The WET series is Westinghouse\'s whole-house electric tankless line — positioned in the value middle between Titan/EcoSmart and premium Stiebel Eltron Tempra Plus. Constant-power modulation (not Stiebel\'s Flow Control), competitive pricing, 10-year heat exchanger warranty.
The lineup
- WET-18 — 18 kW. Warm-climate small home; 2× 40A 240V breakers
- WET-27 — 27 kW. Moderate-climate 2-bathroom volume pick; 3× 40A 240V breakers
- WET-36 — 36 kW. Cold-climate or 3+ bathroom; 4× 40A 240V breakers (160A continuous)
Key features
- Self-modulating output — adjusts kW to demand
- Digital display with setpoint and fault codes
- Compact wall-mount
- Multiple element configuration for redundancy and modulation
- 10-year heat exchanger warranty — better than Rheem RTEX (5 yr), below Stiebel Tempra Plus (7 yr)
Service panel requirements
WET requires significant electrical capacity. Verify before purchasing:
| Model | kW | Breakers | Continuous draw |
|---|---|---|---|
| WET-18 | 18 | 2× 40A 240V | ~80A |
| WET-27 | 27 | 3× 40A 240V | ~120A |
| WET-36 | 36 | 4× 40A 240V | ~160A |
WET-36 at 160A continuous is service-panel-intensive. Many 200A residential services don\'t have spare capacity.
WET vs competitors
| Westinghouse WET-27 | Stiebel Tempra 24 Plus | Rheem RTEX-24 | EcoSmart ECO 24 | |
|---|---|---|---|---|
| kW | 27 | 24 | 24 | 24 |
| Modulation | Constant power | Flow Control | Constant power | Constant power |
| Heat exchanger warranty | 10 yr | 7 yr | 5 yr | Lifetime (residential) |
| Parts warranty | 5 yr | 3 yr | 1 yr | 5 yr |
| Typical price | $649-799 | $849-1,049 | $549-699 | $549-699 |
Sizing
- Sun Belt, small home: WET-18
- Sun Belt, 2 bathroom OR Mid-Atlantic 1 bathroom: WET-27
- Mid-Atlantic 2+ bathroom OR cold climate: WET-36
Bottom line
WET sits between budget (EcoSmart, Titan) and premium (Stiebel Tempra Plus) in price and features. 10-year heat exchanger warranty is the highlight. Constant-power modulation means cold-climate performance is good but not exceptional. For Flow Control technology, choose Stiebel; for budget, EcoSmart; for middle ground, Westinghouse WET.