Top 29 Residential Water Heaters on Amazon (Verified You can Buy)
Top 1
Tankless Water Heater Electric 18kW 240 Volt, thermomate On Demand Instant Endless Hot Water Heater, Digital Temperature Display Easy Installation, for Residential Whole House Shower, 76A GRAY
thermomate
ET180
13.12 x 13.12 x 17.12 Inches
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| thermoflow | - | ✅ | ✅ | ✅ |
| THMOS | - | ✅ | ✅ | ✅ |
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
[Instant Unlimited Hot Water] - REQUIRE 2 x Double-pole 40AMP Breakers to Achieve 240V for this On demand tankless electric water heater, providing hot water in 3 seconds when you need it and as long as you need, eliminating wait time, never run out of hot water again and No More cold shower
[Save Money and Space] - Self-modulating technology regulating the amount of energy required to heat water only when you need it with 99.8% efficient, saving up to 60% on water heating cost comparing to traditional tank water heater. Wall mounted compact size with no water tank, convenient for any spaces, saving floor space and fitting into tight spaces.
Top 2
ThermoMate Propane Tankless Water Heater, Up to 3.06 GPM High-Efficiency Instant Hot Water for Bathroom & Kitchen, 75,000 BTU Residential Indoor on-Demand Hot Water Heater, CZ264LP
thermomate
CZ264LP
28.1496 x 15.9449 x 9.8425 inches
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
[Max 3.06 GPM & 75,000 BTU] - The ThermoMate instant water heater reliably delivers a comfortable single shower (2 GPM at 105°F) even when inlet water is as low as 52°F. If the summer inlet temperature reaches 65°F, it maintains full shower performance and can additionally supply a faucet at 0.5 GPM. No waiting time, no cold water shocks, perfect for the bathroom or kitchen.
[Safety & Reliable] - This gas tankless water heater integrates 8 protections: boil-dry, freeze, flame-out, overheating, over-temperature, pipe blockage, high-temperature lock, and excessive air pressure. Equipped with 4 ceramic heating cores, it auto-activates frost protection when temperatures hit 41°F (5℃). The energy-smart system uses minimal electricity to generate gentle warmth, preventing pipe ice buildup without high energy costs.
Top 3
VEVOR Tankless Water Heater Electric, 36KW 240V Black Instant Water Heater, LCD Touch Screen, Digital Temperature Display, Child Security Lock, On Demand for Bathroom, Kitchen, Shower, Mall, Salon
VEVOR
JN36
13.66 x 13.66 x 5.31 inches
33.95 pounds
Ratings for VEVOR (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| VEMIXO | - | ❌ | ❌ | ❌ |
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Die-Cast Aluminum Heating: The water and electricity are separated, with no water tank, avoiding the buildup of scale and reducing the risk of electric leakage. The 36kW heating system can provide water at 30-60°C / 86-140°F within seconds. Before purchasing, please carefully review the product details (voltage, power, additional accessories and parts required, installation information, etc.)
Applicable Regions: You can choose the ideal tankless water heater based on your location. Our hot water heaters feature constant temperature control and over-temperature protection, so you don’t need to worry about sudden temperature fluctuations during showers
Top 4
Best for Rheem
Best for Inline
Best for Tanked
Best for Electric
Best for Rheem
Best for Takagi
Best for Rheem
Best for AO Smith
Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
Rheem
RTEX-13
12.63 x 8.25 x 3.63 Inches
3.9683 Pounds
at least 99.8% energy efficient
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| CARESAN | - | ✅ | ✅ | ✅ |
| CASA CAYOS | - | ✅ | ✅ | ✅ |
| Miami Water Heater | - | ✅ | ✅ | ✅ |
| PRODUCT X MAS | 9,293 | ✅ | ✅ | ✅ |
| Bullit Sales | - | ✅ | ✅ | ✅ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| USA-Fast-Delivery LLC | - | ❌ | ❌ | ❌ |
Features
External adjustable digital thermostatic control with LED display (+/1 degree accuracy
Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
Top 5
ThermoMate Natural Gas Tankless Water Heater, Up to 3.06 GPM 75,000 BTU
thermomate
CZ264NG
13.77 x 13.77 x 21.65 Inches
19.84 pounds
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
[Max 3.06 GPM & 75,000 BTU] - The ThermoMate instant water heater reliably delivers a comfortable single shower (2 GPM at 105°F) even when inlet water is as low as 52°F. If the summer inlet temperature reaches 65°F, it maintains full shower performance and can additionally supply a faucet at 0.5 GPM. No waiting time, no cold water shocks, perfect for the bathroom or kitchen.
