Best 12 Gpm Tankless Water Heater In June 2025

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Here you have our curated list of Best 12 Gpm Tankless Water Heater. Each of them comes with different price, style, and design, so you have plenty of options to choose from. Keep reading for our top products review!

To help you in your search, we have completed this list of the Best 12 Gpm Tankless Water Heater.

Top Rated Best 12 Gpm Tankless Water Heater Of 2025

Rank	Product Name	Score
1	ECOTOUCH Tankless Water Heater Electric, 1.5 GPM On Demand Hot Water Heater Buy Now	9.7 Buy Now
2	Thermoflow UT15 4-Gallons Electric Mini-Tank Water Heater Under Sink, 1.5kW at 120 Volts Buy Now	9.5 Buy Now
3	AQUAH Outdoor Liquid Propane Gas Tankless Water Heater 10 L / 2.7 GPM Buy Now	9.1 Buy Now
4	Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time Buy Now	8.8 Buy Now
5	TC-Home 12L Natural Gas Water Heater Balanced Exhaust System Tankless Hot Water Heater Buy Now	8.6 Buy Now
6	Bosch Electric Tankless Water Heater - Eliminate Time for Hot Water - Easy Buy Now	8.3 Buy Now
7	Bosch Electric Tankless Water Heater - Eliminate Time for Hot Water - Easy Buy Now	8.1 Buy Now
8	Camplux Propane Tankless Water Heater,3.18 GPM High Efficiency Instant Hot Water Heater Buy Now	7.8 Buy Now
9	EcoSmart 8 KW Electric Tankless Water Heater, 8 KW at 240 Volts Buy Now	7.5 Buy Now
10	V65IP 6.6 GPM Indoor Low NOx Tankless Propane Water Heater Buy Now	7.2 Buy Now

1. ECOTOUCH Tankless Water Heater Electric, 1.5 GPM On Demand Hot Water Heater

• Instant & sufficient hot waterapplied with 5.5kw heating system, the electric water heater supplies instant, consistent and endless hot water of 116or higher temp shortly, no waiting for preheat nor terrible temp up & down, perfect companion for sinks. time to get rid of those "lukewarm" toys.
• Safe and durableapplied 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.
• Smart self adjustmentthe 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 usethe 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 neednt 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.
• Point of usethe 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: email ,protected , dimensions 11" x 7.5" x 2.35", pipes f...

2. Thermoflow UT15 4-Gallons Electric Mini-Tank Water Heater Under Sink, 1.5kW at 120 Volts

• 4.0 gallon capacity - 4.0 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it.stainless steel tank and heating element designed for efficiency, durability and easy replacement
• Notes - please verify that this model is the right size for your hot water needs and electrical requirements before purchase & installation. dimensions: 18h x 12.2w x 11d inches ,weight: 14 lbs,water connections :1/2 inch npt, electrical requirements: 1.5 kw, 120 volts. operating pressure : 150psi.nominal current: 13a .
• Thermostop function - low stand-by loss power consumption. the thermoflow ut15 with advanced thermostop technology of germany, when the water heater reaches a high or low set temperature,itll stop heating or reheating automatically.
• Safety - active protection circuit for safe installation. if the water heater does not come out with hot water when its already connect to the electric supply, then the water heater will cut off the electric supply automatically to prevent the water heater from overheat.
• Eps foaming technology - heating water quickly,fast recovery rate eliminates long waits for hot water at your sink.

3. AQUAH Outdoor Liquid Propane Gas Tankless Water Heater 10 L / 2.7 GPM

• 45 dgrees temperature rise at the flow rate of 2.7 gllons per minute (gpm)
• Aquah liquide propane gas tankless water heater, 2.7 gal (10 l)/min or 159 gal/hr,
• 85% thermal efficiency, 20,000 watt / 68,242 btu/h thermal input
• Automatic electrical pulse ignition with no standing pilot, operated by 2 d batteries or 120v ac
• Free 1/2" bsp (metric) to 1/2" npt adapters for gas/water fittings ($45 value).

4. Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate 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
• 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
• Independent installation: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source
• 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)
• 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)

5. TC-Home 12L Natural Gas Water Heater Balanced Exhaust System Tankless Hot Water Heater

• 5. over water pressure protection function : to automatically decrease pressure under excessive high water pressure.
• 1. high efficient energy saving : the heater exchanger and main burner adopt mostly advanced energy-saving and combustion technology to decrease gas consumption and burning noise.
• 6. controller design : both cold water and warm water can be properly controlled 7. magnificent thin-shaped appearance : it is designed by modern fashionable line shape.
• 2. low water-pressured startup : the water control linkage valve makes the heater start up under low water pressure and shortage areas and those living in high stairs. 3. manifold auto protection : for the sake of your safety
• 4. ion flame inspection : to automatically shut down gas power under unexpected flameout.

6. Bosch Electric Tankless Water Heater - Eliminate Time for Hot Water - Easy

• Easy installation: easily install under any bathroom or kitchen sink and get on demand hot water at your every need
• Convenient tankless hot water heater: 3. 4 kw output tankless electric water heater eliminates long waits for hot water at point-of-use
• 30 a
• Space saving: mounts on wall vertically or horizontally and is space saving, ultra-compact, and lightweight
• Great efficiency: 98% efficient with minimal stand-by loss. water pressure range of 10-150 psi

7. Bosch Electric Tankless Water Heater - Eliminate Time for Hot Water - Easy

• Easy installation: easily install under any bathroom or kitchen sink and get on demand hot water at your every need
• Temperature controled: features thermostatic control for easy temperature output adjustments to match your preference
• Great efficiency: 98% efficient with minimal stand-by loss. water pressure range of 10-150 psi
• Convenient tankless hot water heater: 12 kw output tankless electric water heater eliminates long waits for hot water at point-of-use
• Important information: unit is only designed to operate on 240-volt. dimensions : 12.75 x 6.5 x 3 inches

8. Camplux Propane Tankless Water Heater,3.18 GPM High Efficiency Instant Hot Water Heater

• Considerate customer service- here at camplux, customer service is everything! we offer 24 shift hours customer service make the customer experience easy and fast through our live chat, phone support & our online helpdesk.
• Convenient, easy installation -uses standard 1/2" npt water fittings and comes with 2.3 inch horizontal venting pipe allowing for convenient and quick installation,great for whole home,small cabins and remote apartments use. you can take camplux customized wall thimble-wt236 for perfect indoor use.
• Sleek,modern,compact design -trendy and modern design with unique black glassy front panel featuring an easy to use led touchscreen controls with fahrenheit digital & display. (fahrenheit and celsius switch optional) .the compact size - (l)14.4 x (w)4.7 x (h)25.4 inch tankless water heater saves more space than traditional tanks.
• Instant tankless water heater -high water capacity range 0.8 - 4.8 gpm, camplux high efficiency 3.18 gpm propane tankless water heater delivers 3.18 gallons per minute of on-demand endless hot water ensures instant hot water for 2-3 persons home comfortable shower.
• Multiple protection ensure your safety- dry combustion,flame failure device, anti-freezing protection, over heating protection to ensure your safety. fully automatic temperature controls with an energy saving mode and child lock technology.

9. EcoSmart 8 KW Electric Tankless Water Heater, 8 KW at 240 Volts

• The product is highly durable
• The product is easy to use
• Manufactured in china
• Activation flow - 0.3 gpm
• Heating elements are durable and are threaded for easy replacement

10. V65IP 6.6 GPM Indoor Low NOx Tankless Propane Water Heater

• V65ip he high efficiency tankless hot water heater - propane: indoor installation only
• Control-r 2.0 mobile app features timers and schedules throughout the day and allows you to remotely put the system into vacation mode.
• Residential factory warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)
• Up to 6.5 gpm hot water flow rate (varies by groundwater temp)
• Endless hot water for your entire home.10,300 btu (minimum) / 150,000 btu (maximum)