Natural Gas Tankless Water Heater Indoor, 3.6 GPM 85,000 BTU,Instant Hot Water, Constant Temperature,Pure Copper Heat Exchanger, On-Demand for 2–3 Fixtures, Apartment & Home Use

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As of 2026-04-01 01:42:37 UTC (more info)

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Product Features

INSTANT HOT WATER FOR SMALL HOMES:This indoor natural gas tankless water heater delivers up to 3.6 GPM flow rate and 85,000 BTU heating capacity, providing endless hot water on demand for 2–3 fixtures simultaneously, ideal for small houses, cabins, and apartments.

INTELLIGENT CONSTANT TEMPERATURE PLUS:Equipped with Intelligent Constant Temperature PLUS technology, this natural gas tankless water heater steplessly adjusts the air-fuel ratio to maintain stable water temperature within ±1?, even when another water outlet is suddenly turned on, reducing temperature fluctuations and scalding risk.

4-STAGE ENERGY-SAVING COMBUSTION TECHNOLOGY:The advanced 4-stage staged combustion system operates with a minimum heat load of just 8,500 BTU, delivering comfortable hot water in summer without mixing cold water and sufficient heating output in winter, while improving overall energy efficiency.

HIGH-EFFICIENCY PURE COPPER HEAT EXCHANGER:Built with a 100% pure copper heat exchanger, this natural gas tankless water heater achieves up to 95% thermal efficiency, provides hot water within seconds, minimizes heat loss, and ensures reliable, long-lasting performance.The compact 21.3?×13.7?×6.8?wall-mounted design supports standard 3/4? NPT water and gas connections, 3?vent, and a UL-approved 120V power supply for easy installation.

MULTIPLE SAFETY & ANTI-FREEZE PROTECTIONS, EASY INSTALLATION:Designed for indoor use, this unit includes overheat protection, anti-dry combustion, low water pressure start, anti-scald protection, flame failure protection, dual gas solenoid valves, and automatic anti-freeze protection below 39°F (4°C).