Top 26 3 GPM Tankless Water Heaters on Amazon (Verified You can Buy)
Top 1
Rheem RTG-95DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater 9.5 GPM, 199,900 BTUs
Rheem
RTG Series Natural Gas 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 |
|---|---|---|---|---|
| Buildcom | 972 | ❌ | ❌ | ❌ |
| Voomi Supply | - | ❌ | ❌ | ❌ |
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 natural gas with 199,900 BTUs, this durable tankless unit ensures fast, reliable hot water—even during peak household demand.
Top 2
Best for Gas Powered
Natural Gas Tankless Water Heater, Indoor Max 4.3 GPM, 100,000 BTU On Demand Instant Hot Water Heater Natural Gas with LED Temperature Control Panel, 1/2" NPT Connector Size, Gray 4.3 N1
LiberLive
4.3 N1
14.2 x 14.2 x 22.1 inches
Ratings for LiberLive (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| LiberLive Store | - | ❌ | ❌ | ❌ |
Features
Powerful On-Demand Heating – This tankless water heater gas model 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 advanced temperature control 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
CAMPLUX Climatech 3 Tankless Water Heater Propane 102,000 BTU, 4.22 GPM Propane Tankless Water Heaters Indoor, High Efficiency On Demand Propane Water Heater for 3-4 Outlets, CX422
CAMPLUX ENJOY OUTDOOR LIFE
CX422W-LP
6.8 x 6.8 x 21.3 Inches
21.1 Pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Camplux | - | ❌ | ❌ | ❌ |
Features
Powerful & High-Capacity: This high-performance propane tankless water heater delivers 102,000 BTU heating capacity with 4.22GPM high flow rate. As a versatile tankless water heater, it meets simultaneous hot water demands for endless hot water on demand for 2-3 water points even during peak usage
Energy Efficiency & Saving Money: This propane hot water heater has sophisticated water flow sensors and a smart chip with 1,000s calculation, which ensures consistent hot waterwith variations of only ±1℉, making bathing enjoyable. Featuring high-quality oxygen-free copper heat exchangers and innovative segmented combustion technology,it delivers 30% greater energy savings than conventional tank water heater models
Top 4
Best for Inline
Best for Electric
Best for Digital
Best for Indoor
Best for Whole House
Best for 20 Gallon
Best for 100 Gallon
Best for Takagi
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
18kW Tankless Water Heater Electric, NOVIEEX 240V 3s Instant Hot Water Heater, Flow Rate Max 4.9 GPM, Supply for 2-3 Points, Indoor Installation, Ideal for Apartment, Garage, Salon, Bathroom, Kitchen
NOVIEEX
DS-18
11.14 x 11.14 x 15.86 inches
Ratings for NOVIEEX (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| NOVIEEX Global | - | ❌ | ❌ | ❌ |
| Woot | 118 | ❌ | ❌ | ❌ |
Features
【MEDIUM HOME SOLUTION】 The NOVIEEX 18kW electric tankless water heater is specifically engineered for small-to-medium-sized homes, condos, and apartments with 2-3 simultaneous water needs. Its sleek, ultra-thin wall-mount profile (11.14" x 15.86" x 3.18") frees up 80% more space compared to obsolete, bulky storage tanks, maximizing spatial efficiency in your basement, utility closet, or garage.
【HIGH CAPACITY FLOW】 It delivers a powerful water flow rate of up to 4.9 Gallons Per Minute (GPM). This high capacity easily accommodates multiple running fixtures at once, allowing family members to run a shower, wash dishes in the kitchen sink, and operate the laundry machine concurrently without any drop in temperature or water pressure.
Top 5
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 5 GPM
Best for 8 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 6
Best Water Heaters
Best for Inline
Best for NG
Best for Indoor
Best Gas Water Heaters
Best for 30 Gallon
Best for 40 Gallon
Best for 75 Gallon
Best for 80 Gallon
Best for Tankless
Best for 4 GPM
Best for 5 GPM
Westinghouse Smart Tankless Water Heater Gas Indoor, 7.9 GPM 180,000 BTU Whole Home Natural Gas Heater, WiFi App Control, ±1°F Temperature Stability, Non-Condensing for 3-5 Fixtures
Westinghouse
HW180A0G-NG
17.1 x 17.1 x 26.2 inches
Ratings for Westinghouse (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Westinghouse Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
【Endless Hot Water for the Whole Home】Enjoy continuous instant hot water for showers, laundry, dishwashing, and daily household use. Delivering up to 7.9 GPM and 180,000 BTU, this whole house tankless water heater comfortably supports 3–5 fixtures simultaneously without sacrificing comfort or water pressure.
