Don't know what best instantaneous hot water heater to buy? As we have already gone through the instantaneous hot water heater research process, we understand this problem.
Our comprehensive instantaneous hot water heater list includes the best instantaneous hot water heaters available on the market today. Several hours of research and combining all of the current models lead to the top instantaneous hot water heater of 2021. Here are our rankings!
10 Best instantaneous hot water heater Editor Recommended:
Buyer's Guide of Best instantaneous hot water heater
- ➤ [UPGRADED] MUST HARDWIRED attached a fixed power cord around 28". small Tankless water heater for single sink wash use only - Save up to 60% on your water heating cost with an Thermoflow electric tankless water heater. Avoid distribution, start-up and technical systems losses as well as circulation and storage losses.
- ➤ ENDLESS INSTANT HOT WATER - No need to preheat before using. As soon as you open the tap, the water ﬂows out with your desired temperature. High efficient,saving energy.
- ➤ COMPACT DESIGN - Super compact designed, even smaller than a shoe box. Wall-mounted design for installation at the point of use, frees up floor space for more storage, easy to install into washbasin cabinet and other tight spaces!
- ➤ EXCEPTIONALITY DURABLE - Instant hot water thanks to rapid and maintenance-free bare wire heating systems. High quality alloy bare heating element has good corrode resistance and acid-resisting performance, with longer lifespan, instantaneous heating efficiency up to 99%.
- ➤ NOTES - Please verify that this model is the right size for your hot water needs and electrical requirements before purchase & installation. Dimensions: 7.4" x 5.4" x 3.4"; Weight: 3lbs; Pipes fittings: 1/2”NPT, Electrical requirements: 3.5kW at 208 volts or 4.7kW at 240 volts, Nominal pressure: 150PSI. Nominal current: 25A. Required breakers: 1x 2-POLE 25A. Required wire: 1 x 12AWG . ( Breakers and wire are NOT included )
- CONVENIENT TANKLESS HOT WATER HEATER: 12 kW output tankless electric water heater eliminates long waits for hot water at point-of-use
- EASY INSTALLATION: Easily install under any bathroom or kitchen sink and get on demand hot water at your every need. Common Applications-Commercial tentant improvements (ie: office suite with a sink or an attached bathroom), Garage apartments, In-law suites
- TEMPERATURE CONTROLED: Features thermostatic control for easy temperature output adjustments to match your preference
- IMPORTANT INFORMATION: Unit is only designed to operate on 240-Volt. Dimensions : 12.75 x 6.5 x 3 Inches
- GREAT EFFICIENCY: 98% efficient with minimal stand-by loss. Water pressure range of 10-150 PSI
- 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
- ✅3 seconds that is hot, really thermostat without waiting.Constant temperature maintains the optimal water temperature for you.
- ✅Safe and intelligent, no water flow stops heating.0.1 second automatic power-off when leakage.
- ✅It heats water as the water passes thru the unit, instant heating, so you can use the hot water as you like.
- ✅Suitable for universal water pipe: 1 / 2 inch diameter (inflow or outflow)Easy to install under the bathroom or kitchen sink for washing dishes, food, clothes, faces and other functions.
- ✅Various protections: Leakage protection, IPX4 waterproof, Dry heating protection, Water-electricity isolation, Auto power-off at inactive state, Over-temperature automatic power-off.
- 【INSTANT & SUFFICIENT HOT WATER】Applied with 5.5KW heating system, the electric water heater supplies instant, consistent and endless hot water of 116℉or higher temp shortly, no waiting for preheat nor terrible temp up & down, perfect companion for sinks. Time to get rid of those "lukewarm" toys.
- 【SMART SELF ADJUSTMENT】The hot water heater adjusts power input based on flow rate and temp setting in real time. For example, less power will be applied by the system when waterflow reduced, thus you still get ideal temperature instead of scalding hot water, which means comfortable experience. Optimal energy efficiency of 98% saves considerable electric charge.
- 【CONVENIENT USE】The tankless water heater comes with digital display & touch control panel so temp setting is easy job. Now turn on the tap and let the smart unit do the rest, you needn’t go through hard lesson about temp setting by a mixer tap without any hint. The Black model comes with Remote control, useful for installation under sink.
