Tankless water heaters are revolutionizing the way we access hot water in our homes, offering energy efficiency and endless supply. In 2025, the market is filled with top contenders that cater to various needs, from compact models perfect for small spaces to powerful units designed for larger households. These innovative systems not only save space but also reduce energy costs, making them a smart investment for any homeowner. With advanced technology and user-friendly features, the best tankless water heaters are setting new standards for performance and reliability.

SALE −$91.24

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.Amperage Draw : 54 A.Special Features: ‎Energy Efficient
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

$207.76

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SALE −$20.53

Rheem 18kW 240V Tankless Electric Water Heater, Gray

External digital thermostatic control with LED display (+/1 degree accuracy)
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
Simple installation – bottom 3/4 inch NPT water connections
Threaded for easy replacement, simple installation, digital temperature display

$428.47

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SALE −$153.79

NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU

One Model, Anywhere: This Rinnai tankless water heater is installable indoors or outdoors thanks to our new Versa Vent and powered by either propane or natural gas thanks to a Smart Sense gas control system; RX-OVC vent cap required for outdoor install
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This condensing propane and natural gas tankless water heater from Rinnai is only the size of a small suitcase, but provides up to 11.1 GPM (7 fixtures at once)
Smart, Efficient Design: This water heater's modern design includes an easy-to-use interface, Quick Flush feature for simplified flushing, as well as a super-high energy efficiency factor of UEF .98; See Controlr module for WiFi control (not included)
Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to find a qualified technician to install your tankless water heater, and use the Rinnai Central App for help with setup, service & troubleshooting; 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 size for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region

$1,384.11

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Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

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
Bottom 3/4" NPT water connections
On demand, consistent and continuous hot water

Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY

External adjustable digital thermostatic control with LED display (+/1 degree accuracy
Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
Simple installation – 1/2 NPT adapters included; side 1/2 inch Compression water connections
99.8% energy efficient. External controls to adjust temperature in increments of 1°f. Water-Saver Shower Head – 1.5 GPM
Threaded for easy replacement, simple installation, digital temperature display 54 A. 13kW Model Flow Rate: up to 3.17 GPM

$282.95

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Titan Electric Tankless Water Heater

Tankless Water Heater
220 V
54 Max Amps

$243.00

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Rinnai V53DeP Propane Tankless Water Heater, 5.3 GPM, Outdoor Installation

Endless Hot Water For Every Need: Enjoy the convenience of our tankless hot water heater with a 5.3 GPM flow rate, delivering unlimited hot water to multiple appliances for your busy household
Energy-Efficient Performance: Our propane tankless water heater conserves energy by heating water on demand, ensuring you use energy only when needed while enhancing the unit's lifespan with improved scale detection features
Optimal Space-Saving Design: The compact design of this outdoor propane water heater allows for installation in tight spaces while providing powerful and consistent hot water flow, perfect for families and individuals alike
Professional Installation Recommended: Ensure seamless performance and longevity by having a qualified technician install your Rinnai tankless water heater, offering peace of mind and adherence to safety standards
Reliable Warranty Protection: Backed by a robust warranty, our Rinnai water heater includes a 10-year warranty on the heat exchanger, a 5-year warranty on labor, and a 1-year warranty on parts, confirming our commitment to quality

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Generic Tankless Water Heater Electric, Instant Hot Water Heater Under Sink, 3000W 110V On Demand Mini Water Heater for RV Kitchen Bathroom, White

With 3000W power, the water heater can raise the water by 45° F(0.3GPM) /27° F(0.5GPM) in seconds. You can adjust the water flow to meet your outlet temperature requirement. The Larger water flow, the lower outlet temperature; The smaller water flow, the higher outlet temperature. Not Suitable for Shower(Shower normally requires at least 1.8 gpm). You can set Fahrenheit or Celsius degrees by holding power button for 6 seconds.
IMPORTANCE before purchase: 3000W at 110V draw max 27A, Required breaker 31AMP, Wire gauge 10AWG, Water connection G1/2.
Premium material: 304 stainless steel lining, 316L stainless steel heating pipe, sturdy ABS shell, uni-corrosion brass interface. IPX4 waterproof, dry burning protection, leakage protection, and overheating protection upgrade safety level
Automatic standby mode ensures that you enjoy heated water at any time. One-touch operation provides convenience.
This mini water heater is ideal for limited spaces such as kitchens, apartments, bathrooms, RVs. Not Suitable for Shower(Shower normally requires at least 1.8 gpm)

$51.99

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