Top 28 8 GPM Tankless Water Heaters on Amazon (Verified You can Buy)
Top 1
Ranein 8L Propane Tankless Water Heater, Outdoor Up to 2.11 GPM, 48,000 BTU On-Demand Instant Hot Water Heater
Ranein
TMYD-01020120
12.6 x 12.6 x 20.5 inches
13.3 Pounds
Ratings for Ranein (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ranein Store | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Compact-Portable Dimensions: Outdoor water heater measures 20.5" x 6.1" x 12.6" at 13.3 lbs. Space-saving design installs anywhere. Runs on 3.6 PSI - perfect for low-pressure rural camping!
48,000 BTU 8L Tankless Water Heater: Provides hot water quickly! Delivers 2.11 GPM of hot water per minute and heats to 55°F-109°F (13°C-43°C) for patios, cabins and campsites. No preheating required.
Top 2
Tankless Water Heater Electric 8KW, Compact on Demand Instant Hot Water Heater Electric for Under Sink, Shower 240V.
ObigaVc
RE8K
6.22 x 6.22 x 9.06 inches
3.53 Pounds
Ratings for ObigaVc (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Obiga_Official | - | ❌ | ❌ | ❌ |
Features
Instant On Demand Hot Water: Powered by 8 kW heating unit, our under sink water heater delivers instant, stable hot water within seconds, 85 °F-131 °F adjustable. Simply activate your tap for comfort of hot water whenever needed, enjoy temperature-controlled flow 24/7
User-Friendly Interface: Our tankless water heater has a LED digital display, real-time water temperature and flow keep you informed. The intuitive touch control panel simplifies temperature adjustments and the temperature auto-recall function reduces repetitive operations
Top 3
Best for Whole House
Best for 80 Gallon
Best for 2 GPM
Best for 4 GPM
Best for 9 GPM
Best for 12 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 4
Best Water Heaters
Best for EcoSmart
Best for Inline
Best for Electric
Best for Compact
Best for Thermostat
Best Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for Stiebel Eltron
Best for EcoSmart
Best for FOGATTI
Best for Eccotemp
Best for AO Smith
Best for 11 GPM
EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW - Quantity 1, 12 x 8 x 4
EcoSmart
ECO 8
4.0 x 8.0 x 12.0 inches
4.75 pounds
99.8%
Ratings for EcoSmart (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| W fashion shop | - | ✅ | ✅ | ✅ |
| MaxWarehouse | 248 | ✅ | ✅ | ✅ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
The product is highly durable
The product is easy to use
190,000 BTU Tankless Water Heater Gas, 8.1 GPM Outdoor Hot Water Heater
Konfino
Natural Gas Max 8.1
24.3 x 15.0 x 8.3 Inches
44.09 pounds
Ratings for Konfino (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| konfino | - | ❌ | ❌ | ❌ |
Features
WHOLE-HOME HOT WATER: This high-efficiency natural gas tankless water heater delivers 190,000 BTU and 8.1 GPM instant hot water, perfect on-demand water heater for whole-house use. Supplies 3 showers + 3 faucets at once, ultra-low 0.79 GPM min flow works even with weak water pressure.
SMART GAS CONTROL: Adjust your tankless gas water heater via wired controller (95°F–149°F) with ±1°F accuracy. Remote control water heater setup means precise on-demand heating from anywhere in the house.
