What it delivers
The APUS AP-ADSK-270G13 27 kW 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. Check your house in the planner.
At 240 volts 27 kW is about 112 amps. The maker calls for 3×40 A breakers. Whether your panel can carry it alongside heating and cooking loads is an electrician's call.
It skips venting entirely, but the amps are the hurdle: check the panel before the plumbing.
Listed details: connections: 3/4-inch NPT; material: Sheet Metal with Insulating Paint; model: AP-ADSK-270G13; warranty: 2 Year Limited Warranty.
The listing gives dimensions of 11.42 in (W) x 17.72 in (H) and a weight of 19 lb.
Warranty, per the listing: 2 Year Limited Warranty.
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
- Weak at a large winter rise
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 | AP-ADSK-270G13 | Retailer |
|---|---|---|
| Dimensions (seller) | 11.42"W x 17.72"H | Retailer |
| Power | 27 kW | Retailer |
| Voltage | 240 V | Retailer |
| Max flow (maker) | 6.5 GPM | Retailer |
| Product weight | 19 lb | Retailer |
| Warranty | 2 Year Limited Warranty | Retailer |
| Material | Sheet Metal with Insulating Paint | Retailer |
| Breakers (maker) | 3×40 A breakers | Retailer |
| Connections | 3/4-inch NPT | Retailer |
Rival units at this flow
More electric tankless water heaters rated for similar demand
- WINTEMP WN27 Electric Tankless Water Heater
- ThermoMate EH180 18 kW Electric Tankless Water Heater
- FOGATTI ET24 Electric Tankless Water Heater
- ThermoMate ET240 24 kW Electric Tankless Water Heater
Full electric tankless water heaters spec grid · Every APUS 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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