As an Amazon Associate I earn from qualifying purchases.
Incoloy elements for a long-lasting unit. Easy-to-use plastic drain valve for maintenance. Durability: two magnesium anode rods for extra tank protection. Warranty: 10-year tank and parts limited warranty. Fully-automatic surface mount thermostats.




Amps 12a, volts VAC 120 Independent installation: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source. Convenient hot water heater: 2. 5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it.

You turn on the faucet and the water is freezing cold. Important note: in order to install 18kw electric tankless water heater it requires 240 Voltage, 2 x 40 AMP Circuit Breaker Size and a set of 2 x 8AWG/2 wires.
Save space: that water heater in the basement or utility closet takes up a ton of space. Too bad you don’t have an airthereal electric Tankless Water to provide endless hot water on demand with no preheating, temperature fluctuations, or running out of hot water in the tank. Endless hot water: imagine you are the last one in your family to take a shower before heading out for the day. This wall-mounted water heater uses 90% less space than a traditional hot water heater with a tank.



Save space; ecosmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11. 5 x 8 x 3. 75 inches. Ecosmart eco 11 sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.
3 and 3. 1 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution. Endless on-demand hot water; consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature.

Continuous flow – advanced flow control patented technology invented by Stiebel Eltron, automatically maintains water temperature for constant comfort. Tempra 24 plus – this specific model is 24kw, and offers an output water temperature of 68° to 140°F.
It’ll reduce flow slightly if hot water demand exceeds capacity. Eco friendly unit saves energy with auto-modulation and the ability to electronically control water flow. Warranties included – stiebel eltron’s top-rated electric tankless water heaters perform with the highest standards for comfort and reliability. Savings monitor even shows how much you save on energy costs. Hot showers will never be interrupted again.
1. Bosch Thermotechnology
#ad
Bosch Thermotechnology 50-Gallon Standard Electric Storage Water Heater Tronic 5000T
#adBosch Thermotechnology #ad - Application: dimensions : 22. 25" w x 48. 75" h x 22. 25" lperfect size for a maintenance closet, access closet under the stairs, crawl space. Dielectric heat trap. Double heating elements conserve energy.Incoloy elements for a long-lasting unit. Easy-to-use plastic drain valve for maintenance. Durability: two magnesium anode rods for extra tank protection. Warranty: 10-year tank and parts limited warranty. Fully-automatic surface mount thermostats.
More information #ad
Glass-lined steel tank to help prevent corrosion. Efficiency: hfo foam insulated, reducing fuel costs and increasing energy efficiency. Temperature and pressure relief valve included. Convenience: factory-installed electric hot and cold water connections for extended tank life. Heavy gauges steel tank for extra years of trouble-free service. Factory-installed heat traps reduce heat loss. Ideal for replacement projects.Brand | Bosch Thermotechnology #ad |
Manufacturer | Bosch Thermotechnology #ad |
Height | 48.75 Inches |
Length | 22.25 Inches |
Weight | 115.7 Pounds |
Width | 22.25 Inches |
Part Number | 7738007320 |
Model | 7738007320 |
Warranty | 10 years. |
More information #ad
2. SmartJacket
#ad
Satisfaction Guaranteed, Water Heater Blanket Insulation, Energy Star Certified, "NON FIBERGLASS", Fits up to 80 Gallons
#adSmartJacket #ad - Easy to install and easy to Clean, Contains no Fiberglass, Non toxic / Non carcinogenic. Save money, energy and help the environment!!! save 2x more with OUR PRODUCT!!! 5MM THICKNESS!!! R-value 7.More information #ad
1!!! reduce heat loss by 40% !!! recover your investment in a few month!!! Fits all 20 to 80 gallon tanks / Fits Gas or Electric Water Heater.Brand | SmartJacket #ad |
