Rheem 18kW 240V Tankless Electric Water Heater, Gray
Efficient, Space-Saving Warmth
Designed for modern households, this tankless electric water heater offers a seamless solution for maintaining hot water without the bulk of customary storage tanks. Its compact form, 90% smaller than a standard tank, fits effortlessly into tight spaces-think under a sink or in a basement-while delivering consistent, on-demand heat. Whether your running a single shower or managing multiple water outlets, the system adapts to your needs, ensuring you never face a cold water interruption. The innovative design also eliminates the need for venting, simplifying installation and reducing clutter in your home habitat.
Wiht smart self-modulating technology, this unit adjusts its power output in real time to match hot water demand, cutting energy bills by up to 50%.The precision of the digital thermostatic control, featuring +/-1 degree accuracy, lets you fine-tune water temperature with ease, enhancing comfort and efficiency. Durable copper immersion heating elements are built to last, and thier field-serviceable design makes maintenance straightforward. The high flow rate of up to 4.4 GPM ensures robust performance, even during peak usage, making it a reliable choice for both residential and point-of-use scenarios.
Pros
- Space-Saving Design: 90% smaller than a traditional tank, ideal for compact spaces.
- energy Efficiency: Only uses power when hot water is flowing, reducing waste.
- Cost-Effective Operation: Self-modulating tech saves up to 50% on heating bills.
- Easy Installation: Bottom 3/4 inch NPT connections streamline setup.
- Durable Build: Copper heating elements and serviceable components ensure longevity.
- Precise Temperature Control: Digital display with +/-1 degree accuracy for personalized comfort.
Cons
- higher Initial Cost: May require a larger upfront investment compared to tank models.
- Electrical Upgrades: Potential need for enhanced electrical systems depending on usage.
- Flow Rate Limitations: Performance may vary with water pressure and demand.
Feature | highlight |
---|---|
Flow Rate | Up to 4.4 GPM |
Energy Savings | Up to 50% reduction in heating costs |
Installation | Simple setup with NPT connections |
Control | External digital thermostatic LED display |
Size | 90% smaller than a traditional tank |
Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White, 20.2
Whether you're rushing to start your day or need a steady stream of hot water for daily chores,this advanced electric water heater ensures reliable performance without interruption. Its energy-efficient design slashes heating costs by up to 34%, making it a smart choice for households looking to save while maintaining comfort. With German-patented self-modulating technology, it intelligently adjusts power output to match demand, keeping water temperature consistent even during peak usage. The compact, space-saving build fits seamlessly into any setup, eliminating the need for venting and simplifying installation. Plus, its digital temperature controls and memory settings let you customize the perfect warmth for each family member, ensuring smooth transitions between showers, laundry, and dishwashing without waiting.
Engineered with precision and sustainability in mind, this unit combines 99% efficiency with a sleek, modern aesthetic that complements any home. Its ability to deliver uninterrupted hot water for multiple uses-whether it's a morning shower or a boiling pot for dinner-adds convenience to everyday life. The quiet operation and solid copper interior ensure durability and a worry-free experience, while the built-in savings monitor provides transparency on energy cost reductions. Designed for long-term reliability, it's backed by comprehensive warranties that reflect stiebel Eltron's commitment to quality and customer peace of mind.
- Pros
- Energy savings of up to 34% with high efficiency
- Compact design saves space and eliminates venting needs
- Automatic temperature maintenance for consistent comfort
- Safe, adjustable temperature limits to prevent scalding
- Quiet operation and durable solid copper heating system
- 7-year Leakage and 3-Year Parts Warranty included
- Cons
- Requires a high minimum electric service (150 A)
- Higher upfront cost compared to traditional tank systems
- Temperature fluctuations possible during extreme demand
- Limited to 1- showers per hour in certain climates
Feature | Detail |
---|---|
power | 4kW |
Voltage | 40V |
Electric Service | Minimum 150 A |
Temperature Range | 68°-140°F |
Max Temp Limit | Adjustable to 109°F |
Efficiency | 99% energy efficiency |
110V Tankless Water Heater Electric, 3000W Compact Water Heater Under Sink, Conveniently Convertible Between Fahrenheit and Celsius
Experience the convenience of a 3000-watt tankless water heater designed for effortless performance and adaptability. Whether you're adjusting the temperature for a quick shower or a soaking bath, the convertible temperature scale lets you switch between Fahrenheit and Celsius with ease, ensuring precise control tailored to your preference.Its compact design fits seamlessly into modern spaces, eliminating the need for bulky storage while delivering consistent hot water on demand. The simplicity of installation means you can get it up and running in no time, without the hassle of complex wiring or extensive setup.
