The Bay Area is nearing implementation of zero-emission appliance rules to improve air quality and reduce climate warming emissions. First up is the transition to clean water heating. Luckily, heat pump water heaters (HPWH) offer a powerful opportunity for building owners to begin their electrification journey. These devices–which use electricity to move heat from air to water–are as much as 3.5 times more efficient than gas water heating and can save many customers money on their energy bills. Planners, building officials, and regional electeds have a big role to play in ensuring households can install heat pump water heaters smoothly, affordably, and equitably.