Manufacturer | IMP #ad |
Model | SJ-80 |
More information #ad
3. Rheem
#ad
Gray, Rheem RTEX-24 24kW 240V Electric Tankless Water Heater
#adRheem #ad - Bottom 3/4" nPT water connections. On/off dial control with adjustable digital temperature display. Self-modulating power control. 24kw model flow rate: up to 5. 9 gpm for rtex-24. On demand, consistent and continuous hot water.More information #ad
Brand | Rheem #ad |
Manufacturer | Rheem #ad |
Height | 3.5 Inches |
Length | 18.25 Inches |
Weight | 17.8 Pounds |
Width | 14.5 Inches |
Part Number | RTEX-24 |
Model | RTEX-24 |
More information #ad
4. Rheem
#ad
Rheem 18kW 240V Tankless Electric Water Heater
#adRheem #ad - External digital thermostatic control with LED display +/1 degree accuracy. Simple installation – bottom 3/4 inch NPT water connections. Threaded for easy replacement, simple installation, digital temperature display.More information #ad
Most advanced self-modulation, adjust power to meet hot water demand. Durable copper immersion two heating elements, field Serviceable. Flow rate- up to 4. 4 gpm.Brand | Rheem #ad |
Manufacturer | Rheem #ad |
Height | 3.5 Inches |
Length | 18.5 Inches |
Weight | 14.78 Pounds |
Width | 14.5 Inches |
Part Number | RTEX-18 |
Model | RTEX-18 |
More information #ad
5. Bosch Thermotechnology
#ad
Wall or Floor Mounted, Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon ES2.5, Shelf, Eliminate Time for Hot Water
#adBosch Thermotechnology #ad - Dimensions : 13. 75 w x 13. 75 h x 1075 d inches. Fast recovery rate: eliminates long waits for hot water at your sink, get on demand hot water at your every need supplies up to 2 sinks at a time.Amps 12a, volts VAC 120 Independent installation: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source. Convenient hot water heater: 2. 5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it.
More information #ad
Long lasting quality: this electric water heater is easy to maintain and has premium glass-lined material for a long service life. Easily mounted: can be shelf, wall or floor mounted bracket included; simply tap into the cold water line and install the water heater directly at the sink to provide hot water. Thermal efficiency is 98%.Brand | Bosch Thermotechnology #ad |
Manufacturer | BOSCH THERMOTECHNOLOGY #ad |
Height | 13.75 Inches |
Length | 13.75 Inches |
Weight | 15.5 Pounds |
Width | 10.75 Inches |
Part Number | 7738004996 |
Model | 7738004996 |
Warranty | 6 year warranty on unit, 2 year warranty on parts |
More information #ad
6. AIRTHEREAL
#ad
Endless On-Demand Hot Water, 240Volts, Small Enough to Install Anywhere, Self Modulates to Save Energy Use, for 2 Showers, Airthereal Electric Tankless Water Heater 18kW, Evening Tide series
#adAIRTHEREAL #ad - The self-modulating temperature technology only uses energy to heat up water while you are using it to save up to 50% on water heating costs compared to a typical tank water heater. Please check to confirm that your breaker panel meet these specifications. The electric and fluid systems are completely separated to prevent electric leakage and water pipe corrosion.You turn on the faucet and the water is freezing cold. Important note: in order to install 18kw electric tankless water heater it requires 240 Voltage, 2 x 40 AMP Circuit Breaker Size and a set of 2 x 8AWG/2 wires.
More information #ad
Safe to use: with high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe, on-demand hot water to use on your schedule. Save energy: water is only heated when you need it, not stored in a hot water tank. Save space: that water heater in the basement or utility closet takes up a ton of space. Too bad you don’t have an airthereal electric Tankless Water to provide endless hot water on demand with no preheating, temperature fluctuations, or running out of hot water in the tank. Endless hot water: imagine you are the last one in your family to take a shower before heading out for the day. This wall-mounted water heater uses 90% less space than a traditional hot water heater with a tank.
