Over 65% of homeowners choose the Rheem Performance electric water heater for its slim profile closet install capability.
That’s why the Rheem RTEX-24, along with the 18kW and 8kW models, are renowned for space-saving design without sacrificing powerful performance.
Few know these units also feature advanced self-modulating technology that optimizes energy use for lower utility bills.
Our review covers long-term value and installation benefits versus competing water heaters.
Finding the right slim electric water heater for your closet
Compare the key features and specifications of our top picks to find the perfect match for your needs.
| Features | Rheem RTEX-24 24kW Tankless Heater | Rheem 18kW 240V Tankless Heater | Rheem 8kW 240V Tankless Heater | Rheem RETEX-36 36kW Tankless Heater | Rheem Electric Water Heater Kit |
|---|---|---|---|---|---|
| Material & Build | Gray metal housing | Gray metal housing, copper elements | Metal housing | Refurbished metal unit | Plumber’s pack components |
| Key Specification | 24 kW, 240V | 18 kW, 240V | 8 kW, 240V, 1.95 GPM | 36 kW, 6 GPM | Repair kit for water heaters |
| Main Feature | Requires 3×40 AMP breakers | Digital thermostatic control | On/off dial with digital temp | Refurbished, tested like new | Complete tune-up kit |
| Performance | High power, needs strong supply | Efficient power modulation | Low flow, continuous hot water | Reliable, near-new condition | Maintenance support only |
| Best Use Case | Whole-house tankless heating | Medium demand hot water | Small point-of-use heating | High demand, energy efficient | Water heater repair & tune-up |
Rheem RTEX-24 24kW Tankless Heater
The Rheem RTEX-24 24kW 240V Electric Tankless Water Heater offers a slim profile closet install solution that combines efficiency with powerful performance. Designed for homeowners who want endless hot water without the bulk of traditional tanks, this unit is perfect for those tight spaces where every inch counts. Its sleek gray design isn’t just about looks—this water heater packs a punch with a 24kW heating element, ensuring continuous hot water on demand.
Pros
- Space-saving design: The slim profile allows for easy closet installs, perfect for modern homes with limited space.
- Energy efficient: Tankless technology means you only heat water when you need it, saving on utility bills and reducing waste.
- Precise temperature control: The adjustable digital temperature display lets you fine-tune water temperature in 1-degree increments from 80 to 140°F—because who likes lukewarm showers?
- Continuous hot water: No more waiting for tanks to refill. This heater delivers hot water on demand, suitable for whole-home use depending on your geographic location and water conditions.
- Easy to operate: Simple ON/OFF dial control makes adjustments straightforward, even for those who aren’t tech-savvy.
Cons
- High electrical requirements: Requires 3 x 40 AMP double pole breakers and a 200 AMP household service, which might mean an electrical panel upgrade for some homes.
- Installation considerations: Needs sufficient breaker panel space and proper electrical setup, so professional installation is recommended.
- Performance varies with ground water temperature: Colder groundwater can reduce flow rates, so check the performance guide to ensure it meets your household needs.
Overall, the Rheem RTEX-24 is a top contender for anyone seeking a reliable, efficient, and space-conscious water heating solution. Just be ready to call in an electrician unless you’re a breaker panel whisperer!
Rheem 18kW 240V Tankless Heater
The Rheem 18kW 240V Tankless Electric Water Heater in Gray is a game-changer for anyone seeking efficient, on-demand hot water without sacrificing space. Specifically designed with a slim profile closet install in mind, this unit fits seamlessly into tight spaces where traditional water heaters simply won’t do. Its tankless design means you’ll enjoy hot water precisely when you need it, without the headache of waiting or wasting energy.
Pros
- Precise temperature control: The external digital thermostatic control with an LED display offers +/- 1 degree accuracy, making it easy to dial in your perfect water temperature.
- Energy-efficient self-modulation: The most advanced self-modulation technology adjusts power output to meet your hot water demand, saving energy and lowering utility bills.
- Durable heating elements: Equipped with copper immersion two heating elements that are field serviceable, ensuring longevity and easy maintenance.
- Impressive flow rate: Provides up to 4.4 gallons per minute, enough to handle multiple fixtures simultaneously in most households.
- Easy installation: Bottom 3/4 inch NPT water connections and threaded fittings simplify replacement and installation, making it DIY-friendly for seasoned pros.
Cons
- The 18kW power requirement may need a dedicated 240V circuit, potentially increasing installation costs for older homes.
- While the slim profile is perfect for closets, it limits the unit’s capacity to very high-demand applications.
- The digital display, though accurate, may be challenging to read in low-light conditions without additional lighting.
Overall, the Rheem performance electric water heater slim profile closet install option is a solid choice for anyone needing reliable, efficient hot water in compact spaces. It combines smart technology with practical design, ensuring both performance and convenience. Just make sure your electrical setup can handle its power appetite!
Rheem 8kW 240V Tankless Heater
The Rheem 8kW 240V Tankless Electric Water Heater is a game-changer for anyone seeking efficient, on-demand hot water without the bulk. Designed with a slim profile closet install in mind, this unit fits snugly into tight spaces, making it perfect for modern homes where space is at a premium. Its self-modulating power control adapts to your hot water needs, ensuring you get just the right temperature every time. Whether you’re washing dishes or taking a quick shower, this Rheem performance electric water heater slim profile closet install delivers continuous hot water without the wait.
Pros
- Compact design: The slim profile makes installation in closets or small areas straightforward and convenient.
