EcoSmart ECO 36
#1 in ElectricFull review
For a large home with 300 A service that wants all electric hot water. The lifetime warranty and low price per kilowatt make it a strong value if a pro installs it.
Amazon $699$699
4.1/5
The pick for a larger home with 300 A service that wants electric whole house hot water, even in cooler regions. Few electric heaters match its power and warranty.
- 36 kWHeating power
- 7.5 GPMMax flow
- 0.98UEF
- 7 yearsHeat exchanger warranty
Check price at Amazon$749
Price checked October 31, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Enough power for whole house hot water even in colder regions
- Made in Germany with a 7 year leakage warranty, longer than the 5 years Rheem gives
- Digital temperature setting holds the outlet temperature steady as flow changes
- Needs no venting, so it mounts on any wall near the panel
Cons
- Needs 3 x 50 A breakers and at least 300 A service, so many older homes need a panel upgrade first
- No Wi-Fi or app control at this price
The Stiebel Eltron Tempra Trend family
Every Stiebel Eltron Tempra Trend model we rank, smallest first. Ratings compare each against its own fuel.
| Model | Heating power | Rating | Price |
|---|---|---|---|
| Stiebel Eltron Tempra 20 Trend | 19.2 kW | 3.2/5 | $544.43 |
| Stiebel Eltron Tempra 24 Trend | 24 kW | 3.6/5 | $514.23 |
| Stiebel Eltron Tempra 29 Trend | 28.8 kW | 3.8/5 | $639.99 |
| Stiebel Eltron Tempra 36 Trend (this one) | 36 kW | 4.1/5 | $749 |
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its fuel. How we rank explains each one.
Specifications
| Model number | 239218 |
|---|---|
| Heating | |
| Fuel | Electric |
| Electric power | 36 kW |
| Max flow | 7.5 GPM |
| UEF | 0.98 |
| Installation | |
| Voltage | 240 V |
| Breakers | 150 A total |
| Weight | 19 lb |
| Features | |
| Built-in recirculation | No |
| Wi-Fi | No |
| Heat exchanger warranty | 7 years |
| Parts warranty | 3 years |
Alternatives in this fuel
Stiebel Eltron Tempra 29 Trend
#3 in ElectricFull review
For homes with 200 A service in mild climates that want two showers at once from one heater.
Amazon $639.99$639.99
Stiebel Eltron Tempra 24 Trend
#4 in ElectricFull review
A whole home heater for a two bathroom house in a warm or mild climate with 150 A service or more. The 7 year leakage warranty is the main reason to pay over the Rheem.
Amazon $514.23$514.23
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