[Safety & Reliable] - This gas tankless water heater integrates 8 protections: boil-dry, freeze, flame-out, overheating, over-temperature, pipe blockage, high-temperature lock, and excessive air pressure. Equipped with 4 ceramic heating cores, it auto-activates frost protection when temperatures hit 41°F (5℃). The energy-smart system uses minimal electricity to generate gentle warmth, preventing pipe ice buildup without high energy costs.
Top 6
Best Water Heaters
Best for Inline
Best for Electric
Best for Wall
Best Tankless Water Heaters
14kW Tankless Water Heater Electric, SIVUATEK 240V Instant On-Demand Hot Water Heater, 2 Point of Use, Self-Modulating, ETL Certified, Endless Water Supply for Home
SIVUATEK
TSB-140
12.2 x 12.2 x 17.25 inches
15.0995 Pounds
Ratings for SIVUATEK (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| SIVUATEK-US | - | ❌ | ❌ | ❌ |
Features
【PLEASE NOTE BEFORE PURCHASE】Ensure this 14kW 240V tankless electric water heater meets your hot water demand. Requires 1 x 60-amp circuit breaker. Unit dimensions: 15.87"x11.14"x2.87"; standard 1/2" NPT water connection. No need to disassemble the housing for wiring, making installation faster and more convenient.
【ENERGY-SAVING & EFFICIENT】Eliminate standby energy loss with our electric tankless water heater —no preheating, zero idle power use. Reduce your water heating costs by up to 60% compared to traditional models. Compact and space-saving, it installs flexibly under-sink or on-wall.
ThermoMate Tank Water Heater Electric, 8 Gallon Small Point of Use Residential Hot Water Heater, 1500W 120Volt Compact, Adjustable Thermostat, UL Listed (ES900)
thermomate
ES900
14.0 x 14.0 x 21.0 inches
34.0 Pounds
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
【8 Gallons point of use】 provide enough hot water for sink washing, dishwasher, washing machine or 8 - 12mins quick shower. Factory set temperature to 125°F. It can be adjusted between 90°F and 150°F through built-in thermostat
【20.75-inch low profile】 compact small water heater (120 Volt Hard Wired), independent installation or as booster in-line with a large hot water source, ideal for kitchen & bathroom sink, RV & boat, vacation cabin & camper, garage & barn, shop & salon
Rinnai RE199eP Non-Condensing Propane Tankless Water Heater
Rinnai
REU-VE2737WD-US-P
10.77 x 14.05 x 24.64 Inches
52.8007 Pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,630 | ❌ | ❌ | ❌ |
Features
Smart Design: Improved design of tankless hot water heater only heats when necessary to conserve energy; Speeds installation and enhances serviceability with a cleaner internal layout; LED screen provides service reminders and error codes
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This non-condensing outdoor tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 7.6 GPM (6 fixtures at once)
Rinnai RE180eN Non-Condensing Natural Gas Tankless Water Heater
Rinnai
REU-VE2432WD-US-N
10.77 x 14.05 x 24.64 Inches
53.1005 pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,630 | ❌ | ❌ | ❌ |
Features
Smart Design: Improved design of tankless hot water heater only heats when necessary to conserve energy; Speeds installation and enhances serviceability with a cleaner internal layout; LED screen provides service reminders and error codes
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This outdoor non-condensing tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 6.9 GPM (5 fixtures at once)
Rinnai RE140iN Non-Condensing Natural Gas Tankless Water Heater, Up to 5.3 GPM, Indoor Installation, 140,000 BTU
Rinnai
REU-VE1720FFD-US-N
10.77 x 14.05 x 27.28 inches
50.7504 Pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| eFaucets | 9,630 | ❌ | ❌ | ❌ |
Features