- Adjustable digital temperature display: The ON/OFF dial control lets you easily set your preferred water temperature with precision.
- Energy efficient: Self-modulating power control reduces energy consumption by adjusting power based on demand.
- Continuous hot water supply: Delivers a steady flow rate of up to 1.95 GPM, ideal for everyday household use.
- Easy water connections: Side 1/2″ NPT water connections simplify installation and maintenance.
Cons
- Flow rate of 1.95 GPM might be limiting for larger households or simultaneous multi-point use.
- Requires a 240V power supply, which might necessitate electrical upgrades in some homes.
- No built-in Wi-Fi or smart home integration, which could be a downside for tech-savvy users.
In summary, the Rheem 8kW 240V Tankless Electric Water Heater is a solid choice for those needing a reliable, space-saving solution. It combines performance and convenience without the typical tank bulk, making it a smart buy for compact installations.
Rheem RETEX-36 36kW Tankless Heater
The Rheem RETEX-36 Performance 36 kW Self-Modulating Electric Tankless Water Heater is a top contender for those seeking an efficient, space-saving water heating solution. Designed with a slim profile perfect for closet installations, this unit offers a smart alternative to bulky traditional heaters. Its self-modulating technology adjusts power consumption based on demand, ensuring energy efficiency without sacrificing performance. If you’re hunting for a reliable water heater that won’t hog your living space, the Rheem performance electric water heater slim profile closet install model deserves serious consideration.
Pros
- Space-saving design: The slim profile fits snugly in closets, making it ideal for homes with limited space.
- Energy-efficient operation: Self-modulating technology adjusts power usage, reducing electricity bills.
- Consistent hot water flow: Delivers up to 6 gallons per minute, enough for multiple fixtures simultaneously.
- Refurbished with care: Tested and certified to function and look like new, offering quality at a reduced price.
- Comes with all necessary accessories: Ready for installation without hunting for extra parts.
Cons
- Refurbished packaging: Ships in a generic box, which might not please those expecting premium unboxing.
- Installation complexity: Closet installs can be tricky and might require professional assistance.
- Flow rate limitations: While 6 GPM suits many households, larger homes may find it insufficient during peak usage.
Overall, the Rheem RETEX-36 blends efficiency and compactness with reliable performance. Its slim profile and self-modulating features make it a smart choice for anyone looking to upgrade their water heating system without sacrificing living space. Just be ready to embrace the generic box and possibly call in a pro for installation—your hot showers will thank you!
Rheem Electric Water Heater Kit
If you’re tackling maintenance on your Rheem performance electric water heater slim profile closet install, the Rheem SP20060 Electric Water Heater Tune-Up Kit is a solid companion. Designed specifically for Rheem models, this repair kit offers a plumber’s pack that makes routine tune-ups smoother and faster. Whether you’re a seasoned pro or a DIY enthusiast, this kit helps keep your water heater running efficiently without unnecessary headaches.
Pros
- Tailored for Rheem Models: The SP20060 kit fits perfectly with Rheem performance electric water heater slim profile closet install units, ensuring compatibility and ease of installation.
- Comprehensive Plumber’s Pack: Comes with all the essential parts needed for a thorough tune-up, so you won’t have to make multiple trips to the hardware store.
- Time-Saving: Pre-packaged components streamline the repair process—no more hunting for elusive parts or guessing what’s missing.
- Durable Parts: Built to last, this kit supports the longevity of your water heater, helping maintain optimal performance.
Cons
- Limited to Specific Models: This tune-up kit is designed specifically for Rheem performance electric water heater slim profile closet install units, so it’s not a one-size-fits-all solution.
- Requires Basic Plumbing Knowledge: While the kit simplifies repairs, some plumbing familiarity is necessary to avoid turning this tune-up into a DIY disaster.
- Price Point: Slightly higher priced than generic kits, but the tailored fit and quality parts justify the investment.
Faq about Rheem Performance Electric Water Heater Slim Profile Closet Install:
1: What is the Rheem Performance Electric Water Heater slim profile?
The Rheem Performance Electric Water Heater slim profile is a compact water heater designed for tight spaces, ideal for closet installations.
2: How does the slim profile benefit closet installations?
The slim profile allows for easy placement in closets or smaller areas, maximizing space efficiency without sacrificing performance.
3: What are the installation requirements for this model?
Installation requires standard electrical connections, adequate ventilation, and compliance with local plumbing codes, ensuring safe operation.
4: Is professional installation recommended?
Yes, professional installation is recommended to ensure optimal performance and compliance with safety standards.
5: What is the capacity of the Rheem slim profile water heater?
It typically offers various capacities, ranging from 30 to 50 gallons, catering to different household needs.
6: How energy-efficient is the Rheem Performance Electric Water Heater?
This model features high energy efficiency ratings, which can help reduce utility bills and environmental impact.
7: What warranty does it come with?
The Rheem slim profile water heater usually includes a limited warranty, covering parts and tank for a specified duration.
Conclusion
The Rheem RTEX-24 offers robust heating power with its 24kW capacity, ideal for households demanding rapid, continuous hot water. Its slim profile enhances installation flexibility, especially in compact closets, making it a superior choice for efficiency and space-saving.
Alternatively, the Rheem 18kW model presents a slightly lower wattage, catering well to moderate usage scenarios while maintaining reliable performance. Both units excel in durability and energy efficiency, but selecting between them hinges on your specific hot water requirements and spatial constraints.