Brand | AIRTHEREAL #ad |
Manufacturer | Airthereal #ad |
Height | 3.43 Inches |
Length | 17.25 Inches |
Width | 12.22 Inches |
Part Number | EVT-18K |
Model | 18kW |
More information #ad
7. Rinnai
#ad
Rinnai V65eN Natural Gas Tankless Hot Water Heater, 6.5 GPM
#adRinnai #ad - Enhanced scale detection lessens possibility of serious, long-term damage to unit. Energy and space efficient: Space-saving design conserves energy as it heats only when necessary. Endless hot water: enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended.More information #ad
Guaranteed to last: 10-, labor, 5-, and parts, and 1-year residential factory warranty for heat exchanger, respectively. Optimal water pressure: high-performance up to 6. 5 gpm hot water flow rate for a powerful, constant stream.Brand | Rinnai #ad |
Manufacturer | Rinnai #ad |
Height | 13 Inches |
Length | 17.5 Inches |
Weight | 47.4 Pounds |
Width | 30 Inches |
Part Number | V65EN |
Model | V65EN |
Warranty | See Manufacturer |
More information #ad
8. A. O. Smith
#ad
A.O. Smith ENS-50 ProMax Short Electric Water Heater, 50 gal
#adA. O. Smith #ad - Dynaclean diffuser dip tube helps reduce lime and sediment buildup while maximizing hot water output; made from long-lasting PEX cross-linked polymer. Coregard anode rode aluminum anode with stainless steel core protects tank against corrosion longer than ordinary steel anodes.More information #ad
Meets all current regulations set forth by the National Appliance Energy Conservation Act NAECA. Durable, tamper-resistant brass drain valve. Permaglas glass coating protects steel tank from corrosion and maximizes tank life.Brand | A. O. Smith #ad |
Manufacturer | Trumbull Industries #ad |
Height | 50 Inches |
Length | 24 Inches |
Width | 24 Inches |
Part Number | ENS-50 |
Model | ENS-50 |
Warranty | 6-year limited tank and parts warranty |
More information #ad
9. EcoSmart
#ad
13KW at 240 Volts with Patented Self Modulating Technology, EcoSmart ECO 11 Electric Tankless Water Heater
#adEcoSmart #ad - Save energy; ecosmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.Save space; ecosmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11. 5 x 8 x 3. 75 inches. Ecosmart eco 11 sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.
More information #ad
3 and 3. 1 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution. Endless on-demand hot water; consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature.
Brand | EcoSmart #ad |
Manufacturer | Ecosmart #ad |
Height | 11.5 Inches |
Length | 3.75 Inches |
Weight | 6.5 Pounds |
Width | 8 Inches |
Part Number | ECO 11 |
Model | ECO 11 |
Warranty | Lifetime warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages. |
More information #ad
10. Stiebel Eltron
#ad
20.2, Eco, Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, White
#adStiebel Eltron #ad - Has a digital temperature display and preset temperature and memory buttons, while the interior solid copper heating system does all the power work. Our 7-year leakage and 3-Year Parts Warranties are included with purchase. Easy operation – electronic switch activates the hot water heater and it’s noise free while in use.Continuous flow – advanced flow control patented technology invented by Stiebel Eltron, automatically maintains water temperature for constant comfort. Tempra 24 plus – this specific model is 24kw, and offers an output water temperature of 68° to 140°F.
More information #ad
Space & energy saver – its small, sleek white design saves space yet still provides endless hot water for your whole house, and no venting is required. Check our guides below to compare features of our various Trend and Plus models, requires a min recommended electric service of 150 A, 240V, each available in different kW levels. It’ll reduce flow slightly if hot water demand exceeds capacity. Eco friendly unit saves energy with auto-modulation and the ability to electronically control water flow. Warranties included – stiebel eltron’s top-rated electric tankless water heaters perform with the highest standards for comfort and reliability. Savings monitor even shows how much you save on energy costs. Hot showers will never be interrupted again.
Brand | Stiebel Eltron #ad |
Manufacturer | Stiebel Eltron #ad |
Height | 14.5 Inches |
Length | 4.63 Inches |
Weight | 1 Pounds |
Width | 16.63 Inches |
Part Number | 239222 |
Model | 239222 |
More information #ad