Eccotemp Builder Series 6.0 GPM Indoor Natural Gas Tankless Water Heater - Final Sale - 1779607545006_125

Eccotemp Builder Series 6.0 GPM Indoor Natural Gas Tankless Water Heater - Final Sale - 1779607545006_125

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.

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 of lost or stolen packages. Call 1-866-356-1992 or chat with us to speak with a customer service agent.

Features                    

• 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).
• Limited Manufacturer Warranty (Heat Exchanger: 10 Years, Components: 5 Years, Parts/Accessories: 30 Days), live chat, and self-help guides provide peace of mind, assuring that the Eccotemp 6GB-ING will keep you in hot water for years
• 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

What our Experts Think

• Size it realistically (don’t overestimate GPM): 6.0 GPM is ideal for 1 bathroom + kitchen use, or 2 low-demand fixtures. Expect reduced performance in cold inlet water conditions.
• Cold water impact matters a lot: In colder climates, real output can drop significantly. If incoming water is cold, assume closer to 4–5 GPM usable performance.
• Gas supply is critical: Requires stable natural gas pressure and correct line sizing. Undersized gas lines = temperature drops, ignition issues, or shutdowns.
• Venting quality = system stability: Poor or incorrectly sized venting causes error codes, flame instability, and efficiency loss. Always treat venting as a performance factor, not just installation.
• Best usage pattern: Works best when hot water demand is staggered (not simultaneous)—e.g., shower first, then kitchen sink.
• Avoid peak overload: Running multiple showers + appliances will trigger temperature swings or flow limitation mode.
• Final sale reality check: Treat it as non-returnable value pricing—inspect all accessories, manuals, and fittings before installation.
• Maintenance matters early: First 6–12 months are key—clean inlet filter, check scale buildup if water is hard, and ensure consistent gas combustion.
• Water hardness warning: If your water is hard, consider a basic descaling routine or softener, otherwise efficiency drops over time.
• Ideal buyer profile: Best for budget-focused homeowners, rental units, or small families who want reliable hot water without paying for smart features or high-flow models.

Q&A

Q: What is this Eccotemp 6.0 GPM indoor unit?
A: It is a compact indoor natural gas tankless water heater designed for small to medium homes, delivering continuous on-demand hot water for multiple fixtures without a storage tank.

Q: What does 6.0 GPM mean?
A: It provides up to 6 gallons of hot water per minute, supporting about 2–3 simultaneous uses such as showers and sinks under normal conditions.

Q: What is its heating capacity?
A: It is rated at up to 145,000 BTU, allowing steady hot water output for everyday household demand.

Q: What makes the “Final Sale” version different?
A: It may include minor cosmetic defects or missing accessories, but is fully functional and typically includes a manufacturer warranty, while being non-returnable.

Q: How many fixtures can it support?
A: It can typically handle 2–3 applications simultaneously, such as two bathrooms and a kitchen sink (depending on flow conditions).

Q: Is it suitable for indoor installation?
A: Yes. It is designed for indoor wall mounting with 3-inch venting, requiring proper exhaust setup for safe operation.

Q: What type of homes is it best for?
A: It is ideal for small to mid-sized homes, townhomes, condos, cabins, apartments, and light commercial use.

Maintenance Tips

• Descale every 6–12 months to prevent mineral buildup and maintain steady 6.0 GPM performance
• Clean inlet water filter regularly to avoid low-flow shutdowns and ignition issues
• Inspect indoor venting system (4” exhaust) for blockages, leaks, or condensation for safe operation
• Check gas line & water connections for leaks, corrosion, or pressure inconsistencies
• Keep temperature around 120°F to reduce scaling and improve efficiency
• Flush before peak usage seasons to ensure consistent hot-water delivery
• Ensure proper clearance & airflow indoors to prevent overheating or error codes
• Test ignition and error codes occasionally for early detection of faults
• Use manufacturer-approved descaling solution for safe heat exchanger maintenance
• Schedule annual professional inspection for burner, sensors, and gas calibration