Top 28 9 GPM Tankless Water Heaters on Amazon (Verified You can Buy)
Rheem Natural Gas Condensing Tankless Water Heater Indoor Up To 9 GPM, 180,000 BTUs Continuous Super High Efficient Hot Water
Rheem
RTGH-90DVLN-3
9.8 x 17.7 x 23.7 Inches
59.88 pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Flow rate of 0.4 - 9 GPM
Available temperature settings range from 100 to 140F (default setting of 120F)
Top 2
9kW Tankless Water Heater Electric 240V, On-Demand Instant Hot Water
WINTEMP
WM09V
12.2 x 12.2 x 8.5 inches
10.0 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 WM09V model is rated at 9kW (240V) with a maximum current of 37.5A. It requires 1 × 40 Amp double-pole breakers and 1 sets of 8 AWG wiring for installation, with 1/2" NPT water connections
Endless Hot Water: Advanced flow control technology automatically maintains water temperature, ensuring maximum efficiency and consistently comfortable hot water. It delivers up to 2.2 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-Ensure your hot water is never interrupted. In warmer southern regions, it is more suitable for sinks, office breakrooms, point-of-use, and low-flow applications, and can also be used as a booster heater. Ideal for providing hot water to faucets
Top 3
Best for Rheem
Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Rheem
RTGH-95DVLN-3
9.8 x 17.7 x 23.7 inches
59.88 pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Flow rate of 0.4 - 9.5 GPM
Available temperature settings range from 100 to 140F (default setting of 120F)
Top 4
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 8 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 5
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 8 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
Top 6
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 8 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 7
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 8 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 8
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 8 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
Top 9
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 8 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 10
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 8 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.
Top 11
Best for Rheem
Best for Rinnai
Best for EcoSmart
Best for 2 GPM
Best for 3 GPM
Best for 4 GPM
Best for 6 GPM
Best for 12 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 12
Best for Rheem
Best for Indoor
Best for High Efficiency
Best for Rheem
Best for Rheem
Best for 11 GPM
Rheem RRTGH95DVLP3701178 Rheem RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater Stainless Steel
Rheem
RTGH-95DVLP-3
9.8 x 17.7 x 23.7 Inches
59.88 pounds
0.82
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Flow rate of 0.4 - 9.5 GPM
Available temperature settings range from 100 to 140F (default setting of 120F)
Top 13
Best for Gas Powered
Best for Whole House
Best for High Efficiency
Best for 50 Gallon
Best for 75 Gallon
Best for 7 GPM
Best for 10 GPM
Best for 11 GPM
MIZUDO Natural Gas Tankless Water Heater, 199,000 BTU, Indoor Installation, Max 10.3 GPM, WiFi&APP Control, Non Condensing, High Efficiency for Large Families Residential Whole House
MIZUDO
WCIU-HW199A1G-NG-M0
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 gas tankless 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
Top 14
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 Noritz
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 10 GPM
Best for 11 GPM
Best for 12 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
Rinnai RXP160iN Condensing Smart Sense Tankless Water Heater
Rinnai
RXP160iN
19.0 x 19.0 x 31.0 inches
57.0 pounds
0.97
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,547 | ❌ | ❌ | ❌ |
Features
One Model, Anywhere: This Rinnai tankless water heater is installable indoors or outdoors thanks to our new Versa Vent and powered by either propane or natural gas thanks to a Smart Sense gas control system; RX-OVC vent cap required for outdoor install
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This condensing propane and natural gas tankless water heater from Rinnai is only the size of a small suitcase, but provides up to 9 GPM (6 fixtures at once)
Top 16
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 GASLAND
Best for Eccotemp
Best for CAMPLUX
Best for 2 GPM
Best for 3 GPM
Best for 5 GPM
Best for 6 GPM
Best for 10 GPM
Best for 11 GPM
Best for 12 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.
