Rheem 180,000 BTU Indoor High-Efficency Condensing Direct Vent Natural Gas Tankless Water Heater Model RTGH-90DVLN-3
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PVC Vent runs up to 60' (2"), 150' (3")
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The enhanced design is up to 20% smaller and lighter-making one-person installs even easier
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Industry Best! 1/2" side-to-side clearance allows you to work in spaces the safely competition can't 1/2" Gas line compatibility up to 24 ft (subject to local code)
Features
Rheem Exclusive! Hot-start Programming ensures the unit is in a ready state between back-to-back usage, minimizing any cold water bursts
Built-in EcoNet Wi-Fi technology for direct control from your device (on select models)
LeakGuard – All-inclusive leak detection and prevention system that detects any leak that comes from the unit (on indoor Wi-Fi models)
What Our Experts Think
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Continuous Hot Water on Demand: Tankless design delivers endless hot water without a storage tank, ideal for homes with multiple bathrooms or high usage
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High-Efficiency Condensing: Condensing heat exchanger maximizes energy use, reduces wasted heat, and lowers operating costs
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180,000 BTU Natural Gas Power: Robust heating capacity supports simultaneous showers, laundry, and appliance use
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Indoor Direct Vent Design: Sealed combustion and direct venting improve safety and combustion efficiency
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Reliable Rheem Performance: Built with durable components and smart controls for consistent daily operation
Q&A
Q: What fuel does this water heater use?
A: Natural Gas (NG)
Q: Does it provide endless hot water?
A: Yes — continuous on-demand hot water without a storage tank
Q: Where is this unit installed?
A: Indoor with direct venting
Q: Who is this model best for?
A: Homes with moderate to high hot water demand, especially with multiple simultaneous uses
Maintenance Tips
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Annual Flushing: Flush the system yearly to reduce mineral buildup and maintain flow efficiency
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Clean Inlet Filter: Regularly clean the water inlet filter to sustain peak performance
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Inspect Venting & Air Intake: Keep vent and intake pathways clear of debris
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Check Gas Connections: Ensure natural gas lines and fittings are secure and leak-free
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Professional Inspection: Have a qualified technician inspect burners, heat exchanger, and controls annually for safe, efficient operation
Damage 
Loss 
Theft 
