Indoor Residential Tankless Water Heaters

Onsen's indoor residential water heaters are equipped with an electronic ignition powered by a standard 120V outlet, activated by water pressure and flow. Its direct vent system pulls air from the outside, preventing the loss of warm indoor air and allowing for flexible installation even in restricted spaces.

Our water heaters require less than 1 amp of power, making them perfect for both remote off-grid locations and residential installations. With minimal energy consumption, they offer reliable hot water while being energy-efficient, whether you're using solar power or standard electricity.

Designed with an advanced control system, our water heaters continuously monitor water temperature and adjust the burner for a stable, reliable hot water supply. The LED display and intuitive control panel allow you to easily view and adjust current settings, ensuring the perfect temperature every time.

Enjoy fast, reliable shipping from Canada, a 60-day refund/return policy, bilingual local support, and delivery in 1–6 business days via Canada Post or Purolator.