Top 17
Best for Rheem
Best for Inline
Best for Tanked
Best for Residential
Best for Rheem
Best for Rheem
Best for EcoSmart
Best for AO Smith
Best for 6 GPM
Best for 15 GPM
Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
Rheem
RTEX-13
12.63 x 8.25 x 3.63 Inches
3.9683 Pounds
at least 99.8% energy efficient
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| CARESAN | - | ✅ | ✅ | ✅ |
| CASA CAYOS | - | ✅ | ✅ | ✅ |
| Miami Water Heater | - | ✅ | ✅ | ✅ |
| PRODUCT X MAS | 9,301 | ✅ | ✅ | ✅ |
| Bullit Sales | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| Direct Supply Store | 5,162 | ❌ | ❌ | ❌ |
| USA-Fast-Delivery LLC | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
External adjustable digital thermostatic control with LED display (+/1 degree accuracy
Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
Rinnai CU160iN Commercial Natural Gas Condensing Tankless Water Heater, Indoor Installation, 9 GPM
Rinnai
CU160iN
22.05 x 14.76 x 33.86 inches
72.3 Pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Westcoastsales | - | ❌ | ❌ | ❌ |
Features
Energy and Space Efficient Tankless Hot Water Heater: Our commercial hot water heaters feature a space-saving design that conserves energy as it heats only when necessary; Multiple venting options offer installation flexibility
Optimal Water Pressure: This tankless water heater offers a high-performance 9 GPM hot water flow rate for the powerful, constant stream your business needs
Top 19
Best for Whole House
Best for 80 Gallon
Best for 2 GPM
Best for 4 GPM
Best for 8 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
NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 9 GPM, 160,000 BTU
Rinnai
RX160iN
19.0 x 19.0 x 31.0 inches
54.0 pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,547 | ❌ | ❌ | ❌ |
| Standard Plumbing Supply | - | ❌ | ❌ | ❌ |
Features
One Model, Anywhere: This Rinnai tankless water heater is installable indoors or outdoors thanks to our new Versa Vent and powered by either propane or natural gas thanks to a Smart Sense gas control system; RX-OVC vent cap required for outdoor install
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This condensing propane and natural gas tankless water heater from Rinnai is only the size of a small suitcase, but provides up to 9 GPM (6 fixtures at once)
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 22
Best for Rinnai
Best for Indoor
Best for High Efficiency
Best for Rinnai
Best for Tankless
Best for Rinnai
Rinnai RE199iN Non-Condensing Natural Gas Tankless Water Heater, Up to 7.6 GPM, Indoor Installation, 199,000 BTU
Rinnai
REU-VE2737FFD-US-N
10.77 x 14.05 x 27.28 inches
52.1 Pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Rhino Supply | - | ✅ | ✅ | ✅ |
| Amazon.com | - | ✅ | ✅ | ✅ |
| eFaucets | 9,547 | ❌ | ❌ | ❌ |
| Voomi Supply | - | ❌ | ❌ | ❌ |
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 non-condensing indoor tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 7.6 GPM (6 fixtures at once)
Top 23
Best Water Heaters
Best for Compact
Best for Waterproof
Best for 2 GPM
Best for 3 GPM
Best for 5 GPM
Best for 11 GPM
Westinghouse 11kW Tankless Water Heater Electric 240V, Wifi, ETL, Gray
Westinghouse
WET011A0G
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 requires a dedicated 60A double-pole breaker and 8 AWG wire at 240V for stable, safe operation. With 1/2" NPT connections and a compact wall-mountable design 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 electric.
【3-Second Instant Heating & On Demand Hot Water】This 11kW tankless water heater 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 2.6 GPM—ideal for a single water point, perfect for a shower. This on demand hot water heater brings instant hot water to your daily routine. That's the reliable performance you expect from a Westinghouse electric tankless water heater 240V.
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 EcoSmart
Best for FOGATTI
Best for GASLAND
Best for Eccotemp
Best for AO Smith
Best for 2 GPM
Best for 11 GPM
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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 for Inline
Best for Indoor
Best for Whole House
Best for Residential
Best for High Efficiency
Best Gas Water Heaters
Best for 30 Gallon
Best for 40 Gallon
Best for 50 Gallon
Best for 60 Gallon
Best for 75 Gallon
Best for 80 Gallon
Best for Tankless
Best for Rinnai
Best for 3 GPM
Best for 4 GPM
Best for 5 GPM
Best for 7 GPM
ThermoMate CZ422NG Natural Gas Tankless Water Heater, Up to 5 GPM 113,000 BTU, High Efficiency Instant On-Demand Hot Water for Whole House Use, Indoor Residential Water Heater with Multi-Point Heating
thermomate
CZ422NG
13.77 x 13.77 x 21.65 inches
22.0 Pounds
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
[Max 5 GPM & 113,000 BTU] - The ThermoMate instant hot water heater can supply two showers simultaneously, each delivering 105°F water at a flow rate of 2 GPM, based on an inlet water temperature of 65°F. No waiting time, no cold water shocks, perfect for busy households. Adopting advanced water flow sensor, the built-in chip can adjust the heating power 20,000 times per second, ensuring that the hot water within ±1℉ fluctuations for a comfortable shower experience.
[Safety & Reliable] - This gas tankless water heater integrates 8 protections: boil-dry, freeze, flame-out, overheating, over-temperature, pipe blockage, high-temperature lock, and excessive air pressure. Equipped with 4 ceramic heating cores, it auto-activates frost protection when temperatures hit 41°F (5℃). The energy-smart system uses minimal electricity to generate gentle warmth, preventing pipe ice buildup without high energy costs.