Top 6
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 Tankless Water Heaters
Best for Takagi
Best for Noritz
Best for Rheem
Best for Rinnai
Best for EcoSmart
Best for FOGATTI
Best for GASLAND
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 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 12 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 | - | ❌ | ❌ | ❌ |
Features
ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
Top 7
Best for Tanked
Best for Compact
Best for 2 GPM
Best for 10 GPM
Best for 11 GPM
Best for 14 GPM
WINTEMP 11kW Electric Tankless Water Heater 240V, Endless On-Demand Hot Water Heater, LED Temperature Display, Self-Modulating Energy Saving, Space-Saving Design, Ideal for Bathroom and Kitchen
WINTEMP
YQ-WN11K
9.7 x 9.7 x 14.0 inches
8.6 pounds
Ratings for WINTEMP (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| GREENTECH APPLIANCE | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Important Note: Ensure this tankless water heater meets your installation requirements. It is rated at 11KW - 240 Volts with a maximum amperage of 46A. It requires 1 x 50 Amp DP breakers and 8# AWG wiring with ground. The unit dimensions are 9.7” (W) x 14 ” (H) x 3.4” (D), the water connection is 1/2" NPT
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. The digital temperature display ranges from 86°F to 140°F. Its maximum hot water output is 2.6 gallons per minute, It is ideal for installation under bathroom faucets and sinks
Rinnai RE180eN Non-Condensing Natural Gas Tankless Water Heater
Rinnai
REU-VE2432WD-US-N
10.77 x 14.05 x 24.64 inches
53.1005 Pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,547 | ❌ | ❌ | ❌ |
Features
Smart Design: Improved design of tankless hot water heater only heats when necessary to conserve energy; Speeds installation and enhances serviceability with a cleaner internal layout; LED screen provides service reminders and error codes
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This outdoor non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 6.9 GPM (5 fixtures at once)
Top 9
Best for CAMPLUX
Best for Gas Powered
Best for Outdoor
Best for Propane
Best for Eccotemp
Best for CAMPLUX
Best for 6 GPM
Best for 10 GPM
Best for 12 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 10
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 Takagi
Best for Rheem
Best for FOGATTI
Best for Eccotemp
Best for AO Smith
Best for 2 GPM
Best for 7 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 12 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 11
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 Rheem
Best for Rinnai
Best for AO Smith
Best for 2 GPM
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 12 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
99.8% Energy efficient
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
8L Tankless Water Heater Propane with Digital Display 2.11 GPM 40824 BTU
Baococo
YYJ24046-8
12.6 x 12.6 x 14.57 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 40,824 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 40824 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 2.11 gallons per minute of continuous hot water flow, perfect for quick showers, dishwashing, or pet cleaning.
27kW Tankless Water Heater Electric, ThermoMate 240 Volt Instant On-Demand Hot Water Heater with Touch Control, Max 6.6 GPM Self-Modulating, ETL Certified for Residential Indoor Shower
thermomate
EH270
13.15 x 13.15 x 17.09 inches
19.0 Pounds
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
Electrical & Installation Requirements: Before purchasing, please ensure your home's main panel has a total electrical capacity of at least 150 Amps. This 27kW unit requires 3 x separate 40 Amp double-pole breakers and 3 x sets of 8 AWG copper wires, and standard 3/4" NPT water connections for proper installation
Instant & Endless Hot Water: Powering up to 6.6 GPM of on-demand hot water, the ThermoMate 240V electric tankless water heater ensures a continuous supply without running out. Perfect for running up to 3-4 plumbing fixtures simultaneously (such as 2 shower and a bathroom sink) depending on your inlet water temperature
Top 14
Best for Inline
Best for Gas Powered
Best for LP
Best for Digital
Best for Outdoor
Best for Indoor
Best for Propane
Best for 20 Gallon
Best for Takagi
Best for Noritz
Best for EcoSmart
Best for FOGATTI
Best for GASLAND
Best for Eccotemp
Best for AO Smith
Best for 7 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 12 GPM
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.
27kW Tankless Water Heater Electric, NOVIEEX 240V 3s Instant Hot Water Heater, Flow Rate Max 7.4 GPM, Supply for 3-4 Points, Indoor Installation, Heavy Duty Ideal for Whole House Use
NOVIEEX
DS-18
14.13 x 14.13 x 15.86 Inches
Ratings for NOVIEEX (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| NOVIEEX Global | - | ❌ | ❌ | ❌ |
Features
【WHOLE HOUSE HEAVY DUTY】 The NOVIEEX 27kW tankless hot water heater electric is a heavy-duty solution custom-built to satisfy full household demands. Designed to seamlessly supply larger homes, its streamlined wall-mount enclosure (14.13" x 15.86" x 3.18") saves 80% more space than mammoth 50+ gallon storage tanks, inserting perfectly into narrow closets or compact utility spaces.
