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45HI-NG 6.8 GPM WholeHome/Residential 140,000 BTU CSA Approved Natural Gas Indoor Tankless Water Heater

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  • Ideal for any standard home or apartment
  • Wall mountable
  • Features a digital display with simple controls and diagnostics
  • View More Details
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Product Overview

The Eccotemp 45H 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° and 140,000 BTU per hour, the Eccotemp 45Hi-NG 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 45Hi-NG for standard size single-family homes, apartments, condos, cabins, as well as smaller commercial applications. Using 2-3 hot water applications simultaneously is a breeze with the Eccotemp 45Hi-NG. 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 45Hi-NG 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 45Hi-NG is ideal for low energy consumption and efficiency. The Eccotemp 45Hi has been CSA tested and approved for US & Canadian use at elevations up to 2000 ft. Installation and use of the Eccotemp 45Hi above 2000 ft. may affect overall product efficiency and performance. Installation and use of the Eccotemp 45Hi above 5000 ft. is not recommended.
  • Rated for 2-3 applications used simultaneously means that taking a shower and running two sinks at the same time is effortless.
  • The Eccotemp 45H 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
  • Limited Manufacturer Warranty (Heat Exchanger: 10 Years, Parts: 5 Years), live chat, appointments for product support, self-help guides will give you peace of mind that the Eccotemp 45Hi will keep you in hot water for years
  • Our easy and affordable 4" stainless steel horizontal and vertical vent kits make the Eccotemp 45HI Tankless Water Heater economical and affordable to install.
  • The Eccotemp 45H 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's Included: 45Hi-NG tankless water heater, mounting hardware, gas appliance shut off valve and installation manual
  • Click here to check out our buying guide on water heaters



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Additional Resources

From the Manufacturer

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45HI-NG 6.8 GPM WholeHome/Residential 140,000 BTU CSA Approved Natural Gas Indoor Tankless Water Heater
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BrandEccotempRinnaiRheemRheem
Name45HI-NG 6.8 GPM WholeHome/Residential 140,000 BTU CSA Approved Natural Gas Indoor Tankless Water HeaterHigh Efficiency 6.5 GPM Residential 150,000 BTU Natural Gas Interior Tankless Water HeaterPerformance Plus 7.0 GPM Natural Gas Indoor Tankless Water HeaterPerformance Plus 8.4 GPM Natural Gas Indoor Tankless Water Heater
Price
Add to Cart to See Price
$88809
$89900
$101900
Ratings
(122)
(534)
(280)
(280)
Indoor/OutdoorIndoorIndoorIndoorIndoor
Gas TypeNatural GasNatural GasNatural GasNatural Gas
Number of Showers1-21-21-21-3
Application TypeResidentialResidentialResidentialResidential
Efficiency LevelHighHighHighHigh
Water Heater FeaturesWall MountedFreeze Protection,Wall Mounted,WiFiOverheat Protection,Ultra LoNox,Wall MountedUltra LoNox
Fuel TypeGasGasGasGas
Total BTU140000 Btu150000 Btu160000 Btu180000 Btu
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Specifications

Dimensions

Product Depth (in.)
6 in
Product Height (in.)
25.5 in
Product Width (in.)
14.5 in
Vent diameter (in.)
4 in
Water Connection Size (in.)
3/4 in

Details

Application Type
Residential
Efficiency Level
High
Finish Family
White
Flow Rate @ 35°F Rise (gallons/min)
6.8 gal (US)/min
Flow Rate @ 45°F Rise (gallons/min)
5.8 gal (US)/min
Flow Rate @ 55°F Rise (gallons/min)
4.5 gal (US)/min
Flow Rate @ 65°F Rise (gallons/min)
3.2 gal (US)/min
Fuel Type
Gas
Gas Connection Size
3/4 in
Gas Type
Natural Gas
Heat Exchanger Warranty
10 Year
Indoor/Outdoor
Indoor
Maximum Temperature (F)
120 °F
Minimum Activation Rate (gpm)
0.7
Minimum Temperature (F)
90 °F
Number of Showers
1-2
Pack Size
1
Product Weight (lb.)
36.4 lb
Required Volt Connection
120 volt
Returnable
90-Day
Total BTU
140000 Btu
Uniform Energy Factor
0.82
Vent Type
Single Wall
Water Heater Features
Wall Mounted
Wattage (watts)
50 W

Warranty / Certifications

Certifications and Listings
CSA Certified
Labor Warranty
No Warranty
Part Warranty
5 Year

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
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  • What are the dimensions of the product?

