Top 28 12 GPM Tankless Water Heaters on Amazon (Verified You can Buy)
Top 1
New Upgrade 12kW Tankless Water Heater Electric, 240 Volt On Demand Instant Hot Water Heater, Up to 2.83 GPM for 2-3 Point of Use, with LED Digital Display, Real-Time Usage Monitoring (White 240V)
PeiXWming
MRTDF00F
11.22 x 11.22 x 19.09 inches
Highly Efficient
Ratings for PeiXWming (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Peiming | - | ❌ | ❌ | ❌ |
Features
【Instant Hot Water Supply】PeiXWming 240V electric tankless hot water heater can provide up to 2.83 GPM of unlimited hot water as needed, and can provide hot water for 2-3 usage points simultaneously. It can provide continuous hot water supply in just 3 seconds, eliminating long waiting times and the anxiety of running out of hot water in the tank.
【Intelligent Frequency Conversion】The intelligent system of this electric tankless water heater 240v can automatically adjusts energy consumption based on the inlet water temperature and flow rate to ensure maximum efficiency, continuous stable temperature, and optimal power usage. Thanks to a built-in chip that can be adjusted more than 20,000 times per second, this tankless electric water heater can keep the water temperature within ± 1 ° F of your selected temperature, ensuring a consistently comfortable shower experience for you.
Wintemp Tankless Water Heater Electric 12kW, 240 Volt On Demand Instant Hot Water Heater, Within 1℉ Stable Temp, Up to 2.8 GPM, WiFi Control, ETL Certified, Eco, WM12
WINTEMP
WM12
8.1 x 8.1 x 12.2 inches
10.1 pounds
Ratings for WINTEMP (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| WINTEMP | - | ❌ | ❌ | ❌ |
Features
Important Note: Before purchasing, please ensure this unit meets your installation requirements. The WM12 model is rated at 12kW (240V) with a maximum current of 50A. It requires 1 × 50 Amp double-pole breaker and 1 set of 8 AWG wiring for installation, with 1/2" NPT water connections(Hardwired installation is required)
Stable Water Temperature: The built-in adaptive chip automatically adjusts heating power based on incoming water temperature and flow rate, ensuring maximum efficiency and delivering consistently comfortable hot water. Provides up to 2.8 GPM of steady hot water with temperature control maintained within ±1°F. No more running out of hot water, and no more sudden temperature swings during your shower. In warmer southern regions, it can support shower use, while in colder areas, it is better suited for sinks, office breakrooms, point-of-use, and low-flow applications, and can also be used as a booster heater. Ideal for 1–2 points of use in the home
Top 3
Andeman RV Tankless Water Heater 55,000 BTU 2.9GPM Instant Hot Water System with Remote & 15x15inch Door - 12V DC Power, CSA Certified, Easy Installation for Motorhomes/Campers/Trailers (Black)
Andeman
55,000 BTU
14.96 x 14.96 x 14.96 Inches
24.87 pounds
Ratings for Andeman (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Hongnacom | - | ❌ | ❌ | ❌ |
Features
【55,000 BTU Instant Hot Water On Demand】Get 2.9 gallons per minute of continuous, on-demand hot water in seconds with a robust 55,000 BTU output—no preheating needed. Perfect for running showers, sinks, and multiple RV appliances simultaneously.
【Comprehensive 9-Layer Safety Shield】Operate with confidence thanks to a full suite of CSA-certified protections, including flame-out, freeze, dry-fire, voltage, and pressure safeguards. This system automatically shuts down the unit to ensure reliable performance in extreme conditions.
Top 4
Best for CAMPLUX
Best for Gas Powered
Best for Outdoor
Best for Propane
Best for Eccotemp
Best for CAMPLUX
Best for 2 GPM
Best for 3 GPM
Best for 6 GPM
Best for 8 GPM
Best for 9 GPM
Best for 10 GPM
Camplux 2.64 GPM Propane Portable Gas Water Heater, Outdoor Tankless Camping Water Heater with Digital Display, White
CAMPLUX ENJOY OUTDOOR LIFE
BW264S
12.8 x 6.1 x 21.7 inches
18.0 Pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Camplux | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
CSA Safety Standard -CSA safety standard approved tankless propane water heater,flame failure device, anti-freezing protection, over heating protection to ensure the family safety. Automatically decrease water pressure between 3.6-110 PSI. The anti-freezing drain plug can discharge the residual water to avoid freezing in cold areas or in case of long time no use. The propane hot water heater will shut off automatically when high water temperature protection over 176 °F.
