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Table of Contents
- 1 Best Under Sink Hot Water Heater Reviews
- 2 Offers and Discounts
- 3 Cheap Under Sink Hot Water Heater
- 4 Buy Under Sink Hot Water Heater Online
- 4.1 EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
- 4.2 EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW - Quantity 1, 17 x 17 x 3.5
- 4.3 EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology
- 4.4 Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater
- 4.5 EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW - Quantity 1, 12 x 8 x 4
- 4.6 Ecosmart POU 6 Point of Use Electric Tankless Water Heater, 6 KW,White,1/20, 1/40, 1/95
- 4.7 Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, 17 x 17 x 3.5
- 4.8 Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt, 6 x 11 x 3 Inch
- 4.9 Rinnai RL94IN Tankless Hot Water Heater, 9.8 GPM, Natural Gas, Indoor Installation
- 4.10 Rinnai RL75IN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Indoor Installation
- 5 Best Under Sink Hot Water Heater 2024
Best Under Sink Hot Water Heater Reviews
TOP CHOICE
EcoSmart
EcoSmart
GOOD PRICE QUALITY RATIO
EcoSmart
- 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
- 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
- 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.
- 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
- 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 17 x 17 x 3.75 inches
- 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 up to 50% in water heating costs according to the Department of Energy
- EcoSmart ECO 27 Sizing; Refer to the sizing map. Requires 3x40 AMP Double Pole Breaker, 27-kilowatt tankless electric water heater ideal for providing hot water for whole home applications; provides between 2.7 and 6.5 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution
- Warranty and Certifications; Limited Lifetime Warranty on electronics, exchanger and element; UL-499 certified; ETL Listed
- Required Breaker Quantity: Three 40 Amp Double Pole
- The product is highly durable
- The product is easy to use
- Manufactured in China
- Amperage (amps): 75. Activation flow: 0. 3 GPM. Flow Rate @ 35 F Rise (gallons/min): 3. 51 gal (US)/min
- The product works and is compatible with 2 X 40 AMP (DP) breakers and 2 X 8 AWG wire
- Lifetime warranty for residential use
TOP CHOICE
EcoSmart
Score
- 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
- 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
- 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.
- 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
EcoSmart
Score
- 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
- 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 17 x 17 x 3.75 inches
- 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 up to 50% in water heating costs according to the Department of Energy
- EcoSmart ECO 27 Sizing; Refer to the sizing map. Requires 3x40 AMP Double Pole Breaker, 27-kilowatt tankless electric water heater ideal for providing hot water for whole home applications; provides between 2.7 and 6.5 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution
- Warranty and Certifications; Limited Lifetime Warranty on electronics, exchanger and element; UL-499 certified; ETL Listed
- Required Breaker Quantity: Three 40 Amp Double Pole
GOOD PRICE QUALITY RATIO
EcoSmart
Score
-
- The product is highly durable
- The product is easy to use
- Manufactured in China
- Amperage (amps): 75. Activation flow: 0. 3 GPM. Flow Rate @ 35 F Rise (gallons/min): 3. 51 gal (US)/min
- The product works and is compatible with 2 X 40 AMP (DP) breakers and 2 X 8 AWG wire
- Lifetime warranty for residential use
Offers and Discounts
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Cheap Under Sink Hot Water Heater
The cheapest options among the top 10:
Buy Under Sink Hot Water Heater Online
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
- 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
- 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
- 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.
- 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
EcoSmart ECO 27 Tankless Water Heater, Electric, 27-kW - Quantity 1, 17 x 17 x 3.5
- 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
- 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 17 x 17 x 3.75 inches
- 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 up to 50% in water heating costs according to the Department of Energy
- EcoSmart ECO 27 Sizing; Refer to the sizing map. Requires 3x40 AMP Double Pole Breaker, 27-kilowatt tankless electric water heater ideal for providing hot water for whole home applications; provides between 2.7 and 6.5 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution
- Warranty and Certifications; Limited Lifetime Warranty on electronics, exchanger and element; UL-499 certified; ETL Listed
- Required Breaker Quantity: Three 40 Amp Double Pole
EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology
- The product is highly durable
- The product is easy to use
- Manufactured in China
- Amperage (amps): 75. Activation flow: 0. 3 GPM. Flow Rate @ 35 F Rise (gallons/min): 3. 51 gal (US)/min
- The product works and is compatible with 2 X 40 AMP (DP) breakers and 2 X 8 AWG wire
- Lifetime warranty for residential use
Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater
- Sleek and compact design with digital output temperature display
- ECOSMART tankless water heaters are 99.8-percent energy efficient
- Manufactured in United States
- Pipe Fittings:3/4 inch NPT
- Required Breaker:4 x 40 A
- 150 A
EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW - Quantity 1, 12 x 8 x 4
- The product is highly durable
- The product is easy to use
- Manufactured in China
- Heating elements are durable and are threaded for easy replacement
- Activation Flow - 0.3 GPM
Ecosmart POU 6 Point of Use Electric Tankless Water Heater, 6 KW,White,1/20, 1/40, 1/95
- Can provide hot water for one sink at 0.5 GPM in warmer climates
- Requires 1 x 30 amp breaker and 10 AWG wire
- For one sink at 0.5 GPM in colder climates the POU 6 is recommended
- This product is recommended for use with a single sink only. Do not use with a shower or multiple fixtures.
- This unit operates at 220 volts and one should not use a plug while installing. This product is hard wired
Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, 17 x 17 x 3.5
- Lifetime warranty
- Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
- Never run out of hot water with an ECOSMART tankless water heater
- Patented Self Modulating Technology and design.Activation flow 0.3 GPM
- ECOSMART tankless water heaters are 99.8-percent energy efficient
- 100 A
Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt, 6 x 11 x 3 Inch
- Can provide hot water for one sink at 0.5 GPM in warmer climates
- Requires 1 x 30 amp breaker and 10 AWG wire
- For one sink at 0.5 GPM in colder climates the POU 6 is recommended
- Amperage Draw 29 amp. kW - 3.5 kW
- Connection Fittings 1/2" NPT
- Max temperature rise @ .5 GMP is 47.8°F Max temperature rise @ 1GPM is 23.9°F Max temperature rise @ 1.5 GPM is 15.9°F
Rinnai RL94IN Tankless Hot Water Heater, 9.8 GPM, Natural Gas, Indoor Installation
- Original Design: Tankless hot water heater's Circ-Logic technology offers recirculation patterns that match your habits; For the latest in non-condensing technology that speeds up service and installation, check out our new RE180iN model
- Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 9.8 GPM (6 fixtures at once)
- Smart, Durable Design: Includes 12-, 5-, and 1-year residential guarantee and 5-, 5-, and 1-year commercial factory warranty for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
- Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
- Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
Rinnai RL75IN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Indoor Installation
- Original Design: Tankless hot water heater's Circ-Logic technology offers recirculation patterns that match your habits; For the latest in non-condensing technology that speeds up service and installation, check out our new RE160iN model
- Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase and fits in a wide variety of spaces, but provides up to 7.5 GPM (5 fixtures at once)
- Smart, Durable Design: Includes 12-, 5-, and 1-year residential guarantee and 5-, 5-, and 1-year commercial factory warranty for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
- Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
- Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
After seeing the best Under Sink Hot Water Heater 2023 lets look into the future:
Best Under Sink Hot Water Heater 2024
These are the new Under Sink Hot Water Heater releases available. Will the best Under Sink Hot Water Heater 2024 be among them?
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Last update 2021-09-03. Price and product availability may change.