What it delivers
The CRAFTSMAN CMXTEPA0024 24 kW Electric Tankless Water Heater is a whole-house electric tankless rated at 24 kW on 240 volts. Its listing gives a maximum flow of 4.6 GPM.
At a 45°F rise (mild inlet water to a 120°F set point) it holds about 3.6 GPM, 1 shower at 2 GPM; in winter, at a 70°F rise, about 2.3 GPM, 1 shower at 2 GPM. Size it to your fixtures.
At 240 volts 24 kW is about 100 amps. The maker calls for three 40 Amp double-pole breakers. The requirement calculator shows it at 208 V too; an electrician confirms the panel.
No flue, no gas line and a compact box on the wall; the trade-off is that a cold winter inlet cuts its flow sharply.
From the listing: features: On-demand heating, Digital control panel; connections: 3/4 in. NPT; material: Stainless Steel; model: CMXTEPA0024.
The listing gives a weight of 0.27 g.
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
- 24 kW
- Up to 4.6 GPM
- No venting or gas line
- Breakers stated by the maker
Trade-offs
- Draws about 100 A
- Flow drops with cold inlet water
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 | CMXTEPA0024 | Retailer |
|---|---|---|
| Features (seller) | On-demand heating, Digital control panel | Retailer |
| Power | 24 kW | Retailer |
| Voltage | 240 V | Retailer |
| Max flow (maker) | 4.6 GPM | Retailer |
| Product weight | 0.27 g | Retailer |
| Material | Stainless Steel | Retailer |
| Breakers (maker) | three 40 Amp double-pole breakers | Retailer |
| Connections | 3/4 in. NPT | Retailer |
Rival units at this flow
More electric tankless water heaters rated for similar demand
Final verdict
A solid whole-house electric tankless for one shower at a time in mild climates.
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