Lightweight Portable Design-Compact size and weights 23 lbs for easily carry. Hang it using the mounting bracket on the top/back of the gas water heater. It only takes you a 15 minutes to install the propane water heater.
Top 5
Best for Inline
Best for Tanked
Best for Electric
Best for Boiler
Best for 40 Gallon
Best for 80 Gallon
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for Rinnai
Best for EcoSmart
Best for FOGATTI
Best for GASLAND
Best for AO Smith
Best for 2 GPM
Best for 3 GPM
Best for 6 GPM
Best for 7 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 14 GPM
Best for 15 GPM
14kW Tankless Water Heater Electric, ORBEK On Demand Instant Hot Water Heater 240V, Max 3.38 GPM, Supply for 1-2 Fixtures, ETL Certified, Indoor Installation, New Upgraded 2.0
Orbek
14kW 2.0 Model
9.5 x 9.5 x 14.2 Inches
Ratings for Orbek (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Westinghouse Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
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.
Instant Hot Water Supply: Orbek electric tankless water heater 240v can provides max 3.38 GPM of on demand endless hot water and ensure comfortable hot water for 2-3 points of use
Ranein 12L Portable Propane Water Heater, Outdoor Up to 3.18 GPM, 68,000 BTU On Demand Instant Hot Tankless Water Heater
Ranein
TMYD-01020120
13.0 x 13.0 x 21.7 Inches
18.0 pounds
Ratings for Ranein (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ranein Store | - | ❌ | ❌ | ❌ |
Features
Compact Space-Saver: Measuring 21.7" x 7.1" x 13" at 18 lbs, this portable unit installs effortlessly. Operates at 3.6 PSI – solves low-pressure challenges in rural camping areas!
68,000 BTU 12L Tankless Water Heater: Outdoor water heater delivers 3.18 GPM hot water heated to 55°F–109°F (13°C–43°C). Ideal for large-volume needs: yard cleaning, cabin supply & busy campsites.
Top 7
Best for Rheem
Best for Rinnai
Best for 2 GPM
Best for 3 GPM
Best for 6 GPM
Best for 7 GPM
Best for 9 GPM
Best for 14 GPM
Westinghouse 14kW Tankless Water Heater Electric 240V, Wifi, ETL, Gray
Westinghouse
9.56 x 9.56 x 12.59 Inches
Ratings for Westinghouse (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Westinghouse Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
【Dedicated Circuit Requirements & Installation】This Westinghouse tankless water heater electric requires a dedicated 60A double-pole breaker and 6 AWG wire at 240V for stable, safe operation. With 1/2" NPT connections and a compact wall-mountable design at just 12.59"H x 9.56"W x 3.28"D that takes zero floor space, this Westinghouse electric tankless water heater offers quick, hassle-free installation—whether new build or replacement, just as you'd expect from a genuine Westinghouse tankless water heater.
【3s Instant Heating& Strong GPM Output】This Westinghouse electric tankless water heater 240v delivers hot water in just 3 seconds with 98% thermal efficiency. The minimum start-up flow rate is 0.53 GPM.When inlet temperature is 62°F and outlet is set to 105°F, flow reaches 3.4 GPM—supporting 2 water points simultaneously. This on demand water heater brings endless instant hot water to your daily routine. That's the reliable performance you expect from a 14kW Westinghouse tankless water heater electric.
Top 8
Best for Battery
CAMPLUX Portable Tankless Water Heater 55,000 BTU, 2.11 GPM Propane Water Heater for Camping, RV, Outdoor, Battery Operated with Handle, Gray, BW211G
CAMPLUX ENJOY OUTDOOR LIFE
BW211GN3
20.5 x 20.5 x 12.6 inches
14.0 Pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Camplux | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
INSTANT HOT SHOWER: Delivers 2.11 GPM continuous hot water with 55,000 BTU output. Heats up in seconds. Enjoy a comfortable bath anywhere without waiting.
BATTERY POWERED IGNITION: Runs on 2 "D" cell batteries. No electrical hookup required. Ideal for off-grid living, hunting cabins, and emergency backups.
