Top 30 High Efficiency Water Heaters on Amazon (Verified You can Buy)
Rinnai RXP199iN Condensing Smart Sense Tankless Water Heater
Rinnai
RXP199iN
19.0 x 19.0 x 31.0 inches
58.0 Pounds
High
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| The Portland Group | - | ❌ | ❌ | ❌ |
| eFaucets | 9,712 | ❌ | ❌ | ❌ |
Features
One Model, Anywhere: This Rinnai tankless water heater is installable indoors or outdoors thanks to our new Versa Vent and powered by either propane or natural gas thanks to a Smart Sense gas control system; RX-OVC vent cap required for outdoor install
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This condensing propane and natural gas tankless water heater from Rinnai is only the size of a small suitcase, but provides up to 11.1 GPM (7 fixtures at once)
Top 2
Best for Rheem
Best for Rheem
Best for 50 Gallon
Best for 50 Gallon
Best for Rheem
Best for 3 GPM
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 3
Best for Rinnai
Best for Indoor
Best for Propane
Best Gas Water Heaters
Best for Rinnai
Best for Tankless
Best for Noritz
Best for Rinnai
Best for 9 GPM
Best for 11 GPM
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU
Rinnai
RX199iN
30.11 x 18.5 x 30.11 Inches
55.0 Pounds
High (UEF .98)
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,712 | ❌ | ❌ | ❌ |
| EXPRESS DISTRIBUTION | - | ❌ | ❌ | ❌ |
| Voomi Supply | - | ❌ | ❌ | ❌ |
Features
One Model, Anywhere: This Rinnai tankless water heater is installable indoors or outdoors thanks to our new Versa Vent and powered by either propane or natural gas thanks to a Smart Sense gas control system; RX-OVC vent cap required for outdoor install
Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This condensing propane and natural gas tankless water heater from Rinnai is only the size of a small suitcase, but provides up to 11.1 GPM (7 fixtures at once)
Rheem RRTGH95DVLP3701178 Rheem RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Liquid Propane Tankless Water Heater Stainless Steel
Rheem
RTGH-95DVLP-3
9.8 x 17.7 x 23.7 inches
59.88 pounds
0.82
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Flow rate of 0.4 - 9.5 GPM
Available temperature settings range from 100 to 140F (default setting of 120F)
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
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 7
Best for Rheem
Best for Propane Liquid
Best for Outdoor
Best for Propane
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 3 GPM
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 8
Best for Rheem
Rheem RTG-95XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater 9.5 GPM, 199,900 BTUs
Rheem
RTG-95XLP-3
9.4 x 13.5 x 20.75 inches
39.25 Pounds
Up to 0.82 UEF or 34% more efficient than a standard 50-gallon tank
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
High-efficiency tankless gas water heater delivers up to 9.5 GPM, perfect for 2–3 bathroom homes with multiple hot water needs like showers and laundry.
Powered by liquid propane with 199,900 BTUs, this durable tankless unit ensures fast, reliable hot water—even during peak household demand.
Top 9
Best for Rheem
Best for Gas Powered
Best for Outdoor
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.
Rheem IKONIC RECTGH-SR11iN Professional Grade Super High Efficiency Condensing Tankless Natural Gas Water Heater with Recirculation, 11.2 GPM
Rheem
RECTGH-SR11iN
13.69 x 17.31 x 28.56 inches
86.0 pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Continuous Hot Water & Comfort When Needed – The Rheem IKONIC RECTGH-SR11iN Super High Efficiency condensing tankless gas water heater with recirculation provides enough immediate hot water for your entire house, even when using multiple applications such as a shower and dishwasher
Save on Energy Costs – Rheem’s customizable built-in recirculation saves an average 11,000 gallons of water per year by eliminating the wait for hot water to your shower or sink
Rinnai RE199iP Non-Condensing Propane Tankless Water Heater, Up to 9.8 GPM, Indoor Installation, 199,000 BTU
Rinnai
REU-VE2737FFD-US-P
10.77 x 14.05 x 27.28 inches
53.4004 pounds
0.82
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,712 | ❌ | ❌ | ❌ |
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)
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 | 9,712 | ✅ | ✅ | ✅ |
| Amazon.com | - | ✅ | ✅ | ✅ |
| Buildcom | 972 | ❌ | ❌ | ❌ |
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
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.
