Our Top 10 Recommendations for Best Tankless Water Heaters
Up-to-date pricing and reviews for best tankless water heaters on the market
Bestseller No. 1
Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White
- CONTINUOUS FLOW – Advanced Flow Control German patented technology invented by Stiebel Eltron, automatically maintains water temperature for constant comfort. It’ll reduce flow slightly if hot water demand exceeds capacity. Hot showers will never be interrupted again.
- 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. Eco friendly unit saves energy with auto-modulation and the ability to electronically measure water flow. Savings monitor even shows how much you save on energy costs.
- EASY OPERATION – Electronic flow sensor switches on the powerful solid copper interior heating system of the water heater. It’s noise free while in use and has a digital temperature display and preset temperature memory buttons.
- TEMPRA 24 PLUS – This specific model is 24kW, 240V/208V, requires a min. recommended household electric service of 150 A, and offers an output water temperature of 86˚ to 140˚F. Check our guides below to compare features of our various Trend and Plus models, each available in different kW levels.
- WARRANTIES INCLUDED – Stiebel Eltron’s top-rated electric tankless water heaters perform with the highest standards for comfort and reliability. Our 7-Year Leakage and 3-Year Parts Warranties are included with purchase.
Bestseller No. 2
Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted
- CONVENIENT HOT WATER HEATER: 4 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 13.75 W x 13.75 H x 13.5 D Inches
- LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined material for a long service life. (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
- 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)
- 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
SaleBestseller No. 3
GIRARD 2GWHAM Tankless Water Heater
- Regulates the burner to maintain the set hot water temperature
- NOTE: Water heater door is not included and must be ordered with Girard's 2GWHAM Water Heater
- 42,000 BTUs which provides the optimum performance for an RV's plumbing
- No special LP gas lines or special plumbing required
- 12V power that operates at less than 3A; Freeze protection - designed for winter use
Bestseller No. 4
Kelaro Tankless Water Heater Flushing Kit - Just add Vinegar
- Kit requires 2-3 gallons of white vinegar*** Not included. Some tankless manufacturers recommend using vinegar or another cleanser for flushing their equipment. Can also save money if you have vinegar at home already.
- Helps maintain the performance and extend the life of your tankless hot water heater. Easy directions for DIY Homeowner use.
- Includes 1/8 HP Utility Pump, 6 Ft Color Coded Hoses, 3.5 Gallon Bucket with EZ Open Lid & Instructions for using vinegar. Peel Off Lid is super flexible and much easier to remove than traditional paint bucket lids.
- Easily connects to tankless isolation valves using supplied 6' Color Coded Hoses.
- Works with Rheem, Bosch, Noritz, Rinnai, Takagi, Navien, Stiebel, Atmor, Ecosmart, Eccotemp, Marey Power, Tempra, Trutankless and others.
SaleBestseller No. 5
Ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology,White
- The product is highly durable
- The product is easy to use
- Manufactured in China
- Copper and stainless components
- Lifetime warranty for residential use
SaleBestseller No. 6
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
- 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
- ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98
SaleBestseller No. 7
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
SaleBestseller No. 8
Hydro Master 3/4-Inch IPS Isolator Tankless Water Heater Service Valve Kit with Pressure Relief Valve, Clean Brass
- Lead Free Brass- Meets all federal & state standards for lead levels in drinking water system components
- Tankless Water Heater Service Valves 500WOG, colored valve handles for easy identification of hot and cold valves
- Include a residential pressure relief valve (150 PSI/500,000 BTU)
- Certified by CSA Group
- Easy to Install
Bestseller No. 9
Happybuy 18L Propane Water Heater 4.8GPM Tankless Propane Water Heater Fit for Home outdoor RV Use
- Propane Water Heater - Water heaters parameter：Gas type: Liquefied Propane Gas ,Water flow rate: 18 L/min,Heat load: 36 KW,Rate gas pressure: 2000 Pa,Suitable Water Pressure: 0.02-0.8MPa,water pipeline:G1/2" steel tube,Ignition mode: 2 qualified 1.5V batteries (No included batteries).
- Multi Protection - The gas hot water heater adopt heat resistant metal body,Low water pressure startup function,High efficient energy saving,Anti-freezing protection function,Over heat protection,Over water pressure protection function,Low water-pressure startup,Stable water flowing under high pressure,Automatic IC ignition system(No included batteries).
- LED Screen and Stainless Steel Body - The instant water heater use adjusting knob controller,adjust the temperature as needed,Power Off Automatically when heater opening over 20 Minutes. Over heat Protection that the water heater will be automatically turned off over 75 °C .Please Note:Depending on the temperature of the environment ,heat time may be prolonged and flow may be slightly smaller, that is normal.
- Energy-Saving and Combustion Technology - The tankless gas water heater adopt advanced energy-saving and combustion technology to decrease gas consumption and burning noise,Compact and light weight structure with 11.5% energy saving technology,Compact size and lightweight design for easily carry.
- Application Environment and Note - The portable hot water heater suit for the household,offering you a relaxing shower at home.Note:The type of water heater is only suitable for Liquefied Propane Gas. Please confirm the gas type before buying! Do not install the water heater in the bathroom!
Bestseller No. 10
Rinkmo Electric Tankless Water Heater 18KW 240V Instant Hot On Demand Residential Electric Water Heater for Bathroom Bathtub rv Whole House Shower Sink Small
- 🚿【365Days & 24H Endless Hot Water】: No need to preheat before using instant tankless water heater. As soon as you turn on the tap, the hot water ﬂows with your desired temperature. No waiting for preheat or standby energy loss, save your time and money.
- 🚿【10-fold Security Technology Systems More Safe】: This is a Safe water heater, design for whole house using especially those with babies at home. Inner water and electricity lines are designed to run separately so as to avoid rusting or mineral buildup issue that do great harm to water quality and your safe. So you can get steady stream of clean and fresh hot water for daily life.
- 🚿【Save Money Save Cost】: After using our Rinkmo high efficient water heater, you will find your water Heating Costs Reduce Up to 60%, due to our heater is 99.8% Energy Efficient, you can get hot water within 3s; Create heat without direct contact with metals,No mineral buildup so you don't need to maintenance or fix it and replace the heater coils, No expensive maintenanc cost in the future.
- 🚿【Stable Water Temp for Whole House 】: Our smart modulating technology and formula to calculate the difference between the desired temp and current temp, adjusts power input based on flow rate and temp setting in real time by our temp sensors and flow sensors. No sudden temp changes.
- 🚿【Compact Size Save Space】: Rinkmo water heater only like a small suitcase, save your space and giving more to your living area. Easy to install and operation, set temp by turning the button, press the button to switch between Fahrenheit/ Celsius.