MIZUDO Tankless Water Heater Propane, 199,000 BTU, Indoor Installation, Max 10.3 GPM, WiFi&APP Control, CSA Certified Non Condensing, High Efficiency for Large Families Residential Whole House
MIZUDO
WCIU-HW199A1G-LP-M1n
15.9 x 15.9 x 24.8 inches
55.5 Pounds
Ratings for MIZUDO (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Mizudo Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
[Professional 199k BTU Tankless Water Heater]: Experience uninterrupted hot water delivery with 10.3 GPM flow capacity, designed to support large households with 5-7 fixtures simultaneously, providing hot water only when needed, making it an economically smart choice
[Smart WiFi Connectivity for Remote Management]: Control and monitor your propane tankless hot water heater from anywhere using the dedicated mobile application. Adjust temperature settings, create custom schedules, receive maintenance alerts, and track energy usage through your smartphone
Portable Tankless Water Heater, Camplux 1.58 GPM Outdoor Propane Hot Water Heater with S/S Rain Cap
CAMPLUX ENJOY OUTDOOR LIFE
BD158NC
11.8 x 11.8 x 21.9 inches
13.7 Pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Camplux | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
𝟏.𝟓𝟖 𝐆𝐏𝐌 𝐎𝐧-𝐃𝐞𝐦𝐚𝐧𝐝 𝐈𝐧𝐬𝐭𝐚𝐧𝐭 𝐖𝐚𝐭𝐞𝐫 - Camplux propane water heater is rated at 1.58 GPM and has a maximum power output of 41,000 BTU/hour with 11.5% energy-saving technology, saving up to 50% on water heating costs
𝐋𝐢𝐠𝐡𝐭𝐰𝐞𝐢𝐠𝐡𝐭, 𝐞𝐚𝐬𝐲 𝐭𝐨 𝐜𝐚𝐫𝐫𝐲 - This portable hot water heater weights 14 lbs, makes using it for camping, Tiny Home, RV, Poolside, Washing Pets, Equestrian, Cleaning Vehicles, Greenhouses or anywhere else that you need instant reliable endless hot water for shower
Top 11
eyoo 12L Portable Propane Water Heater Up to 3.18 GPM, 68,000 BTU
Eyoo
TMYD-01030120
12.99 x 12.99 x 7.09 Inches
18.0 Pounds
Ratings for Eyoo (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eyoo Home | - | ❌ | ❌ | ❌ |
Features
Compact Space-Saver: Measuring 21.7" x 7.1" x 13" at 18 lbs, this portable unit installs effortlessly. Operates at 3.6 PSI – solves low-pressure challenges in rural camping areas!
68,000 BTU 12L Tankless Water Heater: Outdoor water heater delivers 3.18 GPM hot water heated to 55°F–109°F (13°C–43°C). Ideal for large-volume needs: yard cleaning, cabin supply & busy campsites.
Top 12
Best for Inline
Best for Gas Powered
Best for LP
Best for Digital
Best for Outdoor
Best for Indoor
Best for Propane
Best for AO Smith
Best for 14 GPM
Best for 15 GPM
18L Tankless Water Heater Propane with Digital Display 4.76 GPM 115425 BTU
Baococo
YYJ24046-18
12.6 x 12.6 x 23.23 inches
Ratings for Baococo (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Efficient & Energy-Saving: Built with cutting-edge, precision-engineered combustion technology, this propane tankless water heater delivers consistent, powerful performance while slashing fuel consumption and lowering operational burning noise for a quieter user experience. It generates a robust 115,425 BTU/hour of heating power, enough to meet steady hot water demands for camping, RV travel, outdoor bathing, and pet washing.
Reliable Technical Specifications: This portable propane water heater boasts a maximum heating output of 115,425 BTU/hour, with an adjustable temperature range from a minimum 17°F up to a maximum 113°F to match different usage needs. The system delivers a steady 4.76 gallons per minute of continuous hot water flow, perfect for quick showers, dishwashing, or pet cleaning.
