Endless On-Demand Hot Water: The Orbek tankless water heater gas provides up to 4.3 GPM and 100,000 BTU, serving 2-3 fixtures simultaneously for comfortable use throughout your home Safety & Reliable: The Orbek tankless gas water heater is CSA certified and packed with advanced safety features, including dry combustion protection, overheat protection, water leakage protection, flame failure protection, and high water pressure protection etc Energy Efficient: Crafted from high-quality oxygen-free copper, the Orbek heat exchanger delivers superior heat transfer and corrosion resistance. It can adjust between three heating modes to meet seasonal hot water needs, saving energy costs for you Compact Design: With a compact size of 20.5"H x 13.0"L x 7.0"W, gas tankless water heater indoor saves over 50% of space compared to traditional tank water heaters, fitting easily into most corners of your home Stable Temperature Control: The built-in chip adjusts heating power 20,000 times per second, keeping water temperature stable within 1°F for a comfortable shower experience LED Digital Display: The Orbek natural gas tankless water heater indoor features a clear screen for sensitive temperature adjustments between 95°F and 149°F. The power outage memory function ensures you won't have to reset the temperature repeatedly Water Pressure Range: The Orbek tankless water heater natural gas indoor is equipped with low water pressure start technology, allowing it to operate at water pressures ranging from 15 to 150 PSI, even in remote homes far from city centers. Additionally, the operational noise is very low, ensuring it will not disturb your family Easy to Install: Fits standard 3" OD vents, 3/4" NPT fitting size, and 120V AC. Suitable for most homes. Vents and water valve kit not included but we are also selling this. Recommended to be installed by a professional for better performance and safety