Top 14
Best for Indoor
Best Gas Water Heaters
Best for Fogatti
Best for 30 Gallon
Best for 40 Gallon
Best for 75 Gallon
Best for 80 Gallon
Best for Tankless
Best for Takagi
Best for FOGATTI
Best for AO Smith
Best for 7 GPM
FOGATTI Natural Gas Tankless Water Heater Indoor - Max 7.5 GPM 170,000 BTU, CSA Certified Compact Design On Demand Instant Hot Water Heater - Instagas Comfort 170S Series
FOGATTI
InstaGas Comfort
17.1 x 17.1 x 26.2 inches
Ratings for FOGATTI (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Westinghouse Home Comfort Direct | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Powerhouse Performance: The FOGATTI tankless water heater takes up a third of the space of traditional tank heaters but delivers 5 times the performance. With a high heating power of 170,000 BTU and a flow rate of 7.5 GPM, it provides endless hot water on demand, perfect for multitasking households
Instant Heating: Unlike traditional tank heaters, this tankless water heater gas delivers instant and endless hot water as water flows through. Whether it’s for showers, sinks, or appliances, even for 3-5 outlet points, it ensures uninterrupted hot water whenever you need it
Top 15
Best for Battery
Best for LP
Best for NG
Best for Digital
Best for Thermostat
Best for Timer
Best for Waterproof
Best for 60 Gallon
Immersion Water Heater Electric 2000W, Portable Submersible Water Heater with 304 S S Guard & LCD Thermometer, Fast Heating Heats 5 Gallons in Minutes for Bucket, Bathtub, Small Pool, Camping & RV
ISEEKLUX
HT2000
1.0 pounds
Ratings for ISEEKLUX (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ISEEKLUX | - | ❌ | ❌ | ❌ |
Features
🔥【 2000W Rapid Heating – Hot Water in Minutes】： Powered by a high-efficiency 2000W heating element (110–125V), this immersion water heater quickly warms up to 5 gallons of water in just minutes. Ideal for cold weather, camping, cleaning, or quick home use—saving time without wasting energy.For larger volumes, simply extend heating time or use multiple units on separate outlets.
🛡️ 【 Enhanced Safety with 304 Stainless Steel Guard】： Built with a durable 304 stainless steel protective cover, the heater prevents direct contact with the heating element and reduces the risk of burns or container damage. The ventilated guard design improves heat transfer while keeping plastic, rubber, and wooden containers safe.
Top 16
Best for Rheem
Best for Rheem
Best for 40 Gallon
Best for 50 Gallon
Best for Takagi
Best for Rheem
Best for AO Smith
Best for 3 GPM
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.
Rheem RTG-84XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water Heater 8.4 GPM, 180,000 BTUs
Rheem
RTG-84XLP-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.com | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
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 liquid propane with 180,000 BTUs, this durable tankless unit ensures fast, reliable hot water—even during peak household demand.
