EccoTemp Builder Series 6.5 GPM Indoor Natural Gas Tankless Water Heater

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The Eccotemp 6.5 GPM Indoor Natural Gas Tankless Water Heater (6.5GB-ING) is the second largest capacity model in the Builder Series. CSA approved and rated at an impressive 6.5 GPM with a temperature rise of 45 degrees. This tankless water heater is rated at 170,000 BTU and can produce unlimited hot water for 3-4 applications simultaneously. Eccotemp’s advanced 0.66 GPM low flow ignition technology allows users to enjoy endless hot water without experiencing cold spots.

We recommend the 6.5 GPM Indoor Natural Gas Tankless Water Heater (6.5GB-ING) for large, medium, and small 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 6.5GB-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 6.5GB-ING pulls less than 0.6 amps during operation, making it ideal for low energy consumption and efficiency.

The Eccotemp 6.5GB-ING has been CSA tested and approved for US & Canadian use at elevations up to 2000 feet. Installation and use of the Eccotemp 6.5GB-ING above 2000 feet may affect overall product efficiency and performance. Installation and use of the Eccotemp 6.5GB-ING above 5000 feet is not recommended.


  • Rated for 3-4 applications means enjoying on-demand hot showers for up to 3 bathrooms simultaneously
  • Rated at 6.5 GPM (gallons per minute) at 170,000 BTUs with a temperature rise of 45 degrees, this ultra-efficient tankless hot water heater is the second largest capacity model in the Eccotemp Builder Series and 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 6.5GB 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 6.5GB-ING will keep you in hot water for years
  • What's Included: Eccotemp 6.5 GPM Indoor Natural Gas Tankless Water Heater (6.5GB-ING), mounting hardware, gas appliance shut off valve, and product manual
  • The Eccotemp 6.5GB-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.
  • Applications Townhome, Condo, Cabin, Apartment, Whole Home, Mid-Size Home, Office
    Map Zone Northern Region, Mid Region, Southern Region
    Color White
    Flow Rate 6.5 GPM
    Installation Indoor
    Power Type Natural Gas (NG)
    Dimensions 20.90" x 31.10" x 10.00"
    GTIN: 851293008835
    SKU: 6.5GB-ING

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