Stiebel Eltron Tempra 36 Trend
#2 in ElectricFull review
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.
Amazon $749$749
The Stiebel Eltron Tempra 36 Trend rates 4.1 among electric tankless water heaters; the ThermoMate CZ750NG rates 4.1 among gas ones. The ThermoMate CZ750NG costs $9.01 less ($739.99 vs $749).
ThermoMate CZ750NG
#6 in GasFull review
A low cost indoor whole home heater for natural gas homes, but check the warranty with ThermoMate before buying.
Amazon $739.99$739.99
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different fuel classes (electric and gas), and each is scored against the reference points for its own class, so a rating says how well each does among its own fuel peers. How we rank explains each factor.
| Factor weight | Stiebel Eltron Tempra 36 Trend | ThermoMate CZ750NG |
|---|---|---|
| Overall rating | 4.1/5 | 4.1/5 |
| Value 35% | 58 $20.81 per kW ($749, 36 kW) | 100 $3.72 per 1,000 BTU/h ($739.99, 199,000 BTU/h) |
| Heating power 25% | 100 36 kW | 100 199,000 BTU/h |
| Efficiency 15% | 100 0.98 UEF | 6 0.81 UEF |
| Warranty 25% | 57 7-year heat exchanger warranty | 50 heat exchanger warranty not published (neutral score used) |
Specifications
| Stiebel Eltron Tempra 36 Trend | ThermoMate CZ750NG | |
|---|---|---|
| Heating | ||
| Fuel | Electric | Gas |
| Gas type | - | Natural gas |
| Gas input | - | 199,000 BTU/h |
| Electric power | 36 kW | - |
| Max flow | 7.5 GPM | 8 GPM |
| UEF | 0.98 | 0.81 |
| Condensing | - | No |
| Installation | ||
| Venting | - | Indoor |
| Vent type | - | 3 in OD vent |
| Voltage | 240 V | - |
| Breakers | 150 A total | - |
| Weight | 19 lb | - |
| Features | ||
| Built-in recirculation | No | No |
| Wi-Fi | No | No |
| Heat exchanger warranty | 7 years | - |
| Parts warranty | 3 years | - |