Customer Reviews

  • 3.3
    out of 122 reviews
  • 56%recommend this product
Filter by:
Showing 1-10 of 122 reviews
you get what you pay for
We purchased this unit for our two bathroom home and kitchen and laundry. It worked ok for the first six months then it started beeping at us whenever we turned on the hot water. We were told to open the panel and remove the sensors and clean them. After doing that it worked for about a week then it started beeping at us again. So now when we need hot water we have to turn the water on go to the panel which will be beeping and there will be a code E1(error 1) on the display- turn it off then turn it on inorder to take a shower or do laundry. Obviously both my wife and I are tired of this and i will be looking for a replacement that uses the single stack exhust system very soon. Like the saying goes you get what you pay for. I hope those looking choose wisely before investing the time and labor into choosing one of these units- also keep in mind that the unit does not come with the vent pipe needed. Home depot does not carry the vent pipe - you will have to purchase it from the manufactures website, I think it was a few hundred dollars
by
Response from Eccotemp Product ExpertJun 14, 2021
Thank you for taking the time to leave a review. We appreciate all feedback and any chance to help improve our customer experience. We hate that you're not 100% satisfied and wanted to take a moment to answer your inquiries. The E1 error code on the 45HI-NG tankless water heater is mainly a gas-related problem, it is sensing an unbalanced gas pressure and also co-relates with water flow. It is indicated in the manual on what to set for the correct gas pressures and its inches of the water column and for water flow, just make sure no aerators, no restrictions, and no expansion tanks connected before or after the water heater. The E1 error code can also be easily fixed if the proper procedures are done to troubleshoot it. Customer satisfaction means the most to us and we encourage you to please continue to check your support ticket with us often for any update regarding your water heater. Please, reach out to our dedicated support team so that we can best assist. Thank you for choosing Eccotemp! ~ Team Eccotemp Eccotemp
    • Recommended
    1 found this review helpful
    Great water heater to maximize space! I am impressed by...
    Great water heater to maximize space! I am impressed by the hot water we get by demand and the efficiency use of natural gas
    by
    • Verified Purchase
    A very unfair experience in purchasing a water heater. Just days after hook up an error code app...
    A very unfair experience in purchasing a water heater. Just days after hook up an error code appears. I repeatedly sent pictures and videos of a leak inside the unite from a copper elbow. The only option given me was to pay $127 to have it shipped 700 miles to be looked at. It was returned with a replaced electrical component but the leak was not touched yet a worse leak from torn O' ring when technician replaced fitting. In a call I was told that no leak could be found despite the images and videos sent but I was sent new O'ring to replace myself. The original was an obvious leak whenever water ran through the unit. I was sent a 2-part epoxy product that cannot be applied without great difficulty and could not contain the leak. Disabled with fixed income and a family I have been saving to buy a new water heater for 16 months now with cold water for daily use. This is my best recommendation!
    by
      24 found this review helpful
      I installed this water heater in the crawlspace at the same time I added a whole house water filt...
      I installed this water heater in the crawlspace at the same time I added a whole house water filter system and PEX tubing for all the hot and cold water supply. The digital controls made it easy to find and set the perfect temp (134 degrees). Now the dish washer gets the dishes clean without first rinsing and scraping! (I thought we had bought a bad dish washer.) Great hot water for baths and showers. After just a few seconds, we now have unlimited hot water throughout the house, without the waste of energy of storing a limited amount of hot water 24/7 in that old hot water tank.
      by
      • Verified Purchase
      • Recommended
      9 found this review helpful
      Excellent product, much more compact than traditional tank-type water heaters. The only cons are ...
      Excellent product, much more compact than traditional tank-type water heaters. The only cons are 1. it's plug-in, so no hot water when the electricity goes out, and 2. it's not going to lower your gas bill unless you're away from home a lot. Tank-type water heaters work on a standby principle, but tankless ones deliver hot water on demand. The digtal temperature readout is also easier to control than the finicky old-style knobs fund on tank-type water heaters.
      by
      • Verified Purchase
      • Recommended
      13 found this review helpful
      WORTHLESS
      Had water heater for 1 year- never worked right. Home Depot has tried to help but Eccotemp is a waste of time. I have 59 emails on the water heater, tv camera inspection, 3 different wind caps, 3 plumbers, etc. and still not able to fill a tub with hot water. I took out a perfectly good electric water heater for this piece of junk.
      by
        25 found this review helpful
        by
        • Verified Purchase
        Do not buy Terrible Service
        Failed in the year and they make you jump through hoops to get parts after a week of dealing with the mental midget, I replaced the unit.
        by
        Response from Eccotemp Product ExpertFeb 14, 2022
        Thanks for taking the time to leave a review. We appreciate all your feedback and any chance to help improve our customer experience. We hate that you are not 100% satisfied and wanted to take a moment to answer your inquiries.

        We sincerely apologize for the inconvenience. If you still have the heater and you are in contact with our tech support team, I would suggest sticking around. We will do our best to get you the necessary help you need to get your heater fixed.

        Customer satisfaction means the most to us and please, reach out to our dedicated support team so that we can best assist. Thank you for choosing Eccotemp! ~ Team Eccotemp Eccotemp
          defective
          my parents have a tankless so i thought getting one would be an amazing idea! unfortunately since having this installed its been consistently throwing codes and not producing hot water at all without turning the unit off and back on again. I have been back and forth woth thw manufacturer and they have been little to no help as they want ME to do all the troubleshooting when i have ZERO plumbing or electrical experience! with their vague directions i was electrocuted TWICE!! they still refuse to send someone to look at the darn thing, want me to send them the computer board so i will be without any hot water in the middle of winter for God knows how long. i would NOT recommend this to my worst enemy!!
          by
          Response from Eccotemp Product ExpertFeb 3, 2022
          Thanks for taking the time to leave a review. We appreciate all your feedback and any chance to help improve our customer experience. We hate that you are not 100% satisfied and wanted to take a moment to answer your inquiries.

          We sincerely apologize for the inconvenience. It is best recommended to stay in touch with our tech team so they can provide further assistance to get your water heater fixed. If you have a ticket number, please keep it as your reference for your heater's case.

          Customer satisfaction means the most to us and please, reach out to our dedicated support team so that we can best assist. Thank you for choosing Eccotemp! ~ Team Eccotemp Eccotemp
            • Recommended
            by
              Showing 1-10 of 122 reviews