Eccotemp 45HI-NG 6.8 GPM Natural Gas Tankless Water Heater Manufacturer RFB

  • Model: Eccotemp
  • SKU: 45HI-NGR
Eccotemp 45HI-NG 6.8 GPM Natural Gas Tankless Water Heater Manufacturer RFB

Extended Warranty Options

  • Details
  • Details
  • Details
Warranty has been added in!

In Stock
/  75 Sold
Ships Same Day
If ordered by 12PM EST
  • Free Shipping Options Available
  • Price Match On Most Items
  • Manufacturer Direct
  • Exceptional Customer Service
  • Free Replacement Shipping
To place an order over the phone or for immediate assistance, please call (888) 978-4993. For after hours sales please call (888) 999-1522.

Manufacturer Refurbished units.  Most look brand new, some may show minor signs of use.  They are items that are returned due to under sizing, shipping damage, or other minor issues.  All refurbished units are repaired and tested to ensure proper operation. Ships from the manufacturer.

Manufacturer Refurbished 100% certified by the manufacturer
Manufacturer Refurbished Guaranteed to work like new or your money back
Manufacturer Refurbished 90 day factory warranty
Manufacturer Refurbished Authorized Eccotemp dealer
Manufacturer Refurbished Free Shipping


The Eccotemp 45HI-NG Indoor Natural Gas Tankless Water Heater  is the largest indoor model of the Eccotemp tankless line. Rated at an impressive 6.8 GPM and 150,000 BTU per hour, the 45HI-NG can meet all the hot-water needs of a standard home or apartment with one or two bathrooms, as well as smaller commercial applications. The compact, wall mounted 45HI-NG is powered by natural gas. With its fully automated control system, the Eccotemp 45HI-NG is the ideal choice for any standard sized home.

What’s included:

  • 110 volt UL listed power cord
  • T&P Relief Valve
  • Gas Shut Off Valve

Product Features:

  • CSA certified for US and Canadian use
  • Hot water capacity range: .8 - 6.8 GPM
    • 35-degree rise: 6.8 GPM
    • 50-degree rise: 5.0 GPM
    • 70-degree rise: 3.4 GPM
  • Activation Flow .8 GPM
  • Natural Gas Powered
  • Digital display with simple controls and diagnostics
  • Energy Factor: 0.80
  • Energy rating: 82%
  • Maximum / Minimum gas rate: 19,800 - 150,000 BTUs
  • 3/4” Water Inlet & Outlet
  • 3/4” Gas Inlet
  • 4” Venting

Eccotemp 45HI-NG Dimensions:

  • Height 28"
  • Width 15"
  • Depth 7.5"
  • Weight approx. 38 lbs.
  • Shipping weight 39.7 lbs.

    IMPORTANT NOTE: Not recommended for elevation above 3,000 ft. and cannot be used for HYDRONIC SYTEM, RECIRCULATING, or FLOOR HEATING. 

    This product comes with a 90 day factory warranty. An extended warranty may be purchased.

    Customer Reviews

    Based on 5 reviews
    tankless water heater tankless water heater

    I received the tankless water heater on time was very pleased with the delivery however in between the order and delivery my client cancelled with on the tankless water heater I would like a refund as soon as possible hopefully a full refund considering I never opened up the box at all the customer just canceled please respond thank you Larry

    Excellent Tankless Water heater!

    Best price from competitive shopping. Great product and performs per specifications. Excellent customer service and delivered timely. I would recommend this site for anyone!

    Tankless water heatee

    Great product. Does all it says in review..have a huge jetted tub & fillds it completely with hot water..would reccommend it..

    great item but loud fan. needs a cover

    This had an issue with the water flow sensor and it would not ignite. I work the problem around it but it was not fun having an issue thinking you're not going to have hot water that night or the next morning.


    Eccotemp 45HI-NG 6.8 GPM Natural Gas Tankless Water Heater Manufacturer RFB

    Used & Refurbished

    Thousands of units sold with very happy customers and feedback

    Used & Refurbished

    Refurbished products come directly from the manufacturer, so you can be certain of the quality

    Used & Refurbished

    Refurbished products are restored by the manufacturer to the same rigorous standards as those set for new products

    Used & Refurbished

    We offer extended in-home warranties that can be longer than the manufacturer warranty for new items

    Used & Refurbished

    Each unit is individually tested for performance, whereas only a small subset of new units are tested



    Sold Out