Smart Design: Improved design of tankless hot water heater only heats when necessary to conserve energy; Speeds installation and enhances serviceability with a cleaner internal layout; LED screen provides service reminders and error codes
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This non-condensing indoor tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 5.3 GPM (5 fixtures at once)
Rinnai RUCS65iN Tankless Hot Water Heater, 6.5 GPM, Natural Gas, Indoor Installation
Rinnai
RUCS65IN
22.0 x 14.5 x 35.0 inches
highly efficient
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,630 | ✅ | ✅ | ✅ |
| Amazon.com | - | ✅ | ✅ | ✅ |
| Buildcom | 974 | ❌ | ❌ | ❌ |
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
Rinnai RE180iP Non-Condensing Propane Tankless Water Heater, Up to 8.5 GPM, Indoor Installation, 180,000 BTU
Rinnai
REU-VE2432FFD-US-P
10.77 x 14.05 x 27.28 Inches
53.7509 Pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,630 | ❌ | ❌ | ❌ |
Features
Smart Design: Improved design of tankless hot water heater only heats when necessary to conserve energy; Speeds installation and enhances serviceability with a cleaner internal layout; LED screen provides service reminders and error codes
Never Run Out of Hot Water with this Compact Tankless Propane Water Heater: This non-condensing indoor tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 8.5 GPM (7 fixtures at once)
Top 13
Best for Inline
Best for Electric
Best for NG
Best for Compact
Best for Digital
Best for Mini
Best for Outdoor
Best for Under Sink
Best for Wall
Best Tankless Water Heaters
110V Tankless Water Heater Electric, Jflapil 3000W Tankless Electric Water Heater Instant, Under Sink Water Heater with Digital Display, On Demand Hot Water Heaters Electric for Kitchen Washin
Jflapil
110v tankless water heater 3000w
4.5 x 4.5 x 7.7 inches
2.43 Pounds
Ratings for Jflapil (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Jflapil | - | ❌ | ❌ | ❌ |
Features
【Instant Heating & Precise Temperature Control 】This 110V 3000W tankless water heater adopts premium stainless steel and ABS materials, heating water instantly in seconds without preheating. It supports temperature adjustment from 82°F (0.3GPM) to 131°F (0.5GPM) to meet daily water demands. The built-in LED display supports Celsius and Fahrenheit switching by long pressing the power button for 6 seconds, enabling real-time and accurate temperature monitoring for convenient use
【Full Safety Protection & High Energy Efficiency】 Equipped with comprehensive safety functions, this water heater features IPX4 waterproof, water-electric isolation, leakage-proof, dry-burn-proof and overheating protection, with automatic power-off for idle status. It eliminates daily safety hazards effectively. With a high thermal efficiency of 98%, it cuts down power waste greatly. Intelligent real-time operation monitoring ensures long-term stable and safe working performance
Top 14
Best for Rinnai
Best for Indoor
Best for High Efficiency
Best for Rinnai
Best for AO Smith
Best for 5 GPM
Best for 15 GPM
Rinnai RE140iP Non-Condensing Propane Tankless Water Heater, Up to 5.3 GPM, Indoor Installation, 140,000 BTU
Rinnai
RE140iP
10.77 x 14.05 x 27.28 inches
48.5 pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,630 | ❌ | ❌ | ❌ |
Features
Smart Design: Improved design of tankless hot water heater only heats when necessary to conserve energy; Speeds installation and enhances serviceability with a cleaner internal layout; LED screen provides service reminders and error codes
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This non-condensing indoor tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 5.3 GPM (5 fixtures at once)
Top 15
Best for Rinnai
Best for Indoor
