Clean Space and Water Heater Standards
Direct pollution from space and water heaters causes about 10% of all greenhouse gas (GHG) emissions and 5% of nitrogen oxide (NOx) emissions in California. These pollutants harm the environment and people's health. Setting limits on GHG emissions from new space and water heaters sold would help reduce pollution that causes climate change, such as carbon dioxide (CO2), methane (CH4), and nitrous oxides (N2O). These rules would help meet California’s climate goals, as discussed in California’s 2022 climate plan (see the 2022 Scoping Plan). Using zero-emission space and water heaters would also lower harmful air pollution caused by NOx, particulate matter (PM), carbon monoxide (CO), and other toxic chemicals. This would help California meet state and federal air quality standards and help protect public health.
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