What it delivers
The SIVUATEK V7B-180B 18 kW Electric Tankless Water Heater is a whole-house electric tankless rated at 18 kW on 240 volts. Its listing gives a maximum flow of 2.8 GPM.
Expect about 1.8 GPM with cold winter water (a 70°F rise) and 2.7 GPM when the inlet is milder (45°F rise); that is less than one 2 GPM shower in January. Try your own inlet temperature.
At 240 volts 18 kW is about 75 amps. The maker calls for two x 40A Double Pole Circuit Breaker. 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" npt; material: Aluminum, Brass, Metal; model: V7B-180B; warranty: Manufacturer warranty for 2 years from the date of purchase.
The listing gives dimensions of 11 in (W) x 3 in (H).
Warranty, per the listing: Manufacturer warranty for 2 years from the date of purchase.
Right unit for this house?
Install it when
- One shower at a time 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
- 18 kW
- Up to 2.8 GPM
- No venting or gas line
- Breakers stated by the maker
Trade-offs
- Draws about 75 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 | V7B-180B | Retailer |
|---|---|---|
| Dimensions (seller) | 11"W x 3"H | Retailer |
| Features (seller) | Easy control, Intuitive display, Overheat Protection, Standard pipe fittings, Touch sensor | Retailer |
| Power | 18 kW | Retailer |
| Voltage | 240 V | Retailer |
| Max flow (maker) | 2.8 GPM | Retailer |
| Material | Aluminum, Brass, Metal | Retailer |
| Warranty | Manufacturer warranty for 2 years from the date of purchase | Retailer |
| Breakers (maker) | two x 40A Double Pole Circuit Breaker | Retailer |
| Connections | 3/4" npt | Retailer |
Rival units at this flow
More electric tankless water heaters rated for similar demand
- Eemax HA027240 18 kW Electric Tankless Water Heater
- Ranein RE18K 18 kW Electric Tankless Water Heater
- WINTEMP YQ-WN18K 18 kW Electric Tankless Water Heater
- Orbek ET018 18 kW Electric Tankless Water Heater
Full electric tankless water heaters spec grid · Every SIVUATEK unit in the catalog
Final verdict
A well-specified whole-house electric tankless for one shower at a time in mild climates.
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