【Smart WiFi App Control】Control your indoor tankless water heater anytime through the smartphone app or LED display panel. Easily adjust water temperature, monitor operating status, and enjoy a smarter, more convenient hot water experience for your home.
CAMPLUX Climatech 3 Tankless Water Heater Gas 4.22 GPM, 102,000 BTU Propane Tankless Water Heaters, High Efficiency Instant Hot Water with Multi-Points Use for Whole House, Indoor, CX422, White
CAMPLUX ENJOY OUTDOOR LIFE
CX422WLP
6.8 x 6.8 x 21.3 Inches
21.1 pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Camplux | - | ❌ | ❌ | ❌ |
| DC Home Supply | - | ❌ | ❌ | ❌ |
Features
【4.22 GPM Gas Water Heater】It is ideal for compact houses, mobile homes, and apartments. These gas tankless water heaters produce 4.22 GPM of endless hot water on demand for 2-3 water points
【Temperature Control】The CAMPLUX indoor tankless water heater has sophisticated water flow sensors and a smart chip with 1,000s calculation, which ensures consistent hot waterwith variations of only ±1℉, making bathing enjoyable
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 9
Best for Rheem
Best for High Efficiency
Best for Rheem
Best for 40 Gallon
Best for 50 Gallon
Best for Takagi
Best for Rheem
Best for AO Smith
Best for 7 GPM
Rheem RTG-70DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater 7.0 GPM, 160,000 BTUs
Rheem
RTG-70DVLN-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 7.0 GPM, perfect for 2–3 bathroom homes with multiple hot water needs like showers and laundry.
Powered by natural gas with 160,000 BTUs, this durable tankless unit ensures fast, reliable hot water—even during peak household demand.
Top 10
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 GASLAND
Best for 4 GPM
Tankless Water Heater, Novieex On Demand Water Heater Natural Gas, Up to 4.3 GPM, 100,000 BTU Instant Hot Water Heater with LED Display, Indoor Installation, 2-4 Point Use for Family Bathroom Kitchen
NOVIEEX
RS-16
28.54 x 17.32 x 10.83 inches
19.84 pounds
Ratings for NOVIEEX (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| NOVIEEX Global | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Woot | 118 | ❌ | ❌ | ❌ |
Features
【Note 】 This is 4.3GPM natural gas model. Gas rated pressure: 8.04" w.c. (2.0 kPa), Gas Inlet & Cold Water Inlet & Hot Water Outlet：NPT 1/2", Power Supply: 110V-120V AC/60Hz, Water Pressure Range: 1.5-116 psi (0.01-0.8MPa)
【Reliable Hot Water on Demand】 With 100,000 BTU power, this on demand water heater delivers up to 4.3 GPM instant hot water. You can comfortably run a shower, kitchen faucet, and bathroom sink simultaneously—all without any noticeable temperature drop.
Electrolux 14kW Tankless Water Heater Electric 240V - Smart WiFi & Alexa, On Demand Hot Water Heater Electric, Max 3.4 GPM, With Scale Inhibitor, Space-Saving Instant Hot Water Heater for Shower
Electrolux
14kW
8.9 x 8.9 x 12.8 inches
7.8 pounds
Ratings for Electrolux (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Electrolux Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
[3s Instant Hot Water, No Waiting] - This on demand hot water heater electric delivers endless hot water in just 3 seconds, perfect for showers, sinks, and more. As an efficient tankless water heater electric, This 14kw tankless water heater electric is designed for 1-2 fixtures with a maximum flow rate of 3.4 GPM, giving you a comfortable instant hot water experience every day.
[Smart WiFi & Alexa Voice Control] - As an advanced electric tankless water heater 240v, it comes with built‑in WiFi for remote temperature adjustment (80°F – 140°F) via a smartphone app, and is compatible with Alexa voice control. Whether you're across the room or in another part of the house, simply speak or tap to fine‑tune the temperature. This tankless electric water heater makes smart home water management easier than ever, and represents the innovation you expect from an Electrolux electric tankless water heater.