Top 18
Best for Rheem
Best for Indoor
Best for Residential
Best for Rheem
Best Gas Water Heaters
Best for 50 Gallon
Best for 75 Gallon
Best for Tankless
Best for 50 Gallon
Best for Takagi
Best for Noritz
Best for Rheem
Best for Rinnai
Rheem RRTGH84DVLN3701171 Rheem RTGH Series 8.4 GPM 157,000 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel
Rheem
RTGH-84DVLN-3
9.8 x 17.7 x 23.7 inches
59.88 Pounds
Super High Efficiency
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| MTL Retailers | - | ❌ | ❌ | ❌ |
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
Flow rate of 0.4 - 8.4 GPM
Available temperature settings range from 100 to 140F (default setting of 120F)
Noritz NRC66DVNG Indoor Condensing Direct Tankless Hot Water Heater, 6.6 GPM - Natural Gas
Noritz
NRC661-DV-NG
6.7 x 13.8 x 23.6 inches
38.0 Pounds
Ratings for Noritz (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| NYDIRECT | - | ✅ | ✅ | ✅ |
| Amazon.com | - | ✅ | ✅ | ✅ |
| Buildcom | 972 | ❌ | ❌ | ❌ |
| eFaucets | 9,712 | ❌ | ❌ | ❌ |
Features
Endless hot water
Can be vented with Schedule 40 PVC Pipe and Fitting
Top 20
Best Water Heaters
Best for Inline
Best for Electric
Best for NG
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 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 21
Best for 4 GPM
ThermoMate 98,500 Natural Gas Tankless Water Heater, Up to 4 GPM, High Efficiency Instant On-Demand Hot Water for Whole House Use, Indoor Residential Water Heater with Multi-Point Heating, CZ360NG
thermomate
CZ360NG
13.7795 x 13.7795 x 21.6535 inches
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
[Max 4 GPM & 98,500 BTU] - The ThermoMate instant water heater delivers water hot enough for simultaneous use— at 105°F to a shower (2 GPM) and a kitchen faucet (1 GPM) — from a 62°F inlet. It reliably supplies a comfortable single shower even with a 40°F inlet temperature. No waiting time, no cold water shocks, perfect for busy households. With an advanced flow sensor, its built-in chip regulates heating 20,000 times/sec to keep water temperature within ±1°F for a stable.
[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 22
Rinnai RUCS65IP Tankless Hot Water Heater, 6.5 GPM, Propane, Indoor Installation
Rinnai
RUCS65iP
22.0 x 14.5 x 35.0 inches
62.0 Pounds
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ✅ | ✅ | ✅ |
| eFaucets | 9,712 | ❌ | ❌ | ❌ |
Features
Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
Rheem RTG-84DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater 8.4 GPM, 180,000 BTUs
Rheem
RTG-84DVLN-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 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 24
1000W-110V Immersion Water Heater - 10in Immersion Electric Water Heater - Portable Submersible Water Heater Fit for Camping, Ceramics Cups or Bucket Heating
Gfdoso
1
10.43 x 1.0 x 1.0 inches
Ratings for Gfdoso (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Gfdoso | - | ❌ | ❌ | ❌ |
Features
Durable Structure: Made of high-quality iron material, this immersion water heater electric is lightweight and easy to carry, ensuring long-lasting use
Efficient Heating: 110V 1000W immersion heater can quickly heat up 5 gallons of water in just a few minutes. If you need to heat large capacity water, it is recommended to use multiple immersion water heater
Top 25
ThermoMate 98,500 Propane Tankless Water Heater, Up to 4 GPM, High Efficiency Instant On-Demand Hot Water for Whole House Use, Indoor Residential Water Heater with Multi-Point Heating, CZ360LP
thermomate
CZ360LP
13.77 x 13.77 x 21.65 inches
21.16 Pounds
Ratings for thermomate (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| ThermoMate Official | - | ❌ | ❌ | ❌ |
Features
[Max 4 GPM & 98,500 BTU] - The ThermoMate instant water heater delivers water hot enough for simultaneous use— at 105°F to a shower (2 GPM) and a kitchen faucet (1 GPM) — from a 62°F inlet. It reliably supplies a comfortable single shower even with a 40°F inlet temperature. No waiting time, no cold water shocks, perfect for busy households. With an advanced flow sensor, its built-in chip regulates heating 20,000 times/sec to keep water temperature within ±1°F for a stable.
[Safety & Reliable] - This gas tankless water heater integrates 8 protections: boil-dry, freeze, flame-out, overheating, over-temperature, pipe blockage, high-temperature lock, and excessive air pressure. Equipped with 4 ceramic heating cores, it auto-activates frost protection when temperatures hit 41°F (5℃). The energy-smart system uses minimal electricity to generate gentle warmth, preventing pipe ice buildup without high energy costs.
