Top 29 8 GPM Tankless Water Heaters on Amazon (Verified You can Buy)
Top 1
Best for Tanked
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.
Top 2
Best for 15 GPM
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
Top 3
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 9 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 4
Best for Whole House
Best for 3 GPM
Best for 4 GPM
Best for 9 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 5
FOGATTI Propane Gas Tankless Water Heater Outdoor - Max 8.1 GPM 180,000 BTU, CSA Certified Compact Design On Demand Instant Hot Water Heater - Instagas Comfort 180S Series
FOGATTI
InstaGas Comfort
26.2 x 17.1 x 7.3 inches
42.0 Pounds
Ratings for FOGATTI (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Westinghouse Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
Instant Hot Water: Say goodbye to preheating delays! FOGATTI tankless water heater delivers continuous hot water instantly, powered by 180,000 BTU and up to 8.1 GPM flow rate. Whether it’s for showers, sinks, or appliances, even for 3-5 outlet points, it ensures uninterrupted hot water
Built for Outdoor Durability: Designed specifically for outdoor installation, this tankless water heater propane features a remote control panel for convenient indoor operation. The bottom-mounted fan enhances safety, durability, and lifespan by preventing smoke backflow and ensuring stable combustion, making it reliable in all seasons
Tankless Water Heater Electric, ThermoMate 8kW at 240 Volt, On Demand Instant Hot Water Heater for Point of Use, Self-Modulating Save Energy, Save Space, 1.56GPM at 35°F Rise
thermomate
ET080
8.58 x 8.58 x 12.2 inches
9.9 pounds
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
[Instant Endless Hot Water] - Provide instant hot water wherever and whenever you need it. 24 hours standby. 8kW powerful heating support up to 2 faucets and large 1.56GPM at 35°F temperature rise. Max temperture up to 131°F. Requires Double Pole 40Amp breaker
[Leak Proof & Maintenance Free] - The first to use cast aluminum heating chamber, Heating element separated from water lines to prevent water leaking and scale & corrosion on heating element, ensuring high heating efficiency and extending usage life span
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 | - | ❌ | ❌ | ❌ |
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 8
Best Water Heaters
Best for Indoor
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 9 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.
APUS 190,000 BTU Outdoor Tankless Water Heater, 8.1 GPM Natural Gas Instant Hot Water Heater with WiFi & Remote Control, High Efficiency for Supports 5 Outlets
APUS
AP-AWH-W26NG
6.54 x 6.54 x 22.48 Inches
42.5 pounds
High
Ratings for APUS (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| APUS WATER EQUIPMENT | - | ❌ | ❌ | ❌ |
Features
Whole-Home Hot Water: This high-efficiency gas tankless water heater delivers 190,000 BTU and 8.1 gallons per minute of instant hot water, making it the perfect on demand water heater for whole-house use. Our advanced tankless water heater gas system effortlessly supplies 3 showers + 2 faucets simultaneously, while the ultra-low 0.79 GPM minimum flow ensures this hot water heater performs reliably even with weak water pressure
Smart Temperature Control: Remotely adjust your tankless hot water heater via App (Works with Tuya APP) or wired controller (95°F–149°F). Enjoy precise on-demand heating with a stable ±1°F temperature accuracy
Top 10
Best for GASLAND
GASLAND BS211 Outdoor Portable Propane Water Heater, 8L/2.11 GPM Instant Hot Water, Overheating Protection, Easy Install for RV Camping Cabin Boat, White
GASLAND
BS211
12.6 x 12.6 x 20.5 inches
High Efficiency
Ratings for GASLAND (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Gasland | - | ❌ | ❌ | ❌ |
Features
2.11GPM/8L Propane Water Heater - Maximum power output 55,000BTU/Hr. The temperature raise is 109.4℉ (43℃) at its highest point and 55.4℉ (13℃) is at its lowest point of 2.11 GPM. Also, 2.11 gallons of hot water can be produced per minute at the flow rate of 2.11 GPM. Low water pressure start up, just need 3.6 PSI of water pressure to start.
Good for Off-the-Grid- Runs on a standard 20 lb. liquid propane tank and is equipped with an electronic ignition powered by two D-cell batteries. Can be used in a variety of scenarios: while you're camping, RVing, hunting, hanging poolside, washing your pets or horses, cleaning your vehicle, or even in your tiny home, greenhouse, or cabin house.
