Instant water heaters in comparison
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Last updated on 19.09.2026
1
Rheem RTEX-06T, 6.5kw Professional Classic 240V Point of Use Thermostatic Tankless Electric Water Heater
Rheem
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9,9
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2
Waterdrop KJ600 Instant Hot Reverse Osmosis System, 600 GPD, Tankless RO
Waterdrop
33% off
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9,8
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3
InSinkErator H-HOT150SN-SS Instant Hot Water Dispenser System with Stainless Steel Tank, Satin Nickel
InSinkErator
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9,6
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4
Ranein Propane Gas Tankless Water Heater, 3.6 GPM, 80,000 BTU, Indoor
Ranein
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9,5
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5
KENUOS 4 Gallon Water Heater Under Sink Instant Hot Water Heaters 1500W 110V 120V Mini Tank Water Heater with T&P Vavle 1/2" NPT for Kitchen,Bathroom,Camper,RV,Grey
KENUOS
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9,5
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6
Portable Water Heater Propane Tankless - 6L 1.58GPM RV on demand Hot Gas Outdoor Digital Display Water Heater for Camping,Boat,Cabins
RUINOPAR
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9,5
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7
Chromex Tankless Water Heater Flush Kit with NSF Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump
Chromex
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9,4
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8
ThermoMate Electric Tank Water Heater, 8.0 Gallon Point of Use Instant Small Hot Water Heater 120V 1440W, Wall or Floor Mounted, Plug-in to Use, UL Listed ES800
thermomate
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9,4
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9
12KW Electric Tankless Water Heater 240V, Self Modulating White Unit
GREATBEAR
free shipping
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9,3
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10
Chronomite SR-20L/208 HTR 208-Volt 20-Amp SR Series Instant-Flow Low Flow Tankless Water Heater by Chronomite
Chronomite
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9,2
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You might also be interested in these instant water heaters.
9% off
18kW Tankless Water Heater Electric, NOVIEEX 240V 3s Instant Hot Water Heater, Flow Rate Max 4.9 GPM, Supply for 2-3 Points, Indoor Installation, Ideal for Apartment, Garage, Salon, Bathroom, Kitchen
【HIGH-POWER 18kW PERFORMANCE】 Built for demanding hot water needs, this 18kW tankless water heater delivers high-power heating performance at 240V, with a maximum current of 75A. It requires 2 × 40A double-pole circuit breakers and 2 sets of 8 AWG wires with a ground wire. The unit measures 11.14" (W) × 15.86" (H) × 3.18" (D) and features 3/4" NPT water connections. Please consult a qualified electrician and verify that your electrical system meets the requirements before purchasing.
$ 254.97
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To the product (1 offer)
CAMPLUX 5L Portable Tankless Water Heater, 1.32 GPM Outdoor Propane Shower for Camping, RV, Off-Grid, Instant Hot Water with Folding Handle, Overheat Protection, Low Pressure Startup, AY132, White
Lightweight & Portable for Camping: Make your outdoor trips easier with this compact portable water heater. Weighing only 10 lbs with a folding handle, it fits perfectly in your car or RV. Whether you are camping, fishing, or on a family road trip, you can carry it anywhere to enjoy a warm, clean shower after a long day of fun
$ 151.99
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GE Appliances 18 Gallon Versatile Plug and Play Electric Water Heater with Adjustable Thermostat, Easily Installs Where You Want It, 120 Volt
WHOLE HOME FLEXIBILITY - Can provide hot water to a single hookup, or to a small house, condo, or apartment
$ 315.00
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APUS Propane Tankless Water Heater, 95,000 BTU, 4.42 GPM, Indoor
Powerful & High-Capacity: This high-performance propane tankless water heater delivers 95,000 BTU heating capacity with 4.42GPM high flow rate, featuring innovative 0.66GPM low-flow start technology. As a versatile propane tankless water heater, it meets simultaneous hot water demands for 2 showers plus 1 sink while maintaining stable temperatures even during peak usage
$ 359.99
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13% off
14kW Tankless Water Heater Electric ORBEK On Demand Heater 240V 3.38GPM
Note: Please ensure the household circuit breaker panel has a total current capacity of at least 150 amps. Our Orbek tankless water heater electric 14kw requires a 240V/60AMP two-pole breaker, 1 set of 6 AWG wires and 1/2" NPT water connections.
$ 199.99
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Mini Tankless Under Sink Instant Water Heater 120V 3kW Plug In, LED Digital Display with Control Knob, IPX4, Multiple Safety Features, 30-55℃ Thermostatic On Demand Electric Water Heater, Modern Gray
Note: This 3kW 120V mini water heater is designed for low-flow use only, not suitable for showers or multiple taps at once. The output water temperature is affected by many factors, including the water heater wattage (heating capacity), inlet water temperature and water flow. For a better warm water use experience, we recommend that you consider our higher wattage model 6kW 240V first, which is hard-wired
$ 179.99
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7% off
VEVOR RV Tankless Water Heater, 42000BTU, Instant Shower with 15 x 15 inches White Door and Remote Controller, Ideal for RVers' Family Everyday Use (Propane)
Rapid Instant Heating: The RV water heater offers 42,000 BTU of high power, delivering hot water quickly to meet your needs for showering, dishwashing, and more.
$ 193.76
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22% off
Hillhub Portable Propane Water Heater for Camping Instant Hot & Shower Pump
【3s Instant Heating】 Boasting 20,500 BTU ultra-heating efficiency, camping water heater delivers lightning-fast heating in just 3 seconds, raising hot water temperature to 77°F (25°C) instantly—ideal for portable shower for camping or camping water heater. With hot water flow rate of 2.2-3L/min and gas consumption of 20MJ/h, perfect for outdoor use where reliable portable water heater is essential, no more waiting for hot water.
$ 280.44
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5% off
14kW Tankless Water Heater Electric 240V, Sink & Shower,Gray
【PLEASE NOTE BEFORE PURCHASE】Ensure this 14kW 240V tankless electric water heater meets your hot water demand. Requires 1 x 60-amp circuit breaker. Unit dimensions: 15.87"x11.14"x2.87"; standard 1/2" NPT water connection. No need to disassemble the housing for wiring, making installation faster and more convenient.
$ 208.99
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18% off
Stiebel Eltron Tempra 24 Trend Electric Tankless Water Heater, 24kW, 240V
CONTINOUS FLOW – Hot showers will never be interrupted again. Enjoy continuous, on-demand hot water with an unlimited supply, when you want it without wasting any energy when not needed
$ 533.22
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21% off
EcoSmart POU 4T 3.5kW 120v Thermostatic Point of Use Tankless Electric Water Heater
Perfect fit to provide hot water for point-of-use or low-flow applications.
$ 140.97
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23% off
Westinghouse Tankless Water Heater Gas Indoor, 7.9 GPM, 180,000 BTU
【On-Demand Efficiency】 Westinghouse tankless water heater works only needed, saving energy and costs. Compact yet powerful for whole-home or commercial use. LED display shows temperature, working state and error codes
$ 849.99
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