Top 10 Best rv tankless in 2026

Last Updated - 6/21/2026

🏆Best Choice

Ranein

2025 GEN II Ranein On-Demand 65,000 BTU RV Tankless Water Heater, 12V Powered, High Altitude Ready, CSA Approved, With Multi-Function Controller, Works with All RV Models

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Endless Hot Water – Advanced deep fire row design maximizes heating efficiency, delivering up to 3.9 GPM at 65,000 BTU. Enjoy continuous hot water even in snowy winter. Adjustable from 95°F to 124°F with staged combustion technology, preventing overheating in summer and conserving propane for longer trips.
•Easy Replacement – Easy to replace most RV water heaters (including Suburban & Atwood 6/10/12-gallon models) with a 12.8" x 12.8" opening (door not included). Compatible door kits (15" x 15", 15" x 18", or 18" x 18") are available for separate purchase.
•Enhanced for Your Convenience - Building on the original design, we’ve upgraded the multi-function remote control to display real-time gas usage, voltage, water flow rate (GPM), anti-freeze activation status, and support operation at high altitudes up to 9,800 feet.
•Safe & Reliable – Features a top-mounted exhaust fan for stable combustion, automatic gas shut-off if flames fail, and an anti-freeze system that activates below 42.8°F to prevent damage. CSA-certified for safety. Includes a built-in pressure relief valve (no separate purchase needed)
•Ideal for - Full-time RVers needing reliable hot water and Campers who enjoy extended showers

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$319.20

$399.00

-20%

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Ranein

Ranein 65,000 BTU RV Tankless Water Heater, High Altitude Available, 12V, CSA Certificated, with Multi-function Controller, On Demand Instant Hot Water Heater, Compatible with all RVs

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•【We've upgraded.】On top of the original. We have upgraded the multi-function remote control. You can view gas usage, voltage, GPM, does anti-freeze device activates, and 9,800ft high altitude available.
•【Replaces all RV water heaters】It has a 12.8 x 12.8" (without door) opening, easy to replace Suburban & Atwood's 6/10/12 gal tank water heaters and your old water heater with appropriate doors. The fitting door kit is available for purchase in 3 sizes: 15" x 15", 15" x 18", or 18" x 18". Door Requires Additional Purchase, Door ASIN: B0D62541MK
•【Long time bath】Deep fire row design can improve heating efficiency. It can produce up to Max 3.9 GMP hot water and has 65,000 BTU power. It can bring you hot water all the time when there is enough gas and water. There is no need to wait for the water to heat up and take a quick bath like with a tank water heater
•【Steady temperature】Temperature ranges from 95°F-124°F. Staged combustion technology controls the amount of flame in summer, prevents the water from getting too hot, and saves the limited propane gas available for caravan travel
•【Save money and comfort】The a tankless RV water heater with a pressure relief valve built into the unit. You don't have to buy and install it separately. It also comes with a PC 6.6 feet intelligent remote controller. This product does not come with a door and needs to be purchased.
•【Safety and reliability】Built-in forced exhaust fan on top for stable combustion and automatic gas shut-off in case of accidental flame failure. It has an anti-freeze device that automatically warms up when the temperature falls below 42.8°F to prevent freezing
•【Buy with confidence】The RV water heater is CSA certified. When installing, please make sure that the voltage of the RV is 12V. We have a professional service team. If you have any questions, please feel free to contact us. We will solve it for you immediately

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$399.00

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LiberLive

RV Tankless Water Heater, On Demand Instant Propane Gas RV Hot Water Heater, DC 12V, 15 x 15 inch Door & Front Water Outlet, 55000 BTUs 3.9 GPM, Compatible with All RVs, Camper, CSA Certificated

