What it delivers
The WINTEMP WN27 Electric Tankless Water Heater is a whole-house electric tankless rated at 27 kW on 240 volts. Its listing gives a maximum flow of 6.5 GPM.
Expect about 2.6 GPM with cold winter water (a 70°F rise) and 4.1 GPM when the inlet is milder (45°F rise); that is 1 shower at 2 GPM in January. Try your own inlet temperature.
At 240 volts 27 kW is about 112 amps (the listing states 113 A). The maker calls for 3 x 40 Amp double-pole (DP) breakers. The requirement calculator shows it at 208 V too; an electrician confirms the panel.
Electric tankless units need no venting and no gas, and work best where inlet water stays mild, because every degree of rise costs flow.
Listed details: features: Child lock, LED Display, Overheat Protection; connections: 3/4" npt; connectivity: WiFi; material: Acrylonitrile Butadiene Styrene; model: WN27; warranty: 2 Year.
The listing gives dimensions of 11.1 in (W) x 19.2 in (H) and a weight of 12.7 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
- 27 kW
- Up to 6.5 GPM
- No venting or gas line
- Breakers stated by the maker
Trade-offs
- Draws about 112 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 | WN27 | Retailer |
|---|---|---|
| Dimensions (seller) | 11.1"W x 19.2"H | Retailer |
| Features (seller) | Child lock, LED Display, Overheat Protection | Retailer |
| Power | 27 kW | Retailer |
| Voltage | 240 V | Retailer |
| Max flow (maker) | 6.5 GPM | Retailer |
| Product weight | 12.7 lb | Retailer |
| Warranty | 2 Year | Retailer |
| Material | Acrylonitrile Butadiene Styrene | Retailer |
| Amps (maker) | 113 A | Retailer |
| Breakers (maker) | 3 x 40 Amp double-pole (DP) breakers | Retailer |
| Connections | 3/4" npt | Retailer |
| Connectivity | WiFi | Retailer |
Rival units at this flow
More electric tankless water heaters rated for similar demand
- ThermoMate EH180 18 kW Electric Tankless Water Heater
- FOGATTI ET24 Electric Tankless Water Heater
- ThermoMate ET240 24 kW Electric Tankless Water Heater
- WINTEMP WM18V 18 kW Electric Tankless Water Heater
Full electric tankless water heaters spec grid · Every WINTEMP unit in the catalog
Final verdict
A well-specified whole-house electric tankless for 2 showers at once in mild climates.
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