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Enjoy fast and free shipping on all orders over $89! Contact us (855) 424-4376
The Eccotemp Builder Series 6 GPM Indoor Natural Gas Tankless Water Heater (6GB-ING) is CSA approved and rated at an impressive 6 GPM with a temperature rise of 45 degrees. This tankless water heater is rated at 145,000 BTU and can produce unlimited hot water for 2-3 applications simultaneously. Eccotemp’s advanced 0.53 GPM low flow ignition technology allows users to enjoy endless hot water without experiencing cold spots.

We recommend the 6 GPM Indoor Natural Gas Tankless Water Heater (6GB-ING) for standard to smaller size single family homes, townhomes, condos, cabins, as well as smaller commercial applications and home builders. With our upgraded product control board performance and an all-new gas modulating valve, consumers can experience best in class temperature performance that is budget friendly.

The space saving wall mounted Eccotemp 6GB-ING has a 110/120-volt UL listed power cord that powers the internal exhaust fan, anti-Freeze protection and product control board. With its fully automated control system, the Eccotemp 6GB-ING pulls less than 0.34 amps during operation, making it ideal for low energy consumption and efficiency.

The Eccotemp 6GB-ING has been CSA tested and approved for US & Canadian use at elevations up to 2000 feet. Installation and use of the Eccotemp 6GB-ING above 2000 feet may affect overall product efficiency and performance. Installation and use of the Eccotemp 6GB-ING above 5000 feet is not recommended.

  • Rated for 2-3 applications means enjoying on-demand hot showers for up to 2 bathrooms simultaneously
  • Rated at 6 GPM (gallons per minute) at 145,000 BTUs with a temperature rise of 45 degrees, this ultra-efficient Builder Series tankless hot water heater is ideal for just about every size single-family home, townhome, condo, cabin, apartment, or light commercial use in the US and Canada
  • CSA certified for installation in the US and Canada. This tankless water heater meets and exceeds all safety and efficiency requirements according to the DOE
  • Advanced Generation 3 Computer board with high performance processing and smart adjust technology built in. Our proprietary developed programming meets and exceeds today’s consumer demands
  • With advanced incoming and outgoing water temperature sensor technology, you always have total confidence when it comes to safety
  • The 6GB Builder Series is designed for indoor installation only and requires 3-inch venting. Make installation a breeze using the Eccotemp 3" Horizontal Vent Kit or 3” Vertical Vent Kit (purchased separately).
  • 10-Year limited manufacturer warranty (heat element: 10-years, Parts: five years), live chat, appointments for product support, and self-help guides will give you peace of mind that the Eccotemp 6GB-ING will keep you in hot water for years
  • What's Included: Eccotemp 6 GPM Indoor Natural Gas Tankless Water Heater (6GB-ING), mounting hardware, gas appliance shut off valve, and product manual
  • The Eccotemp 6GB-ING 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


  • Flow Rate: 6.0 GPM
  • Power Type: Natural Gas (NG)
  • Installation: Indoor
  • Color: White
  • Applications:
    • Cabin
    • Apartment/Condo/Townhome
    • Whole Home
    • Office
    • Mid-Size Home
    • Tiny Home
  • Map Zone:
    • Southern Region
    • Mid Region
    • Northern Region
  • Dimension: 18.70" x 31.10" x 10.00"

    Applications Cabin, Apartment/Condo/Townhome, Whole Home, Mid-Size Home, Office, Tiny Home
    Map Zone Northern Region, Mid Region, Southern Region
    Color White
    Flow Rate 6.0 GPM
    Installation Indoor
    Power Type Natural Gas (NG)

    18.70" x 31.10" x 10.00"

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