Best for High Efficiency
Best for Rinnai
Best for Rinnai
Best for 15 GPM
Rinnai RE199iN Non-Condensing Natural Gas Tankless Water Heater, Up to 7.6 GPM, Indoor Installation, 199,000 BTU
Rinnai
REU-VE2737FFD-US-N
10.77 x 14.05 x 27.28 inches
52.1 Pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Rhino Supply | - | ✅ | ✅ | ✅ |
| Amazon.com | - | ✅ | ✅ | ✅ |
| eFaucets | 9,630 | ❌ | ❌ | ❌ |
| Voomi Supply | - | ❌ | ❌ | ❌ |
Features
Smart Design: Improved design of tankless hot water heater only heats when necessary to conserve energy; Speeds installation and enhances serviceability with a cleaner internal layout; LED screen provides service reminders and error codes
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This non-condensing indoor tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 7.6 GPM (6 fixtures at once)
Top 16
Best for Rheem
Best for Outdoor
Best for Whole House
Best for High Efficiency
Best for Rheem
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 15 GPM
Rheem RTG-84XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater 8.4 GPM, 180,000 BTUs
Rheem
RTG-84XLN-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 |
|---|---|---|---|---|
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
High-efficiency tankless gas water heater delivers up to 8.4 GPM, perfect for 2–3 bathroom homes with multiple hot water needs like showers and laundry.
Powered by natural gas with 180,000 BTUs, this durable tankless unit ensures fast, reliable hot water—even during peak household demand.
Top 17
ThermoMate 5.28 GPM Condensing Tankless Water Heater, 0.86 UEF High Efficiency Instant On-Demand Hot Water for Whole House Use, Residential Indoor Propane Water Heater with Multi-Point Heating
thermomate
CZ480LP
28.1496 x 15.9449 x 9.8425 Inches
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
[High Efficiency & Dual Heat Exchanger] - This condensing tankless water heater delivers exceptional energy savings with a 0.86 UEF rating, its innovative dual-system pairs a corrosion-resistant stainless steel condensing heat exchanger with a highly conductive oxygen-free copper heat exchanger to maximize heat recovery. By capturing and reusing waste heat that traditional units lose, it operates with up to 30% greater efficiency—dramatically reducing energy consumption and saving you money.
[5.28 GPM & 114,000BTU] - The ThermoMate instant hot water heater delivers consistent hot water to 3-4 fixtures simultaneously, allowing you to have unlimited hot water on demand. No waiting time, no cold water shocks, perfect for busy households. Adopting advanced water flow sensor, the built-in chip can adjust the heating power 20,000 times per second, ensuring that the hot water within ±1℉ fluctuations for a comfortable shower experience.
CAMPLUX Tankless Water Heater Natural Gas, 3.18 GPM Up to 3.8 GPM 82,000 BTU On demand Residential Tankless Hot Water Heater Gas Indoor for Mobile Home, Constant Temperature System, White
CAMPLUX ENJOY OUTDOOR LIFE
CA318W-NG-2
14.37 x 14.37 x 25.39 inches
Ratings for CAMPLUX ENJOY OUTDOOR LIFE (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞: Camplux Up to 3.8 GPM natural gas tankless water heater boasts a heating capacity of 820,000 BTU and a hot water flow rate of 3.18 gallons per minute (GPM). It can provide continuous hot water for 2-3 water supply points, making it sufficient to meet the hot water needs of a household's bathroom, kitchen, and bar area.
𝐒𝐚𝐯𝐞 𝐌𝐨𝐧𝐞𝐲: The tankless gas water heater already includes the exhaust pipe, so you don't need to spend extra money on purchasing it separately. With an oxygen-free copper water tank, it reduces heat loss and lowers energy consumption. Applied with standard 1/2" NPT water fitting and gas inlet.