Top 13
Best for Rheem
Best for Inline
Best for Tanked
Best for Electric
Best for NG
Best for Thermostat
Best for Whole House
Best for Rheem
Best for 10 Gallon
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for Rheem
Best for EcoSmart
Best for FOGATTI
Best for Eccotemp
Best for AO Smith
Best for 2 GPM
Best for 4 GPM
Best for 5 GPM
Best for 7 GPM
Best for 8 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 14 GPM
Best for 15 GPM
Rheem 11kW 240V Tankless Electric Water Heater
Rheem
RTEX-11
12.63 x 8.25 x 3.63 Inches
7.0548 pounds
99,8%
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| Plumber's Paradise | - | ✅ | ✅ | ✅ |
| CASA CAYOS | - | ✅ | ✅ | ✅ |
| AXY Co | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Trena's Liquidation LLC | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
| Vertex Harbor | - | ❌ | ❌ | ❌ |
Features
ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
Top 14
Best for Rheem
Best for Inline
Best for Tanked
Best for Electric
Best for Whole House
Best for Rheem
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for Rheem
Best for Rinnai
Best for EcoSmart
Best for FOGATTI
Best for Eccotemp
Best for AO Smith
Best for 2 GPM
Best for 3 GPM
Best for 4 GPM
Best for 5 GPM
Best for 6 GPM
Best for 7 GPM
Best for 8 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 14 GPM
Best for 15 GPM
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
Rheem
RTEX-24
18.25 x 14.5 x 3.5 Inches
17.8 Pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| GM Not Mo | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Sunny ING | - | ❌ | ❌ | ❌ |
| Nantek | - | ❌ | ❌ | ❌ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| Trena's Liquidation LLC | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
Top 15
Best for 30 Gallon
Wintemp 12kW Tankless Water Heater Electric 240V WiFi, ETL Certified
WINTEMP
WM12V
9.3 x 9.3 x 15.0 inches
12.75 pounds
Ratings for WINTEMP (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| WINTEMP | - | ❌ | ❌ | ❌ |
Features
Important Note: Before purchasing, please ensure this unit meets your installation requirements. The WM12V model is rated at 12kW (240V) with a maximum current of 50A. It requires 1 × 50 Amp double-pole breakers and 1 sets of 8 AWG wiring for installation, with 1/2" NPT water connections(Hardwired installation is required)
Endless Hot Water: Advanced flow control technology automatically maintains water temperature, ensuring maximum efficiency and consistently comfortable hot water. It delivers up to 2.8 GPM of stable hot water output, and if the hot water demand exceeds capacity, the system will slightly reduce the flow to keep the temperature steady-so your hot shower is never interrupted. In warmer southern regions, it can be used for showers, while in colder areas, it is better suited for sinks, office breakrooms, point-of-use, and low-flow applications, and can also serve as a booster heater. Ideal for 1–2 points of use in the home
Ranein 13kW Tankless Electric Water Heater, 240V on Demand Instant Endless Water Heater with LED Temperature Display, Up to 3.1 GPM for 1-2 Point of Use
Ranein
RE13K (13kW)
11.22 x 11.22 x 12.87 inches
8.3798 Pounds
Ratings for Ranein (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ranein Store | - | ❌ | ❌ | ❌ |
Features
𝐈𝐦𝐩𝐨𝐫𝐭𝐚𝐧𝐭 – 𝐂𝐡𝐞𝐜𝐤 𝐄𝐥𝐞𝐜𝐭𝐫𝐢𝐜𝐚𝐥 𝐑𝐞𝐪𝐮𝐢𝐫𝐞𝐦𝐞𝐧𝐭𝐬: This 13 kW tankless electric water heater operates on 240V and requires 1 × 60A circuit breaker for proper installation. Unit dimensions: 10.7" × 7.9" × 2.8". Water connection: 1/2" NPT. The wiring design allows installation without removing the housing, making setup faster and more convenient.
𝐒𝐚𝐯𝐞 𝐄𝐧𝐞𝐫𝐠𝐲 & 𝐒𝐩𝐚𝐜𝐞: Unlike traditional tank heaters, this on-demand electric water heater heats water only when needed—no standby energy loss, helping reduce heating costs by up to 60%. Its compact, space-saving design fits easily in tight areas such as under sinks, in small apartments, or utility spaces.
Ranein 8kW Tankless Electric Water Heater, 240V on Demand Instant Endless Thermostatic Water Heater with LED Temperature Display for Bathroom and Kitchen sink
Ranein
RE8K-U (8kW)
9.06 x 9.06 x 6.7 inches
Ratings for Ranein (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ranein Store | - | ❌ | ❌ | ❌ |
Features
Note: Make sure this on-demand electric water heater is sized for your hot water needs: 8 kW; 240 volts, circuit breaker required: 1 × 40 amps; unit dimensions: 9.06" × 6.7" × 2.34"; water connection: 1/2" NPT.Note: No need to disassemble the housing for wiring.
Save: Compared to tank-type water heaters, tankless water heaters don’t require preheating. There’s no energy consumption when not in use. It saves 60% of heating costs. Additionally, it’s more compact and can be installed anywhere.