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•[UPGRADED RV WATER HEATER] - The upgraded RV water heater features two water outlets: a regular outlet for use inside the RV and an additional outlet for use outside the RV. To use hot water outside the RV, simply open the door of the water heater outside the RV and connect the shower head to the additional water outlet on the RV water heater. This will allow you to enjoy hot water outside the RV (The shower head kit is included in the package)
•[REPLACES ALL RV WATER HEATERS] - This tankless RV water heater features a 13 x 13 inch opening with a wider 15 x 15 inch door. It also includes a smart remote control, allowing for operation from up to 6.6 feet away. This RV water heater is designed to replace other brands of water heaters, providing a seamless upgrade to your RV's water heating system
•[ENJOY ENDLESS HOT WATER] - This RV water heater boasts up to 55,000 BTUs of thermal power, capable of producing 3.9 GPM of hot water per minute. Unlike traditional tank water heaters, it provides a constant stream of hot water for multiple showers without the need for preheating. This RV tankless water heater reaches 124°F in 25 seconds, you can enjoy warm hot water in a short time frame. Whether you're showering, washing dishes, or multi-tasking, this water heater has you covered
•[CONSTANT WATER TEMPERATURE] - The RV water heater is equipped with high-efficiency heating coils to ensure optimal heating performance. The built-in microcomputer control system provides precise flame control and delivers comfortable hot water. Temperature range is 95°F-124°F. This product uses staged combustion technology to control flame size, preventing overheating in the summer and ensuring comfort and energy efficiency. It is also energy efficient, reducing propane consumption by up to 40%
•[HIGH PERFORMANCE AT HIGH ALTITUDES] - Our RV tankless water heaters are designed to perform at high altitudes, enhancing your experience on the road. This RV tankless water heaters are equipped with a high-quality heat exchange system that operates effectively at any altitude, including the Denver Plateau, which is 9,800 feet above sea level. The enhanced NIDEC fan provides 300Pa of power, ensuring a reliable hot water supply even in high-wind conditions
•[SAFETY & RELIABILITY] - This CSA-certified instant water heater boasts nine advanced safety features, including overheat protection, dry burn protection, flame failure protection, freeze protection and anti-scald protection. These safeguards allow you to travel with confidence and ensure reliable performance in any situation
•[EASY INSTALLATION] - We provide a comprehensive installation guide to ensure a straightforward and efficient installation process. RV water heaters require a 12-volt DC power connection and propane. Water inlet & water outlet: 1/2" NPT, Gas inlet: 1/2" NPT with 5/8" NPT adapter. Please note that the RV on-demand water heater must be installed in an area with proper ventilation and exhaust in order to ensure proper operation
•[RELIABLE PROTECTION & SUPPORT] - The LiberLive water heater comes with a comprehensive 1 year warranty that covers the entire unit. Our dedicated customer support team is always on hand to address any questions or concerns, ensuring you enjoy complete peace of mind

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$279.99

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forimo

Tankless Water Heater Propane 4.21GPM 16L Outdoor Portable GasHot Water Heater Instant Propane Water Heater with Digital Display Multi-Protection for Camping Trips Boat Cabins

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•【Efficient & Energey Saving】-The water heater exchanger and main burner are desinged with advanced combustion technology to decrease consumption and burning noise.Maximum power output 68,000btu/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.
•【CSA Approved Safety 】-Tankless Water Heater with CSA Approved Regulator, safe as per Canadian and US Standard.with more safety protection such as flame failure device, anti-freezing protection, over heating protection to ensure the family safety,Automatically decrease water pressure between 3.6-110PSI.
•【Lightweight Portable Design】-Compact size and lightweight make the water heater easy to carry and allow you to enjoy an amazing hot shower after a long day of camping, in your RV, or for giving your pet a bath,Dimension: 13.4x5.9x21.65 inches, Shower head with one button:just press the shower head button once to stop the water flow and prevent water waste.
•【Easy to Install】-Equipped with BSP pipe fittings and all necessary accesories , There are three interface ports under water heater. The left one is the Air inlet. The middle one is the shower port,and The right one is the water inlet, which is very convenient for customers to install.The tankless water heater will "caught on fire with improper operation. Always check whether leakage befor operation.
•【Widely Application】-Our water heater is mainly used for outdoor showering with hot water,provides you a safe and comfortable hot shower at anytime and anywhere, Compact and space-saving design is portable for the outdoors, which bringing an amazing hot shower for you when you are camping, hiking, fishing, beaching, etc. Besides, you can also wash your pets with this tankless water heater.

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$129.99

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FOGATTI

FOGATTI RV Tankless Water Heater, with 15 x 15 inches Black Door and Remote Controller, DC 12V, Best High Altitude Performance, Ideal for RVers' Everyday Use, InstaShower 8 Plus, Gen 2