Top 19
Best for 30 Gallon
Best for Noritz
Best for 2 GPM
Best for 3 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.
GASLAND Gasmart E Natural Gas Tankless Water Heater Indoor, Up to 5.8 GPM 150,000 BTU, CSA Certified Whole House Installation Residential On-demand Instant Hot Water Heater, CE528NG
GASLAND
CE528NG
14.25 x 14.25 x 24.69 Inches
33.1 Pounds
Ratings for GASLAND (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Gasland | - | ❌ | ❌ | ❌ |
Features
Unlimited Hot Water On Demand -- Unlike traditional tank water heaters, our tankless gas water heater provides unlimited hot water whenever you need it. No more waiting for the water to reheat — enjoy continuous hot water for showers, laundry, or washing dishes without interruption.Certified by CSA and equipped with multiple safety features, it meets the highest safety standards for reliable operation.
Energy Efficient & Eco-Friendly -- With an industry-leading UEF of 0.8, our tankless water heater is 34% more energy-efficient than a 50-gallon tank water heater, whose UEF is only 0.6. Save on your energy bill while reducing NOx greenhouse gas emissions by 65% compared to a 50-gallon gas tank. It’s better for the environment and your wallet!
Top 21
Best for High Efficiency
ThermoMate CZ480NG 5.28GPM Condensing Tankless Water Heater, 0.86 UEF High Efficiency Instant On-Demand Hot Water, Residential Indoor Natural Gas Water Heater with Multi-Point Heating
thermomate
CZ480NG
13.77 x 13.77 x 21.65 inches
26.0 Pounds
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
[Save 15% & Dual Heat Exchanger] - With potential savings of 15% compared to non-condensing units, this condensing tankless water heater delivers outstanding 0.86 UEF efficiency, dramatically reducing energy usage and operational expenses. This performance is made possible by an innovative dual heat exchange system, which combines a corrosion-resistant stainless steel condensing heat exchanger with a highly conductive oxygen-free copper heat exchanger, captures and reuses waste heat that conventional units lose, to maximize heat recovery.
[5.28 GPM & 114,000BTU] - The ThermoMate instant hot water heater can supply two showers simultaneously, each delivering 105°F water at a flow rate of 2 GPM, based on an inlet water temperature of 65°F. No waiting time, no cold water shocks, perfect for busy households. Adopting advanced water flow sensor, the built-in chip can adjust the heating power 20,000 times per second, ensuring that the hot water within ±1℉ fluctuations for a comfortable shower experience.
Rheem RTEX-36 36kW Electric Tankless Water Heater 240V Ext Adj Temp Ctrl Bot 3/4 in. Npt Con
Rheem
RTEX-36
24.4008 pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Big Frog Supply | - | ❌ | ❌ | ❌ |
| Columbiatradestock (S/N Info Recorded) | - | ❌ | ❌ | ❌ |
| PRIME store | - | ❌ | ❌ | ❌ |
Top 23
Reliance 6-20-SOMS K 20GAL ELEC Water Heater, 20 Gallon
Reliance
6-20-SOMS K
20.0 x 18.8 x 33.5 inches
68.0 Pounds
Ratings for Reliance (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| PLEXSUPPLY. | 244 | ✅ | ✅ | ✅ |
| Dry 24 Water Restoration LLC | - | ✅ | ✅ | ✅ |
| Hearthshire | 75 | ❌ | ❌ | ❌ |
Features
Provides secure connections to components and lines
Bosch Thermotechnology Tronic 4000 Electric Tankless Water Heater, 8.5 kW, White
Bosch Thermotechnology
7738007417
13.0 x 8.5 x 4.5 inches
5.3131 Pounds
Ratings for Bosch Thermotechnology (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon Resale | - | ❌ | ❌ | ❌ |
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
8.5 KW TANKLESS WATER HEATER: Designed specifically for point of use applications to provide an endless supply of instantaneous hot water for one or more commercial or residential sinks
