Question 1

How do know which size to buy? We will supply two bathrooms, dish washer, clothes washer. What size should I choose?

Accepted Answer

I noted someone below stating they got the largest one and they can only run one water source at a time. My guess is they installed it wrong by not getting the electric hooked up right, or maybe the unit was just defective, or they live in Alaska. I went under size with an Eco 27 a few years ago because that’s all my electric panel could handle. We have zero issues in the summer. During winter months we can only run one shower at a time and have to slowly fill a tub (maybe 3/4 fill speed). To save as much money as I am on electric bill and have unlimited shower lengths (only 1 person at a time mid-Dec to mid-March) is totally worth it. On here today because I’m thinking of upping my panel size so was thinking of going with a larger one now. Regardless, CCRC’s experience with the largest unit not working is nothing like the experience I’ve had, and again I intentionally undersized mine for the house. The website has a clear chart to explain size you need based on number of water fixtures in your home and ground water temperature.

Question 2

My inlet temp is 44 degrees. I'm only concerned with using one shower. Will this supply 
105 degrees at 1.75 GPM's?

Accepted Answer

My water heater receives a cold water supply of about 40 degrees, than produces HOT water @ about 140, depending on the distance between the heater and the shower (travel time) you should do fine.

Question 3

Just to be certain, please confirm if this is a whole house water heater. Can I simply remove my current 50 gal water heater and install this?

Accepted Answer

We installed this last July and have been very happy with it. We have a small house of about 1000 square feet and 2 people and my daughter coming by every week with lots of laundry. We have had no problems what so ever.

Question 4

I just bought the ECO 18. I was prepared to have a double 40A breaker installed, but the instructions say I need TWO double pole 40A. Is that correct?

Accepted Answer

The ECO-18 requires two seperate circuits therefore two 40A breakers.  We love ours, infact we just bought a second one for the hot tub.  Sure saves on the electric bill.

ASIN	B0047V0KSU
Best Sellers Rank	#88,871 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #97 in Water Heaters
Brand	EcoSmart
Brand Name	EcoSmart
Color	White
Customer Reviews	4.3 out of 5 stars 2,435 Reviews
Efficiency	99.8 %
Flow Rate	3.51 Gallons Per Minute
Global Trade Identification Number	00854920002046
Heat Output	18 Kilowatts
Included Components	electric tankless water heater
Is Electric	Yes
Item Dimensions W x H	14"W x 17"H
Item Type Name	Electric Tankless Water Heater
Item Weight	11.7 Pounds
Manufacturer	EcoSmart Green Energy Products
Manufacturer Part Number	ECO 18
Manufacturer Warranty Description	Lifetime Warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages.
Material Type	Metal
Model Number	ECO 18
Mount Type	Wall
Power Source	Corded Electric
Product Dimensions	14"W x 17"H
Special Feature	special_feature
Special Features	special_feature
Style Name	ECO 18
UPC	854920002046
Unit Count	1.0 Count
Voltage	240 Volts
Wattage	18000 watts

ECO 18

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