RHEEM Performance Tankless Water Heater RETEX-11
( Brand: Rheem ), ( Manufacturer Part Number: RETEX11 ), ( Type: Tankless Water Heater/boiler ), ( Unit Type: Unit ), ( Water Connection Location: Side ), ( Heating System: Instantaneous ), ( Voltage: 240 V ), ( Color: Gray ), ( Features: Electric ), ( Mounting Location: Indoor ), ( Water Heater Profile: Compact )
Review RHEEM Performance Kw Tankless Hot Water Heater
The Rheem RTEX-11 Performance Plastic Tankless Water Heater is a compact and efficient solution for your hot water needs. This model is part of Rheem's line of residential electric tankless water heaters, which are designed to provide an endless supply of hot water on demand.
Measuring just 17 inches long, 10 inches wide, and 3 inches high, the RTEX-11 is a space-saving option that can be installed on an interior or exterior wall. It's ideal for small homes or apartments, or for supplementing the hot water capacity of a larger home. With a maximum flow rate of 4.5 gallons per minute (GPM) at a 35-degree Fahrenheit temperature rise, it can supply hot water to one or two bathrooms simultaneously.
The RTEX-11 features a digital remote control, which allows you to easily adjust the temperature and other settings from a distance. It also includes a built-in freeze protection mode, which automatically activates when the temperature drops below 32 degrees Fahrenheit, ensuring that the unit remains safe from damage.
This tankless water heater is Energy Star certified, which means it meets strict energy efficiency guidelines set by the U.S. Environmental Protection Agency. It's designed to save energy by only heating water when it's needed, rather than continuously heating and storing it in a tank.
The RTEX-11 is constructed of durable, corrosion-resistant materials, including a copper heat exchanger and a stainless steel burner. It comes with a limited lifetime warranty on the heat exchanger and a 5-year limited warranty on parts, giving you peace of mind and protection against manufacturing defects.
Installation of the RTEX-11 is relatively simple, as it requires no venting and can be connected to standard 1/2-inch copper or PEX water lines. However, it's recommended that you have a qualified plumber install and connect the unit to your electrical system to ensure safe and proper operation.
Overall, the Rheem RTEX-11 Performance Plastic Tankless Water Heater is a reliable and efficient option for those looking to upgrade their hot water system. Its compact size, digital remote control, and energy-saving design make it an excellent choice for small homes or as a supplemental water heater for larger homes.
The Rheem RTEX-11 Electric Tankless Water Heater is a popular choice for those seeking to reduce their water heating costs and save space. Here are the pros and cons of buying this particular model:
Pros:1. Energy Efficiency: Tankless water heaters, in general, are more energy-efficient than traditional storage-tank water heaters since they heat water only when it is needed. The RTEX-11 model is ENERGY STAR certified, which ensures it meets specific energy efficiency guidelines.
2. Space Savings: This model is compact and can be installed on a wall, freeing up valuable floor space.
3. Continuous Hot Water: Since the water is heated on-demand, there is no waiting for a tank to fill and heat up. This results in a consistent supply of hot water.
4. Longer Lifespan: Tankless water heaters typically have a longer lifespan than traditional storage-tank water heaters due to fewer moving parts and less wear and tear.
5. Remote Controller: The RTEX-11 comes with a digital remote control, allowing users to easily adjust temperature settings and diagnose issues.
Cons:1. Higher Upfront Cost: Tankless water heaters, including the RTEX-11, have a higher upfront cost compared to traditional storage-tank water heaters. However, the long-term energy savings can offset the initial investment.
2. Potential for Cold Water Sandwich: If there is high demand for hot water in a household (such as multiple showers being used at once), the water heater may not be able to keep up, resulting in a "cold water sandwich" a brief moment of cold water in between hot water streams.
3. Electricity Requirements: The RTEX-11 is electric, so it requires a dedicated 220-volt circuit and may require professional installation. This could add to the overall cost.
4. Limited Flow Rate: The flow rate of this model is relatively low, making it unsuitable for households with a high demand for hot water or large homes with multiple bathrooms.
In conclusion, the Rheem RTEX-11 Electric Tankless Water Heater is an energy-efficient and space-saving option for those looking to reduce their water heating costs. Its pros outweigh the cons, but it's essential to consider the specific needs of your household before making a purchase.
Recommendation:If you have a smaller household and are looking for energy savings and space efficiency, the Rheem RTEX-11 Electric Tankless Water Heater is an excellent choice. However, if you have a larger household with a high demand for hot water, you may want to consider a natural gas tankless water heater or a high-flow electric model. Additionally, it's crucial to ensure that your electrical system can support the installation of a 220-volt circuit.
Details:
Missing the knob, accessories and manual. Easy to adjust: electronic temperature control adjustable in 1-degree increments from 80-140 degrees F with easy-to-read display Celsius and Fahrenheit compatible. Energy and cost savings: heats water only when it is needed for savings of up to 50% on heating costs used in a point-of-use application. Easy to maintain: durable, easy-to-replace heating elements.
A reliable hot water solution from Rheem, the global leader in heating. Easy installation: compatible with 1/2 in. Rheem Performance 11 kW Tankless Hot Water Heater, RETEX-11 - Used. This is the heater only.
Space savings: small, compact design fits perfectly in tight places like under cabinets and sinks. Great investment and value: energy cost savings a five-year heat exchange one-year parts limited warranty.
part #: retex11 prices
- $55.99-$199.00
specifications wateheat:
- brand: Rheem
- mpn: Retex11
- type: Tankless Water Heater/boiler
- unit type: Unit
- water connection location: Side
- heating system: Instantaneous
- voltage: 240 V
- color: Gray
- features: Electric
- mounting location: Indoor
- water heater profile: Compact
seller wateheat:
- rating: 99.2%
- # reviews: 1412
- city: Gilbert, Arizona
offer wateheat:
- availability: In Stock
- options: Ship-to-home
- quantity: 1
- best offers: True
- started: April 2, 2026
- sold: 0
payments wateheat:
- other
- wallet: Google-pay
- credit card: Discover
general wateheat:
- Heating, Cooling Air > Water Heaters > Tankless Water Heaters
- condition: Used
shipping wateheat:
- class: Economy
- transit: 5-11 Days
- cost: $0.00
- service: FedEx Ground Economy
- carrier: FedEx
- type: Calculated
returns wateheat:
- policy: No Returns
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