Looking for the Best Outdoor Tankless Water Heater available to buy right now on Amazon but don’t want to have to do all the research on the pros and cons of the different types of Outdoor Tankless Water Heater?
Pop Expert have put together this list of the top 10 selling Outdoor Tankless Water Heater on Amazon – sorted by overall popularity and positive consumer reviews.
The Pop Expert list of top selling Outdoor Tankless Water Heater is the ideal place to start when you are trying to find the Best Outdoor Tankless Water Heater for your neeeds.
Popular Outdoor Tankless Water Heater on Amazon
Details on the Best Outdoor Tankless Water Heater
Bestseller No. 1
Natural Gas Tankless Water Heater,5.26GPM 20L Outdoor,Instant Hot Natural Gas Water Heater with Fahrenheit Digital Display,Multi-Protection
- 【Tankless Water Heater】– This natural gas tankless water heater features steady temperature control and multiple safety protections, including a flame failure device, anti-freeze protection, and overheating protection. It operates with just 3.6 PSI of water pressure, delivering up to 5.26 gallons of hot water per minute. With a maximum temperature rise of 149°F, this unit is designed exclusively for use with natural gas (LNG).
- 【Premium Quality & Durability】– Crafted with a stainless steel body for superior temperature and corrosion resistance, this natural gas water heater is built to last. The oxygen-free copper water tank ensures minimal heat loss and an extended service life. The LED smart digital display allows for easy temperature adjustments between 95°F and 149°F, giving you precise control over your hot water needs.
- 【Efficient & Energy-Saving】– With a high-performance output of 120,000 BTU per hour, this 5.26 GPM instant natural gas water heater delivers on-demand hot water for 3–4 fixtures at the same time, making it an ideal choice for whole-house use. Advanced combustion technology helps reduce gas consumption and lowers operational noise, offering a more efficient and quieter experience for your home.
- 【Fast & Convenient Outdoor Installation】– With a space-saving design measuring 22.8" x 14.4" x 5.9", this tankless water heater is built for quick and easy outdoor setup. It includes a remote control panel for simple indoor operation and runs smoothly with low water pressure from 3.16-150 PSI. Just plug it into a standard 120V AC outlet for a reliable and hassle-free power connection.
- 【Accurate & Consistent Temperature Control】– Equipped with advanced water servo technology and built-in temperature sensors, this tankless natural gas water heater delivers precise regulation of water flow and gas input, keeping temperature fluctuations within ±1℉. The four-stage combustion system ensures steady, reliable performance year-round—whether you're facing freezing winters or scorching summers.
Bestseller No. 2
Propane Tankless Water Heater Outdoor,5.26GPM 20L Outdoor,Instant Hot Propane Gas Water Heater with Fahrenheit Digital Display,Multi-Protection
- 【Tankless Water Heater】– This propane tankless water heater features steady temperature control and multiple safety protections, including a flame failure device, anti-freeze protection, and overheating protection. It operates with just 3.6 PSI of water pressure, delivering up to 5.26 gallons of hot water per minute. With a maximum temperature rise of 149°F, this unit is designed exclusively for use with propane (LPG).
- 【Premium Quality & Durability】– Crafted with a stainless steel body for superior temperature and corrosion resistance, this propane water heater is built to last. The oxygen-free copper water tank ensures minimal heat loss and an extended service life. The LED smart digital display allows for easy temperature adjustments between 95°F and 149°F, giving you precise control over your hot water needs.
- 【Efficient & Energy-Saving】– With a high-performance output of 120,000 BTU per hour, this 5.26 GPM instant propane water heater delivers on-demand hot water for 3–4 fixtures at the same time, making it an ideal choice for whole-house use. Advanced combustion technology helps reduce gas consumption and lowers operational noise, offering a more efficient and quieter experience for your home.
- 【Fast & Convenient Outdoor Installation】– With a space-saving design measuring 22.8" x 14.4" x 5.9", this tankless water heater is built for quick and easy outdoor setup. It includes a remote control panel for simple indoor operation and runs smoothly with low water pressure from 3.16-150 PSI. Just plug it into a standard 120V AC outlet for a reliable and hassle-free power connection.
- 【Accurate & Consistent Temperature Control】– Equipped with advanced water servo technology and built-in temperature sensors, this tankless propane water heater delivers precise regulation of water flow and gas input, keeping temperature fluctuations within ±1℉. The four-stage combustion system ensures steady, reliable performance year-round—whether you're facing freezing winters or scorching summers.
