Ecosmart ECO 18 Electric Tankless Water Heater

If you are a resident of South Texas, New Mexico, South Florida, Arizona, South California or any place where temperature is 62 ° F and above, than this is a good choice. Ecosmart ECO 18 Electric Tankless Water Heater is compact and can be wall mounted like other tank less heaters of Ecosmart group. This new generation tankless heater saves electric consumption up to 60% by its self modulating technology. Two biggest features that you may be considering before buying a heater-Warranty & Installation ease is guaranteed for ecosmart eco 18.

Ecosmart ECO 18 Electric Tankless Water Heater

Compact and space saving

If you live in a flat or do not have a spacious bathroom ;or not a fan off showing of the gadget behind your comfortable warm water flow than you would be glad to know it can be easily hidden behind a cabinet. This compact heater with 17" x 14" x 3.75" size (the size of a laptop) saves 12 cubic feet of your storage space, which would otherwise be consumed by a traditional heater.

Nonstop hot water supply

At inlet temperature of 42 ° F -52° F a bit cold weather Ecosmart ECO 18 Electric Tankless Water Heater can support 1 shower and 1 sink 24/7. However if inlet water temperature is 57° F-62° F ecosmart 18 can support 2 sink and a shower meaning you can use a sink, a washing machine and a shower and never run out of hot water. At 77° F this best seller tanksless water heater supply endless hot water to 2 shower and 2 sinks.

60% cost saving

Well there can be an argument if it saves 60% or 50% cost but one thing that is confirmed is as soon as you replace your traditional heater with this tankless water heater your electric cost will reduce half or more. This self modulating technology enabled water heater can sense water flow and run heater only when flow is active, saving a water full tank to be kept hot always.

Control the heat

The Digital temperature control system let you control the severity of the heat. This new technology uses a flow control valve along with a thermistor to control the heat of the water with differential flow of water.

There is a digital scale in this heater like other tankless water heaters of Ecosmart group it also offers 80°F - 140°F heat. You can easily increase the heat in increment of 1 degree, making your bath water as hot or cold as you always wanted and let it flow as long as you want without any change in heat, that is what some users termed as decadent luxury.

Beautiful design

For me heater does not need to look beautiful as long as it works without deviation. However ecosmart group do focus on looks along with efficiency. This particular model comes with a simple design it also has a cosmetically pleasing outward. So if you are planning to put your wash room picture in pinterest showing how a best tankless water heater can give your bathroom a spacious look than you can go for it.


  • 99.8% energy efficient
  • It provides lifetime warranty (of faulty part repairment) for residential usage, when installed by professional plumber and electrician
  • Electric consumption reduced 60% in compare to traditional heaters
  • Compact, light weighted, stylish
  • If you are not satisfied, you can return it anytime before 30 days

Cons with solution

Cost of installation

Plumbing and electrical of ecosmart 18 is fairly simple, it could be achieved with elementary DIY know how. What is required to be remembered is it requires two double poles of 40 amp breakers.

Installation though easy and doable you cannot do it yourself because it will not let you retain life time warranty if electrical and plumbing is not done by a professional plumber and electrician. This is going to cost you lot.


Get the proper electrical and plumbing instrument that means-

a)  150 amp(minimum) electrical panel for installation

b)  Two double pole breakers of 40 amp that are connected to 2 sets of #8 awg wire

c)  Additional support is given at the number provided with the instruction and also with Amazon website.

Too hot at beginning

At morning when first start it can cause water to be too hot at first that after 5-7 second of jolting of cold and hot it stabilizes.

Also minor fluctuating electricity is noticed in some bathroom bulbs when turned on.


a)  Electrical need to be installed by NEMA standards

b)  Again be sure to maintain the 150 amp(minimum) electrical panel for installation

Ecosmart technical group concluded-Such problems are more prone to a house’s wiring, faucet valve stuffiness and internal water carrying water pipe dimensions.

Not very hot for bathtub

Yes many have complained bathtub showering is not very comfortable with this model. Water is only Luke warm even if that is the only faucet running at a time.


Usually bathtubs fixtures have higher flow rate than sinks. Ecosmart 18 is a moderate heater applicable for less cold weather so if inlet water temperature is very low or flow is too high than such problems are common. To get rid of it you will need to introduce new valves and obtain a slow flow. This is going to cost you some 20-50 dollar extra.

Frequently Ask Questions

  • Q- How to decide if ECO 18 is enough for my home? I have 2 bathrooms. Washing machine and dish washer are also there?
  • Ans- Eco smart group and also Amazon has a clear guideline about- at which temperature how many washing faucet and bathing faucet each design of ecosmart water heater can support. Your home sounds to need a heater with more power than Eco 18
  • Q- Do they provide a pressure release valve with heater?
  • Ans- In most cases you will need it but ecosmart group do not provide it. You will need to buy it separately.
  • Q- My old tank heater needs only one 40 a breaker than why I need 2 double 40 a mp breaker for Ecosmart ECO 18 Electric Tank less Water Heater.
  • Ans- It’s going to need 2 double 40 amp breaker because -Ecosmart ECO 18 Electric Tankless Water Heater has to heat a lot of water in flow at a very fast rate unlike that of a thankful water heater, so it needs more power consumption when in use. On the other hand power is saved when it is idle so is your electric bill.

Final verdict

If you have few family member, live in a warm place (57 ° F and above) and looking for a Whole home water heater (that is what ecosmart group calls it) you can shop for Ecosmart ECO 18 Electric Tankless Water Heater. I repeat please read the electrical and plumbing requirement before you go for it. If your wiring does not support it you cannot understand why this product is ranked 4.2 out 5 in 354 customer review.

Click Here to Leave a Comment Below 1 comments