Top 12
Best for Rheem
Best for Propane Liquid
Best for Outdoor
Best for Propane
Best for High Efficiency
Best for Rheem
Best Gas Water Heaters
Best for 50 Gallon
Best for Tankless
Best for 50 Gallon
Best Tankless Water Heaters
Best for Takagi
Best for Rheem
Best for Rinnai
Best for 7 GPM
Rheem RTG-70XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater 7.0 GPM, 160,000 BTUs
Rheem
RTG-70XLP-3
9.4 x 13.5 x 20.75 inches
39.25 Pounds
high
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
High-efficiency tankless gas water heater delivers up to 7.0 GPM, perfect for 2–3 bathroom homes with multiple hot water needs like showers and laundry.
Powered by liquid propane with 160,000 BTUs, this durable tankless unit ensures fast, reliable hot water—even during peak household demand.
Top 13
Best for Rheem
Best for High Efficiency
Best for Rheem
Best for 50 Gallon
Best for 50 Gallon
Best for Rheem
Rheem RTG-95DVELN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater 9.5 GPM with WiFi, 199,900 BTUs
Rheem
RTG-95DVELN-3
10.27 x 13.5 x 24.2 inches
46.54 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 natural gas with 199,900 BTUs, this durable tankless unit ensures fast, reliable hot water—even during peak household demand.
Top 14
Best for CAMPLUX
Best for LP
Best for Indoor
Best for Wall
Best for GASLAND
Best for Eccotemp
Best for CAMPLUX
Best for 9 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
CAMPLUX Climatech 3 Tankless Water Heater Propane 3.6 GPM, 82,000 BTU High Efficiency Instant On-Demand Hot Water, 2-3 Points Gas Tankless Water Heater Indoor, White, CX360
CAMPLUX ENJOY OUTDOOR LIFE
CX360WLP
6.8 x 6.8 x 21.3 Inches
20.5 pounds
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
3.6 GPM & 82,000 BTU: CX360 propane tankless water heater delivers consistent hot water to 2-3 fixtures simultaneously, you can get unlimited hot water on demand. No need to wait, no cold water shocks
Easy Installation: CX360 propane gas water heater tankless features standard 3/4" NPT water inlet/outlet connectors, a 1/2" NPT gas inlet, a 3" OD vent, and a UL-approved 120V plug, ensuring compatibility with most households. Matches with CAMPLUX vent kit VP70T and valve kit VK75.
Top 16
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 4 GPM
Best for 5 GPM
Best for 7 GPM
Best for 8 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
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
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.
Stiebel Eltron 220816 Model Mini 3-1 Mini Single Handwashing Sink Tankless Electric Water Heater, 120 Volts, 3.0kW, 25A, Mechanical 0.40 GPM 1.5 l/min Flow Rate, 0.026 gal / 0.1 L Water Volume
Stiebel Eltron
Mini 3-1
7.5 x 7.5 x 6.5 inches
4.0 pounds
Ratings for Stiebel Eltron (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| A E T C | - | ✅ | ✅ | ✅ |
| westlake | 1,894 | ✅ | ✅ | ✅ |
| Hearthshire | 77 | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Extremely compact design saves space
Unlimited supply of hot water
APUS Tankless Water Heater Natural Gas, Up to 3.6 GPM, Indoor Tankless Water Heater, 80,000 BTU on Demand Instant Hot Water Heaters with Smart Digital Display,Space Gray
APUS
AP-AWH-Q10NG
19.29 x 19.29 x 27.59 Inches
Ratings for APUS (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| APUS WATER EQUIPMENT | - | ❌ | ❌ | ❌ |
Features
Powerful & High-Capacity: This high-performance gas tankless water heater delivers 80,000 BTU heating capacity with 3.6 GPM high flow rate, featuring innovative 0.53 GPM low-flow start technology. As a versatile natural gas tankless water heater, it meets simultaneous hot water demands for 2 showers plus 1 sink while maintaining stable temperatures even during peak usage.
Precise & Steady: With high-precision sensors and smart CPU technology, this tankless gas water heater maintains water temperature within ±1°F of your desired setting (adjustable from 95°F-140°F). No more sudden hot/cold shocks—just perfectly steady water for showers, washing, and more, even with multiple faucets running. Enjoy worry-free comfort every time!
