The first-in-the-nation air regulation will limit the sale of residential gas water heaters in the region. It goes into effect in 2028, with some major exceptions.
San Francisco Bay Area regulators have finalized a long-awaited rule that limits pollution from residential water heaters.
In 2023, the Bay Area Air District board passed first-in-the-nation regulations setting zero-nitrogen-oxides (NOx) emissions standards on new home water heaters and space-heating systems sold in the region…