Endless Hot Water – Advanced deep fire row design maximizes heating efficiency, delivering up to 3.9 GPM at 65,000 BTU. Enjoy continuous hot water even in snowy winter. Easy Replacement – Easy to replace most RV water heaters (including Suburban & Atwood 6/10/12-gallon models) with a 12.8" x 12.8" opening (door not included). Compatible door kits (15" x 15", 15" x 18", or 18" x 18") are available for separate purchase. Enhanced for Your Convenience - Building on the original design, we’ve upgraded the multi-function remote control to display real-time gas usage, voltage, water flow rate (GPM), anti-freeze activation status, and support operation at high altitudes up to 9,800 feet. Thermostatic Chamber – Ensures consistent water temperature by automatically adjusting heat output, eliminating sudden fluctuations for a comfortable shower experience. Safe & Reliable – Features a top-mounted exhaust fan for stable combustion, automatic gas shut-off if flames fail, and an anti-freeze system that activates below 42.8°F to prevent damage. CSA-certified for safety. Includes a built-in pressure relief valve (no separate purchase needed) Ideal for - Full-time RVers needing reliable hot water, Campers who enjoy extended showers and Cold climate travelers needing freeze protection.