On Sale!Bestseller No. 3
Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 7.0 GPM, Gray
- Continuous Hot Water & Comfort When Needed – Provides enough hot water for your entire house, even when using multiple applications such as a shower and dishwasher
- Save on Energy Costs – High Efficient Water Heater only runs when needed
- Save Water– Water Saving Setting saves up to 1,100 gallons of water per year
- Hot-start programming keeps the water heater in a ready state, avoiding any cold-water bursts
- Save Space - New smaller size, 19%, and reduced weight by 22% compared to the previous model for easy installation and space savings
$804.00
−$40.20
More Details
Bestseller No. 4
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
- 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)
- Smart, Efficient Design: This water heater's modern design includes an easy-to-use interface, Quick Flush feature for simplified flushing, as well as a super-high energy efficiency factor of UEF .98; See Controlr module for WiFi control (not included)
- Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to find a qualified technician to install your tankless water heater, and use the Rinnai Central App for help with setup, service & troubleshooting; We do not recommend installing a water heater without a technician
- Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater size for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
Bestseller No. 5
Propane Tankless Water Heater Outdoor, 5.2 GPM 130000 BTU On Demand Hot Water Heater with Remote Control, 110V Residential Instant Propane Waterheater
- LOW DEMANDS, HIGH STANDARDS - This propane water heater deliver up to 5.2 GPM of instant hot water, capable of supplying 2-4 water outlets simultaneously. The 0.7 GPM minimum water flow requirement ensures reliable use even in low water pressure areas and high-rise buildings
- WISE WATER SUPPLY CHOISE - A tankless on demand water heater lets you say goodbye to those torturous waiting times. Installed outdoors, they save space and reduce safety risks. Propane water heaters are more energy-efficient than electric heaters, wise money-saving decision
- BUILT FOR ALL-WEATHER - The on demand hot water heater is constructed with a thickened corrosion-resistant body, stainless steel vent, variable frequency fan, and a wind-resistant system, providing windproof, freeze-proof, and IPX5 waterproof protection
- FOUR SEASONS SAME TEMP - This propane tankless water heater is equipped with an advanced thermostat system for precise temperature control (temp fluctuation ±1°F). The seven-segment layered combustion technology ensures consistent water temperature throughout the year
- EFFORTLESS SETUP AND OPERATION - Once installed, just press the power button and turn on the hot water tap to enjoy instant hot water. The included controller (15ft wire) allows you to easily adjust the water temperature from indoors. The water outlet/inlet and gas inlet use standard 3/4” NPT connectors
Newest Outdoor Tankless Water Heater
New
US Fast Arrival Tankless Water Heater Propane, 4.21GPM 16L Outdoor Portable Gas Instant Hot Water Heater with Digital Display Sprinkler for Camping Barn Cabin RV 1 Set
- Multi Safety Protection: The tankless water heaters with industry approved regulator, with more safety protection such as flame failure device, anti-freezing protection, over heating protection, just need 3.6PSI of water pressure, 4.21 gallons of hot water can be output per minute. The maximum temperature raise is 167 Fahrenheit.
- Efficient & Energy Saving: The gas water heaters exchanger and main burner are designed with advanced combustion technology to decrease gas consumption and burning noise. Maximum power output, 68000btu/hour, you will get instant endless hot water easily wherever you are. Compact and lightweight structure with 11.5% energy saving technology, so you can get more hot water for less money.
- Complete Accessories: This tankless water heaters come with gas regulator, high pressure shower head with extended long hose and shower holder, there are three interface ports under gas water heaters. The left one is the air inlet, the middle one is the shower port, and the right one is the water inlet.
- Portable Design: Compact size and lightweight design makes the water heaters easy to carry and allows you to enjoy an amazing hot shower after a long day of camping, in your RV, or for giving your pet a bath.
- Widely Use: Perfect for outdoor shower, it brings an amazing hot shower for you when you are camping, hiking, fishing, beaching, portable hot water sink, RV/SUV/MPV, etc. Besides, you can also wash your pets with this tankless water heater, always check gas leakage before operation.
New
MIZUDO Propane Gas Tankless Water Heater, Outdoor Installation Up to 8.1 GPM 180,000 BTU, CSA Certified Instant Hot Water Heater for Residential Whole House, GEN 3
- Designed for Outdoor Use: Mizudo outdoor gas tankless water heater has a wind pressure resistance of 380PA, has IPX4 waterproof protection on the surface, and can operate at low temperatures. It has the ability to adapt to extreme outdoor weather in many aspects.
