What it delivers
The WINTEMP WN36 Electric Tankless Water Heater is a whole-house electric tankless rated at 36 kW on 240 volts. Its listing gives a maximum flow of 8.7 GPM.
Flow depends on how cold the incoming water is. Our estimate from its input: 5.5 GPM at a 45°F rise, falling to 3.5 GPM at 70°F, which is 1 shower at 2 GPM on a cold-climate winter day. Try your own inlet temperature.
At 240 volts 36 kW is about 150 amps (the listing states 150 A). The maker calls for 4) × 40A double-pole (DP) circuit breakers. Whether your panel can carry it alongside heating and cooking loads is an electrician's call. On its own it takes more than 60% of a 200-amp service.
Electric tankless units need no venting and no gas, and work best where inlet water stays mild, because every degree of rise costs flow.
Also on the listing: features: LED Display, Overheat Protection, Temperature Lock; connections: 3/4" npt; connectivity: WiFi; material: Metal; model: WN36; warranty: 2 Year.
The listing gives dimensions of 13.7 in (W) x 21.5 in (H) and a weight of 36.1 lb.
Warranty, per the listing: 2 Year.
Right unit for this house?
Install it when
- 2 showers at once in mild climates
- Homes with no gas service
Look at another unit when
- Panels without spare capacity
- More than 1 shower at once in cold winters
Strengths and trade-offs
Strengths
- 36 kW
- Up to 8.7 GPM
- No venting or gas line
- Breakers stated by the maker
Trade-offs
- Draws about 150 A
- Winter flow is much lower
Install limits
- Figures are the maker's or seller's own. Flow at a rise is our estimate from the input; gas, venting and electrical work needs a licensed professional.
Rated performance
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Model number | WN36 | Retailer |
|---|---|---|
| Dimensions (seller) | 13.7"W x 21.5"H | Retailer |
| Features (seller) | LED Display, Overheat Protection, Temperature Lock | Retailer |
| Power | 36 kW | Retailer |
| Voltage | 240 V | Retailer |
| Max flow (maker) | 8.7 GPM | Retailer |
| Product weight | 36.1 lb | Retailer |
| Warranty | 2 Year | Retailer |
| Material | Metal | Retailer |
| Amps (maker) | 150 A | Retailer |
| Breakers (maker) | 4) × 40A double-pole (DP) circuit breakers | Retailer |
| Connections | 3/4" npt | Retailer |
| Connectivity | WiFi | Retailer |
Rival units at this flow
More electric tankless water heaters rated for similar demand
- EcoSmart ECOS 27 Electric Tankless Water Heater
- Eemax HA024240 24 kW Electric Tankless Water Heater
- Rheem RTEX-24 Electric Tankless Water Heater
- Stiebel Eltron Tempra 29 Trend 28.8 kW Electric Tankless Water Heater
Full electric tankless water heaters spec grid · Every WINTEMP unit in the catalog
Final verdict
A practical whole-house electric tankless for 2 showers at once in mild climates.
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