Tankless Water Heater, Gasland Outdoors Propane Water Heater 12L BS318 3.18GPM, Portable Hot Water Heater for Cabin & Barn, Camp Water Heater for RV, Overheating Protection, Easy to Install, White
GASLAND
BS318
24.0 x 13.8 x 7.1 Inches
Ratings for GASLAND (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Gasland | - | ✅ | ✅ | ✅ |
Features
𝟯.𝟭𝟴𝗚𝗣𝗠/𝟭𝟮𝗟 𝗣𝗿𝗼𝗽𝗮𝗻𝗲 𝗪𝗮𝘁𝗲𝗿 𝗛𝗲𝗮𝘁𝗲𝗿 - Maximum power output 82,000BTU/Hr.The temperature raise is 109.4℉ (43℃) at its highest point and 55.4℉ (13℃) is at its lowest point of 3.18 GPM. Also, 3.18 gallons of hot water can be produced per minute at the flow rate of 3.18 GPM. Low water pressure start up, just need 3.6 PSI of water pressure to start.
𝗚𝗼𝗼𝗱 𝗳𝗼𝗿 𝗢𝗳𝗳-𝘁𝗵𝗲-𝗚𝗿𝗶𝗱 - Runs on a standard 20 lb. liquid propane tank and is equipped with an electronic ignition powered by two D-cell batteries. Can be used in a variety of scenarios: while you're camping, RVing, hunting, hanging poolside, washing your pets or horses, cleaning your vehicle, or even in your tiny home, greenhouse, or cabin house.
Top 19
Best for Whole House
Best for 80 Gallon
Best for Stiebel Eltron
Best for EcoSmart
Best for 4 GPM
Best for 14 GPM
18kW Tankless Water Heater Electric 240V WINTEMP, On Demand Instant Hot Water Heater, Up to 4.3 GPM, with LED Temperature Display, Whole House Hot Water Supply, WiFi Control, ETL Certified
WINTEMP
WN18
19.1 x 11.1 x 4.0 inches
12.0 Pounds
Ratings for WINTEMP (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| WINTEMP | - | ❌ | ❌ | ❌ |
Features
Important Note: Ensure this tankless water heater meets your installation requirements, 150 Amp Household Service Recommended. The WN18 model is rated at 18KW (240V) with a maximum amperage of 75A. It requires 2 x 40 Amp DP breakers and 2 x 8/2 AWG wiring with ground. The unit dimensions are 11.1” (W) x 19.1 ” (H) x 4” (D), the water connection is 3/4" NPT, Please consult a qualified electrician before purchasing
Stable Water Temperature: Automatically adjusts energy consumption based on incoming water temperature and flow rate to ensure maximum efficiency, continuous stable temperature, and optimal power usage. Its maximum hot water output is 4.3 gallons per minute. It is perfect for residential shower use, eliminating the need to wait for preheating. There’s no longer any concern about running out of hot water in the tank, and you won’t experience temperature fluctuations during your shower. Provides continuous hot water for showers and everyday household use
Top 20
Best for Rheem
Best for Inline
Best for Tanked
Best for Whole House
Best for Rheem
Best for 20 Gallon
Best for 50 Gallon
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for Rheem
Best for Rinnai
Best for EcoSmart
Best for FOGATTI
Best for Eccotemp
Best for AO Smith
Best for 2 GPM
Best for 5 GPM
Best for 7 GPM
Best for 9 GPM
Best for 11 GPM
Best for 14 GPM
Best for 15 GPM
Rheem 18kW 240V Tankless Electric Water Heater
Rheem
RTEX-18
18.5 x 14.5 x 3.5 inches
14.78 Pounds
99.8%
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Miami Water Heater | - | ✅ | ✅ | ✅ |
| CARESAN | - | ✅ | ✅ | ✅ |
| CASA CAYOS | - | ✅ | ✅ | ✅ |
| Amazon.com | - | ✅ | ✅ | ✅ |
| Trena's Liquidation LLC | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Mega Mart Warehouse | - | ❌ | ❌ | ❌ |
| PEACHSTATESTEALSANDDEALS | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
External digital thermostatic control with LED display (+/1 degree accuracy)
Most advanced self-modulation, adjust power to meet hot water demand
CAMPLUX Tankless Water Heater Propane, 2.64GPM Portable Water Heater for Off Grid, Camping,BW264, White
CAMPLUX ENJOY OUTDOOR LIFE
BW264-CA
7.0866 x 12.9921 x 21.6535 Inches
20.9439 Pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Camplux | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
This refurbished product is tested and certified to work properly. The product will have minor blemishes and/or light scratches. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, and may arrive in a generic box.