【3-4 MULTI-POINT LUXURY FLOW】 It delivers a massive, industry-topping water flow of up to 7.4 Gallons Per Minute (GPM). This high-velocity output effortlessly services 3 to 4 water applications simultaneously. Fill a grand whirlpool bathtub, run the washing machine, and support multiple master showers concurrently without a single drop in temperature or water pressure.
CAMPLUX Climatech 7 170,000 BTU(Real Data) Tankless Water Heater Gas, 6.86 GPM(Up to 7.6 GPM), CSA Certified On Demand Tankless Hot Water Heater Natural Gas Indoor for Whole House, 4-6 Outlets
CAMPLUX ENJOY OUTDOOR LIFE
CA686WNG
14.3 x 14.3 x 7.3 Inches
37.5 pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Camplux | - | ❌ | ❌ | ❌ |
| Woot | 115 | ❌ | ❌ | ❌ |
Features
𝐖𝐡𝐨𝐥𝐞-𝐇𝐨𝐮𝐬𝐞 𝐆𝐚𝐬 𝐇𝐨𝐭 𝐖𝐚𝐭𝐞𝐫 𝐏𝐨𝐰𝐞𝐫: 170,000 BTU(Real Data, No Exaggeration) natural gas water heater delivers 6.86 GPM - runs 6 points simultaneously. Up to 7.6 GPM, each delivering 105°F water at a flow rate of 2 GPM, based on an inlet water temperature of 65°F. Built-in -20°F freeze protection with automatic drain assist. Oxygen-free copper heat exchanger Improved heat transfer efficiency.
𝐈𝐧𝐬𝐭𝐚𝐧𝐭 𝐆𝐚𝐬 𝐇𝐨𝐭 𝐖𝐚𝐭𝐞𝐫 𝐖𝐢𝐭𝐡𝐢𝐧 𝟐 𝐒𝐞𝐜𝐨𝐧𝐝𝐬: With 170,000 BTU output and 4 flame settings, the gas hot water heater adjusts to seasonal needs, preventing overheating in summer while saving energy for a comfortable, eco-friendly shower. On-demand gas water heater eliminates 30-minute tank preheating. 80% faster ignition than standard NG models. Precision flame control prevents temperature fluctuation.
Top 17
Best for Rheem
Best for Tanked
Best for Electric
Best for Rheem
Best Tankless Water Heaters
Best for Noritz
Best for Rheem
Best for Stiebel Eltron
Best for EcoSmart
Best for Eccotemp
Best for 5 GPM
Best for 6 GPM
Best for 7 GPM
Best for 9 GPM
Best for 10 GPM
Best for 14 GPM
Best for 15 GPM
Rheem 8kW 240V Tankless Electric Water Heater
Rheem
RTEX-08
12.6 x 8.25 x 3.63 inches
8.0 Pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| FFON SSON | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Binary Edge | - | ❌ | ❌ | ❌ |
Features
ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
Ranein Natural Gas Tankless Water Heater, Outdoor Max 8.5 GPM, 190,000 BTU Instant Hot Water Heater
Ranein
RHO19K-NG
15.08 x 15.08 x 24.25 Inches
44.0 Pounds
Ratings for Ranein (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ranein Store | - | ❌ | ❌ | ❌ |
Features
Fans Placed Underneath: It will be more secure in terms of safety, and no smoke backflow will occur. The blower has large power and can automatically adjust the rotating speed according to the change of external wind pressure and the change of water temperature to provide sufficient oxygen for gas combustion, ensuring full combustion and safer use. Low noise and longer service life.
No Waiting Required: Unlike traditional tank water heaters, tankless water heaters eliminate the need for a 30-minute preheating wait time, allowing you to have unlimited hot water on demand.