Top 26
Best for CAMPLUX
Best for Outdoor
Best for CAMPLUX
Best for 3 GPM
Best for 5 GPM
Best for 12 GPM
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
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
NEW Rinnai CX160iN High Efficiency Plus Natural Gas Interior Tankless Water Heater, Up to 9 GPM
Rinnai
CX160iN
30.11 x 18.5 x 30.11 inches
60.001 pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,547 | ❌ | ❌ | ❌ |
| The Portland Group | - | ❌ | ❌ | ❌ |
Features
One Model, Anywhere: This Rinnai tankless water heater is installable indoors or outdoors thanks to our new Versa Vent and powered by either propane or natural gas thanks to a Smart Sense gas control system; RX-OVC vent cap required for outdoor install
Super High Efficiency for Lower Energy Costs: Boasting an impressive thermal efficiency rating of 97%, this tankless water heater optimizes energy usage, helping to significantly reduce operational costs
Top 10 9 GPM Tankless Water Heaters - Verified to Buy (October 2026)
- 1. Rheem Natural Gas Condensing Tankless Water Heater Indoor Up To...
- 2. 9kW Tankless Water Heater Electric 240V, On-Demand Instant Hot Water
- 3. Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt...
- 4. Ranein Propane Gas Tankless Water Heater, Indoor Max 8.5 GPM,...
- 5. Rheem 8kW 240V Tankless Electric Water Heater
- 6. Rheem 3.5kW 120V Point of Use Thermostatic Tankless Electric Water...
- 7. Rheem 11kW 240V Tankless Electric Water Heater
- 8. Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
- 9. Rheem 18kW 240V Tankless Electric Water Heater
- 10. 18L Tankless Water Heater Propane with Digital Display 4.76 GPM...
Top 10 9 GPM Tankless Water Heaters Brands on Amazon
Here is the list of top-rated brands that were evaluated by CherryPicks.
- Rheem
- WINTEMP
- Ranein
- Baococo
- Westinghouse
- MIZUDO
- Orbek
- Rinnai
- CAMPLUX ENJOY OUTDOOR LIFE
- xwdzswgs
Related 9 GPM Tankless Water Heaters Guides
For more personalized 9 GPM Tankless Water Heaters guides, Check those pages,
GPM
Top 10 9 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. Direct Supply Store : 12,760 Yearly Feedback , Avg. Ratings 4.9
- 2. PRODUCT X MAS : 7,305 Yearly Feedback , Avg. Ratings 4.9
- 3. eFaucets : 7,127 Yearly Feedback , Avg. Ratings 4.4
- 4. Camplux : 2,742 Yearly Feedback , Avg. Ratings 4.7
- 5. Westcoastsales : 2,312 Yearly Feedback , Avg. Ratings 4.6
- 6. Voomi Supply : 2,310 Yearly Feedback , Avg. Ratings 4.1
- 7. Plumber's Paradise : 2,222 Yearly Feedback , Avg. Ratings 4.8
- 8. The Portland Group : 973 Yearly Feedback , Avg. Ratings 4.9
- 9. MTL Retailers : 499 Yearly Feedback , Avg. Ratings 4.1
- 10. Standard Plumbing Supply : 417 Yearly Feedback , Avg. Ratings 3.6
| Rank | Name | Yearly Feedbacks | Avg. Ratings |
|---|---|---|---|
| 🥇 | Direct Supply Store | 12,760 | 4.9 |
| 🥈 | PRODUCT X MAS | 7,305 | 4.9 |
| 🥉 | eFaucets | 7,127 | 4.4 |
| 4 | Camplux | 2,742 | 4.7 |
| 5 | Westcoastsales | 2,312 | 4.6 |
| 6 | Voomi Supply | 2,310 | 4.1 |
| 7 | Plumber's Paradise | 2,222 | 4.8 |
| 8 | The Portland Group | 973 | 4.9 |
| 9 | MTL Retailers | 499 | 4.1 |
| 10 | Standard Plumbing Supply | 417 | 3.6 |
[Get] 9 GPM Tankless Water Heaters Deals (✅Exclusively for Prime)
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"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.
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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 9 GPM Tankless Water Heaters to buy for new October 2026?
CherryPicks’s Methodology for Evaluating 9 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 9 GPM Tankless Water Heaters reviews based on our selection criteria. It helped us shortlist the top qualified and rated 9 GPM Tankless Water Heaters for Rough Plumbing, We found that most customers choose 9 GPM Tankless Water Heaters with an average price of $471.40, and the top brands are Westinghouse, CAMPLUX ENJOY OUTDOOR LIFE, Rheem, thermomate And Rinnai.
Then our expert-level editors reviewed all those quality items and selected the top 28 9 GPM Tankless Water Heaters for you, We have researched hundreds of sellers and picked the top sellers for Rough Plumbing, including Amazon Resale, Direct Supply Store, PRODUCT X MAS, eFaucets, Camplux, Westcoastsales, Voomi Supply, Plumber's Paradise, The Portland Group, MTL Retailers, Standard Plumbing Supply And Mizudo Home Comfort Direct. The Rheem Natural Gas Condensing Tankless Water Hea... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 30 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 9 GPM Tankless Water Heaters to buy.
Wade is a student with an interest in writing and loves to write about home and kitchen appliances. When he is not writing about this, he is coding. He also has an interest in computer programming more specifically blockchain development. He is introverted and likes to keep to himself depending on his mood.