Westinghouse WET-18 18 kW Electric Tankless Water Heater
Model WET18
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Kw
18
Voltage
240V
Amperage
80A
Fuel Type
Electric
Tank Type
Tankless
Energy Factor
0.99
Westinghouse WET-18 18 kW Electric Tankless Water Heater Review
The Westinghouse WET-18 is an 18 kW whole-house electric tankless water heater. Smaller variant in the Westinghouse electric tankless line. Sized for 1-bath warm-climate primary residences.
Specs: 18 kW, two 40-amp double-pole breakers, 75A continuous draw at 240V. Capacity: 2.0 GPM at a 60°F rise or 3.0 GPM at a 40°F rise. Stainless steel heat exchanger. 7-year warranty on heat exchanger.
Same capacity class as Rheem RTEX-18 and EcoSmart ECO 18. Westinghouse positioning at value pricing with shorter warranty than EcoSmart's lifetime.
About $500 unit, $1,500 installed. Right buyer: DIY-savvy homeowners comfortable managing service support independently. For most buyers, EcoSmart ECO 18's lifetime warranty makes it the better long-term choice.
Pros
- Tankless electric — zero standby loss; no pilot, no venting, minimal footprint
- UEF 0.99 — top-tier efficiency; qualifies for Inflation Reduction Act §25C residential credit
- 10-year warranty — solid above-average coverage for this class
Cons
- Flow rate drops in cold climates where inlet water is below 45°F — size up if ground water is cold
Full Specifications
Brand
Westinghouse
Model Number
WET18
Kw
18
Voltage
240V
Amperage
80A
Fuel Type
Electric
Tank Type
Tankless
Energy Factor
0.99
Flow Rate Gpm
2.6
Warranty Years
10
Capacity Gallons
0
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