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Eccotemp 45HI-NG Indoor 6.8 GPM Natural Gas Tankless Water Heater, White

  • Based on 237 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Eccotemp

Arrives May 3 – May 8
Order within 3 hours and 49 minutes
Available payment plans shown during checkout

Style: Indoor Natural Gas


Features

  • Whole home indoor, Natural Gas powered tankless water heater, rated at 6.8 GPM that activates only when in use, making it an energy effiecient and perfrect for any home. apartment or townhome!
  • The Eccotemp 45H/HI series is CSA Certified for US and Canadian use guaranteeing a safe, easy, and enjoyable installation experience.
  • 4" Venting is required for the indoor models. Venting is available for purchase separately or you can purchase the unit and vent kit as a bundle.
  • The indoor installation will save space in your home and because it is compact and quiet, you will barely notice it is there.
  • Comes with a Temperature and Pressure Relief Valve, a Gas Shut-Off Valve and is equipped with 3/4" NPT fittings.

Brand: Eccotemp


Product Dimensions: 15"W x 24"H


Color: White


Voltage: 120 Volts


Maximum Flow Rate: 6.8 Gallons Per Minute


Brand: ‎Eccotemp


Product Dimensions: ‎15"W x 24"H


Color: ‎White


Voltage: ‎120 Volts


Maximum Flow Rate: ‎6.8 Gallons Per Minute


Heat Output: ‎120 Degrees Fahrenheit


Style: ‎Indoor Natural Gas


Manufacturer: ‎Eccotemp Systems


Part Number: ‎45HI-NG


Item Weight: ‎38 pounds


Item model number: ‎45HI-NG


Is Discontinued By Manufacturer: ‎No


Size: ‎6.8 GPM


Finish: ‎Steel


Installation Method: ‎Wall-Mounted


Item Package Quantity: ‎1


Certification: ‎CSA Certified


Usage: ‎Indoor use only


Included Components: ‎1 x Hardware Pack, 1 x Instruction Manual, 1 x Gas Shut-off Valve, 1 x Temperature and Pressure Relief Valve


Batteries Included?: ‎No


Batteries Required?: ‎No


Warranty Description: ‎5 year manufacturer warranty on parts, 10 year on heat exchanger


Date First Available: May 2, 2014


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: May 3 – May 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Great tankless bang for the buck! Happy wife, happy life!
Style: Outdoor Liquid Propane
For the money, this thing is awesome. Thanks to an Amazon screw up I bought this in crunch time because they sent me a Rennai for natural gas instead of propane. Honestly this was the only propane tankless heater that would ship quickly so I bought it despite all the rotten reviews. Lo and behold I installed it in about an hour and it worked great right out of the gate. It dials up to 140 degrees and takes about 1 minute to get hot water to the nearby faucets. Water temp is every bit as hot as a standard hot water heater. With a cost difference between this and a Rennai of about $300 bucks, only time will tell but for now, I'm completely happy with nothing bad to say! ... show more
Reviewed in the United States on March 21, 2019 by Amazon Customer

