Eccotemp i12-NG Indoor Tankless Heater Review

If you are very concerned about the utility bill and looking for a very energy efficient water heater than Eccotemp i12-NG Indoor tankless heater is a good choice. Eccotemp i12-NG Indoor tank is natural gas operated much appreciated for its sleek designed. This fully automatic tankless water heater is so easy to install that you may not need any professional help. It is set at 3 GPM but you can avail a shower as fast as 4.8 showing good value.

Eccotemp i12-NG Indoor Tankless Heater

Features of Eccotemp Indoor Tankless Heater

Low power consumption

I am a very energy conscious person may be that is why I liked the fact that It only consumes 2 watts when idol and 1.07 amps during operation, making it incredibly energy efficient domestic device.

Efficient for medium home at cold places

Whether you live in Northern Michigan or a colder place like buffalo this gas fired tankless heater is ideal for small to medium sized homes. It can support a shower and a basin simultaneously. At 2.5 GPM it can run 3 faucets. So if you are in a rush and have to do multiple works at a time-dish washing, washing machine, and kitchen faucet it is easily possible. Even Jacuzzi tub with 97 degree water flow can be filled with running it 20 minutes with 1.5 gallon per minute. A small tub at far from the point the heater is also can be filled in 10 minutes with 1.5 GPM, with higher GPM and cold water mixing it can save more time. More than the size of the home it is based on the member of the home deciding the efficiency issue.

Easy installation

Unlike tank heater Eccotemp NG Indoor tankless heater is very easy to install and light weighted. It comes with a horizontal stainless steel vent kit, a 120 Volt UL listed power cord which is used for powering the internal exhaust Fan and the heater’s digital display.

Space saving

Gone are the days to hang a big tank water heater, they were neither good looking nor space saving. This sleek designed tankless water heater is precise and has a very modern look. The display is black and gives a feeling of safety. It will save 12.5 cubic feet of your space which would otherwise be lost by a tank water heater.

Beautiful design with detail display

tankless water heaters reviews says-Eccotemp i12-NG Indoor tankless heater has a sleek black acrylic glass casing. Once you set the temperature it controls the temperature automatically. I liked the touch screen, it shows the shows GPM flow along with the output temperature.

Safe for home with kids

Without any tank it is already a safe choice for any aged people. The outer shell never warms up although it can run for hours. And cherry on top is it has a child lock to keep any chance of scalding away.

Automatic heat control

Eccotemp FVI12 NG model another model of this company has same feature and capacity. Yet the manufacturers went to build this one because it has an added feature of Automatic temperature control. This system reduces the problem of a minimum requirement of flow rate to activate the burner.


  • Child lock
  • Looks like a big I pad
  • Space saving
  • Energy cost reduced
  • Very easy to operate
  • Hot water range: 0.6 - 4.8 GPM
  • It need no additional adjustment at is built for standard household 120-volt electric outlet


Small vent pipes

The vent pipe supplied with Eccotemp i12-NG Indoor tankless heater is quite small, around 2 inches diameter and 18 inches in length. It can give hard time to vent water through wall to a fairer place, but you cannot use any existing bigger pipe if it’s not stainless steel, it will violate the warranty policy.


If you are hanging it at outside wall and letting water to go through wall you can shop for a 2” pipe longer in length and made of stainless steel. It must be a stainless steel pipe, as it has to bear the high heat of 80,000 BTU.

Many extra parts are required

It does not provide any clean out valves for maintenance. Some users also felt the need of buying extra exhaust fans.


For good maintenance it is safe to buy extra exhaust fans, although it is not essential; therefore only one exhaust fan is attached with it.

It is better to order a 3/4" valve kit it will help you so that you can clean the unit every 6 months with the cleaning kit from Amazon.

No clear instruction about using child lock


To activate the child lock you need to hold on the screen for 10 seconds. Voila it is activated.

Frequently Ask Questions (Q&A)

  • Q- Will it work for a 2000 sqft?
  • Ans –it depends on the people who use hot water at same time; it can allow 3 faucets at a time so yes may be if you have 4-5 people at home you can buy it.
  • Q-Does it need a plug or hard wire?
  • Ans- These things comes with the heater. A Stainless steel vent kit. 120 volt UL listed power cord. 2.5”-3” Stainless steel adapter. A 2 year of warranty.
  • Q-What is it height and weight?
  • Ans-its size is 16 x 16 x 11 inches. Weight 29 pounds


If you live in a cold place with 37 degree F have a home with 2-5 people, than you can shop for Eccotemp i12-NG Indoor tankless heater. It has an automatic heat controlling feature that will maintain a constant heat irrespective of fluctuating water flow. It will reduce your power consumption 30-50%.So if you are energy conscious and looking for an efficient cost saving powerful tankless gas water heater, this one is to go for.

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