Ecosmart US Performance 8 kW Self-Modulating 1.55 GPM Electric Tankless Water Heater
Ecosmart US
ECO 8
10.0 x 7.0 x 13.5 inches
7.0 pounds
Ratings for Ecosmart US (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| All Best Price in USA | - | ❌ | ❌ | ❌ |
| FJI INC | - | ❌ | ❌ | ❌ |
| Trena's Liquidation LLC | - | ❌ | ❌ | ❌ |
Features
Brand New in box. The product ships with all relevant accessories
Top 12
Best for 7 GPM
Mizudo 36kW Tankless Water Heater Electric, 240 Volt Instant Hot Water Heater, Up to 8.7 GPM for the Whole House Shower, 5-6 Points of Use, with LED Digital Display, Copper Cup Heating Element
MIZUDO
36kW
17.1 x 17.1 x 18.5 Inches
Ratings for MIZUDO (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Mizudo Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
Note: MIZUDO 36kw 240V tankless water heater electric requires 4 pcs of 40 AMP two-pole breakers, 4 sets of 8 AWG wires and 3/4" NPT water connections. With a compact size of 17.1"H x 18.5"L x 3.7"W, our electric hot water heater saves over 87% of space compared to traditional tank water heaters, fitting easily into most corners of your home.
High Energy Efficiency & Cost Saving: Boasting 98% high energy efficiency, this electric tankless water heater heats up in just 3 seconds. It delivers a flow rate of up to 8.7 PM, supplying on-demand hot water for 5-6 points of use simultaneously. Additionally, it can reduce electricity costs by up to 60% compared to traditional tank-style heaters.
Top 13
Best for 7 GPM
36kW Tankless Water Heater Electric, ThermoMate On Demand Instant Hot Water Heater 240 Volt, Max 8.0 GPM Self-Modulating for Whole House, ETL Certified for Residential Indoor Shower
thermomate
ET360
12.99 x 12.99 x 18.31 Inches
27.0 pounds
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
[Instant & Endless Hot Water for Large Homes] Experience continuous hot water on demand. This 36kW high-capacity heater delivers instant hot water in seconds, eliminating the wait and ensuring you never run out, even during peak usage with multiple showers and appliances running simultaneously. (Estimated Flow Rate: 7.03GPM at a 35°F rise)
[Powerful Whole-House Performance] Designed for large households with high hot water demands. Effortlessly supply 4 showers, kitchens, and laundry rooms concurrently. Ideal for larger families, ensuring consistent hot water pressure and temperature throughout your entire home
TOPWISH Portable Propane Water Heater Tankless, 8L 2.11GPM Instant Gas Hot Water Heater 54,500 BTU with Digital Display Handle Overheating Protection for Outdoor Camping RV Cabin Shower
TOPWISH
XBUS-AWH-001-W-8L-new
12.0 x 12.0 x 20.0 inches
8.5804 Pounds
Ratings for TOPWISH (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| XiBei Household | - | ❌ | ❌ | ❌ |
Features
【Designed to Meet Your Expectations】 Topwish propane water heater tankless is designed with your needs in mind. Weighing just 14 lbs and delivering a powerful 2.11 GPM water flow, Topwish portable water heater offers fast heating in just 5 seconds, making it ideal for camping, RVs, and outdoor adventures. Enjoy hassle-free hot water on the go!
【Core Performance Features】With 54,500 BTU heating power and a wide water pressure range of 20–120 PSI, Topwish propane water heater tankless ensures consistent performance and reliability. Whether you’re using Topwish portable water heater in a remote cabin, during outdoor activities, or in your RV, it’s built to deliver the hot water you need.
Top 15
Best for AO Smith
A. O. Smith Tankless Water Heater Gas - On Demand Hot Water - Indoor - 8 GPM - Non-Condensing Natural Gas with X3 Scale Prevention Technology - 190,000 BTU ProLine XE - ATI-310CX3
A. O. Smith
ATI-310CX3
13.75 x 13.75 x 20.5 inches
51.0 pounds
0.81 UEF
Ratings for A. O. Smith (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| A. O. Smith Water Treatment | - | ❌ | ❌ | ❌ |
Features
Enjoy Continuous Flow: This heater allows a flow rate up to 8.0 GPM while X3 Scale Prevention Technology prevents scale buildup and maintains like-new performance longer. No annual descaling or isolation valves required.
Lower Your Energy Cost: Using our high-efficiency tankless water heater with up to .81 Uniform Energy Factor (UEF). Includes integrated temperature controls and advanced diagnostics for easy operation.
