installs equipment not meeting the requirements of Rule 414 is subject to a Notice of Violation and penalties as specified in California Health and Safety Code Section 42402.

If you have any questions concerning these requirements, email compliance@airquality.org or call 279-207-1122 ext. 14.

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