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C406 Commercial Efficiency Options in 2015 Washington Energy Code!*

Already the most rigorous in the US, the 2015 Washington State Energy Code contains section C406 with eight “additional efficiency package options” to provide a flexible way for projects to comply and take energy efficiency to the next level. The code requires new commercial buildings to incorporate two efficiency options, spurring the state towards its mandate to reduce building energy use 70% by 2031.