Top 16
Best Water Heaters & Parts
Best for Rheem
Best for Inline
Best for Tanked
Best for Electric
Best for NG
Best for Digital
Best for Thermostat
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 9 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
Top 17
Best for Fogatti
Best for 40 Gallon
Best for 60 Gallon
Best for 75 Gallon
Best for 80 Gallon
Best for Tankless
Best for Takagi
Best for Rinnai
Best for FOGATTI
Best for 4 GPM
Best for 5 GPM
FOGATTI Natural Gas Tankless Water Heater Outdoor - Max 8.1 GPM 180,000 BTU, CSA Certified Compact Design On Demand Instant Hot Water Heater - Instagas Comfort 180S Series, New Upgraded
FOGATTI
FOG-PM18OS
17.1 x 17.1 x 26.2 inches
43.2 pounds
Ratings for FOGATTI (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Westinghouse Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
Instant Hot Water: Say goodbye to preheating delays! FOGATTI tankless water heater delivers continuous hot water instantly, powered by 180,000 BTU and up to 8.1 GPM flow rate. Whether it’s for showers, sinks, or appliances, even for 3-5 outlet points, it ensures uninterrupted hot water
Built for Outdoor Durability: Designed specifically for outdoor installation, this tankless water heater gas features a remote control panel for convenient indoor operation. The bottom-mounted fan enhances safety, durability, and lifespan by preventing smoke backflow and ensuring stable combustion, making it reliable in all seasons
Top 18
Best for Rheem
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 9 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
Top 19
Best for 9 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
Rheem RETEX-36 Performance 36 kw Self-Modulating 6 GPM Electric Tankless Water Heater
Rheem
RTEX-36
21.62 x 21.62 x 18.25 inches
19.0 Pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| C_S Enterprises | - | ✅ | ✅ | ✅ |
| Arsenal PC | 4,550 | ✅ | ✅ | ✅ |
| Lisa Liquidations llc | - | ✅ | ✅ | ✅ |
| AXY Co | - | ✅ | ✅ | ✅ |
| Trena's Liquidation LLC | - | ❌ | ❌ | ❌ |
| PEACHSTATESTEALSANDDEALS | - | ❌ | ❌ | ❌ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| EPINOLUX | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
| KOPKO | - | ❌ | ❌ | ❌ |
| Direct Supply Store | 5,208 | ❌ | ❌ | ❌ |
Features
This refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, and may arrive in a generic box
Top 21
Best for Whole House
Best for 30 Gallon
Best for Noritz
Best for 7 GPM
Best for 9 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.
FOGATTI Upgrade 18kW Tankless Water Heater Electric, 240V On Demand Instant Hot Water Heater, Up to 4.4 GPM for Whole House Showering, ETL Certified, with LED Display
FOGATTI
18kW
3.9 x 3.9 x 17.1 inches
Ratings for FOGATTI (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Westinghouse Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
NOTE：Be sure to understand the wire usage requirements first. Fogatti 18kW 240V tankless water heater electric requires 2 x 40 AMP Two-pole Circuit Breaker and 2-sets of 8 AWG wires. Water connection 3/4" NPT. Product size 17.1" x 12.9" x 3.9".
Instant & Unlimited Hot Water: Get hot water on demand, the second you need it. This electric tankless water heater delivers a high heating efficiency of up to 98%, providing immediate comfort and remarkable temperature stability. With a flow rate of 4.4 GPM, it's perfectly designed to power 2-3 points of use simultaneously anywhere in your home, ensuring everyone's comfort is met.
Top 23
Best Water Heaters
Best for Inline
Best for Electric
Best for NG
Best for High Efficiency
Best for 40 Gallon
Best Tankless Water Heaters
Best for EcoSmart
Best for 2 GPM
Best for 3 GPM
Best for 5 GPM
Best for 11 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
Top 24
Best for Takagi
Best for EcoSmart
Best for FOGATTI
Best for AO Smith
Best for 2 GPM
Best for 7 GPM
Best for 9 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 25
Propane Tankless Water Heater Outdoor, 8L Portable Propane Water Heater with Digital Display, Overheating Protection, 2.11 GPM Instant Hot Water Heaters for Camping Trips RV Outdoor Shower
SHENGJINSH
8L
12.6 x 12.6 x 20.5 inches
Ratings for SHENGJINSH (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| 锦昇-SHENGJINSH | - | ❌ | ❌ | ❌ |
Features
【Efficient & Energy Saving】High efficiency propane tankless water heater delivers 2.11 gallons of instant hot water per minute, no more waiting for long time. The maximum temperature raise is 167℉. The heat exchanger and main burner are designed with advanced combustion technology to decrease gas consumption and burning noise. Spend less money and get more hot water!
【Multiple Safety Protections】 Our tankless propane water heater is equipped with multiple automatic protection features, such as overheat protection, dry combustion protection, flame failure protection, anti-freezing protection, low water flow protection, high water pressure protection and 20-min off timer. Applicable only Propane（LPG).