Top 19
WINTEMP 8kW 240V Tankless Water Heater Electric, On Demand Instant Hot Water Heater, Up to 1.9 GPM, with LED Temperature Display, Self-Modulating Technology ETL Certified
WINTEMP
WN08
9.7 x 9.7 x 14.1 inches
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. It is rated at 8KW - 240 Volts with a maximum amperage of 33A. It requires 1 x 40 Amp DP breakers and 8# AWG wiring with ground. The unit dimensions are 9.7” (W) x 14 ” (H) x 3.4” (D), the water connection is 1/2" NPT(Hardwired installation is required)
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 1.9 gallons per minute. It is perfect for sinks, office breakrooms, point-of-use and low-flow applications, and can also be used as a booster heater
Top 20
Best for Boiler
VEVOR Tankless Water Heater Electric, 13.8KW 240V Black Instant Water Heater, Digital Temperature Display, Child Security Lock, On Demand for Bathroom, Kitchen, Shower, Mall, Salon
VEVOR
JN13
9.7 x 3.3 x 14.0 inches
8.82 Pounds
Ratings for VEVOR (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| VEMIXO | - | ❌ | ❌ | ❌ |
| Amazon.com | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Energy Efficiency: You're choosing a greener solution for your hot water needs. Forget about preheating! The electric water heater utilizes a 13.8kw heating system delivers endless hot water in seconds at temperatures ranging from 86-140℉ or higher. Before purchasing, please carefully review the product details (voltage, power, additional accessories and parts required, installation information, etc.)
Instant Hot Water: The water heater is equipped with a high-performance cast aluminum heater, which effectively separates water and electricity, scale and corrosion resistant. Our electric water heater delivers hot water instantly, saving you time and minimizing water wastage. You can start enjoying ultimate relaxing and comfort in no time!
Top 21
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 Rheem
Best for EcoSmart
Best for AO Smith
Best for 3 GPM
Best for 5 GPM
Best for 7 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
Best for 12 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
Top 22
Tankless Water Heater Electric 8kW 240V, On Demand Instant Hot Water
WINTEMP
YQ-WN8K
9.7 x 9.7 x 14.0 inches
7.9 pounds
High Efficiency
Ratings for WINTEMP (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| GREENTECH APPLIANCE | - | ❌ | ❌ | ❌ |
Features
Important Note: Ensure this tankless water heater meets your installation requirements. It is rated at WINTEMP 8KW - 240 Volts with a maximum amperage of 33A. It requires 1 x 40 Amp DP breakers and 10# AWG wiring with ground. The unit dimensions are 9.7” (W) x 14 ” (H) x 3.4” (D), the water connection is 1/2" NPT
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. The digital temperature display ranges from 86°F to 140°F. Its maximum hot water output is 1.9 gallons per minute, It is ideal for installation under bathroom faucets and sinks
Wintemp Tankless Water Heater Electric 9kW, 240 Volt On Demand Instant Hot Water Heater, Within 1℉ Stable Temp, Up to 2.2 GPM, WiFi Control, ETL Certified, Eco, WM09
WINTEMP
WM09
8.1 x 8.1 x 12.2 Inches
9.6 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 WM9 model is rated at 9kW (240V) with a maximum current of 37.5A. It requires 1 × 40 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 2.2 GPM of steady hot water with temperature control maintained within ±1°F. Ideal for small sinks, office breakrooms, and other point-of-use or low-flow applications, and can also be used as a booster heater
Top 24
Best for Gas Powered
Best Gas Water Heaters
Best for 30 Gallon
Best for Tankless
Best for Rheem
Best for 4 GPM
Best for 5 GPM
Best for 6 GPM
Best for 7 GPM
Ranein Natural Gas Tankless Water Heater, Indoor Max 8.5 GPM, 190,000 BTU Instant Hot Water Heater
Ranein
RH19K-NG
15.08 x 15.08 x 24.25 Inches
42.0 pounds
Ratings for Ranein (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Ranein Store | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Fans Placed Underneath: It will be more secure in terms of safety, and no smoke backflow will occur. The blower has large power and can automatically adjust the rotating speed according to the change of external wind pressure and the change of water temperature to provide sufficient oxygen for gas combustion, ensuring full combustion and safer use. Low noise and longer service life.
