Top 28 9 GPM Tankless Water Heaters on Amazon (Verified You can Buy)
Top 1
Best Water Heaters
Best for Gas Powered
Best for 30 Gallon
Best Tankless Water Heaters
Best for Rinnai
Best for 4 GPM
Best for 5 GPM
Best for 7 GPM
Best for 8 GPM
Best for 10 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 2
Best Water Heaters & Parts
Best for Rheem
Best for Tanked
Best for Electric
Best for Timer
Best for Whole House
Best for Rheem
Best for 20 Gallon
Best for 50 Gallon
Best for Takagi
Best for Noritz
Best for Rheem
Best for Stiebel Eltron
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 3 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
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 | - | ❌ | ❌ | ❌ |
Features
External digital thermostatic control with LED display (+/1 degree accuracy)
Most advanced self-modulation, adjust power to meet hot water demand
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 for CAMPLUX
Best for LP
Best for Indoor
Best for Wall
Best for GASLAND
Best for Eccotemp
Best for CAMPLUX
Best for 3 GPM
CAMPLUX Climatech 3 Tankless Water Heater Propane, 65,000 BTU Propane On Demand Hot Water Heater, Max 2.64 GPM, Indoor Installation, CX264, White
CAMPLUX ENJOY OUTDOOR LIFE
CX264WLP
5.9 x 5.9 x 21.3 Inches
19.1 Pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Camplux | - | ❌ | ❌ | ❌ |
Features
【2.64 GPM Propane Water Heater】CAMPLUX propane tankless water heater delivers endless hot water on demand for 1-2 water points, which is perfect for small living spaces such as tiny houses, mobile homes, and apartments
【Compact Design】CX264 gas tankless water heater save over 200% of available space compared to tank water heaters
Rinnai RU160iN Condensing Tankless Hot Water Heater, 9 GPM, Natural Gas, Indoor Installation
Rinnai
RU160in
18.5 x 11.45 x 31.3 inches
72.5 Pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Plumbing & HVAC Wholesale | - | ✅ | ✅ | ✅ |
| Amazon.com | - | ✅ | ✅ | ✅ |
| eFaucets | 9,712 | ❌ | ❌ | ❌ |
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 6
Best for Rinnai
Best for Rinnai
Best for Tankless
Best Tankless Water Heaters
Best for Rinnai
Best for 10 GPM
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 | 9,712 | ❌ | ❌ | ❌ |
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 7
Best for Whole House
Best for Residential
Best for 30 Gallon
Best for Noritz
Best for 7 GPM
Best for 8 GPM
Best for 10 GPM
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-27
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.
Top 8
Best for Inline
Best for Tanked
Best for Whole House
Best for 20 Gallon
Best for Takagi
Best for Noritz
Best for Rinnai
Best for FOGATTI
Best for Eccotemp
Best for AO Smith
Best for 2 GPM
Best for 4 GPM
Best for 7 GPM
Best for 8 GPM
Best for 10 GPM
Best for 11 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 | - | ❌ | ❌ | ❌ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| Sunny ING | - | ❌ | ❌ | ❌ |
| Nantek | - | ❌ | ❌ | ❌ |
Features
ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
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 10
Best for Whole House
Best for Takagi
Best for Noritz
Best for Rheem
Best for Stiebel Eltron
Best for EcoSmart
Best for FOGATTI
Best for AO Smith
Best for 2 GPM
Best for 3 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
Electric Tankless Water Heater WINTEMP 27kW 240V, Whole House Hot Water Supply, On Demand Instant Endless Water Heater, with LED Temperature Display, WiFi Control, Up to 6.3 GPM, ETL Certified
WINTEMP
WN27
11.0 x 11.0 x 19.1 inches
12.7 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, 200 Amp Household Service Recommended. The WN27 model is rated at 27KW (240V) with a maximum amperage of 113A. It requires 3 x 40 Amp double-pole (DP) breakers and 3 x 8/2 AWG wiring with ground, with a recommended 250A household power supply. 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 6.5 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 11
Best for Rinnai
Best for Outdoor
Best for Propane
Best for Rinnai
Best for Noritz
Best for Rinnai
Best for 5 GPM
Best for 10 GPM
Rinnai V53DeP Tankless Hot Water Heater, 5.3 GPM, Propane, Outdoor Installation
Rinnai
V53DeP
13.0 x 13.0 x 30.0 inches
33.0 pounds
High
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,712 | ✅ | ✅ | ✅ |
| Amazon.com | - | ✅ | ✅ | ✅ |
| Big Frog Supply | - | ✅ | ✅ | ✅ |