COMPACT AND LIGHTWEIGHT: Effortlessly fits under sinks
Top 25
18kW Tankless Water Heater Electric, ThermoMate 240 Volt Instant On-Demand Hot Water Heater with Touch Control, Max 4.4 GPM Self-Modulating, ETL Certified for Residential Indoor Shower
thermomate
EH180
13.15 x 13.15 x 17.09 inches
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
Electrical & Installation Requirements: Before purchasing, please ensure your home's main panel has a total electrical capacity of at least 150 Amps. This 18kW unit requires 2 x separate 40 Amp double-pole breakers and 2 x sets of 8 AWG copper wires, and standard 3/4" NPT water connections for proper installation
Instant & Endless Hot Water: Powering up to 4.4 GPM of on-demand hot water, the ThermoMate 240V electric tankless water heater ensures a continuous supply without running out. Perfect for running up to 2-3 plumbing fixtures simultaneously (such as a shower and a bathroom sink) depending on your inlet water temperature
Top 26
Best for Rheem
Rheem RTEX-AB Water Heater Booster
Rheem
RTEX-AB
10.3 x 10.3 x 14.0 inches
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| CASA CAYOS | - | ✅ | ✅ | ✅ |
| Lishollands | - | ✅ | ✅ | ✅ |
| Miami Water Heater | - | ✅ | ✅ | ✅ |
| Amazon.com | - | ❌ | ❌ | ❌ |
| MTL Retailers | - | ❌ | ❌ | ❌ |
Features
Item Weight: 8.5 lb
Country of Origin: United States
Rinnai RUS75eP Tankless Hot Water Heater, 7.5 GPM, Propane, Outdoor Installation
Rinnai
RUS65EP
22.0 x 14.5 x 35.0 Inches
63.0 pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| eFaucets | 9,630 | ✅ | ✅ | ✅ |
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
Rinnai CX199iN Condensing Smart Sense Commercial Natural Gas or Propane Tankless Water Heater, 199,000 BTU, 11.1 GPM
Rinnai
CX199iN
30.11 x 18.5 x 30.11 inches
59.9657 Pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,630 | ❌ | ❌ | ❌ |
| The Portland Group | - | ❌ | ❌ | ❌ |
Features
One Model, Anywhere: This Rinnai tankless water heater is installable indoors or outdoors thanks to our new Versa Vent and powered by either propane or natural gas thanks to a Smart Sense gas control system; RX-OVC vent cap required for outdoor install
Super High Efficiency for Lower Energy Costs: Boasting an impressive thermal efficiency rating of 97%, this tankless water heater optimizes energy usage, helping to significantly reduce operational costs
Top 29
27kW Tankless Water Heater Electric, ThermoMate 240 Volt Instant On-Demand Hot Water Heater with Touch Control, Max 6.6 GPM Self-Modulating, ETL Certified for Residential Indoor Shower
thermomate
EH270
13.15 x 13.15 x 17.09 inches
19.0 Pounds
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
Electrical & Installation Requirements: Before purchasing, please ensure your home's main panel has a total electrical capacity of at least 150 Amps. This 27kW unit requires 3 x separate 40 Amp double-pole breakers and 3 x sets of 8 AWG copper wires, and standard 3/4" NPT water connections for proper installation
Instant & Endless Hot Water: Powering up to 6.6 GPM of on-demand hot water, the ThermoMate 240V electric tankless water heater ensures a continuous supply without running out. Perfect for running up to 3-4 plumbing fixtures simultaneously (such as 2 shower and a bathroom sink) depending on your inlet water temperature
Top 10 Residential Water Heaters - Verified to Buy (September 2026)
- 1. Tankless Water Heater Electric 18kW 240 Volt, thermomate On Demand...
- 2. ThermoMate Propane Tankless Water Heater, Up to 3.06 GPM High-Efficiency...
- 3. VEVOR Tankless Water Heater Electric, 36KW 240V Black Instant Water...