- Quality Certification: It has passed CSA certification and has protection functions such as overheating protection and accidental flameout protection. It meets national safety standards and protects the safety of you and your family in many aspects.
- Precise Temperature Control: The internal movement can keenly sense changes in water temperature and intelligently adjust the water temperature to ensure that the temperature difference is within ±1℉.
- Continous Hot Water: Powered by propane and 120 volts, tankless water heaters do not need to wait for energy to be restored. They only need to flow through the heat exchanger to achieve endless hot water. Allow you and your family to enjoy a comfortable bath at any time.
- Product Information: Dimensions are H 26.2'' x W 17.1'' x D 7.3''. Compared with tank water heaters, it can save more than 50% of space. The interface is universal 3/4"NPT, which is easy to install.
New
3KW Electric Tankless Water Heater, 110V High Efficiency, On-Demand Hot Water, Eco & Quiet, with Smart Digital Display (110V Black)
- 🚀Enjoy Hot Water On Demand,Our 3KW heating system delivers hot water. Say goodbye to cold showers and high energy bills—heats water only when you need it, reducing standby energy loss by up to 30% compared to traditional tank heaters.
- 🔧Simple Installation & Precise Temperature Control,Designed for standard 110V electrical supply. Features an intuitive smart digital display that allows you to set your desired temperature in 1°F increments. The self-modulating technology adjusts power automatically to maintain your set temperature perfectly.
- 🏠Save Valuable Space with a Durable, Compact Build.Mount it anywhere—garage, basement, utility closet, or even outdoors with an optional cover. Its sleek, wall-mounted design frees up floor space. Built with a high-grade copper heat exchanger and industrial-grade components, it's engineered for years of reliable performance.
- 🛡️Advanced Safety Features & Low Maintenance.Equipped with multiple protection systems: auto shut-off for dry heating, flow and overheat protection, and freeze resistance. The innovative self-cleaning mode helps prevent limescale buildup in hard water areas, extending the heater's lifespan and maintaining peak efficiency with minimal effort.
- 💎The Ideal Upgrade for Modern Homes and Eco-Conscious Families.Perfect for large families, vacation rentals, or anyone seeking reliable, efficient hot water. Its ultra-quiet operation won't disrupt your home's peace.
New
CAMPLUX Portable Tankless Water Heater 1.58 GPM, BW158G Propane Gas Shower for Camping, RV, Pet Washing, 41,000 BTU Outdoor Hot Water System, Battery Operated, Gray
- LIGHTWEIGHT & PORTABLE: Only weighs 13 lbs with a convenient foldable handle. It is effortless to carry and hang for any outdoor use, from camping trips to washing pets in the backyard.
- INSTANT HOT WATER: Delivers a continuous flow rate of 1.58 gallons per minute at 41,000 BTU/hr. Enjoy instant hot water for a quick shower or rinsing dishes without waiting.
- EASY TO INSTALL: Simply connect to a standard garden hose (adapters included) and a 20 lb propane tank. Powered by 2 "D" cell batteries, requiring no electricity, so you can set it up anywhere in minutes.
- ENERGY SAVING CONTROL: Features ECO & FULL gas modes along with a clear LED temperature display. Allows you to switch modes to save gas in summer while getting your ideal water temperature easily.
- LOW WATER PRESSURE START: Ignites with a minimum of 3.0 PSI water pressure. Works perfectly with 12V water pumps or gravity systems, making it suitable for rural cabins and off-grid areas.
New
CAMPLUX Portable Tankless Water Heater 55,000 BTU, 2.11 GPM Instant Propane Gas Shower for Camping, RV, Outdoor, Battery Operated with Handle, Gray, BW211G
- INSTANT HOT SHOWER: Delivers 2.11 GPM continuous hot water with 55,000 BTU output. Heats up in seconds. Enjoy a comfortable bath anywhere without waiting.
- BATTERY POWERED IGNITION: Runs on 2 "D" cell batteries. No electrical hookup required. Ideal for off-grid living, hunting cabins, and emergency backups.
- LOW PRESSURE START: Ignites easily at just 3.0 PSI. Works great with 12V pumps or gravity-fed systems. No more worries about unstable water sources.
- QUICK & EASY SETUP: Comes with a folding handle and necessary adapters. Compact design allows you to install it in minutes. No tools or professional help needed.
- 6-IN-1 SAFETY PROTECTION: CSA certified for your peace of mind. Features anti-freezing, overheating control, and flame failure device. Safe for the whole family.