Top 22
3.18 GPM 12L Tankless Propane Water Heater with Overheating Protection
SANAUGAS
SND12-318
11.0 x 11.0 x 16.0 inches
6.6 pounds
Ratings for SANAUGAS (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| SANAUGAS | - | ❌ | ❌ | ❌ |
Features
【Instant Hot Water】 Instant water heaters provide hot water on demand, which is the ideal choice for your hot water needs. LED display is available to show power status. 6-in-1 protection ensures you a safe and comfortable bathing experience, including flame failure protection, dry combustion protection, overheat protection, high Water pressure protection, anti-freezing protection and low water flow protection
【Comfortable Bathing Experience】3.18 gallons of hot water can be produced per minute at the flow rate of 3.18 GPM. Maximum Power Output: 82,000 BTU/Hour. With 3.6 PSI minimum water pressure, our camping hot water heater is suitable for any low-water-pressure area, like campsites, mountains and farm
14kW Tankless Water Heater Electric, SIVUATEK 240V Instant On-Demand Hot Water Heater, 2 Point of Use, Self-Modulating, ETL Certified, Endless Water Supply for Home
SIVUATEK
TSB-140
12.2 x 12.2 x 17.25 inches
15.0995 Pounds
Ratings for SIVUATEK (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| SIVUATEK-US | - | ❌ | ❌ | ❌ |
Features
【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.
【ENERGY-SAVING & EFFICIENT】Eliminate standby energy loss with our electric tankless water heater —no preheating, zero idle power use. Reduce your water heating costs by up to 60% compared to traditional models. Compact and space-saving, it installs flexibly under-sink or on-wall.
Top 24
Best for Inline
Best for Electric
Best for NG
Best for Compact
Best for Digital
Best for Mini
Best for Outdoor
Best for Thermostat
Best for Whole House
Best for Under Sink
Best for Wall
Best for Residential
Best for High Efficiency
Best for 120 Volt
Best for 10 Gallon
Best for 60 Gallon
Best for 80 Gallon
Best for 100 Gallon
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for Stiebel Eltron
Best for EcoSmart
Best for FOGATTI
Best for GASLAND
Best for Eccotemp
Best for AO Smith
Best for 2 GPM
Best for 7 GPM
Best for 9 GPM
Best for 11 GPM
Best for 14 GPM
Best for 15 GPM
110V Tankless Water Heater Electric, 3000W Tankless Electric Water Heater Instant, Under Sink Water Heater with Digital Display, On Demand Hot Water Heaters Electric for Kitchen Washin Bathroom.
xwdzswgs
Tankless Water Heater
4.32 x 4.32 x 7.86 Inches
Ratings for xwdzswgs (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| liuyiliang7788 | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Tankless Electric Water Heater - This electric tankless water heater uses stainless steel and ABS materials, LED display. With 3000W power, the electric water heater tankless can raise the water by 82° F(0.3GPM) -131° F(0.5GPM) in seconds. The instant water heater can set Fahrenheit or Celsius degrees by holding the power button for 6 seconds. This 110 volt electric tankless hot water heater uses advanced technology, no need to preheat, eliminating the long waiting time for hot water!
Safety Intelligence Reliable - This instant hot water heater has multiple protection functions. IPX4 waterproof, water and electricity isolation, leakage protection, dry boil protection, and automatic power off under overheating and inactivity. On demand water heater with LCD digital display, intelligent detection of working status, and performance. The thermal efficiency of electric hot water heater is as high as 98%, allowing you to enjoy hot water at any time and save energy.
Top 25
Best Water Heaters
Best for Rheem
Best for Inline
Best for Tanked
Best for Electric
Best for Under Sink
Best for 120 Volt
Best for Rheem
Best for 10 Gallon
Best for Takagi
Best for Noritz
Best for Rheem
Best for FOGATTI
Best for GASLAND
Best for Eccotemp
Best for AO Smith
Best for 3 GPM
Best for 4 GPM
Best for 5 GPM
Best for 7 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 14 GPM
Best for 15 GPM
Rheem 3.5kW 120V Point of Use Thermostatic Tankless Electric Water Heater
Rheem
RTEX-04T
3.0 x 6.0 x 6.0 inches
4.0 Pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Eagle Point [S/N Recorded] | - | ❌ | ❌ | ❌ |
| Amazon.com | - | ❌ | ❌ | ❌ |
| Valley Deals AZ | - | ❌ | ❌ | ❌ |
| Profitwise Brands | - | ❌ | ❌ | ❌ |
| eFaucets | 9,547 | ❌ | ❌ | ❌ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
ELECTRICAL REQUIREMENTS: 1 x 30 AMP Double Pole Breaker Required. Product installation hard wired to 120 volts requiring a 30-amp breaker.