- 4. Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
- 5. ThermoMate Natural Gas Tankless Water Heater, Up to 3.06 GPM...
- 6. 14kW Tankless Water Heater Electric, SIVUATEK 240V Instant On-Demand Hot...
- 7. ThermoMate Tank Water Heater Electric, 8 Gallon Small Point of...
- 8. Rinnai RE199eP Non-Condensing Propane Tankless Water Heater
- 9. Rinnai RE180eN Non-Condensing Natural Gas Tankless Water Heater
- 10. Rinnai RE140iN Non-Condensing Natural Gas Tankless Water Heater, Up to...
Top 10 Residential Water Heaters Brands on Amazon
Here is the list of top-rated brands that were evaluated by CherryPicks.
- thermomate
- VEVOR
- Rheem
- SIVUATEK
- Rinnai
- Jflapil
- CAMPLUX ENJOY OUTDOOR LIFE
- APUS
- GASLAND
- Reliance
Related Residential Water Heaters Guides
For more personalized Residential Water Heaters guides, Check those pages,
Featured Topics
Top 10 Residential 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. PLEXSUPPLY. : 149,268 Yearly Feedback , Avg. Ratings 4.8
- 3. Buildcom : 51,606 Yearly Feedback , Avg. Ratings 4.5
- 4. PRODUCT X MAS : 7,309 Yearly Feedback , Avg. Ratings 4.9
- 5. eFaucets : 7,050 Yearly Feedback , Avg. Ratings 4.4
- 6. Big Frog Supply : 6,493 Yearly Feedback , Avg. Ratings 4.5
- 7. VEMIXO : 3,591 Yearly Feedback , Avg. Ratings 4.1
- 8. Voomi Supply : 2,260 Yearly Feedback , Avg. Ratings 4.1
- 9. Gasland : 1,801 Yearly Feedback , Avg. Ratings 4.6
- 10. The Portland Group : 951 Yearly Feedback , Avg. Ratings 4.9
| Rank | Name | Yearly Feedbacks | Avg. Ratings |
|---|---|---|---|
| 🥇 | Hearthshire | 349,293 | 4.7 |
| 🥈 | PLEXSUPPLY. | 149,268 | 4.8 |
| 🥉 | Buildcom | 51,606 | 4.5 |
| 4 | PRODUCT X MAS | 7,309 | 4.9 |
| 5 | eFaucets | 7,050 | 4.4 |
| 6 | Big Frog Supply | 6,493 | 4.5 |
| 7 | VEMIXO | 3,591 | 4.1 |
| 8 | Voomi Supply | 2,260 | 4.1 |
| 9 | Gasland | 1,801 | 4.6 |
| 10 | The Portland Group | 951 | 4.9 |
[Get] Residential 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 Residential 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 Residential Water Heaters to buy for new September 2026?
CherryPicks’s Methodology for Evaluating Residential 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 Residential Water Heaters reviews based on our selection criteria. It helped us shortlist the top qualified and rated Residential Water Heaters for Rough Plumbing, We found that most customers choose Residential Water Heaters with an average price of $623.56, and the top brands are VEVOR, CAMPLUX ENJOY OUTDOOR LIFE, GASLAND, Rheem, thermomate, Rinnai And Bosch Thermotechnology.
Then our expert-level editors reviewed all those quality items and selected the top 29 Residential Water Heaters for you, We have researched hundreds of sellers and picked the top sellers for Rough Plumbing, including Amazon Resale, Hearthshire, PLEXSUPPLY., Buildcom, PRODUCT X MAS, eFaucets, Big Frog Supply, VEMIXO, Voomi Supply, Gasland, The Portland Group And PRIME store. The Tankless Water Heater Electric 18kW 240 Volt, t... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 744 consumers with an average rating of 4.3.
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 Residential Water Heaters to buy.
Hunter Lambrick is a contributing writer on the Cherrypicksreview platform who specializes in writing articles on outdoor events and home tool products. He has been doing this for a while now and has developed a wealth of experience in it.