Eccotemp Builder Series Indoor 6.8 GPM Natural Gas Tankless Water Heater - 1779607499130_634

Eccotemp Builder Series Indoor 6.8 GPM Natural Gas Tankless Water Heater - 1779607499130_634

The Eccotemp 6.8GB Indoor Natural Gas Tankless Water Heater is one of the most advanced CSA approved outdoor models of the Eccotemp tankless line. Rated at an impressive 6.8 GPM with a temperature rise of 38 degrees and 140,000 BTU per hour, the Eccotemp 6.8GB-ING can meet all your hot-water needs! Eccotemp’s advanced 0.7 GPM low flow ignition technology allows users to enjoy endless hot water without experiencing cold spots. 

We recommend the Eccotemp 6.8GB-ING for standard size single family homes, apartments, condos, cabins, as well as smaller commercial applications. Using 3-4 hot water applications simultaneously is a breeze with the Eccotemp 6.8GB-ING. With our upgraded PCB (Product Control Board) performance and an all new gas modulating valve, consumers can experience best in class temperature performance with a price anyone can afford. 

The compact, wall mounted Eccotemp 6.8GB-ING has a 110/120-volt UL listed power cord that powers the internal Exhaust Fan, Anti-Freeze Protection, Digital Display and PCB. With its fully automated control system, the Eccotemp 6.8GB-ING only pulls about 12 amps during operation, making it an ideal for low energy consumption and efficiency.  

The Eccotemp 6.8GB has been CSA tested and approved for US & Canadian use at elevations up to 2000 feet. Installation and use of the Eccotemp 6.8GB above 2000 feet may affect overall product efficiency and performance.

All purchases valued at $75 or above will be shipped with SIGNATURE REQUIRED. If you wish to remove the SIGNATURE REQUIRED please contact Customer Service. Please Note: By opting out of SIGNATURE REQUIRED, you release Eccotemp from all liability for lost or stolen packages. Call 1-866-356-1992 or chat with us to speak with a customer service agent.   

Features                    

• Rated for 3-4 applications used simultaneously means that taking a shower and running two sinks at the same time is effortless. The Eccotemp 6.8GB is ideal for normal hot water heating applications in ANY size residential single-family home, condo, cabin, apartment or Light commercial use. 

• Rated at 6.8 GPM at 140,000 BTUs with a temperature rise of 38 degrees, this ultra-efficient tankless water heater is ideal for just about every single-family home 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 with an Energy Factor Rating of .83 

• 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. 

• Comes with a 10-year warranty on the heat exchanger, 5 years on components, and 30 days on parts/accessories. Live chat and self-help guides are available for support. 

• What's Included: 6.8GB-ING tankless water heater, mounting hardware, gas appliance shut off valve and installation manual. 

• The Eccotemp 6.8GB 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. 

What our Experts Think  

Q&A 

Q: What is this Eccotemp 6.8 GPM indoor unit?
A: It is a wall-mounted indoor natural gas tankless water heater designed for whole-home use, delivering continuous hot water on demand for multiple fixtures at once.

Q: What does 6.8 GPM mean?
A: It means the unit can supply up to 6.8 gallons per minute of hot water, supporting about 3–4 simultaneous uses like showers, sinks, and appliances.

Q: What is its heating power?
A: It is rated at up to 140,000 BTU, providing strong performance for small to medium-sized homes and light commercial use.

Q: Is it suitable for indoor installation?
A: Yes. It is designed for indoor wall mounting with proper venting, using an exhaust fan and electronic control system for safe operation.

Q: What type of homes is it best for?
A: It is ideal for single-family homes, apartments, condos, cabins, and small commercial spaces needing continuous hot water supply.

Q: What are the key efficiency features?
A: It uses modulating gas control, low-flow ignition technology, and temperature sensors to maintain stable water temperature and reduce energy waste.

Q: Does it support multiple simultaneous uses?
A: Yes, it can typically handle 3–4 hot water outlets at the same time under normal household conditions.

Q: What should buyers know before installation?
A: It requires professional installation, proper gas line sizing, and correct venting, and is not compatible with hydronic or floor heating systems.

                 
Maintenance Tips  

• Descale every 6–12 months (more often in hard water areas) to prevent mineral buildup and maintain full 6.8 GPM performance
• Clean inlet water filter regularly to avoid low-flow shutdowns and ignition errors
• Inspect indoor venting system (4” stainless vent) for blockages, leaks, or condensation buildup to ensure safe exhaust flow
• Check gas line & water connections periodically for leaks, pressure drops, or corrosion
• Keep set temperature around 120°F to reduce scaling and extend heat exchanger life
• Flush system before peak seasons (winter/high usage) for stable hot-water delivery
• Verify proper airflow & clearances around unit to prevent overheating or error codes
• Test ignition and error codes occasionally to catch early performance issues
• Use manufacturer-approved flush kit (or equivalent descaling solution) for safe maintenance
• Schedule annual professional inspection for burner, sensors, and gas calibration