EccoTemp i12 Tankless Water Heater

$589.00 $449.00


  • One of the most advanced indoor models of the Eccotemp tankless line.
  • An impressive 4.0 GPM with a temperature rise of 38 degrees and 80,000 BTU per hour
  • Has advanced 0.7 GPM low flow ignition technology allows users to enjoy endless hot water without experiencing cold spots.
  • Available in LP (liquid propane) and Eccotemp i12-NG (natural gas)
  • Ideal for tiny and micro and/or compact homes, apartments, condos, cabins even small commercial applications.
  • 1-2 hot water applications simultaneously is a very manageable for  Eccotemp i12.
  • Has an upgraded PCB (Product Control Board)
  • It is a compact wall-mounted unit  with  a 110/120-volt UL listed power cord that powers the internal Exhaust Fan, Digital Display and PCB.
  • It has a  fully automated control system and it  only pulls about 0.5 amps during operation, making it an ideal for low energy consumption and efficiency.
  • Rated at 4.0 GPM at 80,000 BTUs with a temperature rise of 38 degrees, this ultra-efficient tankless water heater is ideal for just about every single-family home
  • It performs well at elevations up to 2000 feet. It performs poorly at elevations of 5000 feet and above.
IMPORTANT NOTE: Cannot be used for HYDRONIC SYSTEMS, RECIRCULATING, or FLOOR HEATING.  
Surprise! Use this code for a 5% discount on all EccoTemp Product Orders. Code: HOORAY5
Fuel: Liquid Propane (LP)
Vendors: Eccotemp SKU: i12-LP
  • 5
    373 (88.2%)
  • 4
    34 (8%)
  • 3
    11 (2.6%)
  • 2
    2 (0.5%)
  • 1
    3 (0.7%)
96% of customers rate this company 4- or 5-stars
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Deb Verified Customer
06-24-25

Process was easy, no problems.

Michael K. Verified Customer
06-20-25

Good product and delivered quickly

Thomas H. Verified Customer
06-13-25

From the initial contact through receiving the order they responded quickly and accurately to all questions. Product, Pricing and Shipping time was very good. Very Good experience.

Benjamin T. Verified Customer
06-02-25

Sweet, awesome, good and nice!!

Katie I. Verified Customer
05-18-25

Great shopping experience, best price for this product (Poly Whey) on the internet when you include shipping. The product came well wrapped and is absolutely amazing. So easy to use, so beautiful and I am just thrilled to be able to create a finished product without toxic ingredients.

Christine B. Verified Customer
02-17-25

Patient staff with returns and repurchases.

Tessa P. Verified Customer
02-15-25

Great helpful sales partner

Sonia S. Verified Customer
02-15-25

Only problem is I couldn’t see a colour. Sample for dark roast medium roast or espresso and that’s in the range I needed so it would’ve been nice to have seen it.

John D. Verified Customer
02-11-25

Josh in flooring was very helpful.

Jeanine S. Verified Customer
02-11-25

you carry a hard find product

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  • One of the most advanced indoor models of the Eccotemp tankless line.
  • An impressive 4.0 GPM with a temperature rise of 38 degrees and 80,000 BTU per hour
  • Has advanced 0.7 GPM low flow ignition technology allows users to enjoy endless hot water without experiencing cold spots.
  • Available in LP (liquid propane) and Eccotemp i12-NG (natural gas)
  • Ideal for tiny and micro and/or compact homes, apartments, condos, cabins even small commercial applications.
  • 1-2 hot water applications simultaneously is a very manageable for  Eccotemp i12.
  • Has an upgraded PCB (Product Control Board)
  • It is a compact wall-mounted unit  with  a 110/120-volt UL listed power cord that powers the internal Exhaust Fan, Digital Display and PCB.
  • It has a  fully automated control system and it  only pulls about 0.5 amps during operation, making it an ideal for low energy consumption and efficiency.
  • Rated at 4.0 GPM at 80,000 BTUs with a temperature rise of 38 degrees, this ultra-efficient tankless water heater is ideal for just about every single-family home
  • It performs well at elevations up to 2000 feet. It performs poorly at elevations of 5000 feet and above.
IMPORTANT NOTE: Cannot be used for HYDRONIC SYSTEMS, RECIRCULATING, or FLOOR HEATING.  
Surprise! Use this code for a 5% discount on all EccoTemp Product Orders. Code: HOORAY5

The Eccotemp i12 Indoor Tankless Water Heater is one of the most advanced indoor models of the Eccotemp tankless line. Rated at an impressive 4.0 GPM with a temperature rise of 38 degrees and 80,000 BTU per hour, the Eccotemp i12 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.

The Eccotemp i12-LP (liquid propane) and Eccotemp i12-NG (natural gas) are ideal for smaller sized single-family homes, apartments, condos, and cabins as well as small commercial applications. Using 1-2 hot water applications simultaneously is a breeze with the Eccotemp i12. 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 wall-mounted Eccotemp i12 is compact and has a 110/120-volt UL listed power cord that powers the internal Exhaust Fan, Digital Display and PCB. With its fully automated control system, the Eccotemp i12 only pulls about 0.5 amps during operation, making it an ideal for low energy consumption and efficiency.

The Eccotemp i12 has been tested at elevations up to 2000 feet. Installation and use of the Eccotemp i12 above 2000 feet may affect overall product efficiency and performance. Installation and use of the Eccotemp i12 above 5000 feet is not recommended.

IMPORTANT NOTE: Cannot be used for HYDRONIC SYSTEMS, RECIRCULATING, or FLOOR HEATING.

Additional Information

  • Rated for 1-2 applications used simultaneously means that taking a shower and running two sinks at the same time is effortless. The Eccotemp i12 is ideal for hot water heating applications in smaller sized residential single-family home, condo, cabin, apartment, or light commercial use
  • Rated at 4.0 GPM at 80,000 BTUs with a temperature rise of 38 degrees, this ultra-efficient tankless water heater is ideal for just about every single-family home
  • 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
  • Limited Manufacturer Warranty (Heat Exchanger: 5 Years, Parts: 2 Years, Free Accessories - fittings, accessories, hardware pack, etc.: 30 days), live chat, appointments for product support, self-help guides will give you peace of mind that the Eccotemp i12 will keep you in hot water for years
  • What's Included: i12-LP tankless water heater, wall thimble, gas appliance shut off valve, 15” termination pipe, mounting hardware, and installation manual
  • The Eccotemp i12 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
  • Not CSA Certified
Map Zone Southern Region, Northern Region, and Mid Region
Color Black
Flow Rate 4.0 GPM
Installation Indoor
Applications Apartment, Condo, Townhome, Cabin, Tiny Home, or Mid-Size Home
Power Types Liquid Propane (LP) or Natural Gas (NG)
Dimensions 15.70" x 27.50" x 10.90"

Links

View the Eccotemp L10 Tankless Propane Water Heater here

If you are buying the Eccotemp i12 for a Van Water Heater, click here to see our other Van Conversion offerings

If you are buying the Eccotemp i12 for a Tiny House Water Heater, click here to visit our Tiny House Hub


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