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 12
Best for EcoSmart
Best for Takagi
Best for EcoSmart
Best for FOGATTI
Best for AO Smith
Best for 2 GPM
Best for 7 GPM
Best for 8 GPM
Best for 10 GPM
Best for 11 GPM
Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, 17 x 17 x 3.5
EcoSmart
ECO24
17.0 x 17.0 x 17.0 Inches
14.25 pounds
Ratings for EcoSmart (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Sleek and compact design with digital output temperature display
ECOSMART tankless water heaters are 99.8-percent energy efficient
Top 13
Best for CAMPLUX
Best for Inline
Best for Gas Powered
Best for Battery
Best for Propane Liquid
Best for Outdoor
Best for Propane
Best Gas Water Heaters
Best for 80 Gallon
Best Tankless Water Heaters
Best for FOGATTI
Best for Eccotemp
Best for CAMPLUX
Best for 5 GPM
Best for 7 GPM
Best for 10 GPM
Best for 11 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 14
Best for Inline
Best for Electric
Best for NG
Best for Thermostat
Best for Residential
Best for Rheem
Best for Rheem
Best for AO Smith
Best for 5 GPM
Best for 7 GPM
Best for 10 GPM
Best for 11 GPM
Rheem 6.5kW 240V Point of Use Thermostatic Tankless Electric Water Heater
Rheem
RTEX-06T
10.875 x 10.875 x 5.875 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 | - | ❌ | ❌ | ❌ |
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 15
Best for Rheem
Best for Propane Liquid
Best for High Efficiency
Best for Rheem
Best for Rheem
Rheem RTG-95DVLP-3 High Efficiency Non-Condensing Indoor Tankless Liquid Propane Water Heater 9.5 GPM, 199,900 BTUs
Rheem
RTG Series Liquid Propane RTG-3
10.27 x 13.5 x 24.2 inches
46.5 Pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
High-efficiency tankless gas water heater delivers up to 9.5 GPM, perfect for 2–3 bathroom homes with multiple hot water needs like showers and laundry.
Powered by liquid propane with 199,900 BTUs, this durable tankless unit ensures fast, reliable hot water—even during peak household demand.
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
Propane Gas Tankless Water Heater, Indoor Max 4.3 GPM, 100,000 BTU On Demand Instant Hot Water Heater Propane Gas with LED Temperature Control Panel, 1/2" NPT Connector Size, Gray
LiberLive
HKRV-HR2110
14.2 x 14.2 x 22.1 Inches
Ratings for LiberLive (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Woot | 118 | ❌ | ❌ | ❌ |
Features
Powerful On-Demand Heating – This tankless water heater gas delivers 100,000 BTU & 4.3 GPM, supporting 3–4 water points simultaneously (shower + kitchen sink + bar sink + more). Enjoy endless tankless hot water heater performance with no waiting – perfect for daily household use
Precision Temperature Stability – Unlike conventional gas water heater units, our propane water heater eliminates sudden hot/cold spikes. Adjustable range (95°F–149°F) ensures consistent warmth, safe for infants, kids, and elders – no more unexpected cold blasts
Top 18
Best for Whole House
Best for 3 GPM
Best for 4 GPM
Best for 8 GPM
Best for 10 GPM
Best for 11 GPM
Best for 15 GPM
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 19
Best for Gas Powered
Best for Battery
Best for Outdoor
Best for Propane
Best for 30 Gallon
Best for 75 Gallon
Best for 80 Gallon
Best for 100 Gallon
Best for 5 GPM
Best for 11 GPM
Propane Water Heater 4.76 GPM 18L Outdoor Portable Tankless Water Heater 82000 BTU/Hour with Digital Display Battery Ignition 5 Mode Shower Head Instant On Demand Hot Water for RV Camping Cabin
VELPAX
RSQM20M21-US
6.3 x 6.3 x 23.2 inches
Ratings for VELPAX (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| DIVACEN | - | ❌ | ❌ | ❌ |
Features
【High Heating Performance】: This propane tankless water heater provides 24KW high heating power (82000 BTU/hr), with a maximum hot water output of 18L/4.76 GPM. On-demand instant hot water without a storage tank. The highly integrated burner and low-stage combustion design deliver higher efficiency and energy saving. Compact, lightweight, and ideal for year-round camping showers, RV travel, and outdoor use.
【Multiple Safety Protection】: Built-in 20-minute overtime protection and overheat protection for safe operation. Advanced combustion technology reduces gas consumption and burning noise. Inlet gas pressure: 2.8KPa; working water pressure: 0.015~0.8MPa (2.2~116 PSI), stable and reliable for outdoor use.