Top 20
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 4 GPM
Best for 5 GPM
Best for 7 GPM
Best for 8 GPM
Best for 9 GPM
Best for 10 GPM
Best for 11 GPM
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 21
Best for Rheem
Best for Rheem
Best for 50 Gallon
Best for 60 Gallon
Best for 50 Gallon
Best for Noritz
Best for Rheem
Best for 7 GPM
Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 7.0 GPM, Gray
Rheem
RTG-70XLN-3
9.4 x 13.5 x 20.75 Inches
39.25 Pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
High-efficiency tankless gas water heater delivers up to 7.0 GPM, perfect for 2–3 bathroom homes with multiple hot water needs like showers and laundry.
Powered by natural gas with 160,000 BTUs, this durable tankless unit ensures fast, reliable hot water—even during peak household demand.
Top 22
Best for GASLAND
Best for LP
Best for 40 Gallon
Best for 60 Gallon
Best for GASLAND
Best for 5 GPM
GASLAND Gasmart C Propane Gas Tankless Water Heater Indoor, Max 5 GPM 113,000 BTU,CSA Certified,On Demand Hot Water Heater with 3" Exhaust Pipe, 120 Volt, Black
GASLAND
CS422BLP
12.6 x 12.6 x 19.88 inches
Ratings for GASLAND (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Gasland | - | ❌ | ❌ | ❌ |
Features
Powerful 5.0 GPM Whole Home Hot water: Engineered with a robust 113,000 BTU output, the CS422BLP delivers a high flow rate of up to 5 Gallons Per Minute (GPM). This high-capacity propane tankless water heater effortlessly supplies endless hot water for 3–5 water outlets throughout the house, ensuring a comfortable hot water experience for the whole family.
Multiple Safety Features - Comes with a long list of safety features standard. These include: built in freeze protection, an overheat cutoff fuse, inlet and outlet thermistors to monitor temperatures, and a built-in flame sensor. When the water temperature is fall below 41°F, it will starting heating to avoid freeze damag, but the power must be kept on.Certified by CSA and equipped with multiple safety features, it meets the highest safety standards for reliable operation.
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 24
Best for Inline
Best for Whole House
Best for 30 Gallon
Best for Noritz
Best for 2 GPM
Best for 4 GPM
Best for 5 GPM
Best for 7 GPM
Best for 15 GPM
27kW Tankless Water Heater Electric, APUS 240V On Demand Instant Hot Water with Memory Function & LED Display, Energy-Saving Whole Home Water Heating System, Up to 6.5 GPM and Space Saving Design,Gray
APUS
AP- ADSK-270G13
11.42 x 11.42 x 17.72 Inches
18.96 pounds
99%
Ratings for APUS (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| APUS WATER EQUIPMENT | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Endless Instant Hot Water On Demand: Experience continuous electric tankless water heater performance with our powerful 27kW tankless water heater, delivering on-demand hot water at up to 6.5 GPM—ideal for 3-4 simultaneous uses (showers, sinks, appliances). The advanced cast aluminum heating element ensures rapid, efficient heating in this tankless hot water heater electric, with no preheating, no waiting, and no cold interruptions.
Smart Control with Memory Function: Precisely set your temperature (86°F-140°F) via the LED display on this electric tankless water heater 240V, with 1°F adjustments for ultimate comfort. The memory function saves settings after power cycles, while self-modulating tech adjusts energy use for efficiency—perfect for smart tankless water heater operation.
Top 25
Best for Whole House
Best for 4 GPM
Best for 8 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 26
Best for Rheem
Best for Propane Liquid
Best for Indoor
Best for Rheem
Best for 50 Gallon
Best for 75 Gallon
Best for Takagi
Best for Rheem
Best for Rinnai
Best for AO Smith
Best for 7 GPM
Rheem RTG-70DVLP-3 High Efficiency Non-Condensing Indoor Tankless Liquid Propane Water Heater 7.0 GPM, 160,000 BTUs
Rheem
RTG-70DVLP-3
10.27 x 13.5 x 24.2 inches
46.5 pounds
0.82
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
| HTRM INC. | - | ❌ | ❌ | ❌ |
Features
High-efficiency tankless gas water heater delivers up to 7.0 GPM, perfect for 2–3 bathroom homes with multiple hot water needs like showers and laundry.
Powered by liquid propane with 160,000 BTUs, this durable tankless unit ensures fast, reliable hot water—even during peak household demand.
Top 10 3 GPM Tankless Water Heaters - Verified to Buy (September 2026)
- 1. Rheem RTG-95DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water...