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•𝐇𝐢𝐠𝐡-𝐀𝐥𝐭𝐢𝐭𝐮𝐝𝐞 𝐑𝐞𝐚𝐝𝐲: 𝐅𝐥𝐚𝐰𝐥𝐞𝐬𝐬 𝐑𝐕 𝐇𝐨𝐭 𝐖𝐚𝐭𝐞𝐫 𝐇𝐞𝐚𝐭𝐞𝐫 𝐭𝐨 𝟗,𝟖𝟎𝟎 𝐅𝐭! The high altitude suitability mode allows the machine to run smoothly even when driving the caravan to the high Denver plateau at 9,800 feet. Staged combustion technology, which controls the amount of flame in summer, prevents the water from getting too hot and saves the limited propane gas available for caravan travel
•𝐀𝐥𝐥 𝐑𝐕 𝐰𝐚𝐭𝐞𝐫 𝐡𝐞𝐚𝐭𝐞𝐫𝐬 𝐜𝐚𝐧 𝐛𝐞 𝐫𝐞𝐩𝐥𝐚𝐜𝐞𝐝: The Fogatti RV water heater have a wide range of applications. The opening is 13 x 13 inches and the door is 15 x 15 inches. It can replace Suburban and Atwood's 6 gallons tank water heaters, as well as Girard and Furrion's tankless water heaters. If you previously used a 10 gallons tank water heater, it would need to be retrofitted with an 18 x 18 inches door
•𝐍𝐞𝐯𝐞𝐫 𝐑𝐮𝐧 𝐎𝐮𝐭: 𝐎𝐮𝐫 𝐑𝐕 𝐓𝐚𝐧𝐤𝐥𝐞𝐬𝐬 𝐖𝐚𝐭𝐞𝐫 𝐇𝐞𝐚𝐭𝐞𝐫 𝐋𝐚𝐬𝐭𝐬 𝟒𝟎+ 𝐌𝐢𝐧 (𝐯𝐬. 𝟖 𝐌𝐢𝐧 𝐓𝐚𝐧𝐤𝐬). With 55,000 BTU of power, it can produce a maximum of 2.9 GPM of hot water. Some tank heaters can only store up to 6-10 gallons of hot water and run out of hot water in 5-8 minutes, whereas our hot water supply lasts over 40 minutes
•𝐒𝐡𝐨𝐰𝐞𝐫 𝐁𝐥𝐢𝐬𝐬 𝐟𝐨𝐫 𝐑𝐕𝐬: 𝐓𝐚𝐧𝐤𝐥𝐞𝐬𝐬, 𝐏𝐫𝐨𝐩𝐚𝐧𝐞, 𝐍𝐨 𝐂𝐨𝐥𝐝 𝐒𝐮𝐫𝐩𝐫𝐢𝐬𝐞𝐬. RV tankless water heaters are taking off. Tankless water heaters are better than tanked water heaters for continuous showering of multiple people. There is no need to waste 20-30 minutes waiting for hot water in the middle of the shower, so you can enjoy hot water at all times. It uses propane for heating, so there is no need to worry about running out of power in your caravan
•𝐀𝐥𝐥-𝐈𝐧𝐜𝐥𝐮𝐬𝐢𝐯𝐞 𝐑𝐕 𝐖𝐚𝐭𝐞𝐫 𝐇𝐞𝐚𝐭𝐞𝐫: 𝐁𝐮𝐢𝐥𝐭-𝐢𝐧 𝐕𝐚𝐥𝐯𝐞 + 𝟏𝟓" 𝐃𝐨𝐨𝐫 + 𝟐𝐦 𝐑𝐞𝐦𝐨𝐭𝐞! Fogatti has always thought of you, with a pressure relief valve built into the product, so you don't have to buy and install it separately. And it also comes with a 15 x 15 inches door and an intelligent remote controller up to 2 meters long
•𝐒𝐚𝐟𝐞𝐭𝐲 𝐚𝐧𝐝 𝐫𝐞𝐥𝐢𝐚𝐛𝐢𝐥𝐢𝐭𝐲; The product is CSA certified and has multiple protection features such as a built-in forced exhaust fan on top, stable combustion, automatic gas shut-off for accidental flame failure and anti-freeze

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$569.99

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RVPart Pro

RVPart Pro RVPart Pro GT60 RV Tankless Water Heater Propane, with 15"x15" Black Door (Standard for Initial Install) and Remote Controller, DC 12V, Optional 15"x18" & 18"x18" Doors (Sold Separately)