Top 20
Best for Rinnai
Best for Indoor
Best for Propane
Best for High Efficiency
Best Gas Water Heaters
Best for Rinnai
Best for Tankless
Best for Noritz
Best for Rinnai
Best for 11 GPM
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU
Rinnai
RX199iN
30.11 x 18.5 x 30.11 Inches
55.0 Pounds
High (UEF .98)
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,712 | ❌ | ❌ | ❌ |
| EXPRESS DISTRIBUTION | - | ❌ | ❌ | ❌ |
| Voomi 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 11.1 GPM (7 fixtures at once)
Top 21
Best for 8 GPM
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
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 | 9,712 | ❌ | ❌ | ❌ |
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)
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 24
Best for CAMPLUX
Best for Battery
Best for Outdoor
Best for CAMPLUX
Best for 2 GPM
Best for 7 GPM
Camplux 2.64 GPM Tankless , Outdoor Portable Gas Water Heater with Overheating Protection, Instant Propane Hot Water Heater for RV, Camping, Cabins, Barns, White
CAMPLUX ENJOY OUTDOOR LIFE
BD264N
13.0 x 13.0 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
𝐂𝐨𝐦𝐩𝐚𝐜𝐭, 𝐋𝐢𝐠𝐡𝐭 𝐖𝐞𝐢𝐠𝐡𝐭 𝐏𝐨𝐫𝐭𝐚𝐛𝐥𝐞 𝐃𝐞𝐬𝐢𝐠𝐧 - 12.8 (L)*6.1(W)*21.65(H) inches, weight-18 lbs. Compact and portable design perfect for barns, cabins, outdoor instant hot shower and road trips
𝐄𝐚𝐬𝐲 𝐈𝐧𝐬𝐭𝐚𝐥𝐥𝐚𝐭𝐢𝐨𝐧 & 𝐔𝐬𝐞 - Simply connect the inlet and outlet pipes and gas regulator that come with this portable water heater, insert 2 D-cell batteries, then you are ready to use. Low water pressure start of 3.6 PSI allows you to enjoy 2.64 gallons of water in just a few minutes
MicroHeat 6-10 Hydronic Heater 240-Volt 10-kW-kW 5-GPM Point Of Use Smart Tankless Electric Water Heater
Generic
CFEWHS6HYDR-10/PWU
8.69 x 8.69 x 11.62 inches
9.0 pounds
Ratings for Generic (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| FabFindz4U | - | ❌ | ❌ | ❌ |
Features
Color/Finish Family White Use Location Indoor Series Name MicroHeat 6-10 Hydronic Heater Display Type Digital Type Tankless Installation Type Wall mount Power Source Electric Vent Type None required Grade Commercial/Residential
Water Connection Size 3/4-in Family Size 1 Weight (lbs.) 9.6
Top 26
Best Water Heaters
Best for CAMPLUX
Best for Inline
Best for Outdoor
Best for Propane
Best Tankless Water Heaters
Best for CAMPLUX
Best for 5 GPM
Best for 10 GPM
Best for 11 GPM
Best for 15 GPM
Camplux 1.32 GPM Portable Water Heater Tankless Water Heater Propane Outdoor Black
CAMPLUX ENJOY OUTDOOR LIFE
AY132BN
11.42 x 4.33 x 14.8 inches
10.0 pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| CampluxDirect | - | ✅ | ✅ | ✅ |
| Camplux | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Portable, Lightweight Design: This portable water heater weights only 10 pounds and comes with folding handle keeps it out of the way and enables easy setup outside
Simple, Easy Hot Showers: The camplux portable hot water heater is easy to set-up. All you need is the water heater, gas bottle away you go! Adjust your temp is as just as easy. Find your perfect flow with the easy to use temperature dials.Setting up this propane water heater simply takes 10 minutes
Top 27
Best for Compact
Best for Under Sink
Best for 20 Gallon
Best for 30 Gallon
Best for 40 Gallon
Best for 100 Gallon
Best for Takagi
Best for FOGATTI
Best for AO Smith
LFEVTZ 110V Electric Tankless Water Heater 3000W, Instant Under Sink Hot Water Heater with Digital Display, Portable Mini Water Heater for Kitchen, Bathroom, RV
LFEVTZ
LZ-RESHUIQI-1
4.5 x 4.5 x 8.5 Inches
Ratings for LFEVTZ (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| KuangShengkejiyouxiangongsi | - | ❌ | ❌ | ❌ |
Features
【Instant Hot Water, No Waiting】With the LFEVTZ 110V mini tankless water heater, enjoy hot water in seconds—no preheating required. Advanced heating technology delivers temperatures from 82°F (0.3 GPM) to 131°F (0.5 GPM), eliminating wait time at your sink.
【Compact & Space-Saving Design】Designed for small spaces like kitchens, RVs, and camping setups, this compact unit mounts on the wall to save space. Water temperature adjusts based on flow rate—lower flow = higher temperature, giving you flexible control for daily tasks like washing dishes, food, hands, and more.