Top 26
Best for Electric
Best for Battery
Best for Compact
Best for Waterproof
Best for Residential
Best for 120 Volt
Best for Boiler
Best for 10 Gallon
Best for 20 Gallon
Best for 50 Gallon
Best for 60 Gallon
Best for 100 Gallon
VEVOR 10 Gallon Electric Water Heater, Hot Water Heater 1600W, w/LED Display, Knob Control, IPX4 Waterproof, Side Connection On-Demand Heaters for Shower, Bath
VEVOR
FJI-POR-40S2
16.1417 x 16.1417 x 30.7087 Inches
37.5 pounds
Ratings for VEVOR (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| VEMIXO | - | ❌ | ❌ | ❌ |
Features
10-Gallon Water Capacity: With a 10-gallon/40L storage capacity, this heater provides ample hot water for family needs, including dishwashing and laundry. Its 1600W high-power heating reduces wait time for hot water at the faucet.
Immersion Heating Element: The extended immersion heating element ensures continuous hot water delivery for 24 hours. It heats water up to 167℉ / 75℃ and features an LED heating display and rotary temperature control, adjustable from 30℃ to 75℃ / 86℉ to 167℉.
Top 27
Best for 7 GPM
Westinghouse Smart Tankless Water Heater Gas Indoor, 10.3 GPM 199,000 BTU Natural Gas Whole House Instant Hot Water Heater, WiFi App & Voice Control, High Efficiency, Non-Condensing for 7 Fixtures
Westinghouse
HW199A0G-NG
15.9 x 15.9 x 24.8 Inches
Ratings for Westinghouse (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Westinghouse Home Comfort Direct | - | ❌ | ❌ | ❌ |
Features
【Endless Hot Water for Large Homes】Designed for whole-home performance, this natural gas tankless water heater delivers up to 10.3 GPM and 199,000 BTU to supply continuous hot water for 4+ bathrooms, showers, laundry, and appliances simultaneously without sacrificing water pressure or comfort.
【Smart WiFi App & Voice Control】Control your indoor tankless water heater from anywhere using the dedicated smartphone app or voice commands. Easily adjust temperature settings, monitor operation status, receive fault alerts, and enjoy a smarter, more convenient hot water experience.
Top 28
Best Gas Water Heaters
Best for 30 Gallon
Best for 40 Gallon
Best for 50 Gallon
Best for 60 Gallon
Best for Tankless
APUS Tankless Water Heater Natural Gas, Up to 4.42 GPM, Indoor Tankless Water Heater, 95,000 BTU on Demand Instant Hot Water Heaters with Smart Digital Display,Space Gray
APUS
AP-AWH-Q13NG
5.9 x 5.9 x 20.55 inches
19.18 Pounds
Ratings for APUS (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| APUS WATER EQUIPMENT | - | ❌ | ❌ | ❌ |
| Amazon Resale | - | ❌ | ❌ | ❌ |
Features
Powerful & High-Capacity: This high-performance gas tankless water heater delivers 95,000 BTU heating capacity with 4.42GPM high flow rate, featuring innovative 0.66GPM 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 29
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
0.82
Ratings for Rinnai (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| eFaucets | 9,712 | ❌ | ❌ | ❌ |
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)
Rheem RTG-95DVLP-3 High Efficiency Non-Condensing Indoor Tankless Liquid Propane Water Heater 9.5 GPM, 199,900 BTUs
Rheem
RTG Series Liquid Propane RTG-3
10.27 x 13.5 x 24.2 inches
46.5 Pounds
Ratings for Rheem (CPR Score)
| Seller | CPR Rank | Amazon Fulfilled | Prime | Free Shipping |
|---|---|---|---|---|
| Amazon.com | - | ❌ | ❌ | ❌ |
Features
High-efficiency tankless gas water heater delivers up to 9.5 GPM, perfect for 2–3 bathroom homes with multiple hot water needs like showers and laundry.