Top 26
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 27
CAMPLUX Tankless Water Heater Electric, 8kW at 240 Volt, On Demand Instant Hot Water Heater for Point of Use, Self-Modulating Save Energy, Save Space, 1.56GPM at 35°F Rise
CAMPLUX ENJOY OUTDOOR LIFE
TEW08N
8.5 x 8.5 x 12.2 inches
8.8 pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Camplux | - | ❌ | ❌ | ❌ |
Features
Instant Hot Water System- Provide instant hot water with 24 hours standby, 8kW powerful heating supports up to 2 faucets and large 1.56GPM at 35°F temperature rise, maximum temperature up to 131°F
Energy Efficiency- Self-modulating flow sensor technology regulates energy consumption based on actual hot water demand
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 | - | ❌ | ❌ | ❌ |
Features
ON/OFF Dial Control with adjustable digital temperature display
Self-modulating power control
Top 29
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 10 8 GPM Tankless Water Heaters - Verified to Buy (September 2026)
- 1. Ranein 8kW Tankless Electric Water Heater, 240V on Demand Instant...
- 2. Tankless Water Heater Electric 8kW 240V, On Demand Instant Hot...
- 3. Electric Tankless Water Heater WINTEMP 27kW 240V, Whole House Hot...
- 4. WINTEMP 36kW Tankless Electric Water Heater 240V, Instant On-Demand Endless...
- 5. FOGATTI Propane Gas Tankless Water Heater Outdoor - Max 8.1...
- 6. Tankless Water Heater Electric, ThermoMate 8kW at 240 Volt, On...
- 7. Ranein Natural Gas Tankless Water Heater, Indoor Max 8.5 GPM,...
- 8. Ranein Propane Gas Tankless Water Heater, Indoor Max 8.5 GPM,...
- 9. APUS 190,000 BTU Outdoor Tankless Water Heater, 8.1 GPM Natural...
- 10. GASLAND BS211 Outdoor Portable Propane Water Heater, 8L/2.11 GPM Instant...
Top 10 8 GPM Tankless Water Heaters Brands on Amazon
Here is the list of top-rated brands that were evaluated by CherryPicks.
- Ranein
- WINTEMP
- FOGATTI
- thermomate
- APUS
- GASLAND
- Ecosmart US
- MIZUDO
- TOPWISH
- A. O. Smith
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. Arsenal PC : 14,346 Yearly Feedback , Avg. Ratings 4.7
- 2. A. O. Smith Water Treatment : 3,134 Yearly Feedback , Avg. Ratings 4.9
- 3. Camplux : 2,734 Yearly Feedback , Avg. Ratings 4.7
- 4. Gasland : 1,801 Yearly Feedback , Avg. Ratings 4.6
- 5. FJI INC : 567 Yearly Feedback , Avg. Ratings 4.4
- 6. MTL Retailers : 498 Yearly Feedback , Avg. Ratings 4.1
- 7. Mizudo Home Comfort Direct : 401 Yearly Feedback , Avg. Ratings 4.7
- 8. KOPKO : 400 Yearly Feedback , Avg. Ratings 4.8
- 9. Amazon.com : 386 Yearly Feedback , Avg. Ratings 4.7
- 10. ThermoMate Official : 371 Yearly Feedback , Avg. Ratings 4.7
| Rank | Name | Yearly Feedbacks | Avg. Ratings |
|---|---|---|---|
| 🥇 | Arsenal PC | 14,346 | 4.7 |
| 🥈 | A. O. Smith Water Treatment | 3,134 | 4.9 |
| 🥉 | Camplux | 2,734 | 4.7 |
| 4 | Gasland | 1,801 | 4.6 |
| 5 | FJI INC | 567 | 4.4 |
| 6 | MTL Retailers | 498 | 4.1 |
| 7 | Mizudo Home Comfort Direct | 401 | 4.7 |
| 8 | KOPKO | 400 | 4.8 |
| 9 | Amazon.com | 386 | 4.7 |
| 10 | ThermoMate Official | 371 | 4.7 |
[Get] 8 GPM Tankless Water Heaters Deals (✅Exclusively for Prime)
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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 September 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 $398.85, and the top brands are EcoSmart, CAMPLUX ENJOY OUTDOOR LIFE, GASLAND, Rheem, thermomate, FOGATTI And A. O. Smith.
Then our expert-level editors reviewed all those quality items and selected the top 29 8 GPM Tankless Water Heaters for you, We have researched hundreds of sellers and picked the top sellers for Rough Plumbing, including Amazon Resale, Arsenal PC, A. O. Smith Water Treatment, Camplux, Gasland, FJI INC, MTL Retailers, Mizudo Home Comfort Direct, KOPKO, Amazon.com, ThermoMate Official And Westinghouse Home Comfort Direct. The Ranein 8kW Tankless Electric Water Heater, 240V... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 356 consumers with an average rating of 4.0.
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.