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•𝐈𝐧𝐬𝐭𝐚𝐧𝐭 𝐇𝐨𝐭 𝐖𝐚𝐭𝐞𝐫 𝐒𝐮𝐩𝐩𝐥𝐲: Enjoy a constant flow of hot water without waiting. The RVPart Pro tankless water heater delivers on-demand heating. No need to preheat or worry about running out of power, as it runs on propane instead of electricity
•𝐇𝐢𝐠𝐡-𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲: With 60,000 BTU output, an oxygen-free copper heat exchanger, and a brushless DC fan, this heater is built for both high efficiency and high-altitude use (up to 5000+ ft). Segmented combustion helps prevent overheating during summer
•𝐔𝐬𝐞𝐫-𝐅𝐫𝐢𝐞𝐧𝐝𝐥𝐲 𝐎𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧: The built-in microcomputer panel lets you adjust water temperature between 95°F and 123°F. It also displays error codes for quick troubleshooting, making operation simple and stress-free
•𝐂𝐨𝐦𝐩𝐚𝐜𝐭 𝐚𝐧𝐝 𝐋𝐢𝐠𝐡𝐭𝐰𝐞𝐢𝐠𝐡𝐭 𝐃𝐞𝐬𝐢𝐠𝐧: Designed for tight RV spaces, this unit fits a 15" x 15" door with a 13" x 13" opening. Its lightweight, compact build makes installation fast and hassle-free
•𝐒𝐚𝐟𝐞𝐭𝐲 𝐚𝐧𝐝 𝐑𝐞𝐥𝐢𝐚𝐛𝐢𝐥𝐢𝐭𝐲: CSA-certified and backed by 24-month service support, this water heater includes multiple safety features: forced exhaust fan, freeze protection, stable combustion, and auto shut-off for peace of mind

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$399.99

$499.99

-20%

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RVPart Pro

RVPart Pro RVPart Pro GT60 RV Tankless Water Heater, with Remote Controller, DC 12V, Powered by Propane for Off-Grid, Optional 15"x18" & 18"x18" Doors (Sold Separately)

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•𝐈𝐧𝐬𝐭𝐚𝐧𝐭 𝐇𝐨𝐭 𝐖𝐚𝐭𝐞𝐫 𝐒𝐮𝐩𝐩𝐥𝐲: Enjoy a constant flow of hot water without waiting. The RVPart Pro tankless water heater delivers on-demand heating. Instant water heaters feature burners that activate only when hot water is needed—such as during showers, dishwashing, or handwashing—thereby conserving energy. Unlike storage water heaters, they eliminate the need to wait for water to heat up and require no frequent replacement of anode rods
•𝐇𝐢𝐠𝐡-𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲: With 60,000 BTU output, an oxygen-free copper heat exchanger, and a brushless DC fan, this heater is built for both high efficiency and high-altitude use (up to 5000+ ft). Staged combustion technology maintains a constant temperature by minimizing cold spots and overheating
•𝐔𝐬𝐞𝐫-𝐅𝐫𝐢𝐞𝐧𝐝𝐥𝐲 𝐎𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧: The built-in microcomputer panel lets you adjust water temperature between 95°F and 123°F. It also displays error codes for quick troubleshooting, making operation simple and stress-free
•𝐂𝐨𝐦𝐩𝐚𝐜𝐭 𝐚𝐧𝐝 𝐋𝐢𝐠𝐡𝐭𝐰𝐞𝐢𝐠𝐡𝐭 𝐃𝐞𝐬𝐢𝐠𝐧: Designed for tight RV spaces, this unit is designed to fit doors that measure 15"x15", 15"x18", or 18"x18", with an opening of 13"x13". Its lightweight, compact build makes installation fast and hassle-free
•𝐒𝐚𝐟𝐞𝐭𝐲 𝐚𝐧𝐝 𝐑𝐞𝐥𝐢𝐚𝐛𝐢𝐥𝐢𝐭𝐲: CSA-certified and backed by 24-month service support, this water heater includes multiple safety features: forced exhaust fan, freeze protection, stable combustion, and auto shut-off for peace of mind

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$399.99

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hillhub

Hillhub RV Tankless Water Heater, 3.9 GPM On-Demand Instant Hot Water Heater for Motorhome Camper, 65,000 BTU Propane with Stable Temperature for Outdoor Shower & Travel Trailers

