Ranein Gen II RV Tankless Water Heater 65,000 BTU — 12V Propane, Thermostatic Mixing, High-Output Flow

The Ranein Gen II RV Tankless Water Heater delivers on-demand propane hot water at up to 65,000 BTU with thermostatic mixing for steady temperatures and family-sized flow.

Designed for RV owners who want tankless performance without complicated installs, this 12V-powered unit fits standard RV cutouts and replaces many Suburban & Atwood tank heaters. Its high-output burner and oxygen-free copper heat exchanger produce faster heating and better flow—up to about 3.9 GPM—so multiple fixtures can run together without big temperature swings. Built-in safety, anti-freeze protection, a top-mounted exhaust fan, and CSA approval make it suitable for long trips, cold climates, and higher altitudes.

How quickly will this unit heat water for showers and faucets?

The Gen II’s 65,000 BTU burner rapidly raises water temperature, minimizing wait time at the tap and sustaining heat during continuous use. Staged combustion and a thermostatic mixing chamber reduce temperature fluctuation when demand changes.

• High-output 65,000 BTU burner for faster heat-up
• Approximate maximum flow up to 3.9 GPM for longer showers
• Thermostatic mixing keeps outlet temperatures stable

Will it work for multiple users at the same time?

Yes—this model is engineered for simultaneous use. The combination of higher BTU, stronger flow rate, and the thermostatic mixing chamber allows two or more fixtures to draw hot water without severe temperature drops.

• Supports simultaneous faucets and shower use with minimal drop-off
• Precision temperature control between 95°F and 124°F
• Staged combustion reduces overheating and improves efficiency

What safety and cold-weather features are included?

Safety is built in with flame-failure protection, automatic gas shut-off, and a pressure relief valve. An integrated anti-freeze function activates below 42.8°F to guard internal components during freezing conditions.

• Top-mounted exhaust fan for stable combustion and venting
• Automatic gas shut-off on flame failure and CSA certification
• Anti-freeze activation below 42.8°F to prevent freeze damage

How easy is installation and what RVs is it compatible with?

The Gen II is built to fit standard RV heater cutouts and can replace many 6/10/12-gallon tank models using a 12.8" × 12.8" opening. Exterior doors are not included; optional Ranein door kits are available in common sizes.

• Fits standard RV openings; replaces many Suburban & Atwood tank heaters
• 12V DC powered to integrate with typical RV electrical systems
• Optional exterior door kits sold separately in 15"×15", 15"×18", 18"×18" sizes

Who is this for: The Ranein Gen II is aimed at full-time RVers, families, and travelers who need reliable, on-demand hot water with strong flow—especially those who camp in cold climates or at higher elevations. If you want tankless performance, faster heat-up, and the ability to run multiple fixtures together, this heater provides an RV-ready, CSA-approved solution with safety and anti-freeze protection built in. Installers and DIY RV owners will appreciate the standard cutout compatibility and 12V operation, while anyone replacing a conventional tank unit will see immediate gains in flow, runtime, and temperature stability.