12L Natural Gas Tankless Water Heater Whole House Constant Temperature Instant Hot Digital Display Indoor Wall-Mounted with Accessories

large flow rate delivers on‑demand continuous hot water for whole‑house use—run a shower and kitchen sink at the same time without losing pressure or temperature. Constant temperature system with ±1°F precision and digital display lets you set exact heat levels, eliminating sudden cold water shocks during baths or dishwashing. Natural gas high‑efficiency burner maximizes combustion to cut gas consumption and utility costs, while reducing emissions—ideal for daily laundry and multiple faucets. Multi‑layer protection includes flame failure, overheat, anti‑dry, pressure relief, and freeze shut‑off—ensuring worry‑free operation in bathrooms, kitchens, or utility rooms. Complete accessory kit and compact wall‑mounted design enable fast indoor installation in apartments or houses, saving floor space while supplying hot water to every outlet.