Rheem RTEX-13 Residential Tankless Water Heater: External adjustable digital thermostatic control
Let me tell you about the Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater—because who doesn’t love a gadget that promises endless hot water without hogging your closet space? This little powerhouse delivers hot water on tap, whether you’re washing dishes or pretending your shower is a tropical waterfall. And with its external adjustable digital thermostatic control (complete with a snazzy LED display), you can tweak the temperature down to the exact degree. No more guessing games with the faucet.
Inside, it’s packing durable copper immersion heating elements that are not just tough but also field serviceable—because things happen, and Rheem gets it. The self-modulating power control is like having a smart assistant that adjusts energy use based on how much hot water you’re actually using. Translation: efficiency that doesn’t make you feel guilty. Plus, with 1/2 NPT adapters and side compression water connections included, installation is less of a headache and more of a 'why didn’t I do this sooner?' moment. If you’re into saving space, cutting energy bills, and never running out of hot water, this tankless heater is basically your home’s new best friend.
Features
- Durable Copper immersion heating elements
- Simple installation with included adapters
- 99.8% energy efficient
- Self-modulating power control
- External adjustable digital thermostatic control
General specs
- Brand: Rheem
- Model: RTEX-13
- Seller: Retailer
- ID: B01NAUZJPE
- style: Heater
- Voltage: 240 Volts
- Wattage: 13 KW
- Thickness: 1 Inches
- efficiency: at least 99.8% energy efficient
- Item Depth: 0.5 inches
- Heat Output: 13 Kilowatts
- Is Electric: Yes
- Item Weight: 3.96 pounds
- Mounting Type: Wall
- Special Feature: LED Display
- Maximum Flow Rate: 4.8 Gallons Per Minute
- Product Dimensions: 1"W x 1"H
- Included Components: Rheem RTEX-13 Residential Tankless Water Heater
- Maximum Temperature: 1.4E+2 Degrees Fahrenheit
- First listed by seller: August 5, 2025
If you are interested in more details, you can find full information on the seller's page.
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| Brand | Rheem | Rheem | HNK | Rheem | Rinnai | |
| Model | RTEX-13 | RTEX-18 | D3548A11 | RTEX-24 | RX180iN | |
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| Price | €248.68 | €380.24 | €104.00 | €456.28 | €43.48 | €1,369.37 |
| Seller | Retailer | Retailer | Retailer | Retailer | Banggood | Retailer |
| Update | May 15, 2026 | May 17, 2026 | Mar 21, 2026 | Mar 21, 2026 | May 9, 2026 | May 18, 2026 |
| Voltage | 240 Volts | 240 Volts | 110 Volts | 240 Volts | 120 Volts | |
| Wattage | 13 KW | 18000 watts | 3500 watts | 24 KW | 76 watts | |
| efficiency | at least 99.8% energy efficient | 99.8% | 99.8% Energy efficient | High (0.98 UEF) | ||
| Heat Output | 13 Kilowatts | 18 Kilowatts | 24 Kilowatts | 180000 British Thermal Units | ||
| Is Electric | Yes | Yes | Yes | No | ||
| Item Weight | 3.96 pounds | 14.78 pounds | 4.29 pounds | 17.8 pounds | 54 pounds | |
| Mounting Type | Wall | Wall | Wall | Wall | Wall | |
| Special Feature | LED Display | Temperature Lock, Dry Combustion Protection, Overheat Protection, LED Display, Low Water Flow Protection | LED Display | |||
| Maximum Flow Rate | 4.8 Gallons Per Minute | 4.4 Gallons Per Minute | 1.9 Liters Per Minute | 5.9 Gallons Per Minute | 10 Gallons Per Minute | |
| Product Dimensions | 1"W x 1"H | 9.13"W x 7.59"H | 17.63"W x 18.25"H | 19"W x 31"H | ||
| Included Components | Rheem RTEX-13 Residential Tankless Water Heater | tankless electric water heater | Fittings, Aerators | mount | ||
| Maximum Temperature | 1.4E+2 Degrees Fahrenheit | 140 Degrees Fahrenheit | 131 Degrees Fahrenheit | 140 Degrees Fahrenheit | ||
| Maximum Operating Pressure | 6 Bars | 150 | 150 Pound per Square Inch | |||
Rheem RTEX-13 External adjustable digital thermostatic control
€248.68
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