SAVES SPACE: Ideal for low flow point-of-use applications, such as in a bathroom, office breakroom, wet bar, or garage. The compact size of the water heater is up to 98% smaller than a standard electric water heater.
Top 26
Best for Rheem
Best for Inline
Best for Tanked
Best for Electric
Best for Rheem
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for Rheem
Best for EcoSmart
Best for AO Smith
Best for 5 GPM
Best for 6 GPM
Best for 8 GPM
Best for 14 GPM
Best for 15 GPM
Rheem 6.5kW 240V Point of Use Thermostatic Tankless Electric Water Heater
Rheem
RTEX-06T
3.0 x 6.0 x 6.0 inches
4.0 Pounds
Highly Efficient
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
| Valley Deals AZ | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Trena's Liquidation LLC | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
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
Top 27
Best Water Heaters
Best for CAMPLUX
Best for Gas Powered
Best for LP
Best for Propane Liquid
Best for Outdoor
Best for Propane
Best Gas Water Heaters
Best for 80 Gallon
Best for Tankless
Best Tankless Water Heaters
Best for FOGATTI
Best for Eccotemp
Best for CAMPLUX
Best for 3 GPM
Best for 5 GPM
Best for 6 GPM
Best for 7 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 14 GPM
Best for 15 GPM
Camplux Tankless Water Heater, 1.32 GPM Portable Propane Outdoor Camping Water Heater, 5L, AY132, White
CAMPLUX ENJOY OUTDOOR LIFE
AY132
14.8 x 11.42 x 4.33 inches
10.0 Pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Camplux | - | ✅ | ✅ | ✅ |
Features
Lightweight, Compact & Portable Design: The 10 pounds lightweight portable water heater's folding handle keeps it out of the way and enables easy setup outside.
Flow Rate & Temperature Specification: The temperature raise is 114.8℉ (46℃) at its highest point and 46.4℉ (8℃) is at its lowest point of 1.32 GPM. Also, 1.32 gallons of hot water can be produced per minute at the flow rate of 1.32 GPM.
Rinnai RUCS65IP Tankless Hot Water Heater, 6.5 GPM, Propane, Indoor Installation
Rinnai
RUCS65iP
22.0 x 14.5 x 35.0 inches
62.0 Pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| eFaucets | 9,547 | ❌ | ❌ | ❌ |
Features
Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
Top 10 12 GPM Tankless Water Heaters - Verified to Buy (October 2026)
- 1. New Upgrade 12kW Tankless Water Heater Electric, 240 Volt On...
- 2. Wintemp Tankless Water Heater Electric 12kW, 240 Volt On Demand...
- 3. Andeman RV Tankless Water Heater 55,000 BTU 2.9GPM Instant Hot...
- 4. Camplux 2.64 GPM Propane Portable Gas Water Heater, Outdoor Tankless...
- 5. 14kW Tankless Water Heater Electric, ORBEK On Demand Instant Hot...
- 6. Ranein 12L Portable Propane Water Heater, Outdoor Up to 3.18...
- 7. Westinghouse 14kW Tankless Water Heater Electric 240V, Wifi, ETL, Gray
- 8. CAMPLUX Portable Tankless Water Heater 55,000 BTU, 2.11 GPM Propane...
- 9. MIZUDO Tankless Water Heater Propane, 199,000 BTU, Indoor Installation, Max...
- 10. Portable Tankless Water Heater, Camplux 1.58 GPM Outdoor Propane Hot...
Top 10 12 GPM Tankless Water Heaters Brands on Amazon
Here is the list of top-rated brands that were evaluated by CherryPicks.
- PeiXWming
- WINTEMP
- Andeman
- CAMPLUX ENJOY OUTDOOR LIFE
- Orbek
- Ranein
- Westinghouse
- MIZUDO
- Eyoo
- Baococo
Related 12 GPM Tankless Water Heaters Guides
For more personalized 12 GPM Tankless Water Heaters guides, Check those pages,
GPM
Top 10 12 GPM Tankless Water Heaters Sellers: CPR Seller Rank List
CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.