Powered by liquid propane with 199,900 BTUs, this durable tankless unit ensures fast, reliable hot water—even during peak household demand.
Top 10 High Efficiency Water Heaters - Verified to Buy (September 2026)
- 1. Rinnai RXP199iN Condensing Smart Sense Tankless Water Heater
- 2. Rheem RTG-95DVELN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water...
- 3. NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane...
- 4. Rheem RRTGH95DVLP3701178 Rheem RTGH Series 9.5 GPM 199,900 BTU 120...
- 5. CAMPLUX Climatech 3 Tankless Water Heater Propane 102,000 BTU, 4.22...
- 6. Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt...
- 7. Rheem RTG-70XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water...
- 8. Rheem RTG-95XLP-3 High Efficiency Non-Condensing Outdoor Tankless Liquid Propane Water...
- 9. Rheem RTG-84XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water...
- 10. Rheem IKONIC RECTGH-SR11iN Professional Grade Super High Efficiency Condensing Tankless...
Top 10 High Efficiency Water Heaters Brands on Amazon
Here is the list of top-rated brands that were evaluated by CherryPicks.
- Rinnai
- Rheem
- CAMPLUX ENJOY OUTDOOR LIFE
- thermomate
- FOGATTI
- ISEEKLUX
- Noritz
- Orbek
- Gfdoso
- VEVOR
Related High Efficiency Water Heaters Guides
For more personalized High Efficiency Water Heaters guides, Check those pages,
Featured Topics
Top 10 High Efficiency 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. Buildcom : 51,606 Yearly Feedback , Avg. Ratings 4.5
- 2. eFaucets : 7,050 Yearly Feedback , Avg. Ratings 4.4
- 3. NYDIRECT : 5,541 Yearly Feedback , Avg. Ratings 4.8
- 4. VEMIXO : 3,591 Yearly Feedback , Avg. Ratings 4.1
- 5. Camplux : 2,734 Yearly Feedback , Avg. Ratings 4.7
- 6. Voomi Supply : 2,260 Yearly Feedback , Avg. Ratings 4.1
- 7. The Portland Group : 951 Yearly Feedback , Avg. Ratings 4.9
- 8. MTL Retailers : 498 Yearly Feedback , Avg. Ratings 4.1
- 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 |
|---|---|---|---|
| 🥇 | Buildcom | 51,606 | 4.5 |
| 🥈 | eFaucets | 7,050 | 4.4 |
| 🥉 | NYDIRECT | 5,541 | 4.8 |
| 4 | VEMIXO | 3,591 | 4.1 |
| 5 | Camplux | 2,734 | 4.7 |
| 6 | Voomi Supply | 2,260 | 4.1 |
| 7 | The Portland Group | 951 | 4.9 |
| 8 | MTL Retailers | 498 | 4.1 |
| 9 | Amazon.com | 386 | 4.7 |
| 10 | ThermoMate Official | 371 | 4.7 |
[Get] High Efficiency 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 High Efficiency 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 High Efficiency Water Heaters to buy for new September 2026?
CherryPicks’s Methodology for Evaluating High Efficiency 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 High Efficiency Water Heaters reviews based on our selection criteria. It helped us shortlist the top qualified and rated High Efficiency Water Heaters for Rough Plumbing, We found that most customers choose High Efficiency Water Heaters with an average price of $933.47, and the top brands are VEVOR, Westinghouse, CAMPLUX ENJOY OUTDOOR LIFE, Rheem, thermomate, Rinnai, FOGATTI And Noritz.
Then our expert-level editors reviewed all those quality items and selected the top 30 High Efficiency Water Heaters for you, We have researched hundreds of sellers and picked the top sellers for Rough Plumbing, including Amazon Resale, Buildcom, eFaucets, NYDIRECT, VEMIXO, Camplux, Voomi Supply, The Portland Group, MTL Retailers, Amazon.com, ThermoMate Official And Gfdoso. The Rinnai RXP199iN Condensing Smart Sense Tankless... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 119 consumers with an average rating of 4.6.
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 High Efficiency 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.