  • Flow needs to be crazy high to make it run.
Style: Outdoor Liquid Propane
I got this for my 1000 sq ft house about 3 months ago. The plumbing had to installed and then the inside of the house finished. I didn't get to run or test it until about 3 weeks ago. I was excited to test it, though nervous about the Chinese made heater. At first run, it came on when we turned on the kitchen sink. It ran as advertised heating the water right to 120. Then we tried the shower and and it no longer turned on. I tried the bathroom sink and it came on, but only on nearly full power. After a few hours, the kitchen sink no longer turned on the heater. There is a flow meter inside the opening to the heater that controls when the heater is turned on. The manual with the heater states the heater will come on at .75 gallons per minute flow. I was pulling 1.4 gallons per minute out of my kitchen sink and that was not turning on the heater. I called customer service and explained the problem. The service agent said she had “just had a call about the same model” and she advised that person to replace all their fixtures for flow problem. I was told my plumbing was the culprit. I explained that it should have come on over the .75 flow minimum but she disagreed. I explained that new faucets are only allowed 1.5 gallons max and how could I obtain this flow. By that afternoon the heater was no longer even working. I had all three faucets turned on the same time and the heater did not turn on. I submitted a ticket online since they no longer answered the phone. That started two weeks of hassles. If you are not technically inclined or have to pay plumbers or electricians to install, I recommend you never buy this equipment. Here is an excerpt from their troubleshooting email. If there is no error code and the unit does not come on when the HOT water is turned on. This means that the flow meter is not sending a signal to the computer which starts the machine. 1st to fix this you want to locate the flow meter at the bottom right on the inside of your heater. The flow meter sensor will have a white, plastic piece attached to the front of it, with a set of different colored wires coming from the computer board attached to the top of it. The flow meter sensor has red black and yellow wires coming out of a black sensor that is screwed to the flow meter. 2nd check the wire connections; follow the wires to where it connects to the computer board. If both were connected you will want to remove the flow meter. Then, you will need to remove your water inlet on the outside of your heater, at the bottom right side. There is a metal clip that holds the flow meter sensor in place inside the heater. Remove this metal clip, and blow through the meter- it should make a zing sound when the little fan inside spins. Reinsert the flow meter sensor, re-attach your water inlet, and turn hot water on to see if this resolves the issue. If the display shows two squares rotating up and down. This pertains to the 45H only. 1st push the power button. 2nd If the unit has been in operation for a while and all of the sudden the squares begin rotating. This means power was lost somehow while unit was running. 3rd The flow meter wire is loose on the computer, or the connector where the two wires connect between the computer and the flow meter are loose. 4th The remote itself may have a short, or the power cord going to the computer one of the prongs may not be making a good connection threw the connector or the computer. Regardless of what the error code is; take the two front screws out of the computer board and it will slide out. Pull the inserts that are lined up along the front of that board and put them back in one by one. Plug the unit back in and see if this solves any issues. This went on for 4 emails. At one point I had to have all the plumbing removed from it and then turn it on to test. Each of these emails cost time and money. Finally they called me and asked me to connect all my plumbing to the pressure relief valve. I finally told them no way was I going to connect my plumbing to the safety devise required by law to have nothing plugging it. I was put on hold and eventually hung up on. The whole time I had been begging for a part to try to fix it. As many times as they had me take it apart, I could have tried some new part like a flow meter or circuit board. Instead they gave me a laundry list of suggestions that in no way fixed my problem. I even told them the flow meter did not make a consistent zing as reference in the email above. Finally they sent me and email telling me to remove the heater and send it in for service. If it was within the 30 days of purchase, they would do this for free. I guarantee it no one will ever fall within this 30 days with all the run around they give you with diagnostic emails. I finally called it quits. After all the time and money wasted troubleshooting this heater, I had to give up. In no way was I going to invest any more time on this heater. If all you're going to do is heat a swimming pool, this might be a good heater for you. Don't bother plumbing anything larger than ½ inch since all the piping inside the unit is 3/8 copper or smaller. ... show more
Reviewed in the United States on August 25, 2015 by Chris

  • I don't understand all the bad reviews for this tank
Style: Indoor Natural Gas
I don't understand all the bad reviews for this tank. It works perfectly for me! I have a feeling most of them are because of misunderstanding how a tankless works. The best thing to do is run hot water full blast in your shower and adjust the temp on the unit to whatever you like. Another words don't mix any cold just hot. I like the remote because you can adjust the temp right there in your bathroom, or where ever you install it. ... show more
Reviewed in the United States on June 3, 2018 by Troy

  • Works as designed, not as I'd like.
Style: Outdoor Natural Gas
Seems well made and was easy to install, it replaced another brand that died. pro: comes with a new T&P valve and gas shutoff, if you need these. Also includes spare seals for flex tube. It was easy to cut the wire off the remote control and splice it to the existing control wire that goes through the wall. This way I didn't have to make any new holes. cons: The water fittings are made to mate to flex tubing with rubber seals, this makes it almost impossible to mount the T&P valve right up under the heater where it should be. I tried regular pipe fittings but they won't seal water tight, even with top quality thread sealer. I expected this but thought I'd try anyway. So my T&P valve now sits in a T fitting at the end of a flex tube, the shortest I could get was 10". The cold water inlet also has a 10" flex tube just so I could mate up to the existing piping. Also, this one seems to have a higher idle setting than my old one. On low flow of water you get REALLY hot water out because the flame is too high for a limited flow. So, counter to what you'd think, open the hot water tap MORE to get cooler water. These on-demand heaters are really hoping you don't mix in any cold water, you're supposed to set the temperature you want on the remote and then only use the hot water tap. I don't like any of these heaters the way they are currently designed, but they're code here. We can NOT use a tank heater but with some clever plumbing, a pump, thermostat, and small storage tank you can make an on-demand heater work fairly nicely. ... show more
Reviewed in the United States on December 27, 2015 by Last traveller

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