- 1. eFaucets : 7,127 Yearly Feedback , Avg. Ratings 4.4
- 2. Camplux : 2,742 Yearly Feedback , Avg. Ratings 4.7
- 3. Plumber's Paradise : 2,222 Yearly Feedback , Avg. Ratings 4.8
- 4. Gasland : 1,802 Yearly Feedback , Avg. Ratings 4.6
- 5. MTL Retailers : 499 Yearly Feedback , Avg. Ratings 4.1
- 6. Mizudo Home Comfort Direct : 404 Yearly Feedback , Avg. Ratings 4.7
- 7. Amazon.com : 386 Yearly Feedback , Avg. Ratings 4.7
- 8. Westinghouse Home Comfort Direct : 268 Yearly Feedback , Avg. Ratings 4.8
- 9. Mega Mart Warehouse : 218 Yearly Feedback , Avg. Ratings 3.7
- 10. PEACHSTATESTEALSANDDEALS : 180 Yearly Feedback , Avg. Ratings 4.2
| Rank | Name | Yearly Feedbacks | Avg. Ratings |
|---|---|---|---|
| 🥇 | eFaucets | 7,127 | 4.4 |
| 🥈 | Camplux | 2,742 | 4.7 |
| 🥉 | Plumber's Paradise | 2,222 | 4.8 |
| 4 | Gasland | 1,802 | 4.6 |
| 5 | MTL Retailers | 499 | 4.1 |
| 6 | Mizudo Home Comfort Direct | 404 | 4.7 |
| 7 | Amazon.com | 386 | 4.7 |
| 8 | Westinghouse Home Comfort Direct | 268 | 4.8 |
| 9 | Mega Mart Warehouse | 218 | 3.7 |
| 10 | PEACHSTATESTEALSANDDEALS | 180 | 4.2 |
[Get] 12 GPM Tankless Water Heaters Deals (✅Exclusively for Prime)
What does "Amazon Fulfilled" Mean?
Amazon Fulfilled refers to products handled by Amazon's logistics, which indicates that the product is stored, packed, and shipped by Amazon from one of its fulfillment centers.
When you order a product that is "Amazon Fulfilled," Amazon takes care of the storage, packing, shipping, and customer service for that product. This often ensures quicker delivery and better customer service compared to products that are not fulfilled by Amazon. It also means that the product is eligible for Amazon's return policy.
What does "Prime" Mean?
"Prime" refers to Amazon Prime Member (Join Amazon Prime Now), which indicates eligibility for Prime benefits. When you see "Prime" next to a product on Amazon, This generally means that if you are an Amazon Prime member, you can get free two-day shipping on that product, and sometimes even same-day or one-day shipping depending on your location.
Prime members also have access to other benefits, including 2-Day Shipping, Exclusive Member Deals, Prime Video, Buy With Prime, Amazon Music, Prime Gaming, and more.
Shop Prime 12 GPM Tankless Water Heaters Deals
What does "Free Shipping" Mean?
"Free Shipping" means that you will not be charged additional fees for the shipping of that product. However, unlike "Prime," which usually guarantees fast two-day shipping, "Free Shipping" doesn't necessarily mean fast shipping.
Sometimes there might be a minimum purchase requirement to qualify for free shipping if you are not a Prime member. For Prime members, the "Free Shipping" usually refers to the free two-day shipping that is one of the benefits of the Prime membership.
Why Should You Trust Us?
Now hundreds and thousands of Rough Plumbing supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best 12 GPM Tankless Water Heaters to buy for new October 2026?
CherryPicks’s Methodology for Evaluating 12 GPM Tankless Water Heaters
We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Rough Plumbing items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.
We collected and analyzed 306 of 12 GPM Tankless Water Heaters reviews based on our selection criteria. It helped us shortlist the top qualified and rated 12 GPM Tankless Water Heaters for Rough Plumbing, We found that most customers choose 12 GPM Tankless Water Heaters with an average price of $281.05, and the top brands are Westinghouse, CAMPLUX ENJOY OUTDOOR LIFE, GASLAND, Rheem And Rinnai.
Then our expert-level editors reviewed all those quality items and selected the top 28 12 GPM Tankless Water Heaters for you, We have researched hundreds of sellers and picked the top sellers for Rough Plumbing, including Amazon Resale, eFaucets, Camplux, Plumber's Paradise, Gasland, MTL Retailers, Mizudo Home Comfort Direct, Amazon.com, Westinghouse Home Comfort Direct, Mega Mart Warehouse, PEACHSTATESTEALSANDDEALS And AXY Co. The New Upgrade 12kW Tankless Water Heater Electric... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 7 consumers with an average rating of 3.4.
We've helped a lot of satisfied users get the right Tools & Home Improvement product based on their needs, and save lots of time for them to pick 12 GPM Tankless Water Heaters to buy.
Hunter Lambrick is a contributing writer on the Cherrypicksreview platform who specializes in writing articles on outdoor events and home tool products. He has been doing this for a while now and has developed a wealth of experience in it.