Rinnai's high-efficiency non-condensing outdoor tankless natural gas water heater models offer the most advanced technology for your home. Now, with a cleaner internal layout, a new sliding bracket for easier alignment, and an LED display that allows you to set reminders and see error codes, our water heaters are designed to save you time and money with faster installation and better serviceability. Designed to be extremely compact, this small water heater only takes up the space of a small suitcase, letting you reclaim some of your home's most valuable real estate. This smart on-demand hot water heater can be made even smarter with a Rinnai Controlr for WiFi connectivity (not included).