Eccotemp Builder Series 6.0 GPM Indoor Liquid Propane Tankless Water Heater - Final Sale - 1779607539053_941
This model may exhibit minor cosmetic imperfections. It may not include all accessories, such as hardware packs and manuals. Final sale items include original manufacturer warranty but are non-returnable.
The Eccotemp Builder Series 6 GPM Indoor Liquid Propane Tankless Water Heater (6GB-ILP) 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 Liquid Propane Tankless Water Heater (6GB-ILP) 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-ILP 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-ILP pulls less than 0.34 amps during operation, making it ideal for low energy consumption and efficiency.
The Eccotemp 6GB-ILP has been CSA tested and approved for US & Canadian use at elevations up to 2000 feet. Installation and use of the Eccotemp 6GB-ILP 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).
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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-ILP 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
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Budget whole-home tankless unit (LP version): The Eccotemp Builder Series 6.0 GPM Indoor Liquid Propane Tankless Water Heater (Final Sale, SKU: 1779607539053_941) is a wall-mounted indoor system designed for continuous on-demand hot water in small to mid-size homes.
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Strong baseline performance (6.0 GPM / 145,000 BTU class): Supports 2–3 simultaneous hot water uses such as showers and sinks under standard conditions, making it suitable for typical single-family homes or townhomes.
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Stable modulation system: Uses a gas modulating valve and control board to adjust output based on demand, helping maintain more consistent temperature during usage changes.
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Efficiency-focused operation: Low electrical draw (~0.34A class operation) and on-demand heating reduce standby losses compared to tank systems.
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Final sale value positioning: Typically sold at a significant discount (~lower tier pricing vs standard units), but may include cosmetic imperfections or missing accessories and is non-returnable.
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Indoor install requirement: Requires 3-inch venting and correct gas/water sizing, making professional installation important for stable performance.
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Trade-off: limited capacity ceiling: At 6.0 GPM, performance can drop noticeably in colder inlet water conditions or when multiple fixtures run at once.
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Trade-off: installation sensitivity: Gas pressure, venting, and water flow must be correctly configured—this category is sensitive to setup quality.
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Trade-off: final sale risk: Non-returnable condition means buyers must accept possible cosmetic wear or incomplete packaging.
Q&A
Q: What is this Eccotemp 6.0 GPM Final Sale unit?
A: It is a wall-mounted indoor liquid propane tankless water heater designed for small to medium homes, delivering continuous on-demand hot water without a storage tank.
Q: What does 6.0 GPM mean?
A: It can supply up to 6 gallons of hot water per minute, supporting about 2–3 simultaneous uses like showers and sinks under normal household conditions.
Q: What is its heating capacity?
A: It is rated at up to 145,000 BTU, allowing stable performance for typical residential hot water demand.
Q: What does “Final Sale” mean?
A: It means the unit is non-returnable, and may include minor cosmetic imperfections or missing accessories, but it is still fully functional and covered by manufacturer warranty.
Q: What homes is it best for?
A: It is suitable for single-family homes, townhomes, condos, cabins, apartments, and light commercial use, especially where moderate hot water demand is needed.
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: How many fixtures can it support?
A: Typically 2–3 applications at the same time, depending on flow rate and incoming water temperature
Maintenance Tips
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Descale every 6–12 months to prevent mineral buildup and maintain steady hot-water flow
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Clean inlet water filter regularly to avoid low-flow shutdowns and ignition issues
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Inspect indoor venting (4” exhaust system) for blockages, leaks, or condensation buildup for safe operation
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Check propane line & regulator for leaks, corrosion, and stable gas pressure
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Keep temperature around 120°F to reduce scaling and improve efficiency
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Flush system before peak usage seasons for consistent performance under demand
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Ensure proper indoor clearance & airflow to prevent overheating or error codes
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Monitor ignition system & error codes periodically for early fault detection
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Use manufacturer-approved descaling solution or kit to protect heat exchanger lifespan
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Annual professional inspection recommended for burner, gas calibration, and safety systems
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