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Eccotemp SH12-A-NG SmartHome Indoor 4.0 GPM Natural Gas Tankless Water Heater


Heating water smarter with the Eccotemp Smart Home Indoor 4.0 GPM Natural Gas Tankless Water Heater! Leveraging the latest in technological innovation, this water heater not only ensures an uninterrupted flow of hot water but also optimizes your space and energy usage for a smarter, more efficient home.

Say goodbye to running out of hot water during peak usage times or adjusting water temperature manually. This Smart Home Tankless Water Heater is equipped with Wi-Fi connectivity, allowing you to control and monitor your water heater remotely using your smartphone or pair with Amazon Alexa and Google Home to access voice commands. Set customized schedules, adjust temperature settings, view real consumption statistics, and receive maintenance alerts with ease, giving you full control over your hot water supply from anywhere, anytime.

Featuring a powerful flow rate of 4.0 gallons per minute (GPM), this tankless water heater is perfect for small to medium-sized households, providing a continuous and uninterrupted supply of hot water for all your needs. Enjoy long showers, efficient dishwashing, and other hot water demands without any interruptions, making your daily routines more convenient and enjoyable.

This Tankless Water Heater is not just smart, but also energy efficient. Its advanced heating technology only heats water as it's needed, eliminating the standby heat loss that occurs with traditional tank-based water heaters. This results in significant energy savings, reducing your utility bills and lowering your environmental footprint.

Installation is simple and hassle-free, making it a great option for any home. Its compact and sleek design allows for easy installation in tight spaces, saving valuable floor space in your home.

Upgrade to a smarter and more efficient water heating solution without breaking the bank. This budget-friendly tankless water heater delivers functionality and performance by providing the convenience of smart controls, an endless hot water supply, and energy-efficient operation. Start experiencing the ultimate in comfort and convenience today!

The Eccotemp SH12-A Series has been CSA tested and approved for US & Canada at elevations up to 2000 feet. Installation and use above 2000 feet may affect overall product efficiency and performance.


  • Temperature range of 95-140 degrees Fahrenheit and rated for 1-2 applications.
  • Rated at 4.0 GPM (gallons per minute) at 80,00 BTUs with a temperature rise of 35 degrees, this ultra-efficient tankless hot water heater is ideal for smaller single-family homes, townhomes, condos, cabins, apartments, or light commercial use.
  • Enjoy real-time control over your home's water heating needs. Use the Eccotemp mobile app to track energy consumption, adjust temperatures, set schedules, or even detect product and network errors. Unlock substantial savings with our Eco Mode feature, a smart solution that can help you reduce energy consumption by up to 25%. If your incoming water is set at a higher temperature than needed, simply use your phone to adjust the settings, aiding in lower utility usage, such as gas.
  • Experience the convenience of our versatile smart app settings that display your desired currency (USD/CAD), dual-mode Fahrenheit and Celsius temperature readings, and preferred gas measurement unit, offering a personalized understanding of your usage.
  • Seamlessly connect with Amazon Alexa or Google Home for voice command functions like: "Alexa, set my water heater to 110 degrees" or "Hey Google, switch off my water heater."
  • Smart Power Button feature turns your model on or off, detects error codes, connects to wireless networks, and enables sleep mode to prevent unnecessary energy use - all with a simple touch.
  • The S12-A Series can be complemented with our patented, one-of-a-kind EZ-Flush Descaling Kit to ensure your tankless water heater is running at maximum efficiency all year long.
  • Easy wall mounting and installation with 120-Volt UL listed power cord and ½-inch NPT water and gas connections.
  • Indoor venting is available in 3-inch horizontal and vertical installation kits (sold separately).
  • CSA certified for installation in the US and Canada.
  • Limited Manufacturer Warranty (Heat Exchanger: 5 Years, Components: 2 Years, Parts/Accessories: 30 Days), live chat, appointments for product support, and self-help guides provide peace of mind, assuring that the Eccotemp SH12-A Series will keep you in hot water for years.
  • What's Included: Smart Home 4.0 GPM Indoor Natural Gas Tankless Water Heater (SH-12-A-NG), 1 x Gas Appliance Shut-Off Valve, 1 x Temperature & Pressure Relief Valve (Included in Canadian shipments only), 1 x Wireless Temperature Remote Control, 1 x Hardware Pack, 1 x Product Manual.
    • Mid Size Home
    • Town Home
    • Apartment
    • Office
    • Tiny Home
    • Cabins


    • Voice Commands
    • Easy Install
    • SmartHome
    • Glass Panel
    • Smart App
    • Smart Button
    • Energy Efficient
    • Wireless Remote
    • Statistics
    • Compact Size
    • Control Board
    • Eco Mode
    • Scheduler
    • Timer
    • Error Monitoring
    • Easy Installation: Experience a hassle-free set-up process with the Eccotemp Smart Home 4.0 GPM Indoor Gas Tankless Water Heater. When paired with our 3-Inch Stainless Steel Vent kit, both vertical and horizontal installations are straightforward and efficient.Top Image Eccotemp Tankless Water Heater
    • Smart Revolution: First patented all-in-one smart home water heater. The complexities & expenses of integrating traditional heaters become a thing of the past. This system comes built-in, simplifying your home's water heating needs into one streamlined, smart device.Middle Image Eccotemp Tankless Water Heater
    • Innovative Activation: This model is equipped with an advanced Smart Power Button that simplifies operations. With a single touch, it turns your device on & off, detects error codes, connects to wireless networks, & activates sleep mode to prevent unnecessary energy use.Bottom Image Eccotemp Tankless Water Heater


    • Rated Flow Rate: 4.0GPM
    • Gas: Natural Gas
    • Amps: 0.34 Amps
    • Installation: Indoor
    • Color: White
    • Model: SH12-A-NG
    • BTU: 80,000
    • Power Type: AC
    • Temperature Range: 95°-140°F
    • Water Connection: 1/2" NPT
    • Gas Connection: 1/2" NPT
    • Warranty: 2 Years 
    • Weight: 25.4 lbs
    • Product Dims: 20.5"x13"x6.5"
    • Packaging Dims: 27.5"x15.5"x8.75"

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