What is the code for water heaters?
What is the code for water heaters? 2 Equipment Efficiency. Residential water heaters are regulated under California's Title 20 Appliance Efficiency Regulations, Section 1605.1(f). These regulations align with the federal efficiency standards for residential water heaters. Does hot water require a code? No there is no code language addressing a minimum domestic hot water storage temperature. The plumbing codes define hot water as follows: Hot water - Water at a temperature greater than or equal to 110°F (43°C). This does not mean it is good design to store the hot water at 110°F. Is a hot water heater expansion tank...