- 【SAFE and DURABLE】Applied with multiple protection devices, every piece goes through strict tests to ensure 100% safe. Inner water and electricity lines are designed to run separately so as to avoid leakage or harm of scale build up. Approval by ETL and qualifies for UL, you can expect outstanding performance for years to come.
- 【POINT of USE】The sleek tankless water heater is compact as an oatmeal box, making it possible to install anywhere close to outlet and avoid energy waste. It can be mounted horizontally, vertically, obliquely, ideal for kitchen, bar, school, hospital, community and hair salon. Please verify it is the right size for you: 5.5kW@240V; dimensions 11" x 7.5" x 2.35"; pipes fittings :1/2" NPT.
- 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. Thermal efficiency is 98%. Dimensions : 13.75 W x 13.75 H x 10.75 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
- CONTINUOUS FLOW – Advanced Flow Control 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 control water flow. Savings monitor even shows how much you save on energy costs
- EASY OPERATION – Electronic switch activates the hot water heater and it’s noise free while in use. Has a digital temperature display and preset temperature and memory buttons, while the interior solid copper heating system does all the power work
- TEMPRA 24 PLUS – This specific model is 24kW, 240V, requires a min recommended electric service of 150 A, and offers an output water temperature of 68° 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
- NOTE: Choose Only for 110~120V, Water flow and inlet water temperature will affect the heating performance as it's only 3.5kW. 2 years warrant for free replacement and refund, contact us for any problem before your return. TANKLESS electric water heater - 0.5GPM at temp rise 45°F for single sink washing use of small water flow use, ideal for summer or warm weather.
- HARD WIRED ENDLESS HOT WATER - No need to preheat before using. As soon as you open the tap, the water flows with your desired temperature. High efficient, Energy Saving
- COMPACT DESIGN - Super compact designed, even smaller than a shoe box. Wall-mounted design frees up floor space for more storage, easy to install into washbasin and other tight spaces!
- EXCEPTIONALITY DURABLE - Instant hot water thanks to rapid and maintenance-free bare wire heating systems. High quality alloy bare heating element has good corrode resistance and acid-resisting, with longer lifespan, instantaneous heating efficiency up to 99%.
- NOTES - Please verify that this model is the right size for your hot water needs and electrical requirements before purchase & installation. Dimensions:7.4" x 5.4" x 3.4" ; Weight: 3.0lbs; Pipes fittings :1/2" NPT, Electrical requirements: 3.5 kW, 120 volts, Nominal pressure: 150PSI. Nominal current:29A. Required breakers:1x 2-POLE 30A. Required wire: 1 x 12 AWG . ( Breakers and wire are NOT included )
- Compact and stylish with digital temperature control in increments of 1f ranging from 80f to 140f
- RTEX04 and RTEX06 only show output temperature and are non thermostatically controlled
- 【SAFE DURABLE & LONGEVITY】Made of stainless steel and never rust，Anti-leakage plug，Multiple safety protection functions protect you from the risk of scald, leakage or other injury.Premium plastic shell is corrosion resistant，This mini hot water heater is ideal for kitchen, bar, school, hospital, community and RV.
- 【SMART INVERTER FOR ENERGY SAVING】Automatic heat preservation and storage of hot water, 2.5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%，Maximum temperature167℉，The built-in smart chip heats up to the temperature you set, and automatically Insulation when heated to the specified temperature.
- 【EASY TO USE】storage tank electric water heater with easy-to-operate knob temperature adjustment design，Easy to control warmth.Vent valve, Tee pipeline， pipes and other accessories are complete for quick installation without additional expenses or preparing time of accessories.
- 【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，8-15 minutes to heat to your desired temperature).
- 【COMPACT DESIGN】Can be shelf, wall or floor mounted (Water inlet and outlet upward); Dimensions: 13.0''L x11.4''W x10.6''H; 9.5lbs; 1/2″NPT NPT. 1.5 kW, 110-220 volts. One-year warranty and 24H customer service support, feel free to contact us.
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