Powered by electricity, this heater is both energy-efficient and eco-conscious, helping you reduce utility costs while minimizing your environmental impact. Its tankless nature ensures no standby energy loss, making it a smart choice for households looking to conserve resources. The user-friendly interface and intuitive temperature adjustments provide a hassle-free experience, whether you're a DIY enthusiast or rely on professional help. With clear installation guidelines-including a required 32AMP circuit breaker and 1/2"NPT threading-this appliance balances flexibility with reliability, making it a practical solution for both residential and commercial use.
- Pros
- Converts temperature between Fahrenheit and Celsius for personalized monitoring
- Energy-efficient design reduces electricity bills and carbon footprint
- Compact footprint saves space without compromising performance
- Simple installation process with clear technical specifications
- Cons
- Requires specific electrical setup (32AMP circuit breaker, 1/2"NPT thread, 2.5mm² wire)
- May need professional installation for optimal safety and performance
Feature | Detail |
---|---|
Power | 3000W |
Temperature Scale | Fahrenheit / Celsius |
Thread Size | 1/2 "NPT |
Wire Size | 2.5mm² (13AWG) |
Circuit Breaker | ≥32AMP |
Tankless Water Heater Electric, 240v 0-6500W Tankless Hot Water Heater with Led Temperature Display for Bathroom or Kitchen,Instant Heater Electric with Overheating Protection,Heater-White
Smart & Convenient
This advanced tankless water heater delivers instant hot water with its rapid heating technology, eliminating the need to wait for stored reserves. its intuitive design features a continuous aluminum knob and an LED display, allowing effortless adjustment of water temperature within the pleasant range of 95-131°F. The built-in intelligent temperature control system ensures precise regulation, automatically adapting heating power to maintain a steady flow of warm water-perfect for daily routines like showering, handwashing, or cooking. With no bulky storage tank, it saves space while offering efficient performance, making it ideal for small areas or modern spaces where aesthetics matter as much as function.
Versatile & Space-Saving
Designed for flexibility, this compact unit fits seamlessly into bathrooms, kitchens, offices, gyms, and other public spaces without compromising style. Its sleek, minimalist appearance and smooth lines complement contemporary decor, while the wall-mounted setup keeps the floor uncluttered. Whether installed openly or hidden in cabinets for a clean, integrated look, it balances convenience with durability. The 304 stainless steel internal pipes resist mineral buildup, and the corrosion-resistant metal aluminum coating on the heating element ensures long-term reliability. Plus, its lightweight ABS plastic shell provides safety and heat insulation, protecting against accidental burns.
- Pros: Instant hot water delivery, energy-efficient operation, precise temperature control, compact and modern design, durable materials, easy wall installation, 5-7 year lifespan, 24/7 customer support.
- Cons: Higher upfront cost compared to traditional models, limited flow rate for simultaneous use, requires proper electrical setup, may need periodic maintenance, installation complexity for non-professionals.
Feature | Highlight |
---|---|
Power | 6500 watts |
Temperature Range | 95-131°F |
Installation Type | Wall-mounted or cabinet-hidden |
Material | 304 stainless steel, metal aluminum coating, ABS plastic shell |
Service Life | 5-7 years |
Customer Support | 24-hour online assistance & professional service team |
Unlock Your Potential
When evaluating efficiency, safety, and value in tankless water heaters, the key takeaway is that these modern systems offer unmatched convenience and energy savings compared to traditional storage tanks.The Rheem 18kW model delivers reliable high-efficiency heating with a durable 304 stainless steel interior, while the Stiebel Eltron Tempra 24 Plus stands out for its advanced temperature control and eco-friendly design. For smaller spaces, the 110V 3000W unit provides compact, user-friendly performance, and the 240V 0-6500W heater combines smart technology with robust overheating protection. Whether you prioritize power, space, or ease of use, there's a tankless option that fits your needs-without compromising safety or long-term value.

Rheem 18kW 240V Tankless Electric Water heater, Gray
High-efficiency heating with corrosion-resistant 304 stainless steel components and safe, stable operation for year-round use.

Stiebel Eltron Tankless Water Heater - Tempra 24 Plus - Electric, On Demand Hot Water, Eco, white
Smart temperature control, eco-friendly design, and seamless installation for versatile home and commercial use.

110V tankless Water Heater Electric, 3000W Compact Water Heater Under Sink
Space-saving design with dual-unit temperature conversion and easy installation, ideal for small kitchens or bathrooms.