Meet the Rinnai 6.6 GPM Indoor 160k BTU Non-Condensing Tankless Water Heater (351-RE160IN). This compact, on-demand heater is built for busy homes that want reliable hot water, energy savings, and modern control from your phone.

Key Features & Design

• Never run out of hot water— reliable flow from 0.26 to 6.6 GPM, perfect for daily family needs.
• Max output 160,000 BTUs for fast, consistent hot water even during peak usage.
• Indoor, compact design — no bulky tank needed and it’s the size of a small suitcase, freeing up space for storage or upgrades.
• Uniform Energy Factor (UEF) 0.81, heats only when needed to help you save on energy bills year-round.
• Smart connectivity — control your hot water from your phone with the Control-R® module; monitor usage, manage temperature, and schedule recirculation remotely.
• Temperature range keeps water between 98°F and 140°F for showers, dishwashing, and everything in between.
• Pressure tolerance— handles 20–150 PSI for strong, steady water flow.
• Whisper-quiet operation— runs in the background without disturbing your peace and quiet.
• Smart venting options with single wall penetration simplify installation and keep your home sealed efficiently.
• Eco-conscious design — meets South Coast AQMD 14 ng/J and 20 ppm NOx standards.
• Warranty — 15-year heat exchanger, 5-year parts, and 1-year labor for long-term peace of mind.

Shipping and support: Free USA shipping. Your Rinnai 6.6 GPM Indoor Tankless Water Heater will be packed and shipped within 1–3 business days and delivered to you between 5–10 business days.