- 2. Natural Gas Tankless Water Heater, Indoor Max 4.3 GPM, 100,000...
- 3. CAMPLUX Climatech 3 Tankless Water Heater Propane 102,000 BTU, 4.22...
- 4. 18kW Tankless Water Heater Electric, NOVIEEX 240V 3s Instant Hot...
- 5. 14kW Tankless Water Heater Electric, ORBEK On Demand Instant Hot...
- 6. Westinghouse Smart Tankless Water Heater Gas Indoor, 7.9 GPM 180,000...
- 7. CAMPLUX Climatech 3 Tankless Water Heater Gas 4.22 GPM, 102,000...
- 8. Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt...
- 9. Rheem RTG-70DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water...
- 10. Tankless Water Heater, Novieex On Demand Water Heater Natural Gas,...
Top 10 3 GPM Tankless Water Heaters Brands on Amazon
Here is the list of top-rated brands that were evaluated by CherryPicks.
- Rheem
- LiberLive
- CAMPLUX ENJOY OUTDOOR LIFE
- NOVIEEX
- Orbek
- Westinghouse
- Electrolux
- Stiebel Eltron
- APUS
- WINTEMP
Related 3 GPM Tankless Water Heaters Guides
For more personalized 3 GPM Tankless Water Heaters guides, Check those pages,
GPM
Top 10 3 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. Hearthshire : 349,293 Yearly Feedback , Avg. Ratings 4.7
- 2. Woot : 264,925 Yearly Feedback , Avg. Ratings 4.8
- 3. Buildcom : 51,606 Yearly Feedback , Avg. Ratings 4.5
- 4. westlake : 30,385 Yearly Feedback , Avg. Ratings 4.8
- 5. Camplux : 2,734 Yearly Feedback , Avg. Ratings 4.7
- 6. Voomi Supply : 2,260 Yearly Feedback , Avg. Ratings 4.1
- 7. Gasland : 1,801 Yearly Feedback , Avg. Ratings 4.6
- 8. DC Home Supply : 1,575 Yearly Feedback , Avg. Ratings 4.5
- 9. Amazon.com : 386 Yearly Feedback , Avg. Ratings 4.7
- 10. Westinghouse Home Comfort Direct : 265 Yearly Feedback , Avg. Ratings 4.8
| Rank | Name | Yearly Feedbacks | Avg. Ratings |
|---|---|---|---|
| 🥇 | Hearthshire | 349,293 | 4.7 |
| 🥈 | Woot | 264,925 | 4.8 |
| 🥉 | Buildcom | 51,606 | 4.5 |
| 4 | westlake | 30,385 | 4.8 |
| 5 | Camplux | 2,734 | 4.7 |
| 6 | Voomi Supply | 2,260 | 4.1 |
| 7 | Gasland | 1,801 | 4.6 |
| 8 | DC Home Supply | 1,575 | 4.5 |
| 9 | Amazon.com | 386 | 4.7 |
| 10 | Westinghouse Home Comfort Direct | 265 | 4.8 |
[Get] 3 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 3 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 3 GPM Tankless Water Heaters to buy for new September 2026?
CherryPicks’s Methodology for Evaluating 3 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 3 GPM Tankless Water Heaters reviews based on our selection criteria. It helped us shortlist the top qualified and rated 3 GPM Tankless Water Heaters for Rough Plumbing, We found that most customers choose 3 GPM Tankless Water Heaters with an average price of $477.48, and the top brands are Westinghouse, Electrolux, CAMPLUX ENJOY OUTDOOR LIFE, GASLAND, Rheem And Stiebel Eltron.
Then our expert-level editors reviewed all those quality items and selected the top 26 3 GPM Tankless Water Heaters for you, We have researched hundreds of sellers and picked the top sellers for Rough Plumbing, including Amazon Resale, Hearthshire, Woot, Buildcom, westlake, Camplux, Voomi Supply, Gasland, DC Home Supply, Amazon.com, Westinghouse Home Comfort Direct And HTRM INC.. The Rheem RTG-95DVLN-3 High Efficiency Non-Condensi... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 88 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 3 GPM Tankless Water Heaters to buy.
Born to be a medical doctor but soon find her passion lies in reviewing products to help consumers make the right choice. She currently writes on home appliances and with her, you are sure you will get the best guidance on home appliances you have an interest in.