Upgraded Remote with Real-Time Monitoring: Track Gas Usage, Voltage & Flow Rate (GPM) — Optimize Energy Efficiency on Long RV Trips. Instant Hot Water On Demand: Tankless Design Heats Water in Seconds — No Preheating Wait & Saves 30% Gas by Only Running When Needed. 65,000 BTU Powerful Heating: Reliable Hot Water in Freezing Winters — Efficiently Supports Snowy Camping & Back-to-Back RV Showers. Fits All RVs: Direct Replacement for Suburban/Atwood 6/10/12 Gallon Heaters — Choose 15"x15", 15"x18", or 18"x18" Doors (Sold Separately). Precision Temperature Control: Built-In Stable Chamber + Smart Combustion — Maintains 95°F-124°F Water Without Overheating or Gas Waste. High/Low Altitude Mode Switch: Manual Adjustment for Optimal Performance on Mountain Roads or Coastal Highways. CSA Safety + Lifetime Support: Auto Freeze Protection & 12V Compatibility — Includes 6.6ft Remote & 24/7 Professional Assistance. RA65LH