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•【Perfect fit】 This RV tankless water heater is designed for easy retrofitting with a standard 12.8" x 12.8" mounting opening, offers a perfect fit for AS, FR, Fleet, CR, and most other major RV brands.
•【High Efficiency】This powerful RV water heater delivers up to 3.9 gallons per minute with a 65,000 BTU output, providing instant hot water on demand wherever your RV adventure leads.
•【Instant Heating】Unlike traditional tank systems, this RV water heater provides instant hot water within 3s without long heating delays, saving both propane and waiting time—perfect for full-time RVers, families, or weekend travelers. It’s the propane water heater that keeps up with every journey.
•【Front Water Outlet】This outdoor RV tankless water heater features a front-mounted water outlet and a 4.9-foot shower kit, ideal for rinsing off sandy feet, muddy pets, or beach gear outside the vehicle—helping keep dirt and mess out of your RV. Whether you're camping by the lake or enjoying a beach party, it delivers clean, comfortable hot water whenever you need it.
•【Stable Temperature】This advanced RV tankless water heater uses vortex mixing and staged combustion to maintain your set temperature from 95°F to 124°F, even during water pressure fluctuations，Protecting us from being scalded by sudden high temperatures
•【Safety Protection】TThis RV tankless water heater is CSA-certified and backed by U.S.-based technical support, featuring advanced safety protections including automatic flame-out shutoff, overheat protection, dry-fire defense, low water pressure startup, and automatic anti-freeze protection down to 42.8°F.
•【High-Altitude Performance】Built-in high-altitude mode ensures stable, long-lasting performance at elevations up to 9,800 feet, making it perfect for mountain RV adventures, boondocking, and remote outdoor exploration.
•【All-Weather Performance】Whether in scorching deserts or freezing winter conditions, this RV propane water heater delivers reliable, on-demand hot water year-round, ensuring consistent performance in any environment.
•【Durable & Reliable】With anti-vibration technology and rugged durability, this RV water heater ensures a smoother, more reliable journey—making it the ideal instant hot water upgrade for campers, travel trailers, and any outdoor RV setup.
•【Space-Saving Design】Compact tankless design measuring 12.6" x 14.74" x 12.5" maximizes interior RV space with efficient, space-saving integration.

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$309.99

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DARTMOOR

DARTMOOR RV Tankless Water Heater, 65000 BTU with Showerhead Kit Control Panel 15 x 15 in White Door, 12V On Demand Instant Hot Water Heater for RV Camping, Propane Gas

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•Endless Hot Water: Dartmoor's RV tankless water heater delivers 65,000 BTU of power and a steady 2.4 gpm flow rate, ensuring continuous, on-demand hot water. Enjoy steamy showers and spotless dishes without ever running out—wherever the road takes you
•Stable Temperature: With staged combustion technology, our camper water heater ensures a stable temperature up to 124°F, preventing overheating while conserving propane. It also performs reliably at high altitudes, providing hot water up to 9,840 ft
•Peace of Mind with Every Use: Equipped with multiple safety features, including dry heating, flameout, overheat, overpressure, and anti-freeze protection, as well as self-diagnosis and more, our RV water heater ensures reliable and worry-free performance
•User-Friendly Control Panel: The intuitive control panel, with a clear display and simple buttons, makes it easy to adjust the temperature, check the fan status, and view fault codes for quick troubleshooting
•Instant Shower Enjoyment: Our water heater for RV features a 15"x15" door and a 12.6"x12.6" cut-out size, designed for a perfect fit in a 13"x13" opening. It also includes a 10 spray mode showerhead kit for a customizable shower experience

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$349.99

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VEVOR

VEVOR RV Tankless Water Heater, Instant Shower with 15 x 15 inches White Door and Remote Controller, 42000BTU Optimized Comfort Performance Hot Water, Ideal for RVers' Family Everyday Use

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Rapid Instant Heating: The RV water heater offers 42,000 BTU of high power, delivering hot water quickly to meet your needs for showering, dishwashing, and more. The RV water heater is CSA certified and has multiple protection features for peace of mind
•All-Season Use: Featuring segmented combustion technology, it adjusts water temperature according to seasonal changes, ensuring comfortable hot water year-round. This energy-saving feature prevents excessively high water temperatures in summer, making it more eco-friendly.
•Convenient Control: Equipped with an LED smart display and touch controls, the rv tankless water heater allows easy temperature adjustment and power control, offering hassle-free operation and effortless monitoring.
•Outdoor Water Outlet: In addition to an internal outlet, this RV water heater is equipped with a front outlet for outdoor use, perfect for washing pets, vehicles, and more. Enjoy added convenience for all your outdoor adventures.
•Compatible with Most RVs: With a door size of 15x15 inches, a rear chamber size of 12.6x12.6x14 inches, and 1/2" NPT water and gas connectors, plus a φ2.36" exhaust pipe, this camper water heater is designed to suit various RVs. Quick connections make setup a breeze!

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$219.99

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