Westinghouse Tankless Water Heater Gas, 5.1 GPM 120,000 BTU Indoor Natural Gas Heater Whole House, Smart WiFi&App Control, CSA Certified, ±1°F Temperature Stability, Non-Condensing for 2-4 Fixtures
Westinghouse
AMZ-HW120A1G-NG
12.5 x 12.5 x 23.9 Inches
Ratings for Westinghouse (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Westinghouse Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
【Endless Hot Water for Everyday Home Use】Designed for indoor whole-home performance, this natural gas tankless water heater delivers up to 5.1 GPM and 120,000 BTU of on-demand hot water for showers, sinks, dishwashers, and laundry appliances. Comfortably supports 2–4 fixtures simultaneously without running out of hot water.
【Smart WiFi App Control】This gas tankless water heater allows you to adjust water temperature and monitor system operation via smartphone app or LED panel. It clearly shows daily water usage reports for at-a-glance consumption tracking, with real-time temperature visibility and simplified operation to deliver a smarter, more convenient hot water experience.
Top 10 9 GPM Tankless Water Heaters - Verified to Buy (September 2026)
- 1. Ranein Propane Gas Tankless Water Heater, Indoor Max 8.5 GPM,...
- 2. Rheem 18kW 240V Tankless Electric Water Heater
- 3. Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt...
- 4. CAMPLUX Climatech 3 Tankless Water Heater Propane, 65,000 BTU Propane...
- 5. Rinnai RU160iN Condensing Tankless Hot Water Heater, 9 GPM, Natural...
- 6. NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane...
- 7. 27kW Tankless Water Heater Electric, NOVIEEX 240V 3s Instant Hot...
- 8. Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
- 9. Rheem Natural Gas Condensing Tankless Water Heater Indoor Up To...
- 10. Electric Tankless Water Heater WINTEMP 27kW 240V, Whole House Hot...
Top 10 9 GPM Tankless Water Heaters Brands on Amazon
Here is the list of top-rated brands that were evaluated by CherryPicks.
- Ranein
- Rheem
- CAMPLUX ENJOY OUTDOOR LIFE
- Rinnai
- NOVIEEX
- WINTEMP
- EcoSmart
- LiberLive
- VELPAX
- Westinghouse
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. Woot : 264,925 Yearly Feedback , Avg. Ratings 4.8
- 2. eFaucets : 7,050 Yearly Feedback , Avg. Ratings 4.4
- 3. Big Frog Supply : 6,493 Yearly Feedback , Avg. Ratings 4.5
- 4. Camplux : 2,734 Yearly Feedback , Avg. Ratings 4.7
- 5. Westcoastsales : 2,310 Yearly Feedback , Avg. Ratings 4.6
- 6. Voomi Supply : 2,260 Yearly Feedback , Avg. Ratings 4.1
- 7. Amazon.com : 386 Yearly Feedback , Avg. Ratings 4.7
- 8. Plumbing & HVAC Wholesale : 324 Yearly Feedback , Avg. Ratings 4.3
- 9. Westinghouse Home Comfort Direct : 265 Yearly Feedback , Avg. Ratings 4.8
- 10. Columbiatradestock (S/N Info Recorded) : 161 Yearly Feedback , Avg. Ratings 4.6
| Rank | Name | Yearly Feedbacks | Avg. Ratings |
|---|---|---|---|
| 🥇 | Woot | 264,925 | 4.8 |
| 🥈 | eFaucets | 7,050 | 4.4 |
| 🥉 | Big Frog Supply | 6,493 | 4.5 |
| 4 | Camplux | 2,734 | 4.7 |
| 5 | Westcoastsales | 2,310 | 4.6 |
| 6 | Voomi Supply | 2,260 | 4.1 |
| 7 | Amazon.com | 386 | 4.7 |
| 8 | Plumbing & HVAC Wholesale | 324 | 4.3 |
| 9 | Westinghouse Home Comfort Direct | 265 | 4.8 |
| 10 | Columbiatradestock (S/N Info Recorded) | 161 | 4.6 |
[Get] 9 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 9 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 9 GPM Tankless Water Heaters to buy for new September 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 $564.14, and the top brands are Generic, Westinghouse, EcoSmart, CAMPLUX ENJOY OUTDOOR LIFE, Rheem 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, Woot, eFaucets, Big Frog Supply, Camplux, Westcoastsales, Voomi Supply, Amazon.com, Plumbing & HVAC Wholesale, Westinghouse Home Comfort Direct, Columbiatradestock (S/N Info Recorded) And CampluxDirect. The Ranein Propane Gas Tankless Water Heater, Indoo... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 441 consumers with an average rating of 4.1.
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.