No Waiting Required: Unlike traditional tank water heaters, tankless water heaters eliminate the need for a 30-minute preheating wait time, allowing you to have unlimited hot water on demand.
Top 25
Best for EcoSmart
Electrolux 8kW Tankless Water Heater Electric 240v Under Sink
Electrolux
8kW
8.1 x 8.1 x 6.9 Inches
Ratings for Electrolux (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Electrolux Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
𝐈𝐧𝐬𝐭𝐚𝐧𝐭 𝐇𝐨𝐭 𝐖𝐚𝐭𝐞𝐫 𝐇𝐞𝐚𝐭𝐞𝐫 24𝟎𝐕: On Demand Water Heater No waits! 8kW heating tech delivers stable, continuous flow ideal for handwashing, dish rinsing, and sink use – no preheating tanks needed. With a 77°F temperature rise, it provides 1.97 GPM and a maximum temperature of 104°F
𝐔𝐧𝐝𝐞𝐫 𝐒𝐢𝐧𝐤 𝐖𝐚𝐭𝐞𝐫 𝐇𝐞𝐚𝐭𝐞𝐫: Fits tight spaces (6.9"x8.1"x2.5") with 1/2" NPT connections. Requires only one dedicated 40A circuit – DIY-friendly setup! takes up 90% less space than traditional water heaters
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.
WINTEMP 36kW Tankless Electric Water Heater 240V, Instant On-Demand Endless Hot Water, Up to 8.7 GPM, LED Temperature Display, Whole House Supply, WiFi Control, ETL Certified
WINTEMP
WN36
13.7 x 13.7 x 21.1 Inches
36.05 Pounds
Ratings for WINTEMP (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| WINTEMP | - | ❌ | ❌ | ❌ |
Features
Important Note: Please ensure this tankless water heater meets your installation requirements, 300 Amp Household Service Recommended. The WN36 model is rated at 36KW (240V) with a maximum current draw of 150A. It requires 4 x 40 Amp double-pole (DP) breakers and 4 x 8/2 AWG cables with ground. A 300A household power supply is recommended. Unit dimensions: 13.7” (W) x 21.1” (H) x 5.3” (D). Water connection: 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, a consistently stable temperature, and optimal power usage. With a maximum hot water output of 8.7 gallons per minute, it’s ideal for residential showers — no need to wait for preheating, no risk of running out of hot water, and no more temperature fluctuations during your shower. Provides continuous hot water for showers and everyday household use
Top 28
Best Gas Water Heaters
Best for Tankless
Best for Takagi
Best for AO Smith
Best for 2 GPM
Best for 4 GPM
Best for 5 GPM
Best for 6 GPM
Best for 9 GPM
Ranein Propane Gas Tankless Water Heater, Indoor Max 8.5 GPM, 190,000 BTU Instant Hot Water Heater
Ranein
RH19K-LPG
15.08 x 15.08 x 24.25 inches
42.0 Pounds
Ratings for Ranein (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Ranein Store | - | ❌ | ❌ | ❌ |
Features
Fans Placed Underneath: It will be more secure in terms of safety, and no smoke backflow will occur. The blower has large power and can automatically adjust the rotating speed according to the change of external wind pressure and the change of water temperature to provide sufficient oxygen for gas combustion, ensuring full combustion and safer use. Low noise and longer service life.
No Waiting Required: Unlike traditional tank water heaters, tankless water heaters eliminate the need for a 30-minute preheating wait time, allowing you to have unlimited hot water on demand.
Top 10 8 GPM Tankless Water Heaters - Verified to Buy (October 2026)
- 1. Ranein 8L Propane Tankless Water Heater, Outdoor Up to 2.11...
- 2. Tankless Water Heater Electric 8KW, Compact on Demand Instant Hot...
- 3. 18kW Tankless Water Heater Electric 240V WINTEMP, On Demand Instant...
- 4. EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW - Quantity...
- 5. 190,000 BTU Tankless Water Heater Gas, 8.1 GPM Outdoor Hot...
- 6. Rheem 11kW 240V Tankless Electric Water Heater
- 7. WINTEMP 11kW Electric Tankless Water Heater 240V, Endless On-Demand Hot...
- 8. Rinnai RE180eN Non-Condensing Natural Gas Tankless Water Heater
- 9. Camplux 2.64 GPM Propane Portable Gas Water Heater, Outdoor Tankless...
- 10. Rheem 3.5kW 120V Point of Use Thermostatic Tankless Electric Water...
Top 10 8 GPM Tankless Water Heaters Brands on Amazon
Here is the list of top-rated brands that were evaluated by CherryPicks.
- Ranein
- ObigaVc
- WINTEMP
- EcoSmart
- Konfino
- Rheem
- Rinnai
- CAMPLUX ENJOY OUTDOOR LIFE
- Baococo
- thermomate
Related 8 GPM Tankless Water Heaters Guides
For more personalized 8 GPM Tankless Water Heaters guides, Check those pages,
GPM
Top 10 8 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. Woot : 266,742 Yearly Feedback , Avg. Ratings 4.8
- 2. MaxWarehouse : 147,519 Yearly Feedback , Avg. Ratings 4.7
- 3. eFaucets : 7,127 Yearly Feedback , Avg. Ratings 4.4
- 4. VEMIXO : 3,756 Yearly Feedback , Avg. Ratings 4.1
- 5. Camplux : 2,742 Yearly Feedback , Avg. Ratings 4.7
- 6. Plumber's Paradise : 2,222 Yearly Feedback , Avg. Ratings 4.8
- 7. MTL Retailers : 499 Yearly Feedback , Avg. Ratings 4.1
- 8. Amazon.com : 386 Yearly Feedback , Avg. Ratings 4.7
- 9. ThermoMate Official : 375 Yearly Feedback , Avg. Ratings 4.7
- 10. W fashion shop : 264 Yearly Feedback , Avg. Ratings 4.8
| Rank | Name | Yearly Feedbacks | Avg. Ratings |
|---|---|---|---|
| 🥇 | Woot | 266,742 | 4.8 |
| 🥈 | MaxWarehouse | 147,519 | 4.7 |
| 🥉 | eFaucets | 7,127 | 4.4 |
| 4 | VEMIXO | 3,756 | 4.1 |
| 5 | Camplux | 2,742 | 4.7 |
| 6 | Plumber's Paradise | 2,222 | 4.8 |
| 7 | MTL Retailers | 499 | 4.1 |
| 8 | Amazon.com | 386 | 4.7 |
| 9 | ThermoMate Official | 375 | 4.7 |
| 10 | W fashion shop | 264 | 4.8 |
[Get] 8 GPM Tankless Water Heaters Deals (✅Exclusively for Prime)
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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.
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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 8 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 8 GPM Tankless Water Heaters to buy for new October 2026?
CherryPicks’s Methodology for Evaluating 8 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 8 GPM Tankless Water Heaters reviews based on our selection criteria. It helped us shortlist the top qualified and rated 8 GPM Tankless Water Heaters for Rough Plumbing, We found that most customers choose 8 GPM Tankless Water Heaters with an average price of $317.32, and the top brands are VEVOR, CAMPLUX ENJOY OUTDOOR LIFE, Electrolux, EcoSmart, Rheem, thermomate And Rinnai.
Then our expert-level editors reviewed all those quality items and selected the top 28 8 GPM Tankless Water Heaters for you, We have researched hundreds of sellers and picked the top sellers for Rough Plumbing, including Amazon Resale, Woot, MaxWarehouse, eFaucets, VEMIXO, Camplux, Plumber's Paradise, MTL Retailers, Amazon.com, ThermoMate Official, W fashion shop And Mega Mart Warehouse. The Ranein 8L Propane Tankless Water Heater, Outdoo... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 32 consumers with an average rating of 4.2.
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 8 GPM Tankless Water Heaters to buy.
Nathaniel Kapman owns a small store where he sells tools for home improvement. From interacting with these tools over the years, he has developed a wealth of experience and can tell which tool is good for what. However, on this platform, he does not use intuition. Instead, he follows the laid down guidelines, making his reviews and guide top-notch.