Hybrid HPWH installs are particularly attractive in Chino because the warmer year-round ambient temperatures in garages mean HPWHs operate in their peak efficiency band more hours per year than in higher-elevation IE cities. SCE rebates stack on top of the operating-cost savings. Tankless conversions in older central Chino homes commonly require gas line upsizing - pre-1980 homes typically have 1/2-inch gas lines undersized for tankless input that can reach about 199,000 BTU. Resize typically $400-$800. Most modern Chino garages have